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616915dd | 1 | /* |
11db3170 | 2 | ** Splint - annotation-assisted static program checker |
c59f5181 | 3 | ** Copyright (C) 1994-2003 University of Virginia, |
616915dd | 4 | ** Massachusetts Institute of Technology |
5 | ** | |
6 | ** This program is free software; you can redistribute it and/or modify it | |
7 | ** under the terms of the GNU General Public License as published by the | |
8 | ** Free Software Foundation; either version 2 of the License, or (at your | |
9 | ** option) any later version. | |
10 | ** | |
11 | ** This program is distributed in the hope that it will be useful, but | |
12 | ** WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | ** General Public License for more details. | |
15 | ** | |
16 | ** The GNU General Public License is available from http://www.gnu.org/ or | |
17 | ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
18 | ** MA 02111-1307, USA. | |
19 | ** | |
155af98d | 20 | ** For information on splint: info@splint.org |
21 | ** To report a bug: splint-bug@splint.org | |
11db3170 | 22 | ** For more information: http://www.splint.org |
616915dd | 23 | */ |
24 | /* | |
25 | ** storeRef.c | |
26 | ** | |
27 | ** Memory management: | |
28 | ** storeRef's are kept in allRefs for each function scope, and all are | |
29 | ** free'd at the end of the function. This relies on the constraint that | |
30 | ** no storeRef created while checking a function is used outside that | |
31 | ** function. | |
32 | ** | |
33 | ** storeRefs in the file and global scopes are free'd by the uentry. | |
34 | ** | |
35 | */ | |
36 | ||
1b8ae690 | 37 | # include "splintMacros.nf" |
616915dd | 38 | # include "basic.h" |
39 | # include "exprChecks.h" | |
28bf4b0b | 40 | # include "transferChecks.h" |
616915dd | 41 | # include "sRefTable.h" |
42 | # include "structNames.h" | |
43 | ||
44 | /* | |
45 | ** Predicate functions that evaluate both arguments in order. | |
46 | */ | |
47 | ||
48 | /*@notfunction@*/ | |
49 | # define OR(a,b) (a ? (b, TRUE) : b) | |
50 | ||
51 | /*@notfunction@*/ | |
52 | # define AND(a,b) (a ? b : (b, FALSE)) | |
53 | ||
28bf4b0b | 54 | static void sRef_checkValidAux (sRef p_s, sRefSet p_checkedsofar) /*@modifies p_checkedsofar@*/ ; |
55 | ||
616915dd | 56 | static bool sRef_isDerived (sRef p_s) /*@*/ ; |
57 | ||
58 | static /*@exposed@*/ sRef sRef_fixDirectBase (sRef p_s, sRef p_base) | |
59 | /*@modifies p_base@*/ ; | |
60 | ||
28bf4b0b | 61 | static void sRef_updateNullState (sRef p_res, sRef p_other) /*@modifies p_res@*/ ; |
62 | ||
616915dd | 63 | static bool sRef_isAllocatedStorage (sRef p_s) /*@*/ ; |
64 | static void sRef_setNullErrorLoc (sRef p_s, fileloc) /*@*/ ; | |
393e573f | 65 | static void sRef_setNullStateN (sRef p_s, nstate p_n) /*@modifies p_s@*/ ; |
616915dd | 66 | |
616915dd | 67 | static int sRef_depth (sRef p_s) /*@*/ ; |
68 | ||
69 | static void | |
70 | sRef_innerAliasSetComplete (void (p_predf) (sRef, fileloc), sRef p_s, | |
71 | fileloc p_loc) | |
72 | /*@modifies p_s@*/ ; | |
73 | ||
74 | static void | |
28bf4b0b | 75 | sRef_innerAliasSetCompleteParam (void (p_predf) (sRef, sRef), sRef p_s, sRef p_t) |
76 | /*@modifies p_s@*/ ; | |
77 | ||
616915dd | 78 | static speckind speckind_fromInt (int p_i); |
79 | static bool sRef_equivalent (sRef p_s1, sRef p_s2); | |
80 | static bool sRef_isDeepUnionField (sRef p_s); | |
28bf4b0b | 81 | static void sRef_addDeriv (/*@notnull@*/ sRef p_s, /*@notnull@*/ /*@exposed@*/ sRef p_t); |
616915dd | 82 | static bool sRef_checkModify (sRef p_s, sRefSet p_sl) /*@*/ ; |
83 | ||
60868d40 | 84 | /* |
85 | ** If s is definitely null, it has no memory state. | |
86 | */ | |
87 | ||
88 | static void sRef_resetAliasKind (/*@notnull@*/ sRef s) /*@modifies s->aliaskind@*/ | |
89 | { | |
90 | if (s->nullstate == NS_DEFNULL) | |
91 | { | |
92 | /* s->aliaskind = AK_ERROR; */ | |
93 | } | |
94 | } | |
95 | ||
6483a926 | 96 | # ifdef DEBUGSPLINT |
97 | extern void sRef_checkCompletelyReasonable (sRef s) /*@*/ | |
98 | { | |
99 | DPRINTF (("Check sRef: [%p] %s / %s", s, sRef_unparse (s), | |
100 | sRefSet_unparse (sRef_derivedFields (s)))); | |
101 | ||
102 | if (sRef_isReasonable (s)) | |
103 | { | |
104 | sRefSet_elements (s->deriv, el) | |
105 | { | |
106 | llassert (el != s); | |
107 | sRef_checkCompletelyReasonable (el); | |
108 | } end_sRefSet_elements ; | |
109 | } | |
110 | } | |
111 | # endif | |
112 | ||
113 | /*@falsewhennull@*/ bool sRef_isReasonable (sRef s) /*@*/ | |
114 | { | |
115 | if (sRef_isValid (s)) | |
116 | { | |
117 | # ifdef DEBUGSPLINT | |
118 | if (!bool_isReasonable (s->safe) | |
119 | || !bool_isReasonable (s->modified) | |
120 | || !bool_isReasonable (s->immut)) | |
121 | { | |
122 | llcontbug (message ("Unreasonable sRef [%p]", s)); | |
123 | return FALSE; | |
124 | } | |
125 | ||
126 | if (!sstate_isValid (s->defstate)) | |
127 | { | |
128 | llcontbug (message ("Unreasonable sRef [%p]", s)); | |
129 | return FALSE; | |
130 | } | |
131 | ||
132 | if (!nstate_isValid (s->nullstate)) | |
133 | { | |
134 | llcontbug (message ("Unreasonable sRef [%p]", s)); | |
135 | return FALSE; | |
136 | } | |
137 | ||
138 | if (!alkind_isValid (s->aliaskind) | |
139 | || !alkind_isValid (s->oaliaskind)) | |
140 | { | |
141 | llcontbug (message ("Unreasonable sRef [%p]", s)); | |
142 | return FALSE; | |
143 | } | |
144 | ||
145 | if (!exkind_isValid (s->expkind) | |
146 | || !exkind_isValid (s->oexpkind)) | |
147 | { | |
148 | llcontbug (message ("Unreasonable sRef [%p]", s)); | |
149 | return FALSE; | |
150 | } | |
151 | # endif | |
152 | ||
153 | return TRUE; | |
154 | } | |
155 | ||
156 | return FALSE; | |
157 | } | |
158 | ||
159 | static /*@nullwhentrue@*/ bool sRef_isUnreasonable (sRef s) /*@*/ | |
160 | { | |
161 | return (!sRef_isReasonable (s)); | |
162 | } | |
163 | ||
28bf4b0b | 164 | static void sRef_checkMutable (/*@unused@*/ sRef s) |
165 | { | |
6483a926 | 166 | if (sRef_isReasonable (s) && s->immut) |
28bf4b0b | 167 | { |
168 | llcontbug (message ("Modification to sRef marked immutable: %q", | |
169 | sRef_unparseFull (s))); | |
170 | } | |
171 | } | |
172 | ||
616915dd | 173 | static bool skind_isSimple (skind sk) |
174 | { | |
175 | switch (sk) | |
176 | { | |
177 | case SK_PARAM: case SK_CVAR: case SK_CONST: | |
178 | case SK_OBJECT: case SK_UNKNOWN: case SK_NEW: | |
179 | return TRUE; | |
180 | default: | |
181 | return FALSE; | |
182 | } | |
183 | } | |
184 | ||
185 | static void sinfo_free (/*@special@*/ /*@temp@*/ /*@notnull@*/ sRef p_s) | |
186 | /*@uses p_s->kind, p_s->info@*/ | |
187 | /*@releases p_s->info@*/ ; | |
188 | ||
189 | static /*@null@*/ sinfo sinfo_copy (/*@notnull@*/ sRef p_s) /*@*/ ; | |
190 | static void sRef_setPartsFromUentry (sRef p_s, uentry p_ue) | |
191 | /*@modifies p_s@*/ ; | |
16c024b5 | 192 | static bool checkDeadState (/*@notnull@*/ sRef p_el, /*@null@*/ sRef p_e2, |
193 | bool p_tbranch, fileloc p_loc); | |
28bf4b0b | 194 | static /*@dependent@*/ sRef sRef_constructPointerAux (/*@notnull@*/ /*@exposed@*/ sRef p_t) /*@*/ ; |
616915dd | 195 | |
196 | static void | |
197 | sRef_combineExKinds (/*@notnull@*/ sRef p_res, /*@notnull@*/ sRef p_other) | |
198 | /*@modifies p_res@*/ ; | |
199 | ||
200 | static void | |
201 | sRef_combineAliasKinds (/*@notnull@*/ sRef p_res, /*@notnull@*/ sRef p_other, | |
202 | clause p_cl, fileloc p_loc) | |
203 | /*@modifies p_res@*/ ; | |
204 | ||
205 | static void | |
206 | sRef_combineNullState (/*@notnull@*/ sRef p_res, /*@notnull@*/ sRef p_other) | |
207 | /*@modifies p_res@*/ ; | |
208 | ||
209 | static void | |
210 | sRef_combineDefState (/*@notnull@*/ sRef p_res, /*@notnull@*/ sRef p_other) | |
211 | /*@modifies p_res@*/ ; | |
212 | ||
213 | static void sRef_setStateFromAbstractUentry (sRef p_s, uentry p_ue) | |
214 | /*@modifies p_s@*/ ; | |
215 | ||
216 | static void | |
217 | sinfo_update (/*@notnull@*/ /*@exposed@*/ sRef p_res, | |
218 | /*@notnull@*/ /*@exposed@*/ sRef p_other); | |
616915dd | 219 | static void sRef_setDefinedAux (sRef p_s, fileloc p_loc, bool p_clear) |
220 | /*@modifies p_s@*/ ; | |
221 | static void sRef_setDefinedNoClear (sRef p_s, fileloc p_loc) | |
222 | /*@modifies p_s@*/ ; | |
223 | static void sRef_setStateAux (sRef p_s, sstate p_ss, fileloc p_loc) | |
224 | /*@modifies p_s@*/; | |
225 | ||
226 | static /*@exposed@*/ sRef | |
227 | sRef_buildNCField (/*@exposed@*/ sRef p_rec, /*@exposed@*/ cstring p_f); | |
228 | ||
229 | static void | |
230 | sRef_mergeStateAux (/*@notnull@*/ sRef p_res, /*@notnull@*/ sRef p_other, | |
231 | clause p_cl, bool p_opt, fileloc p_loc, | |
232 | bool p_doDerivs) | |
233 | /*@modifies p_res, p_other@*/ ; | |
234 | ||
235 | static /*@null@*/ sinfo sinfo_fullCopy (/*@notnull@*/ sRef p_s); | |
236 | static bool sRef_doModify (sRef p_s, sRefSet p_sl) /*@modifies p_s@*/ ; | |
237 | static bool sRef_doModifyVal (sRef p_s, sRefSet p_sl) /*@modifies p_s@*/; | |
238 | static bool sRef_checkModifyVal (sRef p_s, sRefSet p_sl) /*@*/ ; | |
239 | ||
240 | static /*@only@*/ sRefSet | |
241 | sRef_mergeDerivs (/*@only@*/ sRefSet p_res, sRefSet p_other, | |
242 | bool p_opt, clause p_cl, fileloc p_loc); | |
243 | ||
244 | static /*@only@*/ sRefSet | |
245 | sRef_mergeUnionDerivs (/*@only@*/ sRefSet p_res, | |
246 | /*@exposed@*/ sRefSet p_other, | |
247 | bool p_opt, clause p_cl, fileloc p_loc); | |
248 | ||
249 | static /*@only@*/ sRefSet | |
250 | sRef_mergePdefinedDerivs (/*@only@*/ sRefSet p_res, sRefSet p_other, bool p_opt, | |
251 | clause p_cl, fileloc p_loc); | |
252 | ||
253 | static /*@only@*/ cstring sRef_unparseWithArgs (sRef p_s, uentryList p_args); | |
254 | static /*@only@*/ cstring sRef_unparseNoArgs (sRef p_s); | |
255 | ||
256 | static /*@exposed@*/ sRef sRef_findDerivedPointer (sRef p_s); | |
3120b462 | 257 | static /*@exposed@*/ sRef sRef_findDerivedArrayFetch (/*@notnull@*/ sRef, bool, int, bool) ; |
616915dd | 258 | static /*@exposed@*/ sRef sRef_findDerivedField (/*@notnull@*/ sRef p_rec, cstring p_f); |
259 | static /*@exposed@*/ sRef | |
260 | sRef_getDeriv (/*@notnull@*/ /*@returned@*/ sRef p_set, sRef p_guide); | |
261 | ||
262 | static bool inFunction = FALSE; | |
263 | static /*@only@*/ sRefTable allRefs; | |
264 | ||
265 | /* # define DEBUGREFS */ | |
266 | ||
267 | # ifdef DEBUGREFS | |
268 | static nsrefs = 0; | |
269 | static totnsrefs = 0; | |
270 | static maxnsrefs = 0; | |
271 | static ntotrefers = 0; | |
272 | static nrefers = 0; | |
273 | # endif | |
274 | ||
28bf4b0b | 275 | static /*@checked@*/ bool protectDerivs = FALSE; |
616915dd | 276 | |
28bf4b0b | 277 | /* |
278 | ** Result of sRef_alloc is dependent since allRefs may | |
279 | ** reference it. It is only if !inFunction. | |
280 | */ | |
281 | ||
282 | static /*@dependent@*/ /*@out@*/ /*@notnull@*/ sRef | |
283 | sRef_alloc (void) | |
284 | { | |
285 | sRef s = (sRef) dmalloc (sizeof (*s)); | |
286 | ||
287 | s->immut = FALSE; | |
288 | ||
289 | DPRINTF (("Alloc sref: [%p]", s)); | |
290 | ||
291 | if (inFunction) | |
292 | { | |
293 | allRefs = sRefTable_add (allRefs, s); | |
294 | /*@-branchstate@*/ | |
295 | } | |
296 | else | |
297 | { | |
298 | DPRINTF (("Not in function!")); | |
299 | } | |
300 | ||
301 | /*@=branchstate@*/ | |
302 | ||
303 | # ifdef DEBUGREFS | |
304 | if (nsrefs >= maxnsrefs) | |
305 | { | |
306 | maxnsrefs = nsrefs; | |
307 | } | |
308 | ||
309 | totnsrefs++; | |
310 | nsrefs++; | |
311 | # endif | |
312 | ||
313 | /*@-mustfree@*/ /*@-freshtrans@*/ | |
314 | return s; | |
315 | /*@=mustfree@*/ /*@=freshtrans@*/ | |
316 | } | |
317 | ||
318 | static void sRef_checkValidAux (sRef s, sRefSet checkedsofar) | |
319 | { | |
320 | llassert (FALSE); | |
321 | ||
6483a926 | 322 | if (!sRef_isReasonable (s)) return; |
28bf4b0b | 323 | |
324 | if (sRefSet_containsSameObject (checkedsofar, s)) | |
325 | { | |
326 | return; | |
327 | } | |
328 | ||
329 | /*@-temptrans@*/ | |
330 | checkedsofar = sRefSet_insert (checkedsofar, s); | |
331 | /*@=temptrans@*/ /* checksofar will be destroyed before checkValid returns */ | |
332 | ||
333 | switch (s->kind) | |
334 | { | |
335 | case SK_UNCONSTRAINED: | |
336 | llassert (cstring_length (s->info->fname) < 100); | |
337 | break; | |
338 | ||
339 | case SK_CVAR: | |
340 | llassert (s->info->cvar->lexlevel >= 0); | |
341 | /* llassert (s->info->cvar->lexlevel <= usymtab_getCurrentDepth ()); */ | |
342 | break; | |
343 | ||
344 | case SK_PARAM: | |
345 | llassert (s->info->paramno >= -1); | |
b73d1009 | 346 | llassert (s->info->paramno <= 999); /* sanity check */ |
28bf4b0b | 347 | break; |
348 | ||
349 | case SK_ARRAYFETCH: | |
350 | sRef_checkValidAux (s->info->arrayfetch->arr, checkedsofar); | |
351 | break; | |
352 | ||
353 | case SK_FIELD: | |
354 | sRef_checkValidAux (s->info->field->rec, checkedsofar); | |
355 | llassert (cstring_length (s->info->field->field) < 100); | |
356 | break; | |
357 | ||
358 | case SK_PTR: | |
359 | sRef_checkValidAux (s->info->ref, checkedsofar); | |
360 | break; | |
361 | ||
362 | case SK_ADR: | |
363 | sRef_checkValidAux (s->info->ref, checkedsofar); | |
364 | break; | |
365 | ||
366 | case SK_OBJECT: | |
367 | /* check ctype s->info->object */ | |
368 | break; | |
369 | ||
370 | case SK_CONJ: | |
371 | sRef_checkValidAux (s->info->conj->a, checkedsofar); | |
372 | sRef_checkValidAux (s->info->conj->b, checkedsofar); | |
373 | break; | |
374 | ||
375 | case SK_NEW: | |
376 | llassert (cstring_length (s->info->fname) < 100); | |
377 | break; | |
378 | ||
379 | case SK_DERIVED: | |
380 | sRef_checkValidAux (s->info->ref, checkedsofar); | |
381 | break; | |
382 | ||
383 | case SK_EXTERNAL: | |
384 | sRef_checkValidAux (s->info->ref, checkedsofar); | |
385 | break; | |
386 | ||
387 | case SK_TYPE: | |
388 | case SK_CONST: | |
389 | case SK_RESULT: | |
390 | /* check ctyp s->type */ | |
391 | break; | |
392 | ||
393 | case SK_SPECIAL: | |
394 | llassert (s->info->spec == SR_NOTHING | |
395 | || s->info->spec == SR_INTERNAL | |
396 | || s->info->spec == SR_SPECSTATE | |
397 | || s->info->spec == SR_SYSTEM); | |
398 | break; | |
399 | ||
400 | case SK_UNKNOWN: | |
401 | break; | |
402 | ||
403 | BADDEFAULT; | |
404 | } | |
405 | ||
406 | ||
407 | sRefSet_elements (s->deriv, el) | |
408 | { | |
409 | sRef_checkValidAux (el, checkedsofar); | |
410 | } end_sRefSet_elements ; | |
411 | } | |
412 | ||
413 | void sRef_checkValid (/*@unused@*/ sRef s) | |
414 | { | |
415 | return; | |
416 | /* | |
417 | sRefSet checkedsofar = sRefSet_new (); | |
418 | sRef_checkValidAux (s, checkedsofar); | |
419 | */ | |
420 | } | |
421 | ||
422 | static /*@dependent@*/ /*@notnull@*/ /*@special@*/ sRef | |
423 | sRef_new (void) | |
424 | /*@defines result@*/ | |
425 | /*@ensures isnull result->aliasinfo, result->definfo, | |
426 | result->expinfo, result->info, result->deriv, result->state@*/ | |
427 | { | |
428 | sRef s = sRef_alloc (); | |
429 | ||
430 | s->kind = SK_UNKNOWN; | |
431 | s->safe = TRUE; | |
432 | s->modified = FALSE; | |
433 | s->immut = FALSE; | |
b9904f57 | 434 | s->val = multiVal_undefined; |
28bf4b0b | 435 | |
436 | s->type = ctype_unknown; | |
437 | s->defstate = SS_UNKNOWN; | |
438 | ||
439 | /* start modifications */ | |
440 | s->bufinfo.bufstate = BB_NOTNULLTERMINATED; | |
b73d1009 | 441 | s->bufinfo.size = -1; |
442 | s->bufinfo.len = -1; | |
28bf4b0b | 443 | /* end modifications */ |
444 | ||
445 | s->aliaskind = AK_UNKNOWN; | |
446 | s->oaliaskind = AK_UNKNOWN; | |
447 | ||
448 | s->nullstate = NS_UNKNOWN; | |
449 | ||
450 | s->expkind = XO_UNKNOWN; | |
451 | s->oexpkind = XO_UNKNOWN; | |
452 | ||
453 | s->aliasinfo = stateInfo_undefined; | |
454 | s->definfo = stateInfo_undefined; | |
455 | s->nullinfo = stateInfo_undefined; | |
456 | s->expinfo = stateInfo_undefined; | |
457 | ||
458 | s->info = NULL; | |
459 | s->deriv = sRefSet_undefined; | |
460 | ||
461 | s->state = valueTable_undefined; | |
462 | ||
463 | return s; | |
464 | } | |
465 | ||
466 | static /*@dependent@*/ /*@notnull@*/ /*@special@*/ sRef | |
467 | sRef_newRef (void) | |
468 | /*@defines result@*/ | |
469 | /*@ensures isnull result->aliasinfo, result->definfo, | |
470 | result->expinfo, result->info, result->deriv@*/ | |
471 | { | |
472 | sRef res = sRef_new (); | |
473 | res->immut = FALSE; | |
474 | res->state = valueTable_undefined; | |
475 | return res; | |
476 | } | |
616915dd | 477 | |
616915dd | 478 | |
479 | void sRef_protectDerivs (void) /*@modifies protectDerivs@*/ | |
480 | { | |
481 | llassert (!protectDerivs); | |
482 | protectDerivs = TRUE; | |
483 | } | |
484 | ||
485 | void sRef_clearProtectDerivs (void) /*@modifies protectDerivs@*/ | |
486 | { | |
487 | llassert (protectDerivs); | |
488 | protectDerivs = FALSE; | |
489 | } | |
490 | ||
491 | /* | |
492 | ** hmmm...here be kind of a hack. This function mysteriously appeared | |
493 | ** in my code, but I'm sure I didn't write it. | |
494 | */ | |
495 | ||
496 | bool | |
497 | sRef_isRecursiveField (sRef s) | |
498 | { | |
499 | if (sRef_isField (s)) | |
500 | { | |
501 | if (sRef_depth (s) > 13) | |
502 | { | |
503 | sRef base; | |
504 | cstring fieldname; | |
505 | ||
506 | fieldname = sRef_getField (s); | |
507 | base = sRef_getBase (s); | |
508 | ||
6483a926 | 509 | while (sRef_isReasonable (base)) |
616915dd | 510 | { |
511 | if (sRef_isField (base)) | |
512 | { | |
513 | if (cstring_equal (fieldname, sRef_getField (base))) | |
514 | { | |
515 | return TRUE; | |
516 | } | |
517 | } | |
518 | ||
519 | base = sRef_getBaseSafe (base); | |
520 | } | |
521 | } | |
522 | } | |
523 | ||
524 | return FALSE; | |
525 | } | |
526 | ||
527 | static void | |
28bf4b0b | 528 | sRef_addDeriv (/*@notnull@*/ sRef s, /*@notnull@*/ /*@exposed@*/ sRef t) |
616915dd | 529 | { |
530 | if (!context_inProtectVars () | |
531 | && !protectDerivs | |
6483a926 | 532 | && sRef_isReasonable (s) |
533 | && sRef_isReasonable (t) | |
616915dd | 534 | && !sRef_isConst (s)) |
535 | { | |
536 | int sd = sRef_depth (s); | |
537 | int td = sRef_depth (t); | |
538 | ||
539 | if (sd >= td) | |
540 | { | |
541 | return; | |
542 | } | |
543 | ||
3120b462 | 544 | /* This sometimes fails: (evans 2001-07-12) |
545 | if (sRef_isArrayFetch (t)) | |
546 | { | |
547 | DPRINTF (("Derived fetch: %s / %s / %s", | |
548 | sRef_unparseFull (s), sRef_unparseFull (t), | |
549 | sRef_unparseFull (t->info->arrayfetch->arr))); | |
550 | llassert (t->info->arrayfetch->arr == s); | |
551 | } | |
552 | */ | |
553 | ||
28bf4b0b | 554 | if (sRef_isFileOrGlobalScope (s)) |
616915dd | 555 | { |
556 | if (context_inFunctionLike () | |
557 | && ctype_isKnown (sRef_getType (s)) | |
558 | && !ctype_isFunction (sRef_getType (s))) | |
559 | { | |
560 | globSet g = context_getUsedGlobs (); | |
561 | ||
562 | if (!globSet_member (g, s)) | |
563 | { | |
564 | /* | |
565 | ** don't report as a bug | |
566 | ** | |
567 | ||
568 | llcontbug | |
569 | (message ("sRef_addDeriv: global variable not in used " | |
570 | "globs: %q / %s / %q", | |
571 | sRef_unparse (s), | |
572 | ctype_unparse (sRef_getType (s)), | |
573 | sRefSet_unparse (s->deriv))); | |
574 | */ | |
575 | } | |
576 | else | |
577 | { | |
6483a926 | 578 | DPRINTF (("Add deriv: [%p] %s / [%p] %s", |
579 | s, sRef_unparse (s), | |
580 | t, sRef_unparse (t))); | |
581 | ||
616915dd | 582 | s->deriv = sRefSet_insert (s->deriv, t); |
583 | } | |
584 | } | |
585 | } | |
586 | else | |
587 | { | |
28bf4b0b | 588 | DPRINTF (("Add deriv: [%p] %s / [%p] %s", |
589 | s, sRef_unparse (s), | |
590 | t, sRef_unparse (t))); | |
591 | ||
616915dd | 592 | s->deriv = sRefSet_insert (s->deriv, t); |
593 | } | |
594 | } | |
595 | } | |
596 | ||
597 | bool | |
598 | sRef_deepPred (bool (predf) (sRef), sRef s) | |
599 | { | |
6483a926 | 600 | if (sRef_isReasonable (s)) |
616915dd | 601 | { |
602 | if ((*predf)(s)) return TRUE; | |
603 | ||
28bf4b0b | 604 | switch (s->kind) |
616915dd | 605 | { |
606 | case SK_PTR: | |
607 | return (sRef_deepPred (predf, s->info->ref)); | |
608 | case SK_ARRAYFETCH: | |
609 | return (sRef_deepPred (predf, s->info->arrayfetch->arr)); | |
610 | case SK_FIELD: | |
611 | return (sRef_deepPred (predf, s->info->field->rec)); | |
612 | case SK_CONJ: | |
613 | return (sRef_deepPred (predf, s->info->conj->a) | |
614 | || sRef_deepPred (predf, s->info->conj->b)); | |
615 | default: | |
616 | return FALSE; | |
617 | } | |
618 | } | |
619 | ||
620 | return FALSE; | |
621 | } | |
622 | ||
623 | bool sRef_modInFunction (void) | |
624 | { | |
625 | return inFunction; | |
626 | } | |
627 | ||
628 | void sRef_setStateFromType (sRef s, ctype ct) | |
629 | { | |
6483a926 | 630 | if (sRef_isReasonable (s)) |
616915dd | 631 | { |
632 | if (ctype_isUser (ct)) | |
633 | { | |
28bf4b0b | 634 | DPRINTF (("Here we are: %s", sRef_unparseFull (s))); |
616915dd | 635 | sRef_setStateFromUentry |
636 | (s, usymtab_getTypeEntry (ctype_typeId (ct))); | |
637 | } | |
638 | else if (ctype_isAbstract (ct)) | |
639 | { | |
28bf4b0b | 640 | DPRINTF (("Here we are: %s", sRef_unparseFull (s))); |
616915dd | 641 | sRef_setStateFromAbstractUentry |
642 | (s, usymtab_getTypeEntry (ctype_typeId (ct))); | |
643 | } | |
644 | else | |
645 | { | |
646 | ; /* not a user type */ | |
647 | } | |
648 | } | |
649 | } | |
650 | ||
651 | static void sRef_setTypeState (sRef s) | |
652 | { | |
6483a926 | 653 | if (sRef_isReasonable (s)) |
616915dd | 654 | { |
655 | sRef_setStateFromType (s, s->type); | |
656 | } | |
657 | } | |
658 | ||
16c024b5 | 659 | bool sRef_hasAliasInfoLoc (sRef s) |
616915dd | 660 | { |
6483a926 | 661 | return (sRef_isReasonable (s) && (s->aliasinfo != NULL) |
616915dd | 662 | && (fileloc_isDefined (s->aliasinfo->loc))); |
663 | } | |
664 | ||
16c024b5 | 665 | /*@falsewhennull@*/ bool sRef_hasStateInfoLoc (sRef s) |
616915dd | 666 | { |
6483a926 | 667 | return (sRef_isReasonable (s) && (s->definfo != NULL) |
616915dd | 668 | && (fileloc_isDefined (s->definfo->loc))); |
669 | } | |
670 | ||
16c024b5 | 671 | /*@falsewhennull@*/ bool sRef_hasExpInfoLoc (sRef s) |
616915dd | 672 | { |
6483a926 | 673 | return (sRef_isReasonable (s) |
616915dd | 674 | && (s->expinfo != NULL) && (fileloc_isDefined (s->expinfo->loc))); |
675 | } | |
676 | ||
8250fa4a | 677 | # if 0 |
28bf4b0b | 678 | static /*@observer@*/ /*@unused@*/ stateInfo sRef_getInfo (sRef s, cstring key) |
679 | { | |
680 | stateValue sv; | |
681 | ||
6483a926 | 682 | if (!sRef_isReasonable (s)) { |
28bf4b0b | 683 | return stateInfo_undefined; |
684 | } | |
685 | ||
686 | sv = valueTable_lookup (s->state, key); | |
687 | ||
688 | if (stateValue_isDefined (sv)) | |
689 | { | |
690 | return stateValue_getInfo (sv); | |
691 | } | |
692 | ||
693 | return stateInfo_undefined; | |
694 | } | |
8250fa4a | 695 | # endif |
28bf4b0b | 696 | |
616915dd | 697 | static bool |
698 | sRef_hasNullInfoLoc (sRef s) | |
699 | { | |
6483a926 | 700 | return (sRef_isReasonable (s) && s->nullinfo != NULL |
616915dd | 701 | && (fileloc_isDefined (s->nullinfo->loc))); |
702 | } | |
703 | ||
704 | bool | |
705 | sRef_hasAliasInfoRef (sRef s) | |
706 | { | |
6483a926 | 707 | return (sRef_isReasonable (s) && (s->aliasinfo != NULL) |
708 | && (sRef_isReasonable (s->aliasinfo->ref))); | |
616915dd | 709 | } |
710 | ||
711 | static /*@observer@*/ fileloc | |
712 | sRef_getAliasInfoLoc (/*@exposed@*/ sRef s) | |
713 | { | |
6483a926 | 714 | llassert (sRef_isReasonable (s) && s->aliasinfo != NULL |
616915dd | 715 | && (fileloc_isDefined (s->aliasinfo->loc))); |
716 | return (s->aliasinfo->loc); | |
717 | } | |
718 | ||
719 | static /*@observer@*/ fileloc | |
720 | sRef_getStateInfoLoc (/*@exposed@*/ sRef s) | |
721 | { | |
6483a926 | 722 | llassert (sRef_isReasonable (s) && s->definfo != NULL |
616915dd | 723 | && (fileloc_isDefined (s->definfo->loc))); |
724 | return (s->definfo->loc); | |
725 | } | |
726 | ||
727 | static /*@observer@*/ fileloc | |
728 | sRef_getExpInfoLoc (/*@exposed@*/ sRef s) | |
729 | { | |
6483a926 | 730 | llassert (sRef_isReasonable (s) && s->expinfo != NULL |
616915dd | 731 | && (fileloc_isDefined (s->expinfo->loc))); |
732 | return (s->expinfo->loc); | |
733 | } | |
734 | ||
735 | static /*@observer@*/ fileloc | |
736 | sRef_getNullInfoLoc (/*@exposed@*/ sRef s) | |
737 | { | |
6483a926 | 738 | llassert (sRef_isReasonable (s) && s->nullinfo != NULL |
616915dd | 739 | && (fileloc_isDefined (s->nullinfo->loc))); |
740 | return (s->nullinfo->loc); | |
741 | } | |
742 | ||
743 | /*@observer@*/ sRef | |
28bf4b0b | 744 | sRef_getAliasInfoRef (/*@temp@*/ sRef s) |
616915dd | 745 | { |
6483a926 | 746 | llassert (sRef_isReasonable (s) && s->aliasinfo != NULL); |
616915dd | 747 | return (s->aliasinfo->ref); |
748 | } | |
749 | ||
28bf4b0b | 750 | bool sRef_inGlobalScope () |
616915dd | 751 | { |
28bf4b0b | 752 | return !inFunction; |
616915dd | 753 | } |
754 | ||
755 | /* | |
756 | ** This function should be called before new sRefs are created | |
757 | ** somewhere where they will have a lifetime greater than the | |
758 | ** current function scope. | |
759 | */ | |
760 | ||
761 | void sRef_setGlobalScope () | |
762 | { | |
763 | llassert (inFunction); | |
28bf4b0b | 764 | DPRINTF (("leave function")); |
616915dd | 765 | inFunction = FALSE; |
766 | } | |
767 | ||
768 | void sRef_clearGlobalScope () | |
769 | { | |
770 | llassert (!inFunction); | |
28bf4b0b | 771 | DPRINTF (("enter function")); |
616915dd | 772 | inFunction = TRUE; |
773 | } | |
774 | ||
775 | static bool oldInFunction = FALSE; | |
c8dda690 | 776 | static int nestedScope = 0; |
616915dd | 777 | |
778 | void sRef_setGlobalScopeSafe () | |
779 | { | |
c8dda690 | 780 | if (nestedScope == 0) |
781 | { | |
782 | oldInFunction = inFunction; | |
783 | } | |
784 | ||
785 | nestedScope++; | |
786 | DPRINTF (("leave function safe")); | |
616915dd | 787 | inFunction = FALSE; |
788 | } | |
789 | ||
790 | void sRef_clearGlobalScopeSafe () | |
791 | { | |
c8dda690 | 792 | nestedScope--; |
793 | llassert (nestedScope >= 0); | |
794 | ||
795 | if (nestedScope == 0) | |
796 | { | |
797 | inFunction = oldInFunction; | |
798 | } | |
799 | ||
800 | DPRINTF (("clear function: %s", bool_unparse (inFunction))); | |
616915dd | 801 | } |
802 | ||
803 | void sRef_enterFunctionScope () | |
804 | { | |
68de3f33 | 805 | /* evans 2001-09-09 - cleanup if we are in a macro! */ |
806 | if (context_inMacro ()) | |
807 | { | |
808 | if (inFunction) { | |
809 | sRef_exitFunctionScope (); | |
810 | } | |
811 | } | |
812 | ||
616915dd | 813 | llassert (!inFunction); |
814 | llassert (sRefTable_isEmpty (allRefs)); | |
815 | inFunction = TRUE; | |
28bf4b0b | 816 | DPRINTF (("enter function")); |
616915dd | 817 | } |
818 | ||
819 | void sRef_exitFunctionScope () | |
c8dda690 | 820 | { |
616915dd | 821 | if (inFunction) |
822 | { | |
28bf4b0b | 823 | DPRINTF (("Exit function scope.")); |
616915dd | 824 | sRefTable_clear (allRefs); |
6483a926 | 825 | DPRINTF (("Exit function scope done.")); |
616915dd | 826 | inFunction = FALSE; |
827 | } | |
828 | else | |
829 | { | |
830 | llbuglit ("sRef_exitFunctionScope: not in function"); | |
831 | } | |
832 | } | |
833 | ||
834 | void sRef_destroyMod () /*@globals killed allRefs;@*/ | |
835 | { | |
836 | # ifdef DEBUGREFS | |
837 | llmsg (message ("Live: %d / %d ", nsrefs, totnsrefs)); | |
838 | # endif | |
839 | ||
840 | sRefTable_free (allRefs); | |
841 | } | |
842 | ||
616915dd | 843 | |
844 | static /*@notnull@*/ /*@exposed@*/ sRef | |
845 | sRef_fixConj (/*@notnull@*/ sRef s) | |
846 | { | |
847 | if (sRef_isConj (s)) | |
848 | { | |
849 | do { | |
850 | s = sRef_getConjA (s); | |
851 | } while (sRef_isConj (s)); | |
852 | ||
6483a926 | 853 | llassert (sRef_isReasonable (s)); |
616915dd | 854 | return s; /* don't need to ref */ |
855 | } | |
856 | else | |
857 | { | |
858 | return s; | |
859 | } | |
860 | } | |
861 | ||
862 | static bool | |
863 | sRef_isExternallyVisibleAux (sRef s) | |
864 | { | |
865 | bool res = FALSE; | |
866 | sRef base = sRef_getRootBase (s); | |
867 | ||
6483a926 | 868 | if (sRef_isReasonable (base)) |
616915dd | 869 | { |
28bf4b0b | 870 | res = sRef_isParam (base) || sRef_isFileOrGlobalScope (base) || sRef_isExternal (base); |
616915dd | 871 | } |
872 | ||
873 | return res; | |
874 | } | |
875 | ||
876 | bool | |
877 | sRef_isExternallyVisible (sRef s) | |
878 | { | |
879 | return (sRef_aliasCheckSimplePred (sRef_isExternallyVisibleAux, s)); | |
880 | } | |
881 | ||
882 | /*@exposed@*/ uentry | |
883 | sRef_getBaseUentry (sRef s) | |
884 | { | |
885 | sRef base = sRef_getRootBase (s); | |
886 | uentry res = uentry_undefined; | |
887 | ||
6483a926 | 888 | if (sRef_isReasonable (base)) |
616915dd | 889 | { |
890 | switch (base->kind) | |
891 | { | |
892 | case SK_PARAM: | |
b73d1009 | 893 | res = usymtab_getRefQuiet (paramsScope, usymId_fromInt (base->info->paramno)); |
616915dd | 894 | break; |
895 | ||
896 | case SK_CVAR: | |
897 | res = usymtab_getRefQuiet (base->info->cvar->lexlevel, | |
898 | base->info->cvar->index); | |
899 | break; | |
900 | ||
901 | default: | |
902 | break; | |
903 | } | |
904 | } | |
905 | ||
906 | return res; | |
907 | } | |
908 | ||
909 | /* | |
910 | ** lookup the current uentry corresponding to s, and return the corresponding sRef. | |
911 | ** yuk yuk yuk yuk yuk yuk yuk yuk | |
912 | */ | |
913 | ||
914 | /*@exposed@*/ sRef | |
915 | sRef_updateSref (sRef s) | |
916 | { | |
917 | sRef inner; | |
918 | sRef ret; | |
919 | sRef res; | |
920 | ||
6483a926 | 921 | if (!sRef_isReasonable (s)) return sRef_undefined; |
616915dd | 922 | |
923 | switch (s->kind) | |
924 | { | |
925 | case SK_UNKNOWN: | |
926 | case SK_OBJECT: | |
927 | case SK_NEW: | |
928 | case SK_TYPE: | |
616915dd | 929 | case SK_DERIVED: |
930 | case SK_UNCONSTRAINED: | |
931 | case SK_CONST: | |
932 | case SK_SPECIAL: | |
933 | case SK_RESULT: | |
934 | return s; | |
28bf4b0b | 935 | case SK_EXTERNAL: |
936 | { | |
937 | sRef r = sRef_updateSref (s->info->ref); | |
938 | ||
939 | if (r != s->info->ref) | |
940 | { | |
941 | return sRef_makeExternal (r); | |
942 | } | |
943 | else | |
944 | { | |
945 | return s; | |
946 | } | |
947 | } | |
616915dd | 948 | case SK_PARAM: |
949 | case SK_CVAR: | |
950 | { | |
951 | uentry ue = sRef_getUentry (s); | |
952 | ||
953 | /* must be raw name! (need the marker) */ | |
909cf5eb | 954 | /* Must be in the correct scope! */ |
955 | ||
956 | ue = usymtab_lookupSafeScope (uentry_rawName (ue), sRef_lexLevel (s)); | |
616915dd | 957 | |
958 | if (uentry_isUndefined (ue)) | |
959 | { | |
28bf4b0b | 960 | return s; |
616915dd | 961 | } |
962 | else | |
963 | { | |
28bf4b0b | 964 | DPRINTF (("Update sref: %s", uentry_unparseFull (ue))); |
965 | return (uentry_getSref (ue)); | |
616915dd | 966 | } |
967 | } | |
968 | case SK_ARRAYFETCH: | |
969 | /* special case if ind known */ | |
970 | inner = s->info->arrayfetch->arr; | |
971 | ret = sRef_updateSref (inner); | |
972 | ||
973 | if (ret == inner) | |
974 | { | |
975 | res = s; | |
976 | } | |
977 | else | |
978 | { | |
979 | res = sRef_makeArrayFetch (ret); | |
980 | } | |
981 | ||
982 | return res; | |
983 | ||
984 | case SK_FIELD: | |
985 | inner = s->info->field->rec; | |
986 | ret = sRef_updateSref (inner); | |
987 | ||
988 | if (ret == inner) | |
989 | { | |
990 | res = s; | |
991 | } | |
992 | else | |
993 | { | |
994 | res = (sRef_makeField (ret, s->info->field->field)); | |
995 | } | |
996 | ||
997 | return (res); | |
998 | case SK_PTR: | |
999 | inner = s->info->ref; | |
1000 | ret = sRef_updateSref (inner); | |
1001 | if (ret == inner) | |
1002 | { | |
1003 | res = s; | |
1004 | } | |
1005 | else | |
1006 | { | |
1007 | res = sRef_makePointer (ret); | |
1008 | } | |
1009 | ||
1010 | return (res); | |
1011 | ||
1012 | case SK_ADR: | |
1013 | inner = s->info->ref; | |
1014 | ret = sRef_updateSref (inner); | |
1015 | ||
1016 | if (ret == inner) | |
1017 | { | |
1018 | res = s; | |
1019 | } | |
1020 | else | |
1021 | { | |
1022 | res = sRef_makeAddress (ret); | |
1023 | } | |
1024 | ||
1025 | return (res); | |
1026 | ||
1027 | case SK_CONJ: | |
1028 | { | |
1029 | sRef innera = s->info->conj->a; | |
1030 | sRef innerb = s->info->conj->b; | |
1031 | sRef reta = sRef_updateSref (innera); | |
1032 | sRef retb = sRef_updateSref (innerb); | |
1033 | ||
1034 | if (innera == reta && innerb == retb) | |
1035 | { | |
1036 | res = s; | |
1037 | } | |
1038 | else | |
1039 | { | |
1040 | res = sRef_makeConj (reta, retb); | |
1041 | } | |
1042 | ||
1043 | return (res); | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | BADEXIT; | |
1048 | } | |
1049 | ||
1050 | uentry | |
1051 | sRef_getUentry (sRef s) | |
1052 | { | |
6483a926 | 1053 | llassert (sRef_isReasonable (s)); |
616915dd | 1054 | |
1055 | switch (s->kind) | |
1056 | { | |
1057 | case SK_PARAM: | |
b73d1009 | 1058 | return (usymtab_getRefQuiet (paramsScope, usymId_fromInt (s->info->paramno))); |
616915dd | 1059 | case SK_CVAR: |
1060 | return (usymtab_getRefQuiet (s->info->cvar->lexlevel, s->info->cvar->index)); | |
1061 | case SK_CONJ: | |
1062 | { | |
1063 | if (sRef_isCvar (s->info->conj->a) || sRef_isParam (s->info->conj->a) | |
1064 | || sRef_isConj (s->info->conj->a)) | |
1065 | { | |
1066 | return sRef_getUentry (s->info->conj->a); | |
1067 | } | |
1068 | else | |
1069 | { | |
1070 | return sRef_getUentry (s->info->conj->b); | |
1071 | } | |
1072 | } | |
6fcd0b1e | 1073 | case SK_FIELD: /* evans 2002-07-17: added case for SK_FIELD */ |
616915dd | 1074 | case SK_UNKNOWN: |
1075 | case SK_SPECIAL: | |
1076 | return uentry_undefined; | |
1077 | BADDEFAULT; | |
1078 | } | |
1079 | } | |
1080 | ||
51bc6ecc | 1081 | int |
616915dd | 1082 | sRef_getParam (sRef s) |
1083 | { | |
6483a926 | 1084 | llassert (sRef_isReasonable (s)); |
616915dd | 1085 | llassert (s->kind == SK_PARAM); |
1086 | ||
51bc6ecc | 1087 | return s->info->paramno; |
616915dd | 1088 | } |
1089 | ||
1090 | bool | |
1091 | sRef_isModified (sRef s) | |
1092 | { | |
6483a926 | 1093 | return (!sRef_isReasonable (s) || s->modified); |
616915dd | 1094 | } |
1095 | ||
1096 | void sRef_setModified (sRef s) | |
1097 | { | |
6483a926 | 1098 | if (sRef_isReasonable (s)) |
616915dd | 1099 | { |
1100 | s->modified = TRUE; | |
1101 | ||
1102 | ||
1103 | if (sRef_isRefsField (s)) | |
1104 | { | |
1105 | sRef base = sRef_getBase (s); | |
28bf4b0b | 1106 | |
616915dd | 1107 | llassert (s->kind == SK_FIELD); |
28bf4b0b | 1108 | |
616915dd | 1109 | if (sRef_isPointer (base)) |
1110 | { | |
1111 | base = sRef_getBase (base); | |
28bf4b0b | 1112 | } |
1113 | ||
616915dd | 1114 | if (sRef_isRefCounted (base)) |
1115 | { | |
1116 | base->aliaskind = AK_NEWREF; | |
28bf4b0b | 1117 | } |
616915dd | 1118 | } |
28bf4b0b | 1119 | } |
616915dd | 1120 | } |
1121 | ||
1122 | /* | |
1123 | ** note: this side-effects sRefSet to set modified to TRUE | |
1124 | ** for any sRef similar to s. | |
1125 | */ | |
1126 | ||
1127 | bool | |
1128 | sRef_canModifyVal (sRef s, sRefSet sl) | |
1129 | { | |
1130 | if (context_getFlag (FLG_MUSTMOD)) | |
1131 | { | |
1132 | return (sRef_doModifyVal (s, sl)); | |
1133 | } | |
1134 | else | |
1135 | { | |
1136 | return (sRef_checkModifyVal (s, sl)); | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | bool | |
1141 | sRef_canModify (sRef s, sRefSet sl) | |
1142 | { | |
616915dd | 1143 | if (context_getFlag (FLG_MUSTMOD)) |
1144 | { | |
1145 | return (sRef_doModify (s, sl)); | |
1146 | } | |
1147 | else | |
1148 | { | |
1149 | return (sRef_checkModify (s, sl)); | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | /* | |
1154 | ** No side-effects | |
1155 | */ | |
1156 | ||
1157 | static | |
1158 | bool sRef_checkModifyVal (sRef s, sRefSet sl) | |
1159 | { | |
28bf4b0b | 1160 | DPRINTF (("Check modify val: %s", sRef_unparse (s))); |
1161 | ||
616915dd | 1162 | if (sRef_isInvalid (s)) |
1163 | { | |
1164 | return TRUE; | |
1165 | } | |
1166 | ||
1167 | switch (s->kind) | |
1168 | { | |
1169 | case SK_UNCONSTRAINED: | |
1170 | case SK_CONST: | |
1171 | return TRUE; | |
1172 | case SK_CVAR: | |
28bf4b0b | 1173 | DPRINTF (("Modify var: %s", sRef_unparse (s))); |
1174 | ||
1175 | if (sRef_isFileOrGlobalScope (s)) | |
616915dd | 1176 | { |
1177 | if (context_checkGlobMod (s)) | |
1178 | { | |
1179 | return (sRefSet_member (sl, s)); | |
1180 | } | |
1181 | ||
1182 | return TRUE; | |
1183 | } | |
1184 | else | |
1185 | { | |
1186 | return TRUE; | |
1187 | } | |
1188 | case SK_PARAM: | |
1189 | return (sRefSet_member (sl, s) | |
1190 | || alkind_isOnly (sRef_getOrigAliasKind (s))); | |
1191 | case SK_ARRAYFETCH: | |
1192 | /* special case if ind known */ | |
1193 | return (sRefSet_member (sl, s) || | |
1194 | sRef_checkModifyVal (s->info->arrayfetch->arr, sl)); | |
1195 | case SK_FIELD: | |
1196 | return (sRefSet_member (sl, s) || sRef_checkModifyVal (s->info->field->rec, sl)); | |
1197 | case SK_PTR: | |
1198 | return (sRefSet_member (sl, s) || sRef_checkModifyVal (s->info->ref, sl)); | |
1199 | case SK_ADR: | |
1200 | return (sRefSet_member (sl, s) || sRef_checkModifyVal (s->info->ref, sl)); | |
1201 | case SK_CONJ: | |
1202 | return ((sRef_checkModifyVal (s->info->conj->a, sl)) && | |
1203 | (sRef_checkModifyVal (s->info->conj->b, sl))); | |
1204 | case SK_UNKNOWN: | |
1205 | case SK_OBJECT: | |
1206 | case SK_NEW: | |
1207 | case SK_TYPE: | |
1208 | case SK_DERIVED: | |
1209 | return TRUE; | |
1210 | case SK_EXTERNAL: | |
1211 | return TRUE; | |
1212 | case SK_SPECIAL: | |
1213 | { | |
1214 | switch (s->info->spec) | |
1215 | { | |
1216 | case SR_NOTHING: return TRUE; | |
1217 | case SR_INTERNAL: | |
1218 | if (context_getFlag (FLG_INTERNALGLOBS)) | |
1219 | { | |
1220 | return (sRefSet_member (sl, s)); | |
1221 | } | |
1222 | else | |
1223 | { | |
1224 | return TRUE; | |
1225 | } | |
1226 | case SR_SPECSTATE: return TRUE; | |
1227 | case SR_SYSTEM: return (sRefSet_member (sl, s)); | |
28bf4b0b | 1228 | case SR_GLOBALMARKER: BADBRANCH; |
616915dd | 1229 | } |
1230 | } | |
1231 | case SK_RESULT: BADBRANCH; | |
1232 | } | |
1233 | BADEXIT; | |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | ** this should probably be elsewhere... | |
1238 | ** | |
1239 | ** returns TRUE iff sl indicates that s can be modified | |
1240 | */ | |
1241 | ||
1242 | static bool sRef_checkModify (sRef s, sRefSet sl) | |
1243 | { | |
6483a926 | 1244 | llassert (sRef_isReasonable (s)); |
616915dd | 1245 | |
1246 | switch (s->kind) | |
1247 | { | |
1248 | case SK_UNCONSTRAINED: | |
1249 | case SK_CONST: | |
1250 | return TRUE; | |
1251 | case SK_CVAR: | |
28bf4b0b | 1252 | if (sRef_isFileOrGlobalScope (s)) |
616915dd | 1253 | { |
1254 | if (context_checkGlobMod (s)) | |
1255 | { | |
1256 | return (sRefSet_member (sl, s)); | |
1257 | } | |
1258 | ||
1259 | return TRUE; | |
1260 | } | |
1261 | else | |
1262 | { | |
1263 | return TRUE; | |
1264 | } | |
1265 | case SK_PARAM: | |
1266 | return TRUE; | |
1267 | case SK_ARRAYFETCH: | |
1268 | return (sRefSet_member (sl, s) || | |
1269 | sRef_checkModifyVal (s->info->arrayfetch->arr, sl)); | |
1270 | case SK_FIELD: | |
1271 | { | |
1272 | sRef sr = s->info->field->rec; | |
1273 | ||
1274 | if (sr->kind == SK_PARAM) | |
1275 | return TRUE; /* structs are copied on call */ | |
1276 | ||
1277 | return (sRefSet_member (sl, s) || sRef_checkModifyVal (s->info->field->rec, sl)); | |
1278 | } | |
1279 | case SK_PTR: | |
1280 | { | |
1281 | bool sm; | |
1282 | ||
1283 | sm = sRefSet_member (sl, s); | |
1284 | ||
1285 | if (sm) | |
1286 | return TRUE; | |
1287 | else | |
1288 | return (sRef_checkModifyVal (s->info->ref, sl)); | |
1289 | } | |
1290 | case SK_ADR: | |
1291 | return (sRefSet_member (sl, s) || sRef_checkModifyVal (s->info->ref, sl)); | |
1292 | case SK_CONJ: | |
1293 | return ((sRef_checkModify (s->info->conj->a, sl)) && | |
1294 | (sRef_checkModify (s->info->conj->b, sl))); | |
1295 | case SK_NEW: | |
1296 | case SK_OBJECT: | |
1297 | case SK_UNKNOWN: | |
1298 | case SK_TYPE: | |
1299 | case SK_DERIVED: | |
1300 | case SK_EXTERNAL: | |
1301 | return TRUE; | |
1302 | case SK_SPECIAL: | |
1303 | { | |
1304 | switch (s->info->spec) | |
1305 | { | |
1306 | case SR_NOTHING: return TRUE; | |
1307 | case SR_INTERNAL: | |
1308 | if (context_getFlag (FLG_INTERNALGLOBS)) | |
1309 | { | |
1310 | return (sRefSet_member (sl, s)); | |
1311 | } | |
1312 | else | |
1313 | { | |
1314 | return TRUE; | |
1315 | } | |
1316 | case SR_SPECSTATE: return TRUE; | |
1317 | case SR_SYSTEM: return (sRefSet_member (sl, s)); | |
28bf4b0b | 1318 | case SR_GLOBALMARKER: BADBRANCH; |
616915dd | 1319 | } |
1320 | } | |
1321 | case SK_RESULT: BADBRANCH; | |
1322 | } | |
1323 | BADEXIT; | |
1324 | } | |
1325 | ||
1326 | cstring sRef_stateVerb (sRef s) | |
1327 | { | |
1328 | if (sRef_isDead (s)) | |
1329 | { | |
1330 | return cstring_makeLiteralTemp ("released"); | |
1331 | } | |
1332 | else if (sRef_isKept (s)) | |
1333 | { | |
1334 | return cstring_makeLiteralTemp ("kept"); | |
1335 | } | |
1336 | else if (sRef_isDependent (s)) | |
1337 | { | |
1338 | return cstring_makeLiteralTemp ("dependent"); | |
1339 | } | |
1340 | else | |
1341 | { | |
1342 | BADEXIT; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | cstring sRef_stateAltVerb (sRef s) | |
1347 | { | |
1348 | if (sRef_isDead (s)) | |
1349 | { | |
1350 | return cstring_makeLiteralTemp ("live"); | |
1351 | } | |
1352 | else if (sRef_isKept (s)) | |
1353 | { | |
1354 | return cstring_makeLiteralTemp ("not kept"); | |
1355 | } | |
1356 | else if (sRef_isDependent (s)) | |
1357 | { | |
1358 | return cstring_makeLiteralTemp ("independent"); | |
1359 | } | |
1360 | else | |
1361 | { | |
1362 | BADEXIT; | |
1363 | } | |
1364 | } | |
1365 | ||
1366 | static | |
1367 | bool sRef_doModifyVal (sRef s, sRefSet sl) | |
1368 | { | |
6483a926 | 1369 | llassert (sRef_isReasonable (s)); |
616915dd | 1370 | |
1371 | ||
1372 | switch (s->kind) | |
1373 | { | |
1374 | case SK_UNCONSTRAINED: | |
1375 | case SK_CONST: | |
1376 | return TRUE; | |
1377 | case SK_CVAR: | |
28bf4b0b | 1378 | if (sRef_isFileOrGlobalScope (s)) |
616915dd | 1379 | { |
1380 | ||
1381 | if (context_checkGlobMod (s)) | |
1382 | { | |
1383 | return (sRefSet_modifyMember (sl, s)); | |
1384 | } | |
1385 | else | |
1386 | { | |
1387 | (void) sRefSet_modifyMember (sl, s); | |
1388 | } | |
1389 | ||
1390 | return TRUE; | |
1391 | } | |
1392 | else | |
1393 | { | |
1394 | return TRUE; | |
1395 | } | |
1396 | case SK_PARAM: | |
1397 | return (sRefSet_modifyMember (sl, s) | |
1398 | || alkind_isOnly (sRef_getOrigAliasKind (s))); | |
1399 | case SK_ARRAYFETCH: | |
1400 | /* special case if ind known */ | |
1401 | /* unconditional OR, need side effect */ | |
1402 | return (OR (sRefSet_modifyMember (sl, s), | |
1403 | sRef_doModifyVal (s->info->arrayfetch->arr, sl))); | |
1404 | case SK_FIELD: | |
1405 | return (OR (sRefSet_modifyMember (sl, s), | |
1406 | sRef_doModifyVal (s->info->field->rec, sl))); | |
1407 | case SK_PTR: | |
1408 | return (OR (sRefSet_modifyMember (sl, s), | |
1409 | sRef_doModifyVal (s->info->ref, sl))); | |
1410 | case SK_ADR: | |
1411 | return (OR (sRefSet_modifyMember (sl, s), | |
1412 | sRef_doModifyVal (s->info->ref, sl))); | |
1413 | case SK_CONJ: | |
1414 | return (AND (sRef_doModifyVal (s->info->conj->a, sl) , | |
1415 | sRef_doModifyVal (s->info->conj->b, sl))); | |
1416 | case SK_OBJECT: | |
1417 | case SK_DERIVED: | |
1418 | case SK_EXTERNAL: | |
1419 | case SK_UNKNOWN: | |
1420 | case SK_NEW: | |
1421 | case SK_TYPE: | |
1422 | return TRUE; | |
1423 | case SK_SPECIAL: | |
1424 | { | |
1425 | switch (s->info->spec) | |
1426 | { | |
1427 | case SR_NOTHING: return TRUE; | |
1428 | case SR_INTERNAL: | |
1429 | if (context_getFlag (FLG_INTERNALGLOBS)) | |
1430 | { | |
1431 | return (sRefSet_modifyMember (sl, s)); | |
1432 | } | |
1433 | else | |
1434 | { | |
1435 | (void) sRefSet_modifyMember (sl, s); | |
1436 | return TRUE; | |
1437 | } | |
28bf4b0b | 1438 | case SR_SPECSTATE: return TRUE; |
1439 | case SR_SYSTEM: return (sRefSet_modifyMember (sl, s)); | |
1440 | case SR_GLOBALMARKER: BADBRANCH; | |
1441 | ||
616915dd | 1442 | } |
1443 | } | |
1444 | case SK_RESULT: BADBRANCH; | |
1445 | } | |
1446 | BADEXIT; | |
1447 | } | |
1448 | ||
1449 | /* | |
1450 | ** this should probably be elsewhere... | |
1451 | ** | |
1452 | ** returns TRUE iff sl indicates that s can be modified | |
1453 | */ | |
1454 | ||
1455 | static | |
1456 | bool sRef_doModify (sRef s, sRefSet sl) | |
1457 | { | |
6483a926 | 1458 | llassert (sRef_isReasonable (s)); |
616915dd | 1459 | |
1460 | switch (s->kind) | |
1461 | { | |
1462 | case SK_UNCONSTRAINED: | |
1463 | case SK_CONST: | |
1464 | return TRUE; | |
1465 | case SK_CVAR: | |
28bf4b0b | 1466 | if (sRef_isFileOrGlobalScope (s)) |
616915dd | 1467 | { |
1468 | if (context_checkGlobMod (s)) | |
1469 | { | |
1470 | return (sRefSet_modifyMember (sl, s)); | |
1471 | } | |
1472 | else | |
1473 | { | |
1474 | (void) sRefSet_modifyMember (sl, s); | |
1475 | } | |
1476 | ||
1477 | return TRUE; | |
1478 | } | |
1479 | else | |
1480 | { | |
1481 | return TRUE; | |
1482 | } | |
1483 | case SK_PARAM: | |
1484 | return TRUE; | |
1485 | case SK_ARRAYFETCH: | |
1486 | return (OR (sRefSet_modifyMember (sl, s), | |
1487 | sRef_doModifyVal (s->info->arrayfetch->arr, sl))); | |
1488 | case SK_FIELD: | |
1489 | { | |
1490 | sRef sr = s->info->field->rec; | |
1491 | ||
1492 | if (sr->kind == SK_PARAM) | |
1493 | { | |
1494 | return TRUE; /* structs are shallow-copied on call */ | |
1495 | } | |
1496 | ||
1497 | return (OR (sRefSet_modifyMember (sl, s), | |
1498 | sRef_doModifyVal (s->info->field->rec, sl))); | |
1499 | } | |
1500 | case SK_PTR: | |
1501 | { | |
1502 | return (OR (sRefSet_modifyMember (sl, s), | |
1503 | sRef_doModifyVal (s->info->ref, sl))); | |
1504 | } | |
1505 | case SK_ADR: | |
1506 | return (OR (sRefSet_modifyMember (sl, s), | |
1507 | sRef_doModifyVal (s->info->ref, sl))); | |
1508 | case SK_CONJ: | |
1509 | return (AND (sRef_doModify (s->info->conj->a, sl), | |
1510 | (sRef_doModify (s->info->conj->b, sl)))); | |
1511 | case SK_UNKNOWN: | |
1512 | case SK_NEW: | |
1513 | case SK_TYPE: | |
1514 | return TRUE; | |
1515 | case SK_OBJECT: | |
1516 | case SK_DERIVED: | |
1517 | case SK_EXTERNAL: | |
1518 | return TRUE; | |
1519 | case SK_SPECIAL: | |
1520 | { | |
1521 | switch (s->info->spec) | |
1522 | { | |
1523 | case SR_NOTHING: return TRUE; | |
1524 | case SR_INTERNAL: return TRUE; | |
1525 | case SR_SPECSTATE: return TRUE; | |
1526 | case SR_SYSTEM: return (sRefSet_modifyMember (sl, s)); | |
28bf4b0b | 1527 | case SR_GLOBALMARKER: BADBRANCH; |
616915dd | 1528 | } |
1529 | } | |
1530 | case SK_RESULT: BADBRANCH; | |
1531 | } | |
1532 | BADEXIT; | |
1533 | } | |
1534 | ||
1535 | static /*@exposed@*/ sRef | |
1536 | sRef_leastCommon (/*@exposed@*/ sRef s1, sRef s2) | |
1537 | { | |
1538 | llassert (sRef_similar (s1, s2)); | |
1539 | ||
6483a926 | 1540 | if (!sRef_isReasonable (s1)) return s1; |
1541 | if (!sRef_isReasonable (s2)) return s1; | |
616915dd | 1542 | |
1543 | sRef_combineDefState (s1, s2); | |
1544 | sRef_combineNullState (s1, s2); | |
1545 | sRef_combineExKinds (s1, s2); | |
1546 | ||
1547 | if (s1->aliaskind != s2->aliaskind) | |
1548 | { | |
1549 | if (s1->aliaskind == AK_UNKNOWN) | |
1550 | { | |
1551 | s1->aliaskind = s2->aliaskind; | |
1552 | } | |
1553 | else if (s2->aliaskind == AK_UNKNOWN) | |
1554 | { | |
1555 | ; | |
1556 | } | |
1557 | else | |
1558 | { | |
1559 | s1->aliaskind = AK_ERROR; | |
1560 | } | |
1561 | } | |
1562 | ||
1563 | return s1; | |
1564 | } | |
1565 | ||
1566 | int sRef_compare (sRef s1, sRef s2) | |
1567 | { | |
1568 | if (s1 == s2) return 0; | |
1569 | ||
1570 | if (sRef_isInvalid (s1)) return -1; | |
1571 | if (sRef_isInvalid (s2)) return 1; | |
1572 | ||
1573 | INTCOMPARERETURN (s1->kind, s2->kind); | |
1574 | INTCOMPARERETURN (s1->defstate, s2->defstate); | |
1575 | INTCOMPARERETURN (s1->aliaskind, s2->aliaskind); | |
1576 | ||
28bf4b0b | 1577 | DPRINTF (("Compare null state: %s / %s", |
1578 | sRef_unparseFull (s1), | |
1579 | sRef_unparseFull (s2))); | |
1580 | ||
1581 | COMPARERETURN (nstate_compare (sRef_getNullState (s1), | |
1582 | sRef_getNullState (s2))); | |
616915dd | 1583 | |
1584 | switch (s1->kind) | |
1585 | { | |
1586 | case SK_PARAM: | |
1587 | return (int_compare (s1->info->paramno, s2->info->paramno)); | |
1588 | case SK_ARRAYFETCH: | |
1589 | { | |
1590 | COMPARERETURN (sRef_compare (s1->info->arrayfetch->arr, | |
1591 | s2->info->arrayfetch->arr)); | |
1592 | ||
1593 | if (s1->info->arrayfetch->indknown && s2->info->arrayfetch->indknown) | |
1594 | { | |
1595 | return (int_compare (s1->info->arrayfetch->ind, | |
1596 | s2->info->arrayfetch->ind)); | |
1597 | } | |
1598 | if (!s1->info->arrayfetch->indknown && !s2->info->arrayfetch->indknown) | |
1599 | return 0; | |
1600 | ||
1601 | return 1; | |
1602 | } | |
1603 | case SK_FIELD: | |
1604 | { | |
1605 | COMPARERETURN (sRef_compare (s1->info->field->rec, s2->info->field->rec)); | |
1606 | ||
1607 | if (cstring_equal (s1->info->field->field, s2->info->field->field)) | |
1608 | return 0; | |
1609 | ||
1610 | return 1; | |
1611 | } | |
1612 | case SK_PTR: | |
1613 | case SK_ADR: | |
1614 | return (sRef_compare (s1->info->ref, s2->info->ref)); | |
1615 | case SK_CONJ: | |
1616 | COMPARERETURN (sRef_compare (s1->info->conj->a, s2->info->conj->a)); | |
1617 | return (sRef_compare (s1->info->conj->b, s2->info->conj->b)); | |
1618 | case SK_UNCONSTRAINED: | |
1619 | return (cstring_compare (s1->info->fname, s2->info->fname)); | |
1620 | case SK_NEW: | |
1621 | case SK_CVAR: | |
1622 | case SK_UNKNOWN: | |
1623 | case SK_OBJECT: | |
1624 | case SK_TYPE: | |
1625 | case SK_DERIVED: | |
1626 | case SK_EXTERNAL: | |
1627 | case SK_CONST: | |
1628 | case SK_RESULT: | |
1629 | return 0; | |
1630 | case SK_SPECIAL: | |
1631 | return (generic_compare (s1->info->spec, s2->info->spec)); | |
1632 | } | |
1633 | BADEXIT; | |
1634 | } | |
1635 | ||
1636 | static bool cref_equal (cref c1, cref c2) | |
1637 | { | |
1638 | return ((c1->lexlevel == c2->lexlevel) && | |
1639 | (usymId_equal (c1->index, c2->index))); | |
1640 | } | |
1641 | ||
1642 | /* | |
1643 | ** returns true if s1 could be the same storage as s2. | |
1644 | ** i.e., a[?] ~ a[3]. Note its not symmetric ... s1 | |
1645 | ** should be more specific. | |
1646 | */ | |
1647 | ||
1648 | /* | |
1649 | ** like similar, but matches objects <-> non-objects | |
1650 | */ | |
1651 | ||
1652 | static bool | |
1653 | sRef_uniqueReference (sRef s) | |
1654 | { | |
1655 | return (sRef_isFresh (s) || sRef_isUnique (s) | |
1656 | || sRef_isOnly (s) || sRef_isStack (s) | |
1657 | || sRef_isAddress (s)); | |
1658 | } | |
1659 | ||
1660 | static bool | |
1661 | sRef_similarRelaxedAux (sRef s1, sRef s2) | |
1662 | { | |
1663 | if (s1 == s2) | |
1664 | { | |
1665 | if (sRef_isUnknownArrayFetch (s1)) | |
1666 | { | |
1667 | return FALSE; | |
1668 | } | |
1669 | else | |
1670 | { | |
1671 | return TRUE; | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | if (sRef_isInvalid (s1) || sRef_isInvalid (s2)) return FALSE; | |
1676 | ||
1677 | if (sRef_isConj (s2)) | |
1678 | return (sRef_similarRelaxedAux (s1, sRef_getConjA (s2)) || | |
1679 | sRef_similarRelaxedAux (s1, sRef_getConjB (s2))); | |
1680 | ||
1681 | switch (s1->kind) | |
1682 | { | |
1683 | case SK_CVAR: | |
1684 | return ((s2->kind == SK_CVAR) | |
1685 | && (cref_equal (s1->info->cvar, s2->info->cvar))); | |
1686 | case SK_PARAM: | |
1687 | return ((s2->kind == SK_PARAM) | |
1688 | && (s1->info->paramno == s2->info->paramno)); | |
1689 | case SK_ARRAYFETCH: | |
1690 | if (s2->kind == SK_ARRAYFETCH) | |
1691 | { | |
1692 | if (sRef_similarRelaxedAux (s1->info->arrayfetch->arr, | |
1693 | s2->info->arrayfetch->arr)) | |
1694 | { | |
1695 | if (s1->info->arrayfetch->indknown) | |
1696 | { | |
1697 | if (s2->info->arrayfetch->indknown) | |
1698 | { | |
1699 | return (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind); | |
1700 | } | |
1701 | else | |
1702 | { | |
1703 | return FALSE; | |
1704 | } | |
1705 | } | |
1706 | else | |
1707 | { | |
1708 | return FALSE; | |
1709 | } | |
1710 | } | |
1711 | } | |
1712 | return FALSE; | |
1713 | case SK_FIELD: | |
1714 | return ((s2->kind == SK_FIELD | |
1715 | && (sRef_similarRelaxedAux (s1->info->field->rec, | |
1716 | s2->info->field->rec) | |
1717 | && cstring_equal (s1->info->field->field, | |
1718 | s2->info->field->field)))); | |
1719 | case SK_PTR: | |
1720 | return ((s2->kind == SK_PTR) | |
1721 | && sRef_similarRelaxedAux (s1->info->ref, s2->info->ref)); | |
1722 | case SK_ADR: | |
1723 | return ((s2->kind == SK_ADR) | |
1724 | && sRef_similarRelaxedAux (s1->info->ref, s2->info->ref)); | |
1725 | case SK_CONJ: | |
1726 | return ((sRef_similarRelaxedAux (s1->info->conj->a, s2) || | |
1727 | (sRef_similarRelaxedAux (s1->info->conj->b, s2)))); | |
1728 | case SK_SPECIAL: | |
1729 | return (s1->info->spec == s2->info->spec); | |
1730 | case SK_UNCONSTRAINED: | |
1731 | return (cstring_equal (s1->info->fname, s2->info->fname)); | |
1732 | case SK_DERIVED: | |
1733 | case SK_CONST: | |
1734 | case SK_TYPE: | |
1735 | case SK_NEW: | |
1736 | case SK_UNKNOWN: | |
1737 | case SK_OBJECT: | |
1738 | case SK_EXTERNAL: | |
1739 | case SK_RESULT: | |
1740 | return FALSE; | |
1741 | } | |
1742 | BADEXIT; | |
1743 | } | |
1744 | ||
1745 | bool | |
1746 | sRef_similarRelaxed (sRef s1, sRef s2) | |
1747 | { | |
1748 | bool us1, us2; | |
1749 | ||
1750 | if (s1 == s2) | |
1751 | { | |
1752 | if (sRef_isThroughArrayFetch (s1)) | |
1753 | { | |
1754 | return FALSE; | |
1755 | } | |
1756 | else | |
1757 | { | |
1758 | return TRUE; | |
1759 | } | |
1760 | } | |
1761 | ||
1762 | if (sRef_isInvalid (s1) || sRef_isInvalid (s2)) return FALSE; | |
1763 | ||
1764 | us1 = sRef_uniqueReference (s1); | |
1765 | us2 = sRef_uniqueReference (s2); | |
1766 | ||
1767 | if ((s1->kind == SK_EXTERNAL && (s2->kind != SK_EXTERNAL && !us2)) | |
1768 | || (s2->kind == SK_EXTERNAL && (s1->kind != SK_EXTERNAL && !us1))) | |
1769 | { | |
1770 | /* | |
1771 | ** Previously, also: | |
1772 | ** || (sRef_isExposed (s1) && !us2) || (sRef_isExposed (s2) && !us1)) ???? | |
1773 | ** | |
1774 | ** No clue why this was there?! | |
1775 | */ | |
1776 | ||
1777 | ||
1778 | if (sRef_isExposed (s1) && sRef_isCvar (s1)) | |
1779 | { | |
1780 | uentry ue1 = sRef_getUentry (s1); | |
1781 | ||
1782 | if (uentry_isRefParam (ue1)) | |
1783 | { | |
1784 | return sRef_similarRelaxedAux (s1, s2); | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | if (sRef_isExposed (s2) && sRef_isCvar (s2)) | |
1789 | { | |
1790 | uentry ue2 = sRef_getUentry (s2); | |
1791 | ||
1792 | if (uentry_isRefParam (ue2)) | |
1793 | { | |
1794 | return sRef_similarRelaxedAux (s1, s2); | |
1795 | } | |
1796 | } | |
1797 | ||
1798 | return (ctype_match (s1->type, s2->type)); | |
1799 | } | |
1800 | else | |
1801 | { | |
1802 | return sRef_similarRelaxedAux (s1, s2); | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | bool | |
1807 | sRef_similar (sRef s1, sRef s2) | |
1808 | { | |
1809 | if (s1 == s2) return TRUE; | |
1810 | if (sRef_isInvalid (s1) || sRef_isInvalid (s2)) return FALSE; | |
1811 | ||
1812 | if (sRef_isConj (s2)) | |
1813 | { | |
1814 | return (sRef_similar (s1, sRef_getConjA (s2)) || | |
1815 | sRef_similar (s1, sRef_getConjB (s2))); | |
1816 | } | |
1817 | ||
1818 | if (sRef_isDerived (s2)) | |
1819 | { | |
1820 | return (sRef_includedBy (s1, s2->info->ref)); | |
1821 | } | |
1822 | ||
1823 | switch (s1->kind) | |
1824 | { | |
1825 | case SK_CVAR: | |
1826 | return ((s2->kind == SK_CVAR) | |
1827 | && (cref_equal (s1->info->cvar, s2->info->cvar))); | |
1828 | case SK_PARAM: | |
1829 | return ((s2->kind == SK_PARAM) | |
1830 | && (s1->info->paramno == s2->info->paramno)); | |
1831 | case SK_ARRAYFETCH: | |
1832 | if (s2->kind == SK_ARRAYFETCH) | |
1833 | { | |
1834 | if (sRef_similar (s1->info->arrayfetch->arr, | |
1835 | s2->info->arrayfetch->arr)) | |
1836 | { | |
1837 | if (s1->info->arrayfetch->indknown) | |
1838 | { | |
1839 | if (s2->info->arrayfetch->indknown) | |
1840 | { | |
1841 | return (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind); | |
1842 | } | |
1843 | else | |
1844 | { | |
1845 | return TRUE; | |
1846 | } | |
1847 | } | |
1848 | else | |
1849 | { | |
1850 | return TRUE; | |
1851 | } | |
1852 | } | |
1853 | } | |
1854 | else | |
1855 | { | |
1856 | if (s2->kind == SK_PTR) | |
1857 | { | |
1858 | if (sRef_similar (s1->info->arrayfetch->arr, | |
1859 | s2->info->ref)) | |
1860 | { | |
1861 | return TRUE; | |
1862 | } | |
1863 | } | |
1864 | } | |
1865 | ||
1866 | return FALSE; | |
1867 | case SK_FIELD: | |
1868 | return ((s2->kind == SK_FIELD | |
1869 | && (sRef_similar (s1->info->field->rec, | |
1870 | s2->info->field->rec) | |
1871 | && cstring_equal (s1->info->field->field, | |
1872 | s2->info->field->field)))); | |
1873 | case SK_PTR: | |
1874 | if (s2->kind == SK_PTR) | |
1875 | { | |
1876 | return sRef_similar (s1->info->ref, s2->info->ref); | |
1877 | } | |
1878 | else | |
1879 | { | |
1880 | if (s2->kind == SK_ARRAYFETCH) | |
1881 | { | |
1882 | if (sRef_similar (s2->info->arrayfetch->arr, | |
1883 | s1->info->ref)) | |
1884 | { | |
1885 | return TRUE; | |
1886 | } | |
1887 | } | |
1888 | } | |
1889 | ||
1890 | return FALSE; | |
1891 | case SK_ADR: | |
1892 | return ((s2->kind == SK_ADR) | |
1893 | && sRef_similar (s1->info->ref, s2->info->ref)); | |
1894 | case SK_CONJ: | |
1895 | return ((sRef_similar (s1->info->conj->a, s2) || | |
1896 | (sRef_similar (s1->info->conj->b, s2)))); | |
1897 | case SK_DERIVED: | |
1898 | return (sRef_includedBy (s2, s1->info->ref)); | |
1899 | case SK_UNCONSTRAINED: | |
1900 | return (s2->kind == SK_UNCONSTRAINED | |
1901 | && cstring_equal (s1->info->fname, s2->info->fname)); | |
1902 | case SK_CONST: | |
1903 | case SK_TYPE: | |
1904 | case SK_NEW: | |
1905 | case SK_UNKNOWN: | |
1906 | case SK_OBJECT: | |
1907 | case SK_EXTERNAL: | |
1908 | case SK_RESULT: | |
1909 | return FALSE; | |
1910 | case SK_SPECIAL: | |
1911 | return (s2->kind == SK_SPECIAL | |
1912 | && (s1->info->spec == s2->info->spec)); | |
1913 | } | |
1914 | ||
1915 | /*@notreached@*/ DPRINTF (("Fell through for: %s / %s", sRef_unparse (s1), sRef_unparse (s2))); | |
1916 | BADEXIT; | |
1917 | } | |
1918 | ||
1919 | /* | |
1920 | ** return TRUE iff small can be derived from big. | |
1921 | ** | |
1922 | ** (e.g. x, x.a is includedBy x; | |
1923 | ** x.a is included By x.a; | |
1924 | */ | |
1925 | ||
1926 | bool | |
1927 | sRef_includedBy (sRef small, sRef big) | |
1928 | { | |
1929 | if (small == big) return TRUE; | |
1930 | if (sRef_isInvalid (small) || sRef_isInvalid (big)) return FALSE; | |
1931 | ||
1932 | if (sRef_isConj (big)) | |
1933 | return (sRef_similar (small, sRef_getConjA (big)) || | |
1934 | sRef_similar (small, sRef_getConjB (big))); | |
1935 | ||
1936 | switch (small->kind) | |
1937 | { | |
1938 | case SK_CVAR: | |
1939 | case SK_PARAM: | |
1940 | return (sRef_same (small, big)); | |
1941 | case SK_ARRAYFETCH: | |
1942 | if (big->kind == SK_ARRAYFETCH) | |
1943 | { | |
1944 | if (sRef_same (small->info->arrayfetch->arr, big->info->arrayfetch->arr)) | |
1945 | { | |
1946 | if (small->info->arrayfetch->indknown) | |
1947 | { | |
1948 | if (big->info->arrayfetch->indknown) | |
1949 | { | |
1950 | return (small->info->arrayfetch->ind == big->info->arrayfetch->ind); | |
1951 | } | |
1952 | else | |
1953 | { | |
1954 | return TRUE; | |
1955 | } | |
1956 | } | |
1957 | else | |
1958 | { | |
1959 | return TRUE; | |
1960 | } | |
1961 | } | |
1962 | } | |
1963 | return (sRef_includedBy (small->info->arrayfetch->arr, big)); | |
1964 | case SK_FIELD: | |
1965 | if (big->kind == SK_FIELD) | |
1966 | { | |
1967 | return | |
1968 | (sRef_same (small->info->field->rec, big->info->field->rec) && | |
1969 | cstring_equal (small->info->field->field, big->info->field->field)); | |
1970 | } | |
1971 | else | |
1972 | { | |
1973 | return (sRef_includedBy (small->info->field->rec, big)); | |
1974 | } | |
1975 | ||
1976 | case SK_PTR: | |
1977 | if (big->kind == SK_PTR) | |
1978 | { | |
1979 | return sRef_same (small->info->ref, big->info->ref); | |
1980 | } | |
1981 | else | |
1982 | { | |
1983 | return (sRef_includedBy (small->info->ref, big)); | |
1984 | } | |
1985 | ||
1986 | case SK_ADR: | |
1987 | return ((big->kind == SK_ADR) && sRef_similar (small->info->ref, big->info->ref)); | |
1988 | case SK_CONJ: | |
1989 | return ((sRef_includedBy (small->info->conj->a, big) || | |
1990 | (sRef_includedBy (small->info->conj->b, big)))); | |
1991 | case SK_DERIVED: | |
1992 | return (sRef_includedBy (small->info->ref, big)); | |
1993 | case SK_UNCONSTRAINED: | |
1994 | case SK_CONST: | |
1995 | case SK_TYPE: | |
1996 | case SK_NEW: | |
1997 | case SK_UNKNOWN: | |
1998 | case SK_OBJECT: | |
1999 | case SK_EXTERNAL: | |
2000 | case SK_RESULT: | |
2001 | return FALSE; | |
2002 | case SK_SPECIAL: | |
2003 | switch (small->info->spec) | |
2004 | { | |
2005 | case SR_NOTHING: return TRUE; | |
2006 | case SR_SPECSTATE: | |
2007 | case SR_INTERNAL: return (sRef_isSpecInternalState (big) || | |
2008 | sRef_isFileStatic (big)); | |
2009 | case SR_SYSTEM: return (sRef_isSystemState (big)); | |
28bf4b0b | 2010 | case SR_GLOBALMARKER: BADBRANCH; |
616915dd | 2011 | } |
2012 | } | |
2013 | BADEXIT; | |
2014 | } | |
2015 | ||
2016 | /* | |
2017 | ** Same is similar to similar, but not quite the same. | |
2018 | ** same and realSame aren't the same, but they are really similar. | |
2019 | ** similarly, same is the same as same. but realSame is | |
2020 | ** not really the same as same, or similar to similar. | |
2021 | ** | |
2022 | ** Similarly to similar, same checks if two sRefs are the same. | |
2023 | ** The similarities end, however, when same compares arrays | |
2024 | ** with unknown indexes. Similar returns false; same returns true. | |
2025 | ** | |
2026 | ** Similarly to similar and same, realSame is the same as same, | |
2027 | ** except they do not behave the same when face with unknown | |
2028 | ** sRefs. Same thinks they are not the same, but realSame thinks | |
2029 | ** the are. | |
2030 | ** | |
2031 | */ | |
2032 | ||
2033 | bool | |
2034 | sRef_realSame (sRef s1, sRef s2) | |
2035 | { | |
6483a926 | 2036 | if (s1 == s2) return TRUE; |
2037 | ||
2038 | if (sRef_isUnreasonable (s1) | |
2039 | || sRef_isUnreasonable (s2)) | |
2040 | { | |
2041 | return FALSE; | |
2042 | } | |
616915dd | 2043 | |
2044 | switch (s1->kind) | |
2045 | { | |
2046 | case SK_CVAR: | |
2047 | return ((s2->kind == SK_CVAR) && (cref_equal (s1->info->cvar, s2->info->cvar))); | |
2048 | case SK_PARAM: | |
2049 | return ((s2->kind == SK_PARAM) && (s1->info->paramno == s2->info->paramno)); | |
2050 | case SK_ARRAYFETCH: | |
2051 | if (s2->kind == SK_ARRAYFETCH) | |
2052 | { | |
2053 | if (sRef_realSame (s1->info->arrayfetch->arr, s2->info->arrayfetch->arr)) | |
2054 | { | |
2055 | if (s1->info->arrayfetch->indknown && s2->info->arrayfetch->indknown) | |
2056 | { | |
2057 | return (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind); | |
2058 | } | |
2059 | if (!s1->info->arrayfetch->indknown && !s2->info->arrayfetch->indknown) | |
2060 | { | |
2061 | return TRUE; | |
2062 | } | |
2063 | return FALSE; | |
2064 | } | |
2065 | } | |
2066 | return FALSE; | |
2067 | case SK_FIELD: | |
2068 | return ((s2->kind == SK_FIELD && | |
2069 | (sRef_realSame (s1->info->field->rec, s2->info->field->rec) && | |
2070 | cstring_equal (s1->info->field->field, s2->info->field->field)))); | |
2071 | case SK_PTR: | |
2072 | return ((s2->kind == SK_PTR) && sRef_realSame (s1->info->ref, s2->info->ref)); | |
2073 | case SK_ADR: | |
2074 | return ((s2->kind == SK_ADR) && sRef_realSame (s1->info->ref, s2->info->ref)); | |
2075 | case SK_CONJ: | |
2076 | return ((sRef_realSame (s1->info->conj->a, s2) || | |
2077 | (sRef_realSame (s1->info->conj->b, s2)))); | |
2078 | case SK_OBJECT: | |
2079 | return ((s2->kind == SK_OBJECT) | |
2080 | && ctype_match (s1->info->object, s2->info->object)); | |
2081 | case SK_EXTERNAL: | |
2082 | return ((s2->kind == SK_EXTERNAL) | |
2083 | && sRef_realSame (s1->info->ref, s2->info->ref)); | |
2084 | case SK_SPECIAL: | |
2085 | return ((s2->kind == SK_SPECIAL) && s1->info->spec == s2->info->spec); | |
2086 | case SK_DERIVED: | |
2087 | return ((s2->kind == SK_DERIVED) && sRef_realSame (s1->info->ref, s2->info->ref)); | |
2088 | case SK_UNCONSTRAINED: | |
2089 | return ((s2->kind == SK_UNCONSTRAINED) | |
2090 | && (cstring_equal (s1->info->fname, s2->info->fname))); | |
2091 | case SK_TYPE: | |
2092 | case SK_CONST: | |
2093 | case SK_NEW: | |
2094 | case SK_UNKNOWN: | |
2095 | case SK_RESULT: | |
2096 | return TRUE; /* changed this! was false */ | |
2097 | } | |
2098 | BADEXIT; | |
2099 | } | |
2100 | ||
28bf4b0b | 2101 | bool |
2102 | sRef_sameObject (sRef s1, sRef s2) | |
2103 | { | |
2104 | return (s1 == s2); | |
2105 | } | |
2106 | ||
616915dd | 2107 | /* |
2108 | ** same is similar to similar, but not quite the same. | |
2109 | ** | |
2110 | ** Similarly to similar, same checks is two sRefs are the same. | |
2111 | ** The similarities end, however, when same compares arrays | |
2112 | ** with unknown indexes. Similar returns false; same returns true. | |
2113 | */ | |
2114 | ||
2115 | bool | |
2116 | sRef_same (sRef s1, sRef s2) | |
2117 | { | |
2118 | if (s1 == s2) return TRUE; | |
2119 | if (sRef_isInvalid (s1) || sRef_isInvalid (s2)) return FALSE; | |
2120 | ||
2121 | switch (s1->kind) | |
2122 | { | |
2123 | case SK_CVAR: | |
2124 | return ((s2->kind == SK_CVAR) && (cref_equal (s1->info->cvar, s2->info->cvar))); | |
2125 | case SK_PARAM: | |
2126 | return ((s2->kind == SK_PARAM) && (s1->info->paramno == s2->info->paramno)); | |
2127 | case SK_ARRAYFETCH: | |
2128 | if (s2->kind == SK_ARRAYFETCH) | |
2129 | { | |
2130 | llassert (s1->info->field->rec != s1); | |
2131 | if (sRef_same (s1->info->arrayfetch->arr, s2->info->arrayfetch->arr)) | |
2132 | { | |
2133 | if (s1->info->arrayfetch->indknown && s2->info->arrayfetch->indknown) | |
2134 | { | |
2135 | return (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind); | |
2136 | } | |
2137 | return TRUE; | |
2138 | } | |
2139 | } | |
2140 | return FALSE; | |
2141 | case SK_FIELD: | |
2142 | { | |
2143 | llassert (s1->info->field->rec != s1); | |
2144 | return ((s2->kind == SK_FIELD && | |
2145 | (sRef_same (s1->info->field->rec, s2->info->field->rec) && | |
2146 | cstring_equal (s1->info->field->field, s2->info->field->field)))); | |
2147 | } | |
2148 | case SK_PTR: | |
2149 | { | |
2150 | llassert (s1->info->ref != s1); | |
2151 | return ((s2->kind == SK_PTR) && sRef_same (s1->info->ref, s2->info->ref)); | |
2152 | } | |
2153 | case SK_ADR: | |
2154 | { | |
2155 | llassert (s1->info->ref != s1); | |
2156 | return ((s2->kind == SK_ADR) && sRef_same (s1->info->ref, s2->info->ref)); | |
2157 | } | |
2158 | case SK_CONJ: | |
2159 | llassert (s1->info->conj->a != s1); | |
2160 | llassert (s1->info->conj->b != s1); | |
2161 | return ((sRef_same (s1->info->conj->a, s2)) && /* or or and? */ | |
2162 | (sRef_same (s1->info->conj->b, s2))); | |
2163 | case SK_SPECIAL: | |
2164 | return ((s2->kind == SK_SPECIAL) && s1->info->spec == s2->info->spec); | |
2165 | case SK_DERIVED: | |
2166 | llassert (s1->info->ref != s1); | |
2167 | return ((s2->kind == SK_DERIVED) && sRef_same (s1->info->ref, s2->info->ref)); | |
2168 | case SK_CONST: | |
2169 | case SK_UNCONSTRAINED: | |
2170 | case SK_TYPE: | |
2171 | case SK_UNKNOWN: | |
2172 | case SK_NEW: | |
2173 | case SK_OBJECT: | |
2174 | case SK_EXTERNAL: | |
2175 | case SK_RESULT: | |
2176 | return FALSE; | |
2177 | } | |
2178 | BADEXIT; | |
2179 | } | |
2180 | ||
2181 | /* | |
2182 | ** sort of similar, for use in def/use | |
2183 | */ | |
2184 | ||
2185 | static bool | |
2186 | sRef_closeEnough (sRef s1, sRef s2) | |
2187 | { | |
2188 | if (s1 == s2) return TRUE; | |
2189 | if (sRef_isInvalid (s1) || sRef_isInvalid (s2)) return FALSE; | |
2190 | ||
2191 | switch (s1->kind) | |
2192 | { | |
2193 | case SK_CVAR: | |
2194 | return (((s2->kind == SK_CVAR) && | |
2195 | (cref_equal (s1->info->cvar, s2->info->cvar))) || | |
2196 | (s2->kind == SK_UNCONSTRAINED && s1->info->cvar->lexlevel == 0)); | |
2197 | case SK_UNCONSTRAINED: | |
2198 | return (s2->kind == SK_UNCONSTRAINED | |
2199 | || ((s2->kind == SK_CVAR) && (s2->info->cvar->lexlevel == 0))); | |
2200 | case SK_PARAM: | |
2201 | return ((s2->kind == SK_PARAM) | |
2202 | && (s1->info->paramno == s2->info->paramno)); | |
2203 | case SK_ARRAYFETCH: | |
2204 | if (s2->kind == SK_ARRAYFETCH) | |
2205 | { | |
2206 | if (sRef_closeEnough (s1->info->arrayfetch->arr, s2->info->arrayfetch->arr)) | |
2207 | { | |
2208 | if (s1->info->arrayfetch->indknown && s2->info->arrayfetch->indknown) | |
2209 | { | |
2210 | return (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind); | |
2211 | } | |
2212 | return TRUE; | |
2213 | } | |
2214 | } | |
2215 | return FALSE; | |
2216 | case SK_FIELD: | |
2217 | return ((s2->kind == SK_FIELD && | |
2218 | (sRef_closeEnough (s1->info->field->rec, s2->info->field->rec) && | |
2219 | cstring_equal (s1->info->field->field, s2->info->field->field)))); | |
2220 | case SK_PTR: | |
2221 | return ((s2->kind == SK_PTR) && sRef_closeEnough (s1->info->ref, s2->info->ref)); | |
2222 | case SK_ADR: | |
2223 | return ((s2->kind == SK_ADR) && sRef_closeEnough (s1->info->ref, s2->info->ref)); | |
2224 | case SK_DERIVED: | |
2225 | return ((s2->kind == SK_DERIVED) && sRef_closeEnough (s1->info->ref, s2->info->ref)); | |
2226 | case SK_CONJ: | |
2227 | return ((sRef_closeEnough (s1->info->conj->a, s2)) || | |
2228 | (sRef_closeEnough (s1->info->conj->b, s2))); | |
2229 | case SK_SPECIAL: | |
2230 | return ((s2->kind == SK_SPECIAL) && s1->info->spec == s2->info->spec); | |
2231 | case SK_TYPE: | |
2232 | case SK_CONST: | |
2233 | case SK_UNKNOWN: | |
2234 | case SK_NEW: | |
2235 | case SK_OBJECT: | |
2236 | case SK_EXTERNAL: | |
2237 | case SK_RESULT: | |
2238 | ||
2239 | return FALSE; | |
2240 | } | |
2241 | BADEXIT; | |
2242 | } | |
2243 | ||
2244 | /* | |
2245 | drl add 12/24/2000 | |
2246 | s is an sRef of a formal paramenter in a function call constraint | |
2247 | we trys to return a constraint expression derived from the actual parementer of a function call. | |
2248 | */ | |
b9904f57 | 2249 | |
4ab867d6 | 2250 | /*@only@*/ constraintExpr sRef_fixConstraintParam (/*@observer@*/ sRef s, /*@observer@*/ /*@temp@*/ exprNodeList args) |
616915dd | 2251 | { |
2252 | constraintExpr ce; | |
2253 | ||
2254 | if (sRef_isInvalid (s)) | |
dc92450f | 2255 | llfatalbug((message("Invalid sRef"))); |
616915dd | 2256 | |
9280addf | 2257 | switch (s->kind) |
616915dd | 2258 | { |
9280addf | 2259 | case SK_RESULT: |
2260 | { | |
2261 | ce = constraintExpr_makeTermsRef (s); | |
2262 | return ce; | |
2263 | } | |
2264 | case SK_FIELD: | |
2265 | { | |
2266 | sRef temp; | |
2267 | ||
2268 | temp = (sRef_makeField (sRef_fixBaseParam (s->info->field->rec, args), | |
2269 | s->info->field->field)); | |
4ab867d6 | 2270 | ce = constraintExpr_makeTermsRef (temp); |
9280addf | 2271 | return ce; |
dc92450f | 2272 | } |
9280addf | 2273 | case SK_PTR: |
2274 | { | |
2275 | sRef temp; | |
2276 | temp = (sRef_makePointer (sRef_fixBaseParam (s->info->ref, args))); | |
2277 | ce = constraintExpr_makeTermsRef (temp); | |
2278 | return ce; | |
2279 | } | |
2280 | ||
2281 | case SK_ARRAYFETCH: | |
2282 | { | |
2283 | sRef temp; | |
bb25bea6 | 2284 | temp = sRef_saveCopy(s); |
2285 | temp = sRef_fixBaseParam (temp, args); | |
9280addf | 2286 | ce = constraintExpr_makeTermsRef (temp); |
28bf4b0b | 2287 | |
2288 | sRef_free(temp); | |
9280addf | 2289 | return ce; |
2290 | } | |
2291 | case SK_CVAR: | |
bb25bea6 | 2292 | { |
2293 | sRef temp; | |
2294 | temp = sRef_saveCopy(s); | |
2295 | ce = constraintExpr_makeTermsRef (temp); | |
28bf4b0b | 2296 | sRef_free(temp); |
bb25bea6 | 2297 | return ce; |
2298 | } | |
9280addf | 2299 | case SK_PARAM: |
b73d1009 | 2300 | { |
2301 | exprNode e; | |
2302 | llassert (exprNodeList_size (args) > s->info->paramno); | |
2303 | e = exprNodeList_nth (args, s->info->paramno); | |
2304 | ||
2305 | llassert (!(exprNode_isError (e))); | |
2306 | ce = constraintExpr_makeExprNode (e); | |
2307 | return ce; | |
2308 | } | |
dc92450f | 2309 | |
9280addf | 2310 | default: |
bb25bea6 | 2311 | { |
2312 | sRef temp; | |
b9904f57 | 2313 | llcontbug (message ("Trying to do fixConstraintParam on nonparam, nonglobal: %q for function with arguments %q", |
2314 | sRef_unparse (s), exprNodeList_unparse(args))); | |
bb25bea6 | 2315 | temp = sRef_saveCopy(s); |
2316 | ce = constraintExpr_makeTermsRef (temp); | |
28bf4b0b | 2317 | |
2318 | sRef_free(temp); | |
616915dd | 2319 | return ce; |
bb25bea6 | 2320 | } |
616915dd | 2321 | } |
616915dd | 2322 | } |
2323 | ||
2324 | /*@exposed@*/ sRef | |
2325 | sRef_fixBaseParam (/*@returned@*/ sRef s, exprNodeList args) | |
2326 | { | |
2327 | if (sRef_isInvalid (s)) return (sRef_undefined); | |
2328 | ||
2329 | switch (s->kind) | |
2330 | { | |
2331 | case SK_UNCONSTRAINED: | |
2332 | case SK_CVAR: | |
2333 | return s; | |
2334 | case SK_PARAM: | |
2335 | { | |
2336 | if (exprNodeList_size (args) > s->info->paramno) | |
2337 | { | |
2338 | exprNode e = exprNodeList_nth (args, s->info->paramno); | |
2339 | ||
2340 | if (exprNode_isError (e)) | |
2341 | { | |
2342 | return sRef_makeUnknown (); | |
2343 | } | |
2344 | ||
2345 | return (exprNode_getSref (e)); | |
2346 | } | |
2347 | else | |
2348 | { | |
2349 | return sRef_makeUnknown (); | |
2350 | } | |
2351 | } | |
2352 | case SK_ARRAYFETCH: | |
2353 | ||
2354 | if (s->info->arrayfetch->indknown) | |
2355 | { | |
2356 | return (sRef_makeArrayFetchKnown | |
2357 | (sRef_fixBaseParam (s->info->arrayfetch->arr, args), | |
2358 | s->info->arrayfetch->ind)); | |
2359 | } | |
2360 | else | |
2361 | { | |
2362 | return (sRef_makeArrayFetch | |
2363 | (sRef_fixBaseParam (s->info->arrayfetch->arr, args))); | |
2364 | } | |
2365 | case SK_FIELD: | |
abd7f895 | 2366 | { |
2367 | sRef res; | |
2368 | DPRINTF (("Fix field: %s", sRef_unparseFull (s))); | |
2369 | res = sRef_makeField (sRef_fixBaseParam (s->info->field->rec, args), | |
2370 | s->info->field->field); | |
2371 | DPRINTF (("Returns: %s", sRef_unparseFull (res))); | |
2372 | return res; | |
2373 | } | |
616915dd | 2374 | case SK_PTR: |
2375 | return (sRef_makePointer (sRef_fixBaseParam (s->info->ref, args))); | |
2376 | ||
2377 | case SK_ADR: | |
2378 | return (sRef_makeAddress (sRef_fixBaseParam (s->info->ref, args))); | |
2379 | ||
2380 | case SK_CONJ: | |
2381 | return (sRef_makeConj (sRef_fixBaseParam (s->info->conj->a, args), | |
2382 | sRef_fixBaseParam (s->info->conj->b, args))); | |
2383 | case SK_DERIVED: | |
2384 | case SK_SPECIAL: | |
2385 | case SK_TYPE: | |
2386 | case SK_CONST: | |
2387 | case SK_NEW: | |
2388 | case SK_UNKNOWN: | |
2389 | case SK_OBJECT: | |
2390 | case SK_EXTERNAL: | |
2391 | case SK_RESULT: | |
2392 | return s; | |
2393 | } | |
2394 | BADEXIT; | |
2395 | } | |
2396 | ||
2397 | /*@exposed@*/ sRef | |
2398 | sRef_undumpGlobal (char **c) | |
2399 | { | |
2400 | char p = **c; | |
2401 | ||
2402 | (*c)++; | |
2403 | ||
2404 | switch (p) | |
2405 | { | |
2406 | case 'g': | |
2407 | { | |
28bf4b0b | 2408 | usymId uid = usymId_fromInt (reader_getInt (c)); |
616915dd | 2409 | sstate defstate; |
2410 | nstate nullstate; | |
2411 | sRef ret; | |
2412 | ||
28bf4b0b | 2413 | reader_checkChar (c, '@'); |
2414 | defstate = sstate_fromInt (reader_getInt (c)); | |
616915dd | 2415 | |
28bf4b0b | 2416 | reader_checkChar (c, '@'); |
2417 | nullstate = nstate_fromInt (reader_getInt (c)); | |
616915dd | 2418 | |
6970c11b | 2419 | ret = sRef_makeGlobal (uid, ctype_unknown, stateInfo_currentLoc ()); |
28bf4b0b | 2420 | sRef_setNullStateN (ret, nullstate); |
616915dd | 2421 | ret->defstate = defstate; |
2422 | return ret; | |
2423 | } | |
2424 | case 's': | |
2425 | { | |
28bf4b0b | 2426 | int i = reader_getInt (c); |
616915dd | 2427 | speckind sk = speckind_fromInt (i); |
2428 | ||
2429 | switch (sk) | |
2430 | { | |
2431 | case SR_NOTHING: return (sRef_makeNothing ()); | |
2432 | case SR_INTERNAL: return (sRef_makeInternalState ()); | |
2433 | case SR_SPECSTATE: return (sRef_makeSpecState ()); | |
2434 | case SR_SYSTEM: return (sRef_makeSystemState ()); | |
28bf4b0b | 2435 | case SR_GLOBALMARKER: BADBRANCH; |
616915dd | 2436 | } |
2437 | BADEXIT; | |
2438 | } | |
2439 | case '-': | |
2440 | return sRef_undefined; | |
2441 | case 'u': | |
2442 | return sRef_makeUnknown (); | |
2443 | case 'x': | |
2444 | return sRef_makeUnknown (); | |
2445 | default: | |
2446 | llfatalerror (message ("sRef_undumpGlobal: bad line: %s", | |
2447 | cstring_fromChars (*c))); | |
2448 | } | |
2449 | BADEXIT; | |
2450 | } | |
2451 | ||
b9904f57 | 2452 | static /*@exposed@*/ sRef sRef_undumpBody (char **c) |
616915dd | 2453 | { |
2454 | char p = **c; | |
2455 | ||
2456 | (*c)++; | |
2457 | ||
2458 | switch (p) | |
2459 | { | |
2460 | case 'g': | |
16c024b5 | 2461 | return (sRef_makeGlobal (usymId_fromInt (reader_getInt (c)), |
2462 | ctype_unknown, stateInfo_currentLoc ())); | |
616915dd | 2463 | case 'p': |
16c024b5 | 2464 | return (sRef_makeParam (reader_getInt (c), ctype_unknown, |
2465 | stateInfo_makeLoc (g_currentloc, SA_DECLARED))); | |
616915dd | 2466 | case 'r': |
b072092f | 2467 | return (sRef_makeResult (ctype_undump (c))); |
616915dd | 2468 | case 'a': |
2469 | { | |
2470 | if ((**c >= '0' && **c <= '9') || **c == '-') | |
2471 | { | |
28bf4b0b | 2472 | int i = reader_getInt (c); |
616915dd | 2473 | sRef arr = sRef_undump (c); |
2474 | sRef ret = sRef_buildArrayFetchKnown (arr, i); | |
2475 | ||
2476 | return ret; | |
2477 | } | |
2478 | else | |
2479 | { | |
2480 | sRef arr = sRef_undump (c); | |
2481 | sRef ret = sRef_buildArrayFetch (arr); | |
2482 | ||
2483 | return ret; | |
2484 | } | |
2485 | } | |
2486 | case 'f': | |
2487 | { | |
2488 | cstring fname = cstring_undefined; | |
2489 | sRef ret; | |
2490 | ||
2491 | while (**c != '.') | |
2492 | { | |
2493 | fname = cstring_appendChar (fname, **c); | |
2494 | (*c)++; | |
2495 | } | |
2496 | (*c)++; | |
2497 | ||
2498 | ret = sRef_buildField (sRef_undump (c), fname); | |
2499 | cstring_markOwned (fname); | |
2500 | return (ret); | |
2501 | } | |
2502 | case 's': | |
2503 | { | |
28bf4b0b | 2504 | int i = reader_getInt (c); |
616915dd | 2505 | speckind sk = speckind_fromInt (i); |
2506 | ||
2507 | switch (sk) | |
2508 | { | |
2509 | case SR_NOTHING: return (sRef_makeNothing ()); | |
2510 | case SR_INTERNAL: return (sRef_makeInternalState ()); | |
2511 | case SR_SPECSTATE: return (sRef_makeSpecState ()); | |
2512 | case SR_SYSTEM: return (sRef_makeSystemState ()); | |
28bf4b0b | 2513 | case SR_GLOBALMARKER: BADBRANCH; |
616915dd | 2514 | } |
2515 | BADEXIT; | |
2516 | } | |
2517 | case 't': | |
2518 | { | |
2519 | sRef ptr = sRef_undump (c); | |
2520 | sRef ret = sRef_makePointer (ptr); | |
2521 | ||
2522 | return (ret); | |
2523 | } | |
2524 | case 'd': | |
2525 | { | |
2526 | sRef adr = sRef_undump (c); | |
2527 | sRef ret = sRef_makeAddress (adr); | |
2528 | ||
2529 | return (ret); | |
2530 | } | |
2531 | case 'o': | |
2532 | { | |
2533 | return (sRef_makeObject (ctype_undump (c))); | |
2534 | } | |
2535 | case 'c': | |
2536 | { | |
2537 | sRef s1 = sRef_undump (c); | |
2538 | sRef s2 = ((*c)++, sRef_undump (c)); | |
2539 | sRef ret = sRef_makeConj (s1, s2); | |
2540 | ||
2541 | return (ret); | |
2542 | } | |
2543 | case '-': | |
2544 | return sRef_undefined; | |
2545 | case 'u': | |
2546 | return sRef_makeUnknown (); | |
2547 | case 'x': | |
2548 | return sRef_makeUnknown (); | |
2549 | default: | |
2550 | llfatalerror (message ("sRef_undump: bad line: %s", cstring_fromChars (*c))); | |
2551 | } | |
2552 | BADEXIT; | |
2553 | } | |
2554 | ||
b9904f57 | 2555 | /*@exposed@*/ sRef sRef_undump (char **c) |
2556 | { | |
2557 | sRef res = sRef_undumpBody (c); | |
2558 | ||
2559 | if (reader_optCheckChar (c, '=')) | |
2560 | { | |
2561 | multiVal mv = multiVal_undump (c); | |
2562 | sRef_setValue (res, mv); | |
2563 | reader_checkChar (c, '='); | |
2564 | } | |
2565 | ||
2566 | return res; | |
2567 | } | |
2568 | ||
2569 | static /*@only@*/ cstring sRef_dumpBody (sRef s) | |
616915dd | 2570 | { |
2571 | if (sRef_isInvalid (s)) | |
2572 | { | |
2573 | return (cstring_makeLiteral ("-")); | |
2574 | } | |
2575 | else | |
2576 | { | |
2577 | switch (s->kind) | |
2578 | { | |
2579 | case SK_PARAM: | |
2580 | return (message ("p%d", s->info->paramno)); | |
2581 | case SK_ARRAYFETCH: | |
2582 | if (s->info->arrayfetch->indknown) | |
2583 | { | |
2584 | return (message ("a%d%q", s->info->arrayfetch->ind, | |
2585 | sRef_dump (s->info->arrayfetch->arr))); | |
2586 | } | |
2587 | else | |
2588 | { | |
2589 | return (message ("a%q", sRef_dump (s->info->arrayfetch->arr))); | |
2590 | } | |
2591 | case SK_FIELD: | |
2592 | return (message ("f%s.%q", s->info->field->field, | |
2593 | sRef_dump (s->info->field->rec))); | |
2594 | case SK_PTR: | |
2595 | return (message ("t%q", sRef_dump (s->info->ref))); | |
2596 | case SK_ADR: | |
2597 | return (message ("d%q", sRef_dump (s->info->ref))); | |
2598 | case SK_OBJECT: | |
2599 | return (message ("o%q", ctype_dump (s->info->object))); | |
2600 | case SK_SPECIAL: | |
2601 | return (message ("s%d", (int) s->info->spec)); | |
2602 | case SK_CONJ: | |
2603 | return (message ("c%q.%q", | |
2604 | sRef_dump (s->info->conj->a), | |
2605 | sRef_dump (s->info->conj->b))); | |
2606 | case SK_CVAR: | |
28bf4b0b | 2607 | if (sRef_isFileOrGlobalScope (s)) |
616915dd | 2608 | { |
2609 | return (message ("g%d", | |
2610 | usymtab_convertId (s->info->cvar->index))); | |
2611 | } | |
2612 | else | |
2613 | { | |
2614 | llcontbug (message ("Dumping local variable: %q", | |
2615 | sRef_unparseDebug (s))); | |
2616 | return (cstring_makeLiteral ("u")); | |
2617 | } | |
2618 | case SK_UNKNOWN: | |
2619 | return (cstring_makeLiteral ("u")); | |
2620 | case SK_RESULT: | |
2621 | return (message ("r%q", ctype_dump (s->type))); | |
2622 | case SK_TYPE: | |
2623 | case SK_CONST: | |
2624 | case SK_EXTERNAL: | |
2625 | case SK_DERIVED: | |
2626 | case SK_NEW: | |
2627 | case SK_UNCONSTRAINED: | |
2628 | llcontbug (message ("sRef_dump: bad kind: %q", | |
2629 | sRef_unparseFull (s))); | |
2630 | return (cstring_makeLiteral ("x")); | |
2631 | } | |
2632 | } | |
2633 | ||
2634 | BADEXIT; | |
2635 | } | |
2636 | ||
b9904f57 | 2637 | /*@only@*/ cstring sRef_dump (sRef s) |
2638 | { | |
2639 | cstring res = sRef_dumpBody (s); | |
2640 | ||
2641 | if (sRef_hasValue (s)) | |
2642 | { | |
2643 | res = message ("%q=%q=", res, multiVal_dump (sRef_getValue (s))); | |
2644 | } | |
2645 | ||
2646 | return res; | |
2647 | } | |
2648 | ||
616915dd | 2649 | cstring sRef_dumpGlobal (sRef s) |
2650 | { | |
b9904f57 | 2651 | llassert (!sRef_hasValue (s)); |
2652 | ||
616915dd | 2653 | if (sRef_isInvalid (s)) |
2654 | { | |
2655 | return (cstring_makeLiteral ("-")); | |
2656 | } | |
2657 | else | |
2658 | { | |
2659 | switch (s->kind) | |
2660 | { | |
2661 | case SK_CVAR: | |
28bf4b0b | 2662 | if (sRef_isFileOrGlobalScope (s)) |
616915dd | 2663 | { |
2664 | return (message ("g%d@%d@%d", | |
2665 | usymtab_convertId (s->info->cvar->index), | |
2666 | (int) s->defstate, | |
28bf4b0b | 2667 | (int) sRef_getNullState (s))); |
616915dd | 2668 | } |
2669 | else | |
2670 | { | |
2671 | llcontbug (message ("Dumping local variable: %q", | |
2672 | sRef_unparseDebug (s))); | |
2673 | return (cstring_makeLiteral ("u")); | |
2674 | } | |
2675 | case SK_UNKNOWN: | |
2676 | return (cstring_makeLiteral ("u")); | |
2677 | case SK_SPECIAL: | |
2678 | return (message ("s%d", (int) s->info->spec)); | |
2679 | default: | |
2680 | llcontbug (message ("sRef_dumpGlobal: bad kind: %q", | |
2681 | sRef_unparseFull (s))); | |
2682 | return (cstring_makeLiteral ("x")); | |
2683 | } | |
2684 | } | |
2685 | ||
2686 | BADEXIT; | |
2687 | } | |
2688 | ||
2689 | ctype | |
2690 | sRef_deriveType (sRef s, uentryList cl) | |
2691 | { | |
2692 | if (sRef_isInvalid (s)) return ctype_unknown; | |
2693 | ||
2694 | switch (s->kind) | |
2695 | { | |
2696 | case SK_CVAR: | |
2697 | return (uentry_getType (usymtab_getRefQuiet (s->info->cvar->lexlevel, | |
2698 | s->info->cvar->index))); | |
2699 | case SK_UNCONSTRAINED: | |
2700 | return (ctype_unknown); | |
2701 | case SK_PARAM: | |
28bf4b0b | 2702 | if (s->info->paramno >= 0) |
2703 | { | |
2704 | return uentry_getType (uentryList_getN (cl, s->info->paramno)); | |
2705 | } | |
2706 | else | |
2707 | { | |
2708 | return ctype_unknown; | |
2709 | } | |
616915dd | 2710 | case SK_ARRAYFETCH: |
2711 | { | |
2712 | ctype ca = sRef_deriveType (s->info->arrayfetch->arr, cl); | |
2713 | ||
2714 | if (ctype_isArray (ca)) | |
2715 | { | |
2716 | return (ctype_baseArrayPtr (ca)); | |
2717 | } | |
2718 | else if (ctype_isUnknown (ca)) | |
2719 | { | |
2720 | return (ca); | |
2721 | } | |
2722 | else | |
2723 | { | |
2724 | llcontbuglit ("sRef_deriveType: inconsistent array type"); | |
2725 | return ca; | |
2726 | } | |
2727 | } | |
2728 | case SK_FIELD: | |
2729 | { | |
2730 | ctype ct = sRef_deriveType (s->info->field->rec, cl); | |
2731 | ||
2732 | if (ctype_isStructorUnion (ct)) | |
2733 | { | |
2734 | uentry ue = uentryList_lookupField (ctype_getFields (ct), | |
2735 | s->info->field->field); | |
2736 | ||
2737 | if (uentry_isValid (ue)) | |
2738 | { | |
2739 | return (uentry_getType (ue)); | |
2740 | } | |
2741 | else | |
2742 | { | |
2743 | llcontbuglit ("sRef_deriveType: bad field"); | |
2744 | return ctype_unknown; | |
2745 | } | |
2746 | } | |
2747 | else if (ctype_isUnknown (ct)) | |
2748 | { | |
2749 | return (ct); | |
2750 | } | |
2751 | else | |
2752 | { | |
2753 | llcontbuglit ("sRef_deriveType: inconsistent field type"); | |
2754 | return (ct); | |
2755 | } | |
2756 | } | |
2757 | case SK_PTR: | |
2758 | { | |
2759 | ctype ct = sRef_deriveType (s->info->ref, cl); | |
2760 | ||
2761 | if (ctype_isUnknown (ct)) return ct; | |
2762 | if (ctype_isPointer (ct)) return (ctype_baseArrayPtr (ct)); | |
2763 | else | |
2764 | { | |
2765 | llcontbuglit ("sRef_deriveType: inconsistent pointer type"); | |
2766 | return (ct); | |
2767 | } | |
2768 | } | |
2769 | case SK_ADR: | |
2770 | { | |
2771 | ctype ct = sRef_deriveType (s->info->ref, cl); | |
2772 | ||
2773 | if (ctype_isUnknown (ct)) return ct; | |
2774 | return ctype_makePointer (ct); | |
2775 | } | |
2776 | case SK_DERIVED: | |
2777 | { | |
2778 | return sRef_deriveType (s->info->ref, cl); | |
2779 | } | |
2780 | case SK_OBJECT: | |
2781 | { | |
2782 | return (s->info->object); | |
2783 | } | |
2784 | case SK_CONJ: | |
2785 | { | |
2786 | return (ctype_makeConj (sRef_deriveType (s->info->conj->a, cl), | |
2787 | sRef_deriveType (s->info->conj->b, cl))); | |
2788 | } | |
2789 | case SK_RESULT: | |
2790 | case SK_CONST: | |
2791 | case SK_TYPE: | |
2792 | { | |
2793 | return (s->type); | |
2794 | } | |
2795 | case SK_SPECIAL: | |
2796 | case SK_UNKNOWN: | |
2797 | case SK_EXTERNAL: | |
2798 | case SK_NEW: | |
2799 | return ctype_unknown; | |
2800 | } | |
2801 | BADEXIT; | |
2802 | } | |
2803 | ||
2804 | ctype | |
2805 | sRef_getType (sRef s) | |
2806 | { | |
2807 | if (sRef_isInvalid (s)) return ctype_unknown; | |
2808 | return s->type; | |
2809 | } | |
2810 | ||
2811 | ||
2812 | /*@only@*/ cstring | |
2813 | sRef_unparseOpt (sRef s) | |
2814 | { | |
2815 | sRef rb = sRef_getRootBase (s); | |
2816 | ||
2817 | if (sRef_isMeaningful (rb) && !sRef_isConst (rb)) | |
2818 | { | |
2819 | cstring ret = sRef_unparse (s); | |
2820 | ||
2821 | llassertprint (!cstring_equalLit (ret, "?"), ("print: %s", sRef_unparseDebug (s))); | |
2822 | ||
2823 | if (!cstring_isEmpty (ret)) | |
2824 | { | |
2825 | return (cstring_appendChar (ret, ' ')); | |
2826 | } | |
2827 | else | |
2828 | { | |
2829 | return ret; | |
2830 | } | |
2831 | } | |
2832 | ||
2833 | return cstring_undefined; | |
2834 | } | |
2835 | ||
2836 | cstring | |
2837 | sRef_unparsePreOpt (sRef s) | |
2838 | { | |
2839 | sRef rb = sRef_getRootBase (s); | |
2840 | ||
2841 | if (sRef_isMeaningful (rb) && !sRef_isConst (rb)) | |
2842 | { | |
2843 | cstring ret = sRef_unparse (s); | |
2844 | ||
2845 | llassertprint (!cstring_equalLit (ret, "?"), ("print: %s", sRef_unparseDebug (s))); | |
2846 | return (cstring_prependCharO (' ', ret)); | |
2847 | } | |
2848 | ||
2849 | return cstring_undefined; | |
2850 | } | |
2851 | ||
2852 | /*@only@*/ cstring | |
2853 | sRef_unparse (sRef s) | |
2854 | { | |
2855 | if (sRef_isInvalid (s)) return (cstring_makeLiteral ("?")); | |
2856 | ||
2857 | if (context_inFunctionLike ()) | |
2858 | { | |
2859 | return (sRef_unparseWithArgs (s, context_getParams ())); | |
2860 | } | |
2861 | else | |
2862 | { | |
28bf4b0b | 2863 | DPRINTF (("Not in function like: %s", context_unparse ())); |
616915dd | 2864 | return (sRef_unparseNoArgs (s)); |
2865 | } | |
2866 | } | |
2867 | ||
2868 | static /*@only@*/ cstring | |
2869 | sRef_unparseWithArgs (sRef s, uentryList args) | |
2870 | { | |
2871 | if (sRef_isInvalid (s)) | |
2872 | { | |
2873 | return (cstring_makeLiteral ("?")); | |
2874 | } | |
2875 | ||
2876 | switch (s->kind) | |
2877 | { | |
2878 | case SK_CVAR: | |
2879 | return (uentry_getName (usymtab_getRefQuiet (s->info->cvar->lexlevel, | |
2880 | s->info->cvar->index))); | |
2881 | case SK_UNCONSTRAINED: | |
2882 | return (cstring_copy (s->info->fname)); | |
2883 | case SK_PARAM: | |
2884 | { | |
28bf4b0b | 2885 | if (s->info->paramno < uentryList_size (args) |
2886 | && s->info->paramno >= 0) | |
616915dd | 2887 | { |
2888 | uentry ue = uentryList_getN (args, s->info->paramno); | |
2889 | ||
2890 | if (uentry_isValid (ue)) | |
2891 | return uentry_getName (ue); | |
2892 | } | |
2893 | ||
b7e84605 | 2894 | return (message ("parameter %d", s->info->paramno + 1)); |
616915dd | 2895 | } |
2896 | case SK_ARRAYFETCH: | |
2897 | if (s->info->arrayfetch->indknown) | |
2898 | { | |
2899 | return (message ("%q[%d]", sRef_unparseWithArgs (s->info->arrayfetch->arr, args), | |
2900 | s->info->arrayfetch->ind)); | |
2901 | } | |
2902 | else | |
2903 | { | |
2904 | return (message ("%q[]", sRef_unparseWithArgs (s->info->arrayfetch->arr, args))); | |
2905 | } | |
2906 | case SK_FIELD: | |
2907 | if (s->info->field->rec->kind == SK_PTR) | |
2908 | { | |
2909 | sRef ptr = s->info->field->rec; | |
2910 | ||
2911 | return (message ("%q->%s", sRef_unparseWithArgs (ptr->info->ref, args), | |
2912 | s->info->field->field)); | |
2913 | } | |
2914 | return (message ("%q.%s", sRef_unparseWithArgs (s->info->field->rec, args), | |
2915 | s->info->field->field)); | |
2916 | ||
2917 | case SK_PTR: | |
2918 | { | |
2919 | sRef ref = sRef_fixConj (s->info->ref); | |
2920 | skind sk = ref->kind; | |
2921 | cstring ret; | |
2922 | ||
2923 | if (sk == SK_NEW) | |
2924 | { | |
2925 | ret = message ("storage pointed to by %q", | |
2926 | sRef_unparseWithArgs (ref, args)); | |
2927 | } | |
2928 | else if (skind_isSimple (sk) || sk == SK_PTR) | |
2929 | { | |
2930 | ret = message ("*%q", sRef_unparseWithArgs (ref, args)); | |
2931 | } | |
2932 | else | |
2933 | { | |
2934 | ret = message ("*(%q)", sRef_unparseWithArgs (ref, args)); | |
2935 | } | |
2936 | ||
2937 | return ret; | |
2938 | } | |
2939 | case SK_ADR: | |
2940 | return (message ("&%q", sRef_unparseWithArgs (s->info->ref, args))); | |
2941 | case SK_OBJECT: | |
2942 | return (cstring_copy (ctype_unparse (s->info->object))); | |
2943 | case SK_CONJ: | |
2944 | return (sRef_unparseWithArgs (sRef_getConjA (s), args)); | |
2945 | case SK_NEW: | |
2946 | if (cstring_isDefined (s->info->fname)) | |
2947 | { | |
2948 | return (message ("[result of %s]", s->info->fname)); | |
2949 | } | |
2950 | else | |
2951 | { | |
2952 | return (cstring_makeLiteral ("<new>")); | |
2953 | } | |
2954 | case SK_UNKNOWN: | |
2955 | return (cstring_makeLiteral ("?")); | |
2956 | case SK_DERIVED: | |
2957 | return (message ("<derived %q>", sRef_unparse (s->info->ref))); | |
2958 | case SK_EXTERNAL: | |
2959 | return (message ("<external %q>", sRef_unparse (s->info->ref))); | |
2960 | case SK_TYPE: | |
2961 | return (message ("<type %s>", ctype_unparse (s->type))); | |
2962 | case SK_CONST: | |
2963 | return (message ("<const %s>", ctype_unparse (s->type))); | |
2964 | case SK_SPECIAL: | |
28bf4b0b | 2965 | switch (s->info->spec) |
2966 | { | |
2967 | case SR_NOTHING: return cstring_makeLiteral ("nothing"); | |
2968 | case SR_INTERNAL: return cstring_makeLiteral ("internal state"); | |
2969 | case SR_SPECSTATE: return cstring_makeLiteral ("spec state"); | |
2970 | case SR_SYSTEM: return cstring_makeLiteral ("file system state"); | |
2971 | case SR_GLOBALMARKER: return cstring_makeLiteral ("<global marker>"); | |
2972 | } | |
2973 | BADBRANCH; | |
616915dd | 2974 | case SK_RESULT: |
2975 | return cstring_makeLiteral ("result"); | |
2976 | default: | |
2977 | { | |
2978 | llbug (message ("Bad sref, kind = %d", (int) s->kind)); | |
2979 | } | |
2980 | } | |
2981 | ||
2982 | BADEXIT; | |
2983 | } | |
2984 | ||
2985 | /*@only@*/ cstring | |
2986 | sRef_unparseDebug (sRef s) | |
2987 | { | |
28bf4b0b | 2988 | if (sRef_isInvalid (s)) |
2989 | { | |
2990 | return (cstring_makeLiteral ("<undef>")); | |
2991 | } | |
2992 | ||
616915dd | 2993 | |
2994 | switch (s->kind) | |
2995 | { | |
2996 | case SK_UNCONSTRAINED: | |
2997 | return (message ("<unconstrained %s>", s->info->fname)); | |
2998 | case SK_CVAR: | |
2999 | { | |
3000 | uentry ce; | |
3001 | ||
3002 | ce = usymtab_getRefQuiet (s->info->cvar->lexlevel, s->info->cvar->index); | |
3003 | ||
3004 | if (uentry_isInvalid (ce)) | |
3005 | { | |
3006 | return (message ("<scope: %d.%d *invalid*>", | |
3007 | s->info->cvar->lexlevel, | |
3008 | s->info->cvar->index)); | |
3009 | } | |
3010 | else | |
3011 | { | |
3012 | return (message ("<scope: %d.%d *%q*>", | |
3013 | s->info->cvar->lexlevel, | |
3014 | s->info->cvar->index, | |
3015 | uentry_getName (ce))); | |
3016 | } | |
3017 | ||
3018 | } | |
3019 | case SK_PARAM: | |
3020 | { | |
3021 | return (message ("<parameter %d>", s->info->paramno + 1)); | |
3022 | } | |
3023 | case SK_ARRAYFETCH: | |
3024 | if (s->info->arrayfetch->indknown) | |
3025 | { | |
3026 | return (message ("%q[%d]", sRef_unparseDebug (s->info->arrayfetch->arr), | |
3027 | s->info->arrayfetch->ind)); | |
3028 | } | |
3029 | else | |
3030 | { | |
3031 | return (message ("%q[]", sRef_unparseDebug (s->info->arrayfetch->arr))); | |
3032 | } | |
3033 | case SK_FIELD: | |
3034 | return (message ("%q.%s", sRef_unparseDebug (s->info->field->rec), | |
3035 | s->info->field->field)); | |
3036 | case SK_PTR: | |
28bf4b0b | 3037 | if (sRef_isField (s->info->ref)) |
3038 | { | |
3039 | sRef fld = s->info->ref; | |
3040 | ||
3041 | return (message ("%q->%s", sRef_unparseDebug (fld->info->field->rec), | |
3042 | fld->info->field->field)); | |
3043 | } | |
3044 | else | |
3045 | { | |
3046 | return (message ("*(%q)", sRef_unparseDebug (s->info->ref))); | |
3047 | } | |
616915dd | 3048 | case SK_ADR: |
3049 | return (message ("&%q", sRef_unparseDebug (s->info->ref))); | |
3050 | case SK_OBJECT: | |
3051 | return (message ("<object type %s>", ctype_unparse (s->info->object))); | |
3052 | case SK_CONJ: | |
3053 | return (message ("%q | %q", sRef_unparseDebug (s->info->conj->a), | |
3054 | sRef_unparseDebug (s->info->conj->b))); | |
3055 | case SK_NEW: | |
3056 | return message ("<new: %s>", s->info->fname); | |
3057 | case SK_DERIVED: | |
3058 | return (message ("<derived %q>", sRef_unparseDebug (s->info->ref))); | |
3059 | case SK_EXTERNAL: | |
3060 | return (message ("<external %q>", sRef_unparseDebug (s->info->ref))); | |
3061 | case SK_TYPE: | |
3062 | return (message ("<type %s>", ctype_unparse (s->type))); | |
3063 | case SK_CONST: | |
b9904f57 | 3064 | if (sRef_hasValue (s)) |
3065 | { | |
3066 | return (message ("<const %s=%q>", ctype_unparse (s->type), multiVal_unparse (sRef_getValue (s)))); | |
3067 | } | |
3068 | else | |
3069 | { | |
3070 | return (message ("<const %s>", ctype_unparse (s->type))); | |
3071 | } | |
616915dd | 3072 | case SK_RESULT: |
3073 | return (message ("<result %s>", ctype_unparse (s->type))); | |
3074 | case SK_SPECIAL: | |
3075 | return (message ("<spec %s>", | |
3076 | cstring_makeLiteralTemp | |
3077 | (s->info->spec == SR_NOTHING ? "nothing" | |
3078 | : s->info->spec == SR_INTERNAL ? "internalState" | |
3079 | : s->info->spec == SR_SPECSTATE ? "spec state" | |
3080 | : s->info->spec == SR_SYSTEM ? "fileSystem" | |
3081 | : "error"))); | |
3082 | case SK_UNKNOWN: | |
3083 | return cstring_makeLiteral ("<unknown>"); | |
3084 | } | |
3085 | ||
3086 | BADEXIT; | |
3087 | } | |
3088 | ||
3089 | static /*@only@*/ cstring | |
3090 | sRef_unparseNoArgs (sRef s) | |
3091 | { | |
3092 | if (sRef_isInvalid (s)) return (cstring_makeLiteral ("?")); | |
3093 | ||
3094 | switch (s->kind) | |
3095 | { | |
3096 | case SK_UNCONSTRAINED: | |
3097 | return (cstring_copy (s->info->fname)); | |
3098 | case SK_CVAR: | |
3099 | { | |
3100 | uentry ce = usymtab_getRefQuiet (s->info->cvar->lexlevel, | |
3101 | s->info->cvar->index); | |
3102 | ||
3103 | if (uentry_isInvalid (ce)) | |
3104 | { | |
28bf4b0b | 3105 | llcontbug (message ("sRef_unparseNoArgs: bad cvar: %q", |
3106 | sRef_unparseDebug (s))); | |
616915dd | 3107 | return (sRef_unparseDebug (s)); |
3108 | } | |
3109 | else | |
3110 | { | |
3111 | return (uentry_getName (ce)); | |
3112 | } | |
3113 | } | |
3114 | case SK_ARRAYFETCH: | |
3115 | if (s->info->arrayfetch->indknown) | |
3116 | { | |
3117 | return (message ("%q[%d]", sRef_unparseNoArgs (s->info->arrayfetch->arr), | |
3118 | s->info->arrayfetch->ind)); | |
3119 | } | |
3120 | else | |
3121 | { | |
3122 | return (message ("%q[]", sRef_unparseNoArgs (s->info->arrayfetch->arr))); | |
3123 | } | |
3124 | case SK_FIELD: | |
3125 | return (message ("%q.%s", sRef_unparseNoArgs (s->info->field->rec), | |
3126 | s->info->field->field)); | |
3127 | case SK_PTR: | |
3128 | { | |
3129 | sRef ref = sRef_fixConj (s->info->ref); | |
3130 | skind sk = ref->kind; | |
3131 | cstring ret; | |
3132 | ||
3133 | if (skind_isSimple (sk) || sk == SK_PTR) | |
3134 | { | |
3135 | ret = message ("*%q", sRef_unparseNoArgs (ref)); | |
3136 | } | |
3137 | else | |
3138 | { | |
3139 | ret = message ("*(%q)", sRef_unparseNoArgs (ref)); | |
3140 | } | |
3141 | ||
3142 | return (ret); | |
3143 | } | |
3144 | case SK_ADR: | |
3145 | return (message ("&%q", sRef_unparseNoArgs (s->info->ref))); | |
3146 | case SK_OBJECT: | |
3147 | return (cstring_copy (ctype_unparse (s->info->object))); | |
3148 | case SK_CONJ: | |
3149 | return (sRef_unparseNoArgs (s->info->conj->a)); | |
3150 | case SK_NEW: | |
3151 | return (message ("result of %s", s->info->fname)); | |
3152 | case SK_DERIVED: | |
3153 | return (message ("<der %q>", sRef_unparseNoArgs (s->info->ref))); | |
3154 | case SK_EXTERNAL: | |
3155 | return message ("<ext %q>", sRef_unparseNoArgs (s->info->ref)); | |
3156 | case SK_SPECIAL: | |
3157 | return (cstring_makeLiteral | |
3158 | (s->info->spec == SR_NOTHING ? "nothing" | |
3159 | : s->info->spec == SR_INTERNAL ? "internal state" | |
3160 | : s->info->spec == SR_SPECSTATE ? "spec state" | |
3161 | : s->info->spec == SR_SYSTEM ? "file system state" | |
3162 | : "<spec error>")); | |
3163 | case SK_RESULT: | |
3164 | return cstring_makeLiteral ("result"); | |
3165 | case SK_CONST: | |
3166 | case SK_TYPE: | |
3167 | case SK_UNKNOWN: | |
3168 | return cstring_makeLiteral ("?"); | |
3169 | case SK_PARAM: | |
3170 | /* llcontbug (message ("sRef_unparseNoArgs: bad case: %q", sRef_unparseDebug (s))); */ | |
3171 | return (sRef_unparseDebug (s)); | |
3172 | } | |
3173 | BADEXIT; | |
3174 | } | |
3175 | ||
3176 | /*@dependent@*/ sRef sRef_makeUnconstrained (cstring fname) | |
3177 | { | |
3178 | sRef s = sRef_new (); | |
3179 | ||
3180 | s->kind = SK_UNCONSTRAINED; | |
3181 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
6fcd0b1e | 3182 | s->info->fname = cstring_copy (fname); /* evans 2002-07-12: this was exposed, causing memory errors */ |
616915dd | 3183 | |
3184 | return (s); | |
3185 | } | |
3186 | ||
3187 | cstring sRef_unconstrainedName (sRef s) | |
3188 | { | |
3189 | llassert (sRef_isUnconstrained (s)); | |
3190 | ||
3191 | return s->info->fname; | |
3192 | } | |
3193 | ||
3194 | bool sRef_isUnconstrained (sRef s) | |
3195 | { | |
6483a926 | 3196 | return (sRef_isReasonable(s) && s->kind == SK_UNCONSTRAINED); |
616915dd | 3197 | } |
3198 | ||
3199 | static /*@dependent@*/ /*@notnull@*/ sRef | |
6970c11b | 3200 | sRef_makeCvarAux (int level, usymId index, ctype ct, /*@only@*/ stateInfo stinfo) |
616915dd | 3201 | { |
28bf4b0b | 3202 | sRef s = sRef_newRef (); |
3203 | ||
3204 | s->kind = SK_CVAR; | |
616915dd | 3205 | s->info = (sinfo) dmalloc (sizeof (*s->info)); |
3206 | ||
3207 | s->info->cvar = (cref) dmalloc (sizeof (*s->info->cvar)); | |
3208 | s->info->cvar->lexlevel = level; | |
3209 | s->info->cvar->index = index; | |
3210 | ||
3211 | /* for now, all globals are defined; all locals, aren't */ | |
3212 | ||
3213 | if (level <= fileScope) | |
3214 | { | |
3215 | s->defstate = SS_UNKNOWN; | |
3216 | } | |
3217 | else | |
3218 | { | |
3219 | ctype rct = ctype_realType (ct); | |
3220 | ||
3221 | if (level != paramsScope | |
3222 | && (ctype_isStructorUnion (rct) || ctype_isRealArray (rct))) | |
3223 | { | |
3224 | s->defstate = SS_ALLOCATED; | |
3225 | s->oaliaskind = s->aliaskind = AK_STACK; | |
3226 | } | |
3227 | else | |
3228 | { | |
3229 | s->defstate = SS_UNDEFINED; | |
3230 | s->oaliaskind = s->aliaskind = AK_LOCAL; | |
3231 | } | |
3232 | } | |
3233 | ||
3234 | s->type = ct; | |
3235 | ||
3236 | llassert (level >= globScope); | |
3237 | llassert (usymId_isValid (index)); | |
3238 | ||
28bf4b0b | 3239 | DPRINTF (("Made cvar: [%p] %s", s, sRef_unparseDebug (s))); |
3240 | llassert (valueTable_isUndefined (s->state)); | |
6970c11b | 3241 | s->state = context_createValueTable (s, stinfo); |
616915dd | 3242 | return s; |
3243 | } | |
3244 | ||
6970c11b | 3245 | /*@dependent@*/ sRef sRef_makeCvar (int level, usymId index, ctype ct, /*@only@*/ stateInfo stinfo) |
616915dd | 3246 | { |
6970c11b | 3247 | return (sRef_makeCvarAux (level, index, ct, stinfo)); |
616915dd | 3248 | } |
3249 | ||
3250 | int sRef_lexLevel (sRef s) | |
3251 | { | |
6483a926 | 3252 | if (sRef_isReasonable (s)) |
616915dd | 3253 | { |
3254 | sRef conj; | |
3255 | ||
3256 | conj = sRef_fixConj (s); | |
3257 | s = sRef_getRootBase (conj); | |
3258 | ||
6483a926 | 3259 | if (sRef_isReasonable (s) && s->kind == SK_CVAR) |
616915dd | 3260 | { |
3261 | return (s->info->cvar->lexlevel); | |
3262 | } | |
3263 | } | |
3264 | ||
3265 | return globScope; | |
3266 | } | |
3267 | ||
3268 | sRef | |
6970c11b | 3269 | sRef_makeGlobal (usymId l, ctype ct, /*@only@*/ stateInfo stinfo) |
616915dd | 3270 | { |
6970c11b | 3271 | return (sRef_makeCvar (globScope, l, ct, stinfo)); |
616915dd | 3272 | } |
3273 | ||
3274 | void | |
3275 | sRef_setParamNo (sRef s, int l) | |
3276 | { | |
6483a926 | 3277 | llassert (sRef_isReasonable (s) && s->kind == SK_PARAM); |
616915dd | 3278 | s->info->paramno = l; |
28bf4b0b | 3279 | llassert (l >= -1); |
616915dd | 3280 | } |
3281 | ||
3282 | /*@dependent@*/ sRef | |
6970c11b | 3283 | sRef_makeParam (int l, ctype ct, stateInfo stinfo) |
616915dd | 3284 | { |
3285 | sRef s = sRef_new (); | |
3286 | ||
3287 | s->kind = SK_PARAM; | |
3288 | s->type = ct; | |
3289 | ||
3290 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
3291 | s->info->paramno = l; | |
28bf4b0b | 3292 | llassert (l >= -1); |
3293 | s->defstate = SS_UNKNOWN; | |
3294 | /* (probably defined, unless its an out parameter) */ | |
616915dd | 3295 | |
28bf4b0b | 3296 | llassert (valueTable_isUndefined (s->state)); |
6970c11b | 3297 | s->state = context_createValueTable (s, stinfo); |
616915dd | 3298 | return s; |
3299 | } | |
3300 | ||
3301 | bool | |
3302 | sRef_isIndexKnown (sRef arr) | |
3303 | { | |
3304 | bool res; | |
3305 | ||
6483a926 | 3306 | llassert (sRef_isReasonable (arr)); |
616915dd | 3307 | arr = sRef_fixConj (arr); |
3308 | ||
3309 | llassert (arr->kind == SK_ARRAYFETCH); | |
3310 | res = arr->info->arrayfetch->indknown; | |
3311 | return (res); | |
3312 | } | |
3313 | ||
3314 | int | |
3315 | sRef_getIndex (sRef arr) | |
3316 | { | |
3317 | int result; | |
3318 | ||
6483a926 | 3319 | llassert (sRef_isReasonable (arr)); |
616915dd | 3320 | arr = sRef_fixConj (arr); |
3321 | ||
3322 | llassert (arr->kind == SK_ARRAYFETCH); | |
3323 | ||
3324 | if (!arr->info->arrayfetch->indknown) | |
3325 | { | |
3326 | llcontbug (message ("sRef_getIndex: unknown: %q", sRef_unparse (arr))); | |
3327 | result = 0; | |
3328 | } | |
3329 | else | |
3330 | { | |
3331 | result = arr->info->arrayfetch->ind; | |
3332 | } | |
3333 | ||
3334 | return result; | |
3335 | } | |
3336 | ||
3337 | static bool sRef_isZerothArrayFetch (/*@notnull@*/ sRef s) | |
3338 | { | |
3339 | return (s->kind == SK_ARRAYFETCH | |
3340 | && s->info->arrayfetch->indknown | |
3341 | && (s->info->arrayfetch->ind == 0)); | |
3342 | } | |
3343 | ||
3344 | /*@exposed@*/ sRef sRef_makeAddress (/*@exposed@*/ sRef t) | |
3345 | { | |
3346 | ||
3347 | if (sRef_isInvalid (t)) return sRef_undefined; | |
3348 | ||
3349 | if (sRef_isPointer (t)) | |
3350 | { | |
3351 | return (t->info->ref); | |
3352 | } | |
3353 | else if (sRef_isZerothArrayFetch (t)) | |
3354 | { | |
3355 | return (t->info->arrayfetch->arr); | |
3356 | } | |
3357 | else | |
3358 | { | |
28bf4b0b | 3359 | sRef s = sRef_newRef (); |
616915dd | 3360 | |
3361 | s->kind = SK_ADR; | |
3362 | s->type = ctype_makePointer (t->type); | |
3363 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
b2a40ced | 3364 | s->info->ref = t; |
616915dd | 3365 | |
3366 | if (t->defstate == SS_UNDEFINED) | |
3367 | /* no! it is allocated even still: && !ctype_isPointer (t->type)) */ | |
3368 | { | |
3369 | s->defstate = SS_ALLOCATED; | |
3370 | } | |
3371 | else | |
3372 | { | |
3373 | s->defstate = t->defstate; | |
3374 | } | |
3375 | ||
3376 | if (t->aliaskind == AK_LOCAL) | |
3377 | { | |
3378 | if (sRef_isLocalVar (t)) | |
3379 | { | |
3380 | s->aliaskind = AK_STACK; | |
3381 | } | |
3382 | } | |
3383 | ||
28bf4b0b | 3384 | llassert (valueTable_isUndefined (s->state)); |
16c024b5 | 3385 | s->state = context_createValueTable (s, |
3386 | stateInfo_makeLoc (g_currentloc, SA_CREATED)); | |
616915dd | 3387 | return s; |
3388 | } | |
3389 | } | |
3390 | ||
3391 | cstring sRef_getField (sRef s) | |
3392 | { | |
3393 | cstring res; | |
3394 | ||
6483a926 | 3395 | llassert (sRef_isReasonable (s)); |
616915dd | 3396 | s = sRef_fixConj (s); |
3397 | ||
6483a926 | 3398 | llassertprint (sRef_isReasonable (s) && (s->kind == SK_FIELD), |
616915dd | 3399 | ("s = %s", sRef_unparseDebug (s))); |
3400 | ||
3401 | res = s->info->field->field; | |
3402 | return (res); | |
3403 | } | |
3404 | ||
3405 | sRef sRef_getBase (sRef s) | |
3406 | { | |
3407 | sRef res; | |
3408 | ||
3409 | if (sRef_isInvalid (s)) return (sRef_undefined); | |
3410 | ||
3411 | s = sRef_fixConj (s); | |
3412 | ||
3413 | switch (s->kind) | |
3414 | { | |
3415 | case SK_ADR: | |
3416 | case SK_PTR: | |
3417 | case SK_DERIVED: | |
3418 | case SK_EXTERNAL: | |
3419 | res = s->info->ref; | |
3420 | break; | |
3421 | case SK_FIELD: | |
3422 | res = s->info->field->rec; | |
3423 | break; | |
3424 | ||
3425 | case SK_ARRAYFETCH: | |
3426 | res = s->info->arrayfetch->arr; | |
3427 | break; | |
3428 | ||
3429 | default: | |
3430 | res = sRef_undefined; /* shouldn't need it */ | |
3431 | } | |
3432 | ||
3433 | return (res); | |
3434 | } | |
3435 | ||
3436 | /* | |
3437 | ** same as getBase, except returns invalid | |
3438 | ** (and doesn't use adr's) | |
3439 | */ | |
3440 | ||
3441 | sRef | |
3442 | sRef_getBaseSafe (sRef s) | |
3443 | { | |
3444 | sRef res; | |
3445 | ||
3446 | if (sRef_isInvalid (s)) { return sRef_undefined; } | |
3447 | ||
3448 | s = sRef_fixConj (s); | |
3449 | ||
3450 | switch (s->kind) | |
3451 | { | |
3452 | case SK_PTR: | |
3453 | res = s->info->ref; | |
3454 | break; | |
3455 | case SK_FIELD: | |
3456 | res = s->info->field->rec; break; | |
3457 | case SK_ARRAYFETCH: | |
3458 | res = s->info->arrayfetch->arr; | |
3459 | break; | |
3460 | default: | |
3461 | res = sRef_undefined; break; | |
3462 | } | |
3463 | ||
3464 | return res; | |
3465 | } | |
3466 | ||
3467 | /*@constant int MAXBASEDEPTH;@*/ | |
3468 | # define MAXBASEDEPTH 25 | |
3469 | ||
3470 | static /*@exposed@*/ sRef | |
3471 | sRef_getRootBaseAux (sRef s, int depth) | |
3472 | { | |
3473 | if (sRef_isInvalid (s)) return sRef_undefined; | |
3474 | ||
3475 | if (depth > MAXBASEDEPTH) | |
3476 | { | |
3477 | llgenmsg (message | |
3478 | ("Warning: reference base limit exceeded for %q. " | |
3479 | "This either means there is a variable with at least " | |
3480 | "%d indirections from this reference, or " | |
11db3170 | 3481 | "there is a bug in Splint.", |
616915dd | 3482 | sRef_unparse (s), |
3483 | MAXBASEDEPTH), | |
3484 | g_currentloc); | |
3485 | ||
3486 | return sRef_undefined; | |
3487 | } | |
3488 | ||
3489 | switch (s->kind) | |
3490 | { | |
3491 | case SK_ADR: | |
3492 | case SK_PTR: | |
3493 | return (sRef_getRootBaseAux (s->info->ref, depth + 1)); | |
3494 | case SK_FIELD: | |
3495 | return (sRef_getRootBaseAux (s->info->field->rec, depth + 1)); | |
3496 | case SK_ARRAYFETCH: | |
3497 | return (sRef_getRootBaseAux (s->info->arrayfetch->arr, depth + 1)); | |
3498 | case SK_CONJ: | |
3499 | return (sRef_getRootBaseAux (sRef_fixConj (s), depth + 1)); | |
3500 | default: | |
3501 | return s; | |
3502 | } | |
3503 | } | |
3504 | ||
3505 | sRef sRef_getRootBase (sRef s) | |
3506 | { | |
3507 | return (sRef_getRootBaseAux (s, 0)); | |
3508 | } | |
3509 | ||
3510 | static bool sRef_isDeep (sRef s) | |
3511 | { | |
3512 | if (sRef_isInvalid (s)) return FALSE; | |
3513 | ||
3514 | switch (s->kind) | |
3515 | { | |
3516 | case SK_ADR: | |
3517 | case SK_PTR: | |
3518 | case SK_FIELD: | |
3519 | case SK_ARRAYFETCH: | |
3520 | return TRUE; | |
3521 | case SK_CONJ: | |
3522 | return (sRef_isDeep (sRef_fixConj (s))); | |
3523 | default: | |
3524 | return FALSE; | |
3525 | } | |
3526 | } | |
3527 | ||
3528 | static int sRef_depth (sRef s) | |
3529 | { | |
3530 | if (sRef_isInvalid (s)) return 0; | |
3531 | ||
3532 | switch (s->kind) | |
3533 | { | |
3534 | case SK_ADR: | |
3535 | case SK_PTR: | |
3536 | case SK_DERIVED: | |
3537 | case SK_EXTERNAL: | |
3538 | return 1 + sRef_depth (s->info->ref); | |
3539 | case SK_FIELD: | |
3540 | return 1 + sRef_depth (s->info->field->rec); | |
3541 | case SK_ARRAYFETCH: | |
3542 | return 1 + sRef_depth (s->info->arrayfetch->arr); | |
3543 | case SK_CONJ: | |
3544 | return (sRef_depth (sRef_fixConj (s))); | |
3545 | default: | |
3546 | return 1; | |
3547 | } | |
3548 | } | |
3549 | ||
3550 | sRef | |
3551 | sRef_makeObject (ctype o) | |
3552 | { | |
b73d1009 | 3553 | sRef s = sRef_newRef (); |
616915dd | 3554 | |
3555 | s->kind = SK_OBJECT; | |
3556 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
3557 | s->info->object = o; | |
28bf4b0b | 3558 | llassert (valueTable_isUndefined (s->state)); |
16c024b5 | 3559 | s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc, SA_CREATED)); |
616915dd | 3560 | return s; |
3561 | } | |
3562 | ||
28bf4b0b | 3563 | /* |
3564 | ** This is used to represent storage referenced by a parameter. | |
3565 | */ | |
3566 | ||
3567 | sRef sRef_makeExternal (sRef t) | |
616915dd | 3568 | { |
28bf4b0b | 3569 | sRef s = sRef_newRef (); |
616915dd | 3570 | |
6483a926 | 3571 | llassert (sRef_isReasonable (t)); |
616915dd | 3572 | |
3573 | s->kind = SK_EXTERNAL; | |
3574 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
3575 | s->type = t->type; | |
b73d1009 | 3576 | s->info->ref = t; |
28bf4b0b | 3577 | llassert (valueTable_isUndefined (s->state)); |
16c024b5 | 3578 | s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc, SA_DECLARED)); |
616915dd | 3579 | return s; |
3580 | } | |
3581 | ||
28bf4b0b | 3582 | /*@dependent@*/ sRef sRef_makeDerived (/*@exposed@*/ sRef t) |
616915dd | 3583 | { |
6483a926 | 3584 | if (sRef_isReasonable (t)) |
616915dd | 3585 | { |
28bf4b0b | 3586 | sRef s = sRef_newRef (); |
616915dd | 3587 | |
3588 | s->kind = SK_DERIVED; | |
3589 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
b73d1009 | 3590 | s->info->ref = t; |
616915dd | 3591 | |
3592 | s->type = t->type; | |
28bf4b0b | 3593 | llassert (valueTable_isUndefined (s->state)); |
16c024b5 | 3594 | s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc, SA_CREATED)); |
616915dd | 3595 | return s; |
3596 | } | |
3597 | else | |
3598 | { | |
3599 | return sRef_undefined; | |
3600 | } | |
3601 | } | |
3602 | ||
3603 | /* | |
3604 | ** definitely NOT symmetric: | |
3605 | ** | |
3606 | ** res fills in unknown state information from other | |
3607 | */ | |
3608 | ||
3609 | void | |
3610 | sRef_mergeStateQuiet (sRef res, sRef other) | |
3611 | { | |
6483a926 | 3612 | llassert (sRef_isReasonable (res)); |
3613 | llassert (sRef_isReasonable (other)); | |
616915dd | 3614 | |
3615 | res->modified = res->modified || other->modified; | |
3616 | res->safe = res->safe && other->safe; | |
3617 | ||
3618 | if (res->defstate == SS_UNKNOWN) | |
3619 | { | |
3620 | res->defstate = other->defstate; | |
28bf4b0b | 3621 | res->definfo = stateInfo_update (res->definfo, other->definfo); |
616915dd | 3622 | } |
3623 | ||
3624 | if (res->aliaskind == AK_UNKNOWN || | |
3625 | (res->aliaskind == AK_LOCAL && alkind_isKnown (other->aliaskind))) | |
3626 | { | |
3627 | res->aliaskind = other->aliaskind; | |
3628 | res->oaliaskind = other->oaliaskind; | |
28bf4b0b | 3629 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 3630 | } |
3631 | ||
3632 | if (res->expkind == XO_UNKNOWN) | |
3633 | { | |
3634 | res->expkind = other->expkind; | |
3635 | res->oexpkind = other->oexpkind; | |
28bf4b0b | 3636 | res->expinfo = stateInfo_update (res->expinfo, other->expinfo); |
616915dd | 3637 | } |
3638 | ||
3639 | /* out takes precedence over implicitly defined */ | |
3640 | if (res->defstate == SS_DEFINED && other->defstate != SS_UNKNOWN) | |
3641 | { | |
3642 | res->defstate = other->defstate; | |
28bf4b0b | 3643 | res->definfo = stateInfo_update (res->definfo, other->definfo); |
616915dd | 3644 | } |
3645 | ||
28bf4b0b | 3646 | if (sRef_getNullState (other) == NS_ERROR || sRef_getNullState (res) == NS_ERROR) |
616915dd | 3647 | { |
28bf4b0b | 3648 | sRef_setNullState (res, NS_ERROR, fileloc_undefined); |
616915dd | 3649 | } |
3650 | else | |
3651 | { | |
28bf4b0b | 3652 | if (sRef_getNullState (other) != NS_UNKNOWN |
3653 | && (sRef_getNullState (res) == NS_UNKNOWN || sRef_getNullState (res) == NS_NOTNULL | |
3654 | || sRef_getNullState (res) == NS_MNOTNULL)) | |
616915dd | 3655 | { |
28bf4b0b | 3656 | sRef_updateNullState (res, other); |
616915dd | 3657 | } |
3658 | } | |
3659 | } | |
3660 | ||
3661 | /* | |
3662 | ** definitely NOT symmetric: | |
3663 | ** | |
3664 | ** res fills in known state information from other | |
3665 | */ | |
3666 | ||
3667 | void | |
28bf4b0b | 3668 | sRef_mergeStateQuietReverse (/*@dependent@*/ sRef res, /*@dependent@*/ sRef other) |
616915dd | 3669 | { |
3670 | bool changed = FALSE; | |
3671 | ||
6483a926 | 3672 | llassert (sRef_isReasonable (res)); |
3673 | llassert (sRef_isReasonable (other)); | |
28bf4b0b | 3674 | sRef_checkMutable (res); |
616915dd | 3675 | |
3676 | if (res->kind != other->kind) | |
3677 | { | |
3678 | changed = TRUE; | |
3679 | ||
3680 | sinfo_free (res); | |
3681 | ||
3682 | res->kind = other->kind; | |
3683 | res->type = other->type; | |
3684 | res->info = sinfo_fullCopy (other); | |
3685 | } | |
3686 | else | |
3687 | { | |
3688 | if (!ctype_equal (res->type, other->type)) | |
3689 | { | |
3690 | changed = TRUE; | |
3691 | res->type = other->type; | |
3692 | } | |
3693 | ||
3694 | sinfo_update (res, other); | |
3695 | } | |
3696 | ||
3697 | res->modified = res->modified || other->modified; | |
3698 | res->safe = res->safe && other->safe; | |
3699 | ||
3700 | if (res->aliaskind != other->aliaskind | |
3701 | && (res->aliaskind == AK_UNKNOWN | |
3702 | || ((res->aliaskind == AK_LOCAL | |
3703 | || (res->aliaskind == AK_REFCOUNTED | |
3704 | && other->aliaskind != AK_LOCAL)) | |
3705 | && other->aliaskind != AK_UNKNOWN))) | |
3706 | { | |
3707 | changed = TRUE; | |
3708 | res->aliaskind = other->aliaskind; | |
3709 | res->oaliaskind = other->oaliaskind; | |
28bf4b0b | 3710 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
3711 | } | |
616915dd | 3712 | |
3713 | if (other->expkind != XO_UNKNOWN && other->expkind != res->expkind) | |
3714 | { | |
3715 | changed = TRUE; | |
3716 | res->expkind = other->expkind; | |
28bf4b0b | 3717 | res->expinfo = stateInfo_update (res->expinfo, other->expinfo); |
616915dd | 3718 | } |
3719 | ||
3720 | if (other->oexpkind != XO_UNKNOWN) | |
3721 | { | |
3722 | res->oexpkind = other->oexpkind; | |
3723 | } | |
3724 | ||
3725 | /* out takes precedence over implicitly defined */ | |
3726 | ||
3727 | if (res->defstate != other->defstate) | |
3728 | { | |
3729 | if (other->defstate != SS_UNKNOWN) | |
3730 | { | |
3731 | res->defstate = other->defstate; | |
16c024b5 | 3732 | res->definfo = stateInfo_update (res->definfo, other->definfo); |
616915dd | 3733 | } |
3734 | } | |
3735 | ||
28bf4b0b | 3736 | if (sRef_getNullState (other) == NS_ERROR || sRef_getNullState (res) == NS_ERROR) |
616915dd | 3737 | { |
28bf4b0b | 3738 | if (sRef_getNullState (res) != NS_ERROR) |
616915dd | 3739 | { |
28bf4b0b | 3740 | sRef_setNullStateN (res, NS_ERROR); |
616915dd | 3741 | changed = TRUE; |
3742 | } | |
3743 | } | |
3744 | else | |
3745 | { | |
16c024b5 | 3746 | if (sRef_getNullState (other) != NS_UNKNOWN |
3747 | && sRef_getNullState (other) != sRef_getNullState (res)) | |
616915dd | 3748 | { |
3749 | changed = TRUE; | |
28bf4b0b | 3750 | sRef_updateNullState (res, other); |
616915dd | 3751 | } |
3752 | } | |
3753 | ||
3754 | if (changed) | |
3755 | { | |
3756 | sRef_clearDerived (res); | |
3757 | } | |
3758 | } | |
3759 | ||
3760 | void | |
3761 | sRef_mergeState (sRef res, sRef other, clause cl, fileloc loc) | |
3762 | { | |
6483a926 | 3763 | if (sRef_isReasonable (res) && sRef_isReasonable (other)) |
616915dd | 3764 | { |
3765 | sRef_mergeStateAux (res, other, cl, FALSE, loc, TRUE); | |
3766 | } | |
3767 | else | |
3768 | { | |
3769 | if (sRef_isInvalid (res)) | |
3770 | { | |
3771 | llbug (message ("sRef_mergeState: invalid res sRef: %q", | |
3772 | sRef_unparseDebug (other))); | |
3773 | } | |
3774 | else | |
3775 | { | |
3776 | llbug (message ("sRef_mergeState: invalid other sRef: %q", | |
3777 | sRef_unparseDebug (res))); | |
3778 | } | |
3779 | } | |
3780 | } | |
3781 | ||
3782 | void | |
3783 | sRef_mergeOptState (sRef res, sRef other, clause cl, fileloc loc) | |
3784 | { | |
6483a926 | 3785 | if (sRef_isReasonable (res) && sRef_isReasonable (other)) |
616915dd | 3786 | { |
3787 | sRef_mergeStateAux (res, other, cl, TRUE, loc, TRUE); | |
3788 | } | |
3789 | else | |
3790 | { | |
3791 | if (sRef_isInvalid (res)) | |
3792 | { | |
3793 | llbug (message ("sRef_mergeOptState: invalid res sRef: %q", | |
3794 | sRef_unparseDebug (other))); | |
3795 | } | |
3796 | else | |
3797 | { | |
3798 | llbug (message ("sRef_mergeOptState: invalid other sRef: %q", | |
3799 | sRef_unparseDebug (res))); | |
3800 | } | |
3801 | } | |
3802 | } | |
3803 | ||
3804 | static void | |
3805 | sRef_mergeStateAux (/*@notnull@*/ sRef res, /*@notnull@*/ sRef other, | |
3806 | clause cl, bool opt, fileloc loc, | |
3807 | bool doDerivs) | |
3808 | /*@modifies res@*/ | |
3809 | { | |
6483a926 | 3810 | llassertfatal (sRef_isReasonable (res)); |
3811 | llassertfatal (sRef_isReasonable (other)); | |
616915dd | 3812 | |
60868d40 | 3813 | DPRINTF (("Merge aux: %s / %s", |
393e573f | 3814 | sRef_unparseFull (res), |
3815 | sRef_unparseFull (other))); | |
60868d40 | 3816 | |
28bf4b0b | 3817 | sRef_checkMutable (res); |
3818 | sRef_checkMutable (other); | |
3819 | ||
616915dd | 3820 | res->modified = res->modified || other->modified; |
3821 | ||
3822 | if (res->kind == other->kind | |
3823 | || (other->kind == SK_UNKNOWN || res->kind == SK_UNKNOWN)) | |
3824 | { | |
3825 | sstate odef = other->defstate; | |
3826 | sstate rdef = res->defstate; | |
28bf4b0b | 3827 | nstate onull = sRef_getNullState (other); |
616915dd | 3828 | |
3829 | /* | |
3830 | ** yucky stuff to handle | |
3831 | ** | |
3832 | ** if (s) free (s); | |
3833 | */ | |
3834 | ||
3835 | if (other->defstate == SS_DEAD | |
3836 | && ((sRef_isOnly (res) && sRef_definitelyNull (res)) | |
3837 | || (res->defstate == SS_UNDEFINED | |
3838 | || res->defstate == SS_UNUSEABLE))) | |
3839 | { | |
3840 | if (res->defstate == SS_UNDEFINED | |
3841 | || res->defstate == SS_UNUSEABLE) | |
3842 | { | |
3843 | res->defstate = SS_UNUSEABLE; | |
3844 | } | |
3845 | else | |
3846 | { | |
3847 | res->defstate = SS_DEAD; | |
3848 | } | |
3849 | ||
28bf4b0b | 3850 | res->definfo = stateInfo_update (res->definfo, other->definfo); |
616915dd | 3851 | sRef_clearDerived (other); |
3852 | sRef_clearDerived (res); | |
3853 | } | |
3854 | else if (res->defstate == SS_DEAD | |
3855 | && ((sRef_isOnly (other) && sRef_definitelyNull (other)) | |
3856 | || (other->defstate == SS_UNDEFINED | |
3857 | || other->defstate == SS_UNUSEABLE))) | |
3858 | { | |
3859 | if (other->defstate == SS_UNDEFINED | |
3860 | || other->defstate == SS_UNUSEABLE) | |
3861 | { | |
3862 | res->defstate = SS_UNUSEABLE; | |
3863 | } | |
3864 | else | |
3865 | { | |
3866 | res->defstate = SS_DEAD; | |
3867 | } | |
3868 | ||
16c024b5 | 3869 | res->definfo = stateInfo_update (res->definfo, other->definfo); |
616915dd | 3870 | sRef_clearDerived (other); |
3871 | sRef_clearDerived (res); | |
3872 | } | |
3873 | else if (res->defstate == SS_DEFINED | |
3874 | && (other->defstate == SS_ALLOCATED | |
3875 | && sRef_definitelyNull (other))) | |
3876 | { | |
3877 | other->defstate = SS_DEFINED; /* definitely null! */ | |
3878 | } | |
3879 | else if (other->defstate == SS_DEFINED | |
3880 | && (res->defstate == SS_ALLOCATED && sRef_definitelyNull (res))) | |
3881 | { | |
3882 | res->defstate = SS_DEFINED; | |
28bf4b0b | 3883 | res->definfo = stateInfo_update (res->definfo, other->definfo); |
616915dd | 3884 | } |
3885 | else | |
3886 | { | |
3887 | ; /* okay */ | |
3888 | } | |
3889 | ||
3890 | if (res->defstate == SS_DEAD && other->defstate == SS_DEAD) | |
3891 | { | |
3892 | sRef_clearDerived (other); | |
3893 | sRef_clearDerived (res); | |
3894 | } | |
3895 | ||
3896 | /* | |
3897 | ** only & dead isn't really an only! | |
3898 | */ | |
3899 | ||
3900 | if (alkind_isOnly (other->aliaskind) && other->defstate == SS_DEAD) | |
3901 | { | |
3902 | other->aliaskind = AK_UNKNOWN; | |
3903 | } | |
3904 | ||
3905 | if (alkind_isOnly (res->aliaskind) && res->defstate == SS_DEAD) | |
3906 | { | |
3907 | res->aliaskind = AK_UNKNOWN; | |
3908 | } | |
3909 | ||
3910 | /* | |
3911 | ** Dead and dependent -> dead | |
3912 | */ | |
3913 | ||
3914 | if (alkind_isDependent (other->aliaskind) && res->defstate == SS_DEAD) | |
3915 | { | |
3916 | other->aliaskind = AK_UNKNOWN; | |
3917 | other->defstate = SS_DEAD; | |
3918 | sRef_clearDerived (res); | |
3919 | sRef_clearDerived (other); | |
28bf4b0b | 3920 | } |
3921 | ||
616915dd | 3922 | if (alkind_isDependent (res->aliaskind) && other->defstate == SS_DEAD) |
3923 | { | |
3924 | res->aliaskind = AK_UNKNOWN; | |
3925 | res->defstate = SS_DEAD; | |
3926 | sRef_clearDerived (res); | |
3927 | sRef_clearDerived (other); | |
3928 | } | |
3929 | ||
3930 | /* | |
3931 | ** must do alias combine first, since it depends on | |
3932 | ** original values of state and null. | |
3933 | */ | |
3934 | ||
3935 | sRef_combineAliasKinds (res, other, cl, loc); | |
3936 | sRef_combineDefState (res, other); | |
3937 | sRef_combineNullState (res, other); | |
3938 | ||
3939 | if (rdef == SS_ALLOCATED || rdef == SS_SPECIAL) | |
3940 | { | |
3941 | if (odef == SS_DEFINED) | |
3942 | { | |
3943 | if (onull == NS_DEFNULL || onull == NS_CONSTNULL) | |
3944 | { | |
28bf4b0b | 3945 | res->deriv = sRefSet_copyInto (res->deriv, other->deriv); |
3946 | DPRINTF (("Copy derivs: %s", sRef_unparseFull (res))); | |
3947 | } | |
616915dd | 3948 | } |
28bf4b0b | 3949 | else if (odef == SS_ALLOCATED || odef == SS_SPECIAL) |
616915dd | 3950 | { |
3951 | ||
3952 | if (doDerivs) | |
3953 | { | |
3954 | if (ctype_isUnion (ctype_realType (sRef_getType (res)))) | |
3955 | { | |
3956 | res->deriv = sRef_mergeUnionDerivs (res->deriv, | |
3957 | other->deriv, | |
3958 | opt, cl, loc); | |
28bf4b0b | 3959 | DPRINTF (("Copy derivs: %s", sRef_unparseFull (res))); |
616915dd | 3960 | } |
3961 | else | |
3962 | { | |
28bf4b0b | 3963 | res->deriv = sRef_mergeDerivs (res->deriv, other->deriv, |
616915dd | 3964 | opt, cl, loc); |
28bf4b0b | 3965 | DPRINTF (("Copy derivs: %s", sRef_unparseFull (res))); |
616915dd | 3966 | } |
3967 | } | |
3968 | } | |
3969 | else | |
3970 | { | |
3971 | if (doDerivs) | |
3972 | { | |
28bf4b0b | 3973 | res->deriv = sRef_mergeDerivs (res->deriv, other->deriv, |
616915dd | 3974 | opt, cl, loc); |
28bf4b0b | 3975 | DPRINTF (("Copy derivs: %s", sRef_unparseFull (res))); |
616915dd | 3976 | } |
3977 | else | |
3978 | { | |
28bf4b0b | 3979 | ; |
3980 | } | |
616915dd | 3981 | } |
3982 | } | |
3983 | else | |
3984 | { | |
3985 | if (rdef == SS_PDEFINED | |
3986 | || (rdef == SS_DEFINED && odef == SS_PDEFINED)) | |
3987 | { | |
28bf4b0b | 3988 | if (doDerivs) |
3989 | { | |
3990 | res->deriv = sRef_mergePdefinedDerivs (res->deriv, other->deriv, | |
3991 | opt, cl, loc); | |
3992 | DPRINTF (("Copy derivs: %s", sRef_unparseFull (res))); | |
3993 | } | |
616915dd | 3994 | } |
3995 | else | |
3996 | { | |
3997 | if ((rdef == SS_DEFINED || rdef == SS_UNKNOWN) | |
3998 | && res->defstate == SS_ALLOCATED) | |
3999 | { | |
28bf4b0b | 4000 | res->deriv = sRefSet_copyInto (res->deriv, other->deriv); |
616915dd | 4001 | } |
4002 | else | |
4003 | { | |
4004 | if (doDerivs) | |
4005 | { | |
28bf4b0b | 4006 | res->deriv = sRef_mergeDerivs (res->deriv, other->deriv, |
616915dd | 4007 | opt, cl, loc); |
28bf4b0b | 4008 | DPRINTF (("Copy derivs: %s", sRef_unparseFull (res))); |
616915dd | 4009 | } |
4010 | } | |
4011 | } | |
4012 | } | |
28bf4b0b | 4013 | |
616915dd | 4014 | |
4015 | sRef_combineExKinds (res, other); | |
4016 | } | |
4017 | else | |
4018 | { | |
4019 | if (res->kind == SK_ARRAYFETCH && other->kind == SK_PTR) | |
4020 | { | |
4021 | sRef nother = sRef_buildArrayFetchKnown (sRef_getBase (other), 0); | |
4022 | ||
4023 | sRef_copyState (nother, other); | |
4024 | sRef_mergeStateAux (res, nother, cl, opt, loc, doDerivs); | |
4025 | } | |
4026 | else if (res->kind == SK_PTR && other->kind == SK_ARRAYFETCH) | |
4027 | { | |
4028 | sRef nother = sRef_buildPointer (sRef_getBase (other)); | |
4029 | ||
6483a926 | 4030 | if (sRef_isReasonable (nother)) |
616915dd | 4031 | { |
4032 | sRef_copyState (nother, other); | |
4033 | sRef_mergeStateAux (res, nother, cl, opt, loc, doDerivs); | |
4034 | } | |
4035 | } | |
4036 | else | |
4037 | { | |
4038 | llcontbug (message ("merge conj: %q / %q", sRef_unparseFull (res), | |
4039 | sRef_unparseFull (other))); | |
4040 | ||
4041 | } | |
4042 | } | |
28bf4b0b | 4043 | |
4044 | /* | |
4045 | ** Merge value table states | |
4046 | */ | |
4047 | ||
b37cf05e | 4048 | # if 0 |
4049 | /* | |
4050 | ** This doesn't do anything. And its broken too... | |
4051 | */ | |
4052 | ||
28bf4b0b | 4053 | valueTable_elements (res->state, key, sv) |
4054 | { | |
4055 | stateValue os = valueTable_lookup (other->state, key); | |
4056 | /*@unused@*/ int val; | |
4057 | /*@unused@*/ char *msg; | |
4058 | ||
4059 | llassert (stateValue_isDefined (os)); | |
4060 | ||
4061 | DPRINTF (("Merge state: %s / %s", | |
4062 | cstring_toCharsSafe (stateValue_unparse (sv)), | |
4063 | cstring_toCharsSafe (stateValue_unparse (os)))); | |
4064 | /* | |
4065 | val = valueMatix_lookup (key, | |
4066 | stateValue_getValue (os), | |
4067 | stateValue_getValue (sv), | |
4068 | &msg); | |
4069 | DPRINTF (("Val: %d / %s", val, msg)); | |
4070 | */ | |
4071 | } end_valueTable_elements ; | |
b37cf05e | 4072 | # endif |
4073 | ||
393e573f | 4074 | DPRINTF (("Merge aux: %s / %s", |
4075 | sRef_unparseFull (res), | |
4076 | sRef_unparseFull (other))); | |
28bf4b0b | 4077 | } |
616915dd | 4078 | |
4079 | static sRefSet | |
4080 | sRef_mergeUnionDerivs (/*@only@*/ sRefSet res, | |
4081 | /*@exposed@*/ sRefSet other, bool opt, | |
4082 | clause cl, fileloc loc) | |
4083 | { | |
4084 | if (sRefSet_isEmpty (res)) | |
4085 | { | |
28bf4b0b | 4086 | return sRefSet_copyInto (res, other); |
616915dd | 4087 | } |
4088 | else | |
4089 | { | |
4090 | sRefSet_allElements (other, el) | |
4091 | { | |
6483a926 | 4092 | if (sRef_isReasonable (el)) |
616915dd | 4093 | { |
4094 | sRef e2 = sRefSet_lookupMember (other, el); | |
4095 | ||
6483a926 | 4096 | if (sRef_isReasonable (e2)) |
616915dd | 4097 | { |
4098 | sRef_mergeStateAux (el, e2, cl, opt, loc, FALSE); | |
4099 | } | |
4100 | else | |
4101 | { | |
4102 | res = sRefSet_insert (res, el); | |
4103 | } | |
4104 | } | |
4105 | } end_sRefSet_allElements ; | |
4106 | ||
4107 | return res; | |
4108 | } | |
4109 | } | |
4110 | ||
4111 | static /*@only@*/ sRefSet | |
4112 | sRef_mergeDerivs (/*@only@*/ sRefSet res, sRefSet other, | |
4113 | bool opt, clause cl, fileloc loc) | |
4114 | { | |
4115 | sRefSet ret = sRefSet_new (); | |
28bf4b0b | 4116 | |
616915dd | 4117 | sRefSet_allElements (res, el) |
4118 | { | |
6483a926 | 4119 | if (sRef_isReasonable (el)) |
616915dd | 4120 | { |
4121 | sRef e2 = sRefSet_lookupMember (other, el); | |
4122 | ||
6483a926 | 4123 | if (sRef_isReasonable (e2)) |
616915dd | 4124 | { |
4125 | if (el->defstate == SS_ALLOCATED && | |
4126 | e2->defstate == SS_PDEFINED) | |
4127 | { | |
4128 | e2->defstate = SS_ALLOCATED; | |
4129 | } | |
4130 | else if (e2->defstate == SS_ALLOCATED && | |
4131 | el->defstate == SS_PDEFINED) | |
4132 | { | |
4133 | el->defstate = SS_ALLOCATED; | |
16c024b5 | 4134 | el->definfo = stateInfo_update (el->definfo, e2->definfo); |
616915dd | 4135 | sRef_clearDerived (el); |
4136 | } | |
4137 | else if ((el->defstate == SS_DEAD || sRef_isKept (el)) && | |
4138 | (e2->defstate == SS_DEFINED && !sRef_isKept (e2))) | |
4139 | { | |
16c024b5 | 4140 | DPRINTF (("Checking dead: %s / %s", sRef_unparseFull (el), |
4141 | sRef_unparseFull (e2))); | |
4142 | ||
4143 | if (checkDeadState (el, e2, TRUE, loc)) | |
616915dd | 4144 | { |
4145 | if (sRef_isThroughArrayFetch (el)) | |
4146 | { | |
4147 | sRef_maybeKill (el, loc); | |
4148 | sRef_maybeKill (e2, loc); | |
4149 | } | |
4150 | } | |
4151 | } | |
4152 | else if ((e2->defstate == SS_DEAD || sRef_isKept (e2)) && | |
4153 | (el->defstate == SS_DEFINED && !sRef_isKept (el))) | |
4154 | { | |
16c024b5 | 4155 | DPRINTF (("Checking dead: %s / %s", sRef_unparseFull (el), |
4156 | sRef_unparseFull (e2))); | |
4157 | ||
4158 | if (checkDeadState (e2, el, FALSE, loc)) | |
616915dd | 4159 | { |
4160 | if (sRef_isThroughArrayFetch (el)) | |
4161 | { | |
4162 | sRef_maybeKill (el, loc); | |
4163 | sRef_maybeKill (e2, loc); | |
4164 | } | |
4165 | } | |
4166 | } | |
4167 | else if (el->defstate == SS_DEFINED && | |
4168 | e2->defstate == SS_PDEFINED) | |
4169 | { | |
28bf4b0b | 4170 | DPRINTF (("set pdefined: %s", sRef_unparseFull (el))); |
616915dd | 4171 | el->defstate = SS_PDEFINED; |
16c024b5 | 4172 | el->definfo = stateInfo_update (el->definfo, e2->definfo); |
616915dd | 4173 | } |
4174 | else if (e2->defstate == SS_DEFINED && | |
4175 | el->defstate == SS_PDEFINED) | |
4176 | { | |
28bf4b0b | 4177 | DPRINTF (("set pdefined: %s", sRef_unparseFull (e2))); |
616915dd | 4178 | e2->defstate = SS_PDEFINED; |
16c024b5 | 4179 | e2->definfo = stateInfo_update (e2->definfo, el->definfo); |
616915dd | 4180 | } |
4181 | else | |
4182 | { | |
4183 | ; /* okay */ | |
4184 | } | |
4185 | ||
4186 | if (ctype_isUnion (ctype_realType (sRef_getType (el)))) | |
4187 | { | |
4188 | el->deriv = sRef_mergeUnionDerivs (el->deriv, e2->deriv, | |
4189 | opt, cl, loc); | |
4190 | } | |
4191 | else | |
4192 | { | |
4193 | el->deriv = sRef_mergeDerivs (el->deriv, e2->deriv, opt, cl, loc); | |
4194 | } | |
4195 | ||
4196 | if (sRef_equivalent (el, e2)) | |
4197 | { | |
28bf4b0b | 4198 | ret = sRefSet_insert (ret, el); |
616915dd | 4199 | } |
4200 | else | |
4201 | { | |
4202 | sRef sr = sRef_leastCommon (el, e2); | |
4203 | ||
6483a926 | 4204 | if (sRef_isReasonable (sr)) |
616915dd | 4205 | { |
4206 | ret = sRefSet_insert (ret, sr); | |
4207 | } | |
4208 | else | |
4209 | { | |
4210 | ; | |
4211 | } | |
4212 | } | |
4213 | ||
4214 | (void) sRefSet_delete (other, e2); | |
4215 | } | |
4216 | else /* not defined */ | |
4217 | { | |
16c024b5 | 4218 | DPRINTF (("Checking dead: %s", sRef_unparseFull (el))); |
4219 | (void) checkDeadState (el, e2, TRUE, loc); | |
616915dd | 4220 | } |
4221 | } | |
4222 | } end_sRefSet_allElements; | |
4223 | ||
4224 | sRefSet_allElements (other, el) | |
4225 | { | |
6483a926 | 4226 | if (sRef_isReasonable (el)) |
616915dd | 4227 | { |
16c024b5 | 4228 | DPRINTF (("Checking dead: %s", sRef_unparseFull (el))); |
4229 | (void) checkDeadState (el, sRef_undefined, FALSE, loc); | |
616915dd | 4230 | } |
4231 | } end_sRefSet_allElements; | |
28bf4b0b | 4232 | |
616915dd | 4233 | sRefSet_free (res); |
4234 | return (ret); | |
4235 | } | |
4236 | ||
4237 | /* | |
4238 | ** Returns TRUE is there is an error. | |
4239 | */ | |
4240 | ||
16c024b5 | 4241 | static bool checkDeadState (/*@notnull@*/ sRef el, sRef e2, bool tbranch, fileloc loc) |
616915dd | 4242 | { |
4243 | /* | |
4244 | ** usymtab_isGuarded --- the utab should still be in the | |
4245 | ** state of the alternate branch. | |
4246 | ** | |
4247 | ** tbranch TRUE means el is released in the last branch, e.g. | |
4248 | ** if (x != NULL) { ; } else { sfree (x); } | |
4249 | ** so, if x is null in the other branch no error is reported. | |
4250 | ** | |
4251 | ** tbranch FALSE means this is the other branch: | |
4252 | ** if (x != NULL) { sfree (x); } else { ; } | |
4253 | ** so, if x is null in this branch there is no error. | |
4254 | */ | |
4255 | ||
4256 | ||
4257 | if ((sRef_isDead (el) || sRef_isKept (el)) | |
16c024b5 | 4258 | && !sRef_isDeepUnionField (el) |
4259 | && !sRef_isThroughArrayFetch (el)) | |
616915dd | 4260 | { |
4261 | ||
4262 | if (!tbranch) | |
4263 | { | |
28bf4b0b | 4264 | if (usymtab_isDefinitelyNullDeep (el)) |
616915dd | 4265 | { |
28bf4b0b | 4266 | return TRUE; |
616915dd | 4267 | } |
4268 | } | |
4269 | else | |
4270 | { | |
28bf4b0b | 4271 | if (usymtab_isAltDefinitelyNullDeep (el)) |
616915dd | 4272 | { |
28bf4b0b | 4273 | return TRUE; |
616915dd | 4274 | } |
4275 | } | |
28bf4b0b | 4276 | |
616915dd | 4277 | if (optgenerror |
4278 | (FLG_BRANCHSTATE, | |
4279 | message ("Storage %q is %q in one path, but live in another.", | |
4280 | sRef_unparse (el), | |
4281 | cstring_makeLiteral (sRef_isKept (el) | |
4282 | ? "kept" : "released")), | |
4283 | loc)) | |
4284 | { | |
616915dd | 4285 | if (sRef_isKept (el)) |
4286 | { | |
4287 | sRef_showAliasInfo (el); | |
4288 | } | |
4289 | else | |
4290 | { | |
4291 | sRef_showStateInfo (el); | |
4292 | } | |
4293 | ||
16c024b5 | 4294 | if (sRef_isValid (e2)) |
4295 | { | |
4296 | if (sRef_isKept (e2)) | |
4297 | { | |
4298 | sRef_showAliasInfo (e2); | |
4299 | } | |
4300 | else | |
4301 | { | |
4302 | sRef_showStateInfo (e2); | |
4303 | } | |
4304 | } | |
4305 | ||
616915dd | 4306 | /* prevent further errors */ |
4307 | el->defstate = SS_UNKNOWN; | |
16c024b5 | 4308 | sRef_setAliasKind (el, AK_ERROR, fileloc_undefined); |
616915dd | 4309 | return FALSE; |
4310 | } | |
4311 | } | |
4312 | ||
4313 | return TRUE; | |
4314 | } | |
4315 | ||
4316 | static void | |
4317 | checkDerivDeadState (/*@notnull@*/ sRef el, bool tbranch, fileloc loc) | |
4318 | { | |
16c024b5 | 4319 | if (checkDeadState (el, sRef_undefined, tbranch, loc)) |
616915dd | 4320 | { |
4321 | sRefSet_allElements (el->deriv, t) | |
4322 | { | |
6483a926 | 4323 | if (sRef_isReasonable (t)) |
616915dd | 4324 | { |
16c024b5 | 4325 | checkDerivDeadState (t, tbranch, loc); |
616915dd | 4326 | } |
4327 | } end_sRefSet_allElements; | |
4328 | } | |
4329 | } | |
4330 | ||
4331 | static sRefSet | |
4332 | sRef_mergePdefinedDerivs (sRefSet res, sRefSet other, bool opt, | |
4333 | clause cl, fileloc loc) | |
4334 | { | |
4335 | sRefSet ret = sRefSet_new (); | |
4336 | ||
4337 | sRefSet_allElements (res, el) | |
4338 | { | |
6483a926 | 4339 | if (sRef_isReasonable (el)) |
616915dd | 4340 | { |
4341 | sRef e2 = sRefSet_lookupMember (other, el); | |
4342 | ||
6483a926 | 4343 | if (sRef_isReasonable (e2)) |
616915dd | 4344 | { |
4345 | if (sRef_isAllocated (el) && !sRef_isAllocated (e2)) | |
4346 | { | |
4347 | ; | |
4348 | } | |
4349 | else if (sRef_isAllocated (e2) && !sRef_isAllocated (el)) | |
4350 | { | |
28bf4b0b | 4351 | el->deriv = sRefSet_copyInto (el->deriv, e2->deriv); |
616915dd | 4352 | } |
4353 | else | |
4354 | { | |
4355 | el->deriv = sRef_mergePdefinedDerivs (el->deriv, e2->deriv, | |
4356 | opt, cl, loc); | |
4357 | } | |
4358 | ||
4359 | sRef_mergeStateAux (el, e2, cl, opt, loc, FALSE); | |
4360 | ||
4361 | ret = sRefSet_insert (ret, el); | |
4362 | (void) sRefSet_delete (other, e2); | |
4363 | } | |
4364 | else | |
4365 | { | |
4366 | if (!opt) | |
4367 | { | |
16c024b5 | 4368 | checkDerivDeadState (el, (cl == FALSECLAUSE), loc); |
616915dd | 4369 | } |
4370 | ||
4371 | ret = sRefSet_insert (ret, el); | |
4372 | } | |
4373 | } | |
4374 | } end_sRefSet_allElements; | |
4375 | ||
4376 | sRefSet_allElements (other, el) | |
4377 | { | |
6483a926 | 4378 | if (sRef_isReasonable (el)) |
616915dd | 4379 | { |
4380 | if (!sRefSet_member (ret, el)) | |
4381 | { | |
4382 | /* was cl == FALSECLAUSE */ | |
4383 | checkDerivDeadState (el, FALSE, loc); | |
4384 | ret = sRefSet_insert (ret, el); | |
4385 | } | |
4386 | else | |
4387 | { | |
4388 | /* | |
4389 | ** it's okay --- member is a different equality test | |
4390 | */ | |
4391 | } | |
4392 | } | |
4393 | } end_sRefSet_allElements; | |
4394 | ||
4395 | sRefSet_free (res); | |
4396 | return (ret); | |
4397 | } | |
4398 | ||
4399 | sRef sRef_makeConj (/*@exposed@*/ /*@returned@*/ sRef a, /*@exposed@*/ sRef b) | |
4400 | { | |
6483a926 | 4401 | llassert (sRef_isReasonable (a)); |
4402 | llassert (sRef_isReasonable (b)); | |
616915dd | 4403 | |
4404 | if (!sRef_equivalent (a, b)) | |
4405 | { | |
28bf4b0b | 4406 | sRef s = sRef_newRef (); |
616915dd | 4407 | |
4408 | s->kind = SK_CONJ; | |
4409 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
4410 | s->info->conj = (cjinfo) dmalloc (sizeof (*s->info->conj)); | |
b73d1009 | 4411 | s->info->conj->a = a; |
4412 | s->info->conj->b = b; | |
616915dd | 4413 | |
4414 | if (ctype_equal (a->type, b->type)) s->type = a->type; | |
4415 | else s->type = ctype_makeConj (a->type, b->type); | |
4416 | ||
4417 | if (a->defstate == b->defstate) | |
4418 | { | |
4419 | s->defstate = a->defstate; | |
16c024b5 | 4420 | s->definfo = stateInfo_update (s->definfo, a->definfo); |
4421 | s->definfo = stateInfo_update (s->definfo, b->definfo); | |
616915dd | 4422 | } |
4423 | else | |
4424 | { | |
4425 | s->defstate = SS_UNKNOWN; | |
4426 | } | |
4427 | ||
28bf4b0b | 4428 | sRef_setNullStateN (s, NS_UNKNOWN); |
616915dd | 4429 | |
4430 | s->safe = a->safe && b->safe; | |
4431 | s->aliaskind = alkind_resolve (a->aliaskind, b->aliaskind); | |
4432 | ||
28bf4b0b | 4433 | llassert (valueTable_isUndefined (s->state)); |
16c024b5 | 4434 | s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc, SA_MERGED)); |
616915dd | 4435 | return s; |
4436 | } | |
4437 | else | |
4438 | { | |
4439 | /*@-exposetrans@*/ return a; /*@=exposetrans@*/ | |
4440 | } | |
4441 | } | |
4442 | ||
28bf4b0b | 4443 | /*@dependent@*/ sRef |
616915dd | 4444 | sRef_makeUnknown () |
4445 | { | |
4446 | sRef s = sRef_new (); | |
4447 | ||
4448 | s->kind = SK_UNKNOWN; | |
4449 | return s; | |
4450 | } | |
4451 | ||
abd7f895 | 4452 | static /*@owned@*/ /*@notnull@*/ sRef |
616915dd | 4453 | sRef_makeSpecial (speckind sk) /*@*/ |
4454 | { | |
4455 | sRef s = sRef_new (); | |
4456 | ||
4457 | s->kind = SK_SPECIAL; | |
4458 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
4459 | s->info->spec = sk; | |
28bf4b0b | 4460 | /*@-dependenttrans@*/ |
616915dd | 4461 | return s; |
28bf4b0b | 4462 | /*@=dependenttrans@*/ |
616915dd | 4463 | } |
4464 | ||
28bf4b0b | 4465 | static /*@owned@*/ sRef srnothing = sRef_undefined; |
4466 | static /*@owned@*/ sRef srinternal = sRef_undefined; | |
4467 | static /*@owned@*/ sRef srsystem = sRef_undefined; | |
4468 | static /*@owned@*/ sRef srspec = sRef_undefined; | |
616915dd | 4469 | |
28bf4b0b | 4470 | /*@dependent@*/ sRef |
616915dd | 4471 | sRef_makeNothing (void) |
4472 | { | |
4473 | if (sRef_isInvalid (srnothing)) | |
4474 | { | |
4475 | srnothing = sRef_makeSpecial (SR_NOTHING); | |
4476 | } | |
4477 | ||
616915dd | 4478 | return srnothing; |
616915dd | 4479 | } |
4480 | ||
4481 | sRef | |
4482 | sRef_makeInternalState (void) | |
4483 | { | |
4484 | if (sRef_isInvalid (srinternal)) | |
4485 | { | |
4486 | srinternal = sRef_makeSpecial (SR_INTERNAL); | |
4487 | } | |
4488 | ||
616915dd | 4489 | return srinternal; |
616915dd | 4490 | } |
4491 | ||
4492 | sRef | |
4493 | sRef_makeSpecState (void) | |
4494 | { | |
4495 | if (sRef_isInvalid (srspec)) | |
4496 | { | |
4497 | srspec = sRef_makeSpecial (SR_SPECSTATE); | |
4498 | } | |
4499 | ||
616915dd | 4500 | return srspec; |
616915dd | 4501 | } |
4502 | ||
4503 | sRef | |
4504 | sRef_makeSystemState (void) | |
4505 | { | |
4506 | if (sRef_isInvalid (srsystem)) | |
4507 | { | |
4508 | srsystem = sRef_makeSpecial (SR_SYSTEM); | |
4509 | } | |
4510 | ||
28bf4b0b | 4511 | return srsystem; |
4512 | } | |
4513 | ||
4514 | sRef | |
4515 | sRef_makeGlobalMarker (void) | |
4516 | { | |
4517 | sRef s = sRef_makeSpecial (SR_GLOBALMARKER); | |
4518 | llassert (valueTable_isUndefined (s->state)); | |
6970c11b | 4519 | s->state = context_createGlobalMarkerValueTable (stateInfo_undefined); |
28bf4b0b | 4520 | return s; |
616915dd | 4521 | } |
4522 | ||
616915dd | 4523 | sRef |
b072092f | 4524 | sRef_makeResult (ctype c) |
616915dd | 4525 | { |
28bf4b0b | 4526 | sRef s = sRef_newRef (); |
616915dd | 4527 | |
4528 | s->kind = SK_RESULT; | |
b072092f | 4529 | s->type = c; |
616915dd | 4530 | s->defstate = SS_UNKNOWN; |
4531 | s->aliaskind = AK_UNKNOWN; | |
28bf4b0b | 4532 | sRef_setNullStateN (s, NS_UNKNOWN); |
4533 | llassert (valueTable_isUndefined (s->state)); | |
16c024b5 | 4534 | s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc, SA_DECLARED)); |
28bf4b0b | 4535 | |
4536 | DPRINTF (("Result: [%p] %s", s, sRef_unparseFull (s))); | |
616915dd | 4537 | return s; |
4538 | } | |
4539 | ||
4540 | ||
4541 | bool | |
4542 | sRef_isNothing (sRef s) | |
4543 | { | |
4544 | return (sRef_isKindSpecial (s) && s->info->spec == SR_NOTHING); | |
4545 | } | |
4546 | ||
4547 | bool | |
4548 | sRef_isInternalState (sRef s) | |
4549 | { | |
4550 | return (sRef_isKindSpecial (s) && s->info->spec == SR_INTERNAL); | |
4551 | } | |
4552 | ||
4553 | bool | |
4554 | sRef_isSpecInternalState (sRef s) | |
4555 | { | |
4556 | return (sRef_isKindSpecial (s) | |
4557 | && (s->info->spec == SR_INTERNAL || s->info->spec == SR_SPECSTATE)); | |
4558 | } | |
4559 | ||
4560 | bool | |
4561 | sRef_isSpecState (sRef s) | |
4562 | { | |
4563 | return (sRef_isKindSpecial (s) && s->info->spec == SR_SPECSTATE); | |
4564 | } | |
4565 | ||
4566 | bool | |
4567 | sRef_isResult (sRef s) | |
4568 | { | |
6483a926 | 4569 | return (sRef_isReasonable (s) && s->kind == SK_RESULT); |
616915dd | 4570 | } |
4571 | ||
4572 | bool | |
4573 | sRef_isSystemState (sRef s) | |
4574 | { | |
4575 | return (sRef_isKindSpecial (s) && s->info->spec == SR_SYSTEM); | |
4576 | } | |
4577 | ||
28bf4b0b | 4578 | bool |
4579 | sRef_isGlobalMarker (sRef s) | |
4580 | { | |
4581 | return (sRef_isKindSpecial (s) && s->info->spec == SR_GLOBALMARKER); | |
4582 | } | |
4583 | ||
616915dd | 4584 | usymId |
4585 | sRef_getScopeIndex (sRef s) | |
4586 | { | |
6483a926 | 4587 | llassert (sRef_isReasonable (s)); |
616915dd | 4588 | llassert (sRef_isCvar (s)); |
4589 | ||
4590 | return (s->info->cvar->index); | |
4591 | } | |
4592 | ||
4593 | void | |
4594 | sRef_makeSafe (sRef s) | |
4595 | { | |
6483a926 | 4596 | if (sRef_isReasonable (s)) |
616915dd | 4597 | { |
4598 | s->safe = TRUE; | |
4599 | } | |
4600 | } | |
4601 | ||
4602 | void | |
4603 | sRef_makeUnsafe (sRef s) | |
4604 | { | |
6483a926 | 4605 | if (sRef_isReasonable (s)) |
616915dd | 4606 | { |
4607 | s->safe = FALSE; | |
4608 | } | |
4609 | } | |
4610 | ||
4611 | /* | |
4612 | ** memory state operations | |
4613 | */ | |
4614 | ||
4615 | /*@only@*/ cstring sRef_unparseFull (sRef s) | |
4616 | { | |
4617 | if (sRef_isInvalid (s)) return (cstring_undefined); | |
4618 | ||
16c024b5 | 4619 | return (message ("[%p] %q - %q { %q } [%s] { %q } < %q >", |
393e573f | 4620 | s, |
616915dd | 4621 | sRef_unparseDebug (s), |
4622 | sRef_unparseState (s), | |
16c024b5 | 4623 | stateInfo_unparse (s->definfo), |
616915dd | 4624 | exkind_unparse (s->oexpkind), |
28bf4b0b | 4625 | sRefSet_unparseDebug (s->deriv), |
4626 | valueTable_unparse (s->state))); | |
616915dd | 4627 | } |
4628 | ||
4629 | /*@unused@*/ cstring sRef_unparseDeep (sRef s) | |
4630 | { | |
4631 | cstring st = cstring_undefined; | |
4632 | ||
4633 | st = message ("%q:", sRef_unparseFull (s)); | |
4634 | ||
6483a926 | 4635 | if (sRef_isReasonable (s)) |
616915dd | 4636 | { |
4637 | sRefSet_allElements (s->deriv, el) | |
4638 | { | |
4639 | st = message("%q\n%q", st, sRef_unparseDeep (el)); | |
4640 | } end_sRefSet_allElements ; | |
4641 | } | |
4642 | ||
4643 | return st; | |
4644 | } | |
4645 | ||
4646 | /*@only@*/ cstring sRef_unparseState (sRef s) | |
4647 | { | |
4648 | if (sRef_isConj (s)) | |
4649 | { | |
4650 | return (message ("%q | %q", | |
4651 | sRef_unparseState (s->info->conj->a), | |
4652 | sRef_unparseState (s->info->conj->b))); | |
4653 | } | |
4654 | ||
4655 | if (sRef_isInvalid (s)) | |
4656 | { | |
4657 | return (cstring_makeLiteral ("<invalid>")); | |
4658 | } | |
4659 | ||
4660 | return (message ("%s.%s.%s.%s", | |
4661 | alkind_unparse (s->aliaskind), | |
28bf4b0b | 4662 | nstate_unparse (sRef_getNullState (s)), |
616915dd | 4663 | exkind_unparse (s->expkind), |
4664 | sstate_unparse (s->defstate))); | |
4665 | } | |
4666 | ||
4667 | bool sRef_isNotUndefined (sRef s) | |
4668 | { | |
4669 | return (sRef_isInvalid (s) | |
4670 | || (s->defstate != SS_UNDEFINED | |
4671 | && s->defstate != SS_UNUSEABLE | |
4672 | && s->defstate != SS_DEAD)); | |
4673 | } | |
4674 | ||
4675 | ynm sRef_isWriteable (sRef s) | |
4676 | { | |
4677 | if (sRef_isInvalid (s)) return MAYBE; | |
4678 | ||
4679 | if (sRef_isConj (s) && s->defstate == SS_UNKNOWN) | |
4680 | { | |
4681 | if (ynm_toBoolStrict (sRef_isWriteable (sRef_getConjA (s)))) | |
4682 | { | |
4683 | if (ynm_toBoolStrict (sRef_isWriteable (sRef_getConjB (s)))) | |
4684 | { | |
4685 | return YES; | |
4686 | } | |
4687 | return MAYBE; | |
4688 | } | |
4689 | else | |
4690 | { | |
4691 | if (ynm_toBoolStrict (sRef_isWriteable (sRef_getConjB (s)))) | |
4692 | { | |
4693 | return MAYBE; | |
4694 | } | |
4695 | return NO; | |
4696 | } | |
4697 | } | |
4698 | ||
4699 | return (ynm_fromBool (s->defstate != SS_UNUSEABLE)); | |
4700 | } | |
4701 | ||
4702 | bool sRef_hasNoStorage (sRef s) | |
4703 | { | |
4704 | return (!sRef_isAllocatedStorage (s) || sRef_isDefinitelyNull (s)); | |
4705 | } | |
4706 | ||
4707 | bool sRef_isStrictReadable (sRef s) | |
4708 | { | |
3e3ec469 | 4709 | return (ynm_toBoolStrict (sRef_isValidLvalue (s))); |
616915dd | 4710 | } |
4711 | ||
3e3ec469 | 4712 | /* |
4713 | ** Is this what is does? | |
4714 | ** Returns YES if s can be used as an rvalue, | |
4715 | ** MAYBE if its not clear | |
4716 | ** NO if s cannot be safely used as an rvalue. | |
4717 | */ | |
4718 | ||
4719 | ynm sRef_isValidLvalue (sRef s) | |
616915dd | 4720 | { |
4721 | sstate ss; | |
4722 | ||
4723 | if (sRef_isInvalid (s)) return YES; | |
4724 | ||
4725 | ss = s->defstate; | |
4726 | ||
4727 | if (sRef_isConj (s) && s->defstate == SS_UNKNOWN) | |
4728 | { | |
3e3ec469 | 4729 | if (ynm_toBoolStrict (sRef_isValidLvalue (sRef_getConjA (s)))) |
616915dd | 4730 | { |
3e3ec469 | 4731 | if (ynm_toBoolStrict (sRef_isValidLvalue (sRef_getConjB (s)))) |
616915dd | 4732 | { |
4733 | return YES; | |
4734 | } | |
4735 | return MAYBE; | |
4736 | } | |
4737 | else | |
4738 | { | |
3e3ec469 | 4739 | if (ynm_toBoolStrict (sRef_isValidLvalue (sRef_getConjB (s)))) |
616915dd | 4740 | { |
4741 | return MAYBE; | |
4742 | } | |
4743 | return NO; | |
4744 | } | |
4745 | } | |
4746 | else if (ss == SS_HOFFA) | |
4747 | { | |
4748 | if (context_getFlag (FLG_STRICTUSERELEASED)) | |
4749 | { | |
4750 | return MAYBE; | |
4751 | } | |
4752 | else | |
4753 | { | |
4754 | return YES; | |
4755 | } | |
4756 | } | |
4757 | else | |
4758 | { | |
4759 | return (ynm_fromBool (ss == SS_DEFINED | |
4760 | || ss == SS_FIXED | |
4761 | || ss == SS_RELDEF | |
4762 | || ss == SS_PDEFINED | |
3e3ec469 | 4763 | || ss == SS_PARTIAL |
616915dd | 4764 | || ss == SS_SPECIAL |
3e3ec469 | 4765 | || ss == SS_ALLOCATED |
28bf4b0b | 4766 | || ss == SS_KILLED /* evans 2001-05-26: added this for killed globals */ |
616915dd | 4767 | || ss == SS_UNKNOWN)); |
4768 | } | |
4769 | } | |
4770 | ||
4771 | static /*@exposed@*/ sRef whatUndefined (/*@exposed@*/ sRef fref, int depth) | |
4772 | { | |
4773 | ctype ct; | |
4774 | ||
4775 | ||
4776 | if (depth > MAXDEPTH) | |
4777 | { | |
4778 | llgenmsg (message | |
4779 | ("Warning: check definition limit exceeded, checking %q. " | |
4780 | "This either means there is a variable with at least " | |
4781 | "%d indirections apparent in the program text, or " | |
11db3170 | 4782 | "there is a bug in Splint.", |
616915dd | 4783 | sRef_unparse (fref), |
4784 | MAXDEPTH), | |
4785 | g_currentloc); | |
4786 | ||
4787 | return sRef_undefined; | |
4788 | } | |
4789 | ||
4790 | if (!sRef_isKnown (fref) || sRef_isAnyDefined (fref)) | |
4791 | { | |
4792 | return sRef_undefined; | |
4793 | } | |
4794 | ||
4795 | if (sRef_isUnuseable (fref) || sRef_isStateUndefined (fref)) | |
4796 | { | |
4797 | return fref; | |
4798 | } | |
4799 | ||
4800 | ct = ctype_realType (sRef_getType (fref)); | |
4801 | ||
4802 | if (ctype_isUnknown (ct)) | |
4803 | { | |
4804 | return sRef_undefined; | |
4805 | } | |
4806 | else if (ctype_isPointer (ct) || ctype_isArray (ct)) | |
4807 | { | |
4808 | if (sRef_isStateUnknown (fref)) | |
4809 | { | |
4810 | return sRef_undefined; | |
4811 | } | |
4812 | else | |
4813 | { | |
4814 | sRef fptr = sRef_constructDeref (fref); | |
4815 | ||
4816 | return (whatUndefined (fptr, depth + 1)); | |
4817 | } | |
4818 | } | |
4819 | else if (ctype_isStruct (ct)) | |
4820 | { | |
4821 | bool hasOneDefined = FALSE; | |
4822 | ||
4823 | if (sRef_isStateUnknown (fref)) | |
4824 | { | |
4825 | return fref; | |
4826 | } | |
4827 | ||
4828 | if (sRef_isPdefined (fref) || sRef_isAnyDefined (fref)) | |
4829 | { | |
4830 | sRefSet_realElements (sRef_derivedFields (fref), sr) | |
4831 | { | |
4832 | hasOneDefined = TRUE; | |
4833 | ||
4834 | if (sRef_isField (sr)) | |
4835 | { | |
4836 | cstring fieldname = sRef_getField (sr); | |
4837 | sRef fldref = sRef_makeField (fref, fieldname); | |
4838 | bool shouldCheck = !sRef_isRecursiveField (fldref); | |
4839 | ||
4840 | if (shouldCheck) | |
4841 | { | |
4842 | sRef wdef = whatUndefined (fldref, depth + 1); | |
4843 | ||
6483a926 | 4844 | if (sRef_isReasonable (wdef)) |
616915dd | 4845 | { |
4846 | return wdef; | |
4847 | } | |
4848 | } | |
4849 | } | |
4850 | } end_sRefSet_realElements; | |
4851 | } | |
4852 | else if (sRef_isAllocated (fref)) | |
4853 | { | |
4854 | /* | |
4855 | ** for structures, each field must be completely defined | |
4856 | */ | |
4857 | ||
4858 | uentryList fields = ctype_getFields (ct); | |
4859 | ||
4860 | uentryList_elements (fields, ue) | |
4861 | { | |
4862 | cstring name = uentry_getRealName (ue); | |
4863 | sRef ffield = sRef_makeField (fref, name); | |
4864 | bool shouldCheck = !sRef_isRecursiveField (ffield); | |
4865 | ||
4866 | if (sRef_isRelDef (uentry_getSref (ue))) | |
4867 | { | |
4868 | ; /* no error */ | |
4869 | } | |
4870 | else | |
4871 | { | |
4872 | if (shouldCheck) | |
4873 | { | |
4874 | sRef wdef = whatUndefined (ffield, depth + 1); | |
4875 | ||
4876 | if (sRef_isInvalid (wdef)) | |
4877 | { | |
4878 | return wdef; | |
4879 | } | |
4880 | } | |
4881 | } | |
4882 | } end_uentryList_elements; | |
4883 | } | |
4884 | else | |
4885 | { | |
4886 | ; | |
4887 | } | |
4888 | } | |
4889 | else if (ctype_isUnion (ct)) | |
4890 | { | |
4891 | ; | |
4892 | } | |
4893 | else | |
4894 | { | |
4895 | ; | |
4896 | } | |
4897 | ||
4898 | return sRef_undefined; | |
4899 | } | |
4900 | ||
28bf4b0b | 4901 | static bool checkDefined (/*@temp@*/ sRef sr) |
616915dd | 4902 | { |
28bf4b0b | 4903 | /*@-temptrans@*/ /* the result from whatUndefined is lost */ |
616915dd | 4904 | return (sRef_isInvalid (whatUndefined (sr, 0))); |
28bf4b0b | 4905 | /*@=temptrans@*/ |
616915dd | 4906 | } |
4907 | ||
4908 | bool sRef_isReallyDefined (sRef s) | |
4909 | { | |
6483a926 | 4910 | if (sRef_isReasonable (s)) |
616915dd | 4911 | { |
4912 | if (sRef_isAnyDefined (s)) | |
4913 | { | |
4914 | return TRUE; | |
4915 | } | |
4916 | else | |
4917 | { | |
4918 | if (sRef_isAllocated (s) || sRef_isPdefined (s)) | |
4919 | { | |
4920 | return checkDefined (s); | |
4921 | } | |
4922 | else | |
4923 | { | |
4924 | return FALSE; | |
4925 | } | |
4926 | } | |
4927 | } | |
4928 | else | |
4929 | { | |
4930 | return TRUE; | |
4931 | } | |
4932 | } | |
4933 | ||
4934 | void sRef_showNotReallyDefined (sRef s) | |
4935 | { | |
6483a926 | 4936 | if (sRef_isReasonable (s)) |
616915dd | 4937 | { |
4938 | if (sRef_isAnyDefined (s)) | |
4939 | { | |
4940 | BADBRANCH; | |
4941 | } | |
4942 | else | |
4943 | { | |
4944 | if (sRef_isAllocated (s) || sRef_isPdefined (s)) | |
4945 | { | |
28bf4b0b | 4946 | /*@-temptrans@*/ /* the result of whatUndefined is lost */ |
616915dd | 4947 | sRef ref = whatUndefined (s, 0); |
4948 | ||
6483a926 | 4949 | llassert (sRef_isReasonable (ref)); |
616915dd | 4950 | |
4951 | if (ref != s) | |
4952 | { | |
4953 | llgenindentmsgnoloc | |
4954 | (message ("This sub-reference is %s: %q", | |
4955 | sstate_unparse (sRef_getDefState (ref)), | |
4956 | sRef_unparse (ref))); | |
4957 | } | |
4958 | } | |
4959 | else | |
4960 | { | |
4961 | ; | |
4962 | } | |
4963 | } | |
4964 | } | |
4965 | else | |
4966 | { | |
4967 | BADBRANCH; | |
4968 | } | |
4969 | } | |
4970 | ||
4971 | sstate sRef_getDefState (sRef s) | |
4972 | { | |
4973 | if (sRef_isInvalid (s)) return (SS_UNKNOWN); | |
4974 | return (s->defstate); | |
4975 | } | |
4976 | ||
4977 | void sRef_setDefState (sRef s, sstate defstate, fileloc loc) | |
4978 | { | |
28bf4b0b | 4979 | sRef_checkMutable (s); |
616915dd | 4980 | sRef_setStateAux (s, defstate, loc); |
4981 | } | |
4982 | ||
4983 | static void sRef_clearAliasStateAux (sRef s, fileloc loc) | |
4984 | { | |
28bf4b0b | 4985 | sRef_checkMutable (s); |
616915dd | 4986 | sRef_setAliasKind (s, AK_ERROR, loc); |
4987 | } | |
4988 | ||
4989 | void sRef_clearAliasState (sRef s, fileloc loc) | |
4990 | { | |
28bf4b0b | 4991 | sRef_checkMutable (s); |
616915dd | 4992 | sRef_aliasSetComplete (sRef_clearAliasStateAux, s, loc); |
4993 | } | |
4994 | ||
4995 | void sRef_setAliasKindComplete (sRef s, alkind kind, fileloc loc) | |
4996 | { | |
28bf4b0b | 4997 | sRef_checkMutable (s); |
68de3f33 | 4998 | sRef_aliasSetCompleteAlkParam (sRef_setAliasKind, s, kind, loc); |
616915dd | 4999 | } |
5000 | ||
5001 | void sRef_setAliasKind (sRef s, alkind kind, fileloc loc) | |
5002 | { | |
28bf4b0b | 5003 | sRef_checkMutable (s); |
5004 | ||
6483a926 | 5005 | if (sRef_isReasonable (s)) |
616915dd | 5006 | { |
5007 | sRef_clearDerived (s); | |
5008 | ||
5009 | if ((kind != s->aliaskind && kind != s->oaliaskind) | |
5010 | && fileloc_isDefined (loc)) | |
5011 | { | |
16c024b5 | 5012 | s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, stateAction_fromAlkind (kind), loc); |
616915dd | 5013 | } |
5014 | ||
5015 | s->aliaskind = kind; | |
5016 | } | |
5017 | } | |
5018 | ||
5019 | void sRef_setOrigAliasKind (sRef s, alkind kind) | |
5020 | { | |
28bf4b0b | 5021 | sRef_checkMutable (s); |
5022 | ||
6483a926 | 5023 | if (sRef_isReasonable (s)) |
616915dd | 5024 | { |
5025 | s->oaliaskind = kind; | |
5026 | } | |
5027 | } | |
5028 | ||
5029 | exkind sRef_getExKind (sRef s) | |
5030 | { | |
6483a926 | 5031 | if (sRef_isReasonable (s)) |
616915dd | 5032 | { |
5033 | return (s->expkind); | |
5034 | } | |
5035 | else | |
5036 | { | |
5037 | return XO_UNKNOWN; | |
5038 | } | |
5039 | } | |
5040 | ||
5041 | exkind sRef_getOrigExKind (sRef s) | |
5042 | { | |
6483a926 | 5043 | if (sRef_isReasonable (s)) |
616915dd | 5044 | { |
5045 | return (s->oexpkind); | |
5046 | } | |
5047 | else | |
5048 | { | |
5049 | return XO_UNKNOWN; | |
5050 | } | |
5051 | } | |
5052 | ||
5053 | static void sRef_clearExKindAux (sRef s, fileloc loc) | |
5054 | { | |
28bf4b0b | 5055 | sRef_checkMutable (s); |
616915dd | 5056 | sRef_setExKind (s, XO_UNKNOWN, loc); |
5057 | } | |
5058 | ||
5059 | void sRef_setObserver (sRef s, fileloc loc) | |
5060 | { | |
28bf4b0b | 5061 | sRef_checkMutable (s); |
616915dd | 5062 | sRef_setExKind (s, XO_OBSERVER, loc); |
5063 | } | |
5064 | ||
5065 | void sRef_setExposed (sRef s, fileloc loc) | |
5066 | { | |
28bf4b0b | 5067 | sRef_checkMutable (s); |
616915dd | 5068 | sRef_setExKind (s, XO_EXPOSED, loc); |
5069 | } | |
5070 | ||
5071 | void sRef_clearExKindComplete (sRef s, fileloc loc) | |
5072 | { | |
5073 | (void) sRef_aliasSetComplete (sRef_clearExKindAux, s, loc); | |
5074 | } | |
5075 | ||
5076 | void sRef_setExKind (sRef s, exkind exp, fileloc loc) | |
5077 | { | |
28bf4b0b | 5078 | sRef_checkMutable (s); |
5079 | ||
6483a926 | 5080 | if (sRef_isReasonable (s)) |
616915dd | 5081 | { |
5082 | if (s->expkind != exp) | |
5083 | { | |
16c024b5 | 5084 | s->expinfo = stateInfo_updateLoc (s->expinfo, stateAction_fromExkind (exp), loc); |
616915dd | 5085 | } |
5086 | ||
5087 | s->expkind = exp; | |
5088 | } | |
5089 | } | |
5090 | ||
5091 | /* | |
5092 | ** s1->derived = s2->derived | |
5093 | */ | |
5094 | ||
5095 | static void sRef_copyRealDerived (sRef s1, sRef s2) | |
5096 | { | |
28bf4b0b | 5097 | DPRINTF (("Copy real: %s / %s", sRef_unparse (s1), sRef_unparse (s2))); |
5098 | sRef_checkMutable (s1); | |
5099 | ||
6483a926 | 5100 | if (sRef_isReasonable (s1) && sRef_isReasonable (s2)) |
616915dd | 5101 | { |
5102 | sRef sb = sRef_getRootBase (s1); | |
5103 | ||
5104 | sRefSet_clear (s1->deriv); | |
5105 | ||
5106 | sRefSet_allElements (s2->deriv, el) | |
5107 | { | |
6483a926 | 5108 | if (sRef_isReasonable (el)) |
616915dd | 5109 | { |
5110 | sRef rb = sRef_getRootBase (el); | |
5111 | ||
5112 | if (!sRef_same (rb, sb)) | |
5113 | { | |
5114 | sRef fb = sRef_fixDirectBase (el, s1); | |
5115 | ||
6483a926 | 5116 | if (sRef_isReasonable (fb)) |
616915dd | 5117 | { |
5118 | sRef_copyRealDerived (fb, el); | |
5119 | sRef_addDeriv (s1, fb); | |
5120 | } | |
5121 | } | |
5122 | else | |
5123 | { | |
5124 | sRef_addDeriv (s1, el); | |
5125 | } | |
5126 | } | |
5127 | } end_sRefSet_allElements ; | |
5128 | } | |
5129 | ||
5130 | } | |
5131 | ||
5132 | void sRef_copyRealDerivedComplete (sRef s1, sRef s2) | |
5133 | { | |
5134 | sRef_innerAliasSetCompleteParam (sRef_copyRealDerived, s1, s2); | |
5135 | } | |
5136 | ||
5137 | void sRef_setUndefined (sRef s, fileloc loc) | |
5138 | { | |
28bf4b0b | 5139 | sRef_checkMutable (s); |
5140 | ||
6483a926 | 5141 | if (sRef_isReasonable (s)) |
616915dd | 5142 | { |
5143 | s->defstate = SS_UNDEFINED; | |
16c024b5 | 5144 | s->definfo = stateInfo_updateLoc (s->definfo, SA_UNDEFINED, loc); |
616915dd | 5145 | |
5146 | sRef_clearDerived (s); | |
5147 | } | |
5148 | } | |
5149 | ||
5150 | static void sRef_setDefinedAux (sRef s, fileloc loc, bool clear) | |
5151 | { | |
28bf4b0b | 5152 | sRef_checkMutable (s); |
616915dd | 5153 | if (sRef_isInvalid (s)) return; |
5154 | ||
3120b462 | 5155 | DPRINTF (("Set defined: %s", sRef_unparseFull (s))); |
5156 | ||
16c024b5 | 5157 | s->definfo = stateInfo_updateLoc (s->definfo, SA_DEFINED, loc); |
616915dd | 5158 | s->defstate = SS_DEFINED; |
5159 | ||
cd7d9b17 | 5160 | DPRINTF (("Set defined: %s", sRef_unparseFull (s))); |
5161 | ||
616915dd | 5162 | /* e.g., if x is allocated, *x = 3 defines x */ |
5163 | ||
5164 | if (s->kind == SK_PTR) | |
5165 | { | |
5166 | sRef p = s->info->ref; | |
3120b462 | 5167 | sRef arr; |
5168 | ||
5169 | if (p->defstate == SS_ALLOCATED | |
5170 | || p->defstate == SS_SPECIAL) /* evans 2001-07-12: shouldn't need this */ | |
616915dd | 5171 | { |
5172 | sRef_setDefinedAux (p, loc, clear); | |
5173 | } | |
3120b462 | 5174 | |
5175 | /* | |
5176 | ** Defines a[0] also: | |
5177 | */ | |
5178 | ||
5179 | arr = sRef_findDerivedArrayFetch (p, FALSE, 0, FALSE); | |
5180 | ||
6483a926 | 5181 | if (sRef_isReasonable (arr)) |
3120b462 | 5182 | { |
5183 | sRef_setDefinedAux (arr, loc, clear); | |
5184 | } | |
616915dd | 5185 | } |
5186 | else if (s->kind == SK_ARRAYFETCH) | |
5187 | { | |
5188 | if (!s->info->arrayfetch->indknown | |
5189 | || (s->info->arrayfetch->ind == 0)) | |
5190 | { | |
5191 | sRef p = s->info->arrayfetch->arr; | |
5192 | sRef ptr = sRef_constructPointer (p); | |
3120b462 | 5193 | |
6483a926 | 5194 | if (sRef_isReasonable (ptr)) |
616915dd | 5195 | { |
5196 | if (ptr->defstate == SS_ALLOCATED | |
3120b462 | 5197 | || ptr->defstate == SS_UNDEFINED |
5198 | || ptr->defstate == SS_SPECIAL) /* evans 2001-07-12: shouldn't need this */ | |
616915dd | 5199 | { |
5200 | sRef_setDefinedAux (ptr, loc, clear); | |
5201 | } | |
5202 | } | |
5203 | ||
5204 | if (p->defstate == SS_RELDEF) | |
5205 | { | |
5206 | ; | |
5207 | } | |
3120b462 | 5208 | else if (p->defstate == SS_ALLOCATED || p->defstate == SS_PDEFINED |
5209 | || p->defstate == SS_SPECIAL) /* evans 2001-07-12: shouldn't need this */ | |
616915dd | 5210 | { |
5211 | p->defstate = SS_DEFINED; | |
5212 | } | |
5213 | else | |
5214 | { | |
5215 | } | |
5216 | } | |
5217 | } | |
5218 | else if (s->kind == SK_FIELD) | |
5219 | { | |
5220 | sRef parent = s->info->field->rec; | |
5221 | ||
6483a926 | 5222 | if (sRef_isReasonable (parent)) |
616915dd | 5223 | { |
5224 | if (ctype_isUnion (ctype_realType (parent->type))) | |
5225 | { | |
5226 | /* | |
5227 | ** Should not clear derived from here. | |
5228 | */ | |
5229 | ||
5230 | sRef_setDefinedNoClear (parent, loc); | |
5231 | } | |
5232 | else | |
5233 | { | |
5234 | ; /* Nothing to do for structures. */ | |
5235 | } | |
5236 | } | |
5237 | ||
5238 | } | |
5239 | else | |
5240 | { | |
5241 | ; | |
5242 | } | |
5243 | ||
5244 | if (clear) | |
5245 | { | |
5246 | sRef_clearDerived (s); | |
cd7d9b17 | 5247 | } |
5248 | else | |
5249 | { | |
5250 | /* evans 2001-07-12: need to define the derived references */ | |
5251 | sRefSet_elements (s->deriv, el) | |
5252 | { | |
6483a926 | 5253 | llassert (sRef_isReasonable (el)); |
cd7d9b17 | 5254 | el->defstate = SS_DEFINED; |
5255 | } end_sRefSet_elements ; | |
5256 | } | |
16c024b5 | 5257 | |
cd7d9b17 | 5258 | DPRINTF (("Set defined: %s", sRef_unparseFull (s))); |
616915dd | 5259 | } |
5260 | ||
5261 | static void sRef_setPartialDefined (sRef s, fileloc loc) | |
5262 | { | |
28bf4b0b | 5263 | sRef_checkMutable (s); |
5264 | ||
616915dd | 5265 | if (!sRef_isPartial (s)) |
5266 | { | |
5267 | sRef_setDefined (s, loc); | |
5268 | } | |
5269 | } | |
5270 | ||
5271 | void sRef_setPartialDefinedComplete (sRef s, fileloc loc) | |
5272 | { | |
5273 | sRef_innerAliasSetComplete (sRef_setPartialDefined, s, loc); | |
5274 | } | |
5275 | ||
5276 | void sRef_setDefinedComplete (sRef s, fileloc loc) | |
5277 | { | |
2e127cb8 | 5278 | sRef_innerAliasSetComplete (sRef_setDefined, s, loc); |
5279 | } | |
5280 | ||
5281 | void sRef_setDefinedCompleteDirect (sRef s, fileloc loc) | |
5282 | { | |
5283 | sRefSet aliases; | |
5284 | ||
5285 | aliases = usymtab_allAliases (s); | |
3120b462 | 5286 | DPRINTF (("Set defined complete: %s", sRef_unparseFull (s))); |
2e127cb8 | 5287 | DPRINTF (("All aliases: %s", sRefSet_unparseFull (aliases))); |
5288 | ||
5289 | sRef_setDefined (s, loc); | |
5290 | ||
5291 | sRefSet_realElements (aliases, current) | |
5292 | { | |
6483a926 | 5293 | if (sRef_isReasonable (current)) |
2e127cb8 | 5294 | { |
5295 | current = sRef_updateSref (current); | |
5296 | sRef_setDefined (current, loc); | |
5297 | } | |
5298 | } end_sRefSet_realElements; | |
5299 | ||
5300 | sRefSet_free (aliases); | |
616915dd | 5301 | sRef_innerAliasSetComplete (sRef_setDefined, s, loc); |
5302 | } | |
5303 | ||
5304 | void sRef_setDefined (sRef s, fileloc loc) | |
5305 | { | |
28bf4b0b | 5306 | sRef_checkMutable (s); |
616915dd | 5307 | sRef_setDefinedAux (s, loc, TRUE); |
5308 | } | |
5309 | ||
5310 | static void sRef_setDefinedNoClear (sRef s, fileloc loc) | |
5311 | { | |
28bf4b0b | 5312 | sRef_checkMutable (s); |
616915dd | 5313 | DPRINTF (("Defining: %s", sRef_unparseFull (s))); |
5314 | sRef_setDefinedAux (s, loc, FALSE); | |
5315 | DPRINTF (("==> %s", sRef_unparseFull (s))); | |
5316 | } | |
5317 | ||
5318 | void sRef_setDefinedNCComplete (sRef s, fileloc loc) | |
5319 | { | |
28bf4b0b | 5320 | sRef_checkMutable (s); |
616915dd | 5321 | DPRINTF (("Set Defined Complete: %s", sRef_unparseFull (s))); |
5322 | sRef_innerAliasSetComplete (sRef_setDefinedNoClear, s, loc); | |
5323 | DPRINTF (("==> %s", sRef_unparseFull (s))); | |
5324 | } | |
5325 | ||
5326 | static bool sRef_isDeepUnionField (sRef s) | |
5327 | { | |
5328 | return (sRef_deepPred (sRef_isUnionField, s)); | |
5329 | } | |
5330 | ||
5331 | bool sRef_isUnionField (sRef s) | |
5332 | { | |
6483a926 | 5333 | if (sRef_isReasonable (s) && s->kind == SK_FIELD) |
616915dd | 5334 | { |
5335 | /* | |
5336 | ** defining one field of a union defines the union | |
5337 | */ | |
5338 | ||
5339 | sRef base = s->info->field->rec; | |
5340 | ||
6483a926 | 5341 | if (sRef_isReasonable (base)) |
616915dd | 5342 | { |
5343 | return (ctype_isUnion (ctype_realType (base->type))); | |
5344 | } | |
5345 | } | |
5346 | ||
5347 | return FALSE; | |
5348 | } | |
5349 | ||
5350 | void sRef_setPdefined (sRef s, fileloc loc) | |
5351 | { | |
28bf4b0b | 5352 | sRef_checkMutable (s); |
6483a926 | 5353 | if (sRef_isReasonable (s) && !sRef_isPartial (s)) |
616915dd | 5354 | { |
5355 | sRef base = sRef_getBaseSafe (s); | |
5356 | ||
5357 | if (s->defstate == SS_ALLOCATED) | |
5358 | { | |
5359 | return; | |
5360 | } | |
5361 | ||
16c024b5 | 5362 | s->definfo = stateInfo_updateLoc (s->definfo, SA_PDEFINED, loc); |
616915dd | 5363 | s->defstate = SS_PDEFINED; |
5364 | ||
5365 | /* e.g., if x is allocated, *x = 3 defines x */ | |
5366 | ||
6483a926 | 5367 | while (sRef_isReasonable (base) && sRef_isKnown (base)) |
616915dd | 5368 | { |
5369 | if (base->defstate == SS_DEFINED) | |
5370 | { | |
5371 | sRef nb; | |
28bf4b0b | 5372 | |
27c9e640 | 5373 | DPRINTF (("set pdefined: %s", sRef_unparseFull (base))); |
28bf4b0b | 5374 | base->defstate = SS_PDEFINED; |
616915dd | 5375 | nb = sRef_getBaseSafe (base); |
5376 | base = nb; | |
5377 | } | |
5378 | else | |
5379 | { | |
5380 | break; | |
5381 | } | |
5382 | } | |
5383 | } | |
5384 | } | |
5385 | ||
5386 | static void sRef_setStateAux (sRef s, sstate ss, fileloc loc) | |
5387 | { | |
28bf4b0b | 5388 | sRef_checkMutable (s); |
5389 | ||
16c024b5 | 5390 | DPRINTF (("Set state: %s => %s", sRef_unparseFull (s), sstate_unparse (ss))); |
5391 | ||
6483a926 | 5392 | if (sRef_isReasonable (s)) |
616915dd | 5393 | { |
5394 | /* if (s->defstate == SS_RELDEF) return; */ | |
5395 | ||
5396 | if (s->defstate != ss && fileloc_isDefined (loc)) | |
5397 | { | |
16c024b5 | 5398 | s->definfo = stateInfo_updateLoc (s->definfo, |
5399 | stateAction_fromSState (ss), loc); | |
616915dd | 5400 | } |
5401 | ||
5402 | s->defstate = ss; | |
5403 | sRef_clearDerived (s); | |
5404 | ||
5405 | if (ss == SS_ALLOCATED) | |
5406 | { | |
5407 | sRef base = sRef_getBaseSafe (s); | |
5408 | ||
6483a926 | 5409 | while (sRef_isReasonable (base) && sRef_isKnown (base)) |
616915dd | 5410 | { |
5411 | if (base->defstate == SS_DEFINED) | |
5412 | { | |
5413 | sRef nb; | |
27c9e640 | 5414 | |
5415 | DPRINTF (("set pdefined: %s", sRef_unparseFull (s))); | |
616915dd | 5416 | base->defstate = SS_PDEFINED; |
616915dd | 5417 | nb = sRef_getBaseSafe (base); |
5418 | base = nb; | |
5419 | } | |
5420 | else | |
5421 | { | |
5422 | break; | |
5423 | } | |
5424 | } | |
5425 | } | |
27c9e640 | 5426 | } |
616915dd | 5427 | } |
5428 | ||
5429 | void sRef_setAllocatedComplete (sRef s, fileloc loc) | |
5430 | { | |
5431 | sRef_innerAliasSetComplete (sRef_setAllocated, s, loc); | |
5432 | } | |
5433 | ||
5434 | static void sRef_setAllocatedShallow (sRef s, fileloc loc) | |
5435 | { | |
28bf4b0b | 5436 | sRef_checkMutable (s); |
5437 | ||
6483a926 | 5438 | if (sRef_isReasonable (s)) |
616915dd | 5439 | { |
5440 | if (s->defstate == SS_DEAD || s->defstate == SS_UNDEFINED) | |
5441 | { | |
5442 | s->defstate = SS_ALLOCATED; | |
16c024b5 | 5443 | s->definfo = stateInfo_updateLoc (s->definfo, SA_ALLOCATED, loc); |
616915dd | 5444 | } |
5445 | } | |
5446 | } | |
5447 | ||
5448 | void sRef_setAllocatedShallowComplete (sRef s, fileloc loc) | |
5449 | { | |
5450 | sRef_innerAliasSetComplete (sRef_setAllocatedShallow, s, loc); | |
5451 | } | |
5452 | ||
5453 | void sRef_setAllocated (sRef s, fileloc loc) | |
5454 | { | |
28bf4b0b | 5455 | sRef_checkMutable (s); |
616915dd | 5456 | sRef_setStateAux (s, SS_ALLOCATED, loc); |
28bf4b0b | 5457 | } |
616915dd | 5458 | |
5459 | void sRef_setPartial (sRef s, fileloc loc) | |
5460 | { | |
28bf4b0b | 5461 | sRef_checkMutable (s); |
616915dd | 5462 | sRef_setStateAux (s, SS_PARTIAL, loc); |
28bf4b0b | 5463 | } |
616915dd | 5464 | |
5465 | void sRef_setShared (sRef s, fileloc loc) | |
5466 | { | |
28bf4b0b | 5467 | sRef_checkMutable (s); |
5468 | ||
6483a926 | 5469 | if (sRef_isReasonable (s)) |
616915dd | 5470 | { |
5471 | if (s->aliaskind != AK_SHARED && fileloc_isDefined (loc)) | |
5472 | { | |
16c024b5 | 5473 | s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, SA_SHARED, loc); |
616915dd | 5474 | } |
5475 | ||
5476 | s->aliaskind = AK_SHARED; | |
5477 | /* don't! sRef_clearDerived (s); */ | |
5478 | } | |
5479 | } | |
5480 | ||
28bf4b0b | 5481 | void sRef_setLastReference (sRef s, /*@exposed@*/ sRef ref, fileloc loc) |
616915dd | 5482 | { |
28bf4b0b | 5483 | sRef_checkMutable (s); |
5484 | ||
6483a926 | 5485 | if (sRef_isReasonable (s)) |
616915dd | 5486 | { |
5487 | s->aliaskind = sRef_getAliasKind (ref); | |
16c024b5 | 5488 | s->aliasinfo = stateInfo_updateRefLoc (s->aliasinfo, ref, stateAction_fromAlkind (s->aliaskind), loc); |
616915dd | 5489 | } |
5490 | } | |
5491 | ||
5492 | static | |
5493 | void sRef_setNullStateAux (/*@notnull@*/ sRef s, nstate ns, fileloc loc) | |
5494 | { | |
28bf4b0b | 5495 | sRef_checkMutable (s); |
5496 | s->nullstate = ns; | |
60868d40 | 5497 | sRef_resetAliasKind (s); |
5498 | ||
28bf4b0b | 5499 | if (fileloc_isDefined (loc)) |
5500 | { | |
16c024b5 | 5501 | s->nullinfo = stateInfo_updateLoc (s->nullinfo, stateAction_fromNState (ns), loc); |
28bf4b0b | 5502 | } |
616915dd | 5503 | } |
5504 | ||
5505 | void sRef_setNotNull (sRef s, fileloc loc) | |
5506 | { | |
6483a926 | 5507 | if (sRef_isReasonable (s)) |
616915dd | 5508 | { |
5509 | sRef_setNullStateAux (s, NS_NOTNULL, loc); | |
5510 | } | |
5511 | } | |
5512 | ||
28bf4b0b | 5513 | void sRef_setNullStateN (sRef s, nstate n) |
5514 | { | |
6483a926 | 5515 | if (sRef_isReasonable (s)) |
abd7f895 | 5516 | { |
5517 | sRef_checkMutable (s); | |
5518 | s->nullstate = n; | |
5519 | sRef_resetAliasKind (s); | |
5520 | } | |
28bf4b0b | 5521 | } |
5522 | ||
616915dd | 5523 | void sRef_setNullState (sRef s, nstate n, fileloc loc) |
5524 | { | |
6483a926 | 5525 | if (sRef_isReasonable (s)) |
616915dd | 5526 | { |
5527 | sRef_setNullStateAux (s, n, loc); | |
5528 | } | |
5529 | } | |
5530 | ||
2e127cb8 | 5531 | void sRef_setNullTerminatedStateInnerComplete (sRef s, struct s_bbufinfo b, /*@unused@*/ fileloc loc) |
5532 | { | |
616915dd | 5533 | switch (b.bufstate) { |
abd7f895 | 5534 | case BB_NULLTERMINATED: |
5535 | sRef_setNullTerminatedState (s); | |
5536 | sRef_setLen (s, b.len); | |
5537 | break; | |
5538 | case BB_POSSIBLYNULLTERMINATED: | |
5539 | sRef_setPossiblyNullTerminatedState(s); | |
5540 | break; | |
5541 | case BB_NOTNULLTERMINATED: | |
5542 | sRef_setNotNullTerminatedState (s); | |
5543 | break; | |
616915dd | 5544 | } |
616915dd | 5545 | |
abd7f895 | 5546 | sRef_setSize (s, b.size); |
5547 | ||
616915dd | 5548 | /* PL: TO BE DONE : Aliases are not modified right now, have to be similar to |
5549 | * setNullStateInnerComplete. | |
5550 | */ | |
5551 | } | |
5552 | ||
5553 | void sRef_setNullStateInnerComplete (sRef s, nstate n, fileloc loc) | |
5554 | { | |
28bf4b0b | 5555 | DPRINTF (("Set null state: %s", nstate_unparse (n))); |
5556 | ||
616915dd | 5557 | sRef_setNullState (s, n, loc); |
28bf4b0b | 5558 | |
616915dd | 5559 | switch (n) |
5560 | { | |
5561 | case NS_POSNULL: | |
5562 | sRef_innerAliasSetComplete (sRef_setPosNull, s, loc); | |
5563 | break; | |
5564 | case NS_DEFNULL: | |
5565 | sRef_innerAliasSetComplete (sRef_setDefNull, s, loc); | |
5566 | break; | |
5567 | case NS_UNKNOWN: | |
5568 | sRef_innerAliasSetComplete (sRef_setNullUnknown, s, loc); | |
5569 | break; | |
5570 | case NS_NOTNULL: | |
5571 | sRef_innerAliasSetComplete (sRef_setNotNull, s, loc); | |
5572 | break; | |
5573 | case NS_MNOTNULL: | |
5574 | sRef_innerAliasSetComplete (sRef_setNotNull, s, loc); | |
5575 | break; | |
5576 | case NS_RELNULL: | |
5577 | sRef_innerAliasSetComplete (sRef_setNullUnknown, s, loc); | |
5578 | break; | |
5579 | case NS_CONSTNULL: | |
5580 | sRef_innerAliasSetComplete (sRef_setDefNull, s, loc); | |
5581 | break; | |
5582 | case NS_ABSNULL: | |
5583 | sRef_innerAliasSetComplete (sRef_setNullUnknown, s, loc); | |
5584 | break; | |
5585 | case NS_ERROR: | |
5586 | sRef_innerAliasSetComplete (sRef_setNullErrorLoc, s, loc); | |
5587 | break; | |
5588 | } | |
5589 | } | |
5590 | ||
5591 | void sRef_setPosNull (sRef s, fileloc loc) | |
5592 | { | |
6483a926 | 5593 | if (sRef_isReasonable (s)) |
616915dd | 5594 | { |
5595 | sRef_setNullStateAux (s, NS_POSNULL, loc); | |
5596 | } | |
5597 | } | |
5598 | ||
5599 | void sRef_setDefNull (sRef s, fileloc loc) | |
5600 | { | |
6483a926 | 5601 | if (sRef_isReasonable (s)) |
616915dd | 5602 | { |
5603 | sRef_setNullStateAux (s, NS_DEFNULL, loc); | |
5604 | } | |
5605 | } | |
5606 | ||
5607 | void sRef_setNullUnknown (sRef s, fileloc loc) | |
5608 | { | |
6483a926 | 5609 | if (sRef_isReasonable (s)) |
616915dd | 5610 | { |
5611 | sRef_setNullStateAux (s, NS_UNKNOWN, loc); | |
5612 | } | |
5613 | } | |
5614 | ||
5615 | void sRef_setNullError (sRef s) | |
5616 | { | |
02b84d4b | 5617 | if (sRef_isReasonable (s) && !sRef_isConst (s)) |
616915dd | 5618 | { |
5619 | sRef_setNullStateAux (s, NS_UNKNOWN, fileloc_undefined); | |
5620 | } | |
5621 | } | |
5622 | ||
02b84d4b | 5623 | void sRef_setNullErrorLoc (sRef s, fileloc loc) |
616915dd | 5624 | { |
02b84d4b | 5625 | if (sRef_isReasonable (s) && !sRef_isConst (s)) |
5626 | { | |
5627 | sRef_setNullStateAux (s, NS_UNKNOWN, loc); | |
5628 | } | |
616915dd | 5629 | } |
5630 | ||
5631 | void sRef_setOnly (sRef s, fileloc loc) | |
5632 | { | |
6483a926 | 5633 | if (sRef_isReasonable (s) && s->aliaskind != AK_ONLY) |
616915dd | 5634 | { |
02b84d4b | 5635 | sRef_checkMutable (s); |
616915dd | 5636 | s->aliaskind = AK_ONLY; |
16c024b5 | 5637 | s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, SA_ONLY, loc); |
02b84d4b | 5638 | } |
616915dd | 5639 | } |
5640 | ||
5641 | void sRef_setDependent (sRef s, fileloc loc) | |
5642 | { | |
6483a926 | 5643 | if (sRef_isReasonable (s) && !sRef_isConst (s) && (s->aliaskind != AK_DEPENDENT)) |
616915dd | 5644 | { |
02b84d4b | 5645 | sRef_checkMutable (s); |
28bf4b0b | 5646 | DPRINTF (("Setting dependent: %s", sRef_unparseFull (s))); |
616915dd | 5647 | s->aliaskind = AK_DEPENDENT; |
16c024b5 | 5648 | s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, SA_DEPENDENT, loc); |
28bf4b0b | 5649 | } |
616915dd | 5650 | } |
5651 | ||
5652 | void sRef_setOwned (sRef s, fileloc loc) | |
5653 | { | |
6483a926 | 5654 | if (sRef_isReasonable (s) && !sRef_isConst (s) && (s->aliaskind != AK_OWNED)) |
616915dd | 5655 | { |
02b84d4b | 5656 | sRef_checkMutable (s); |
616915dd | 5657 | s->aliaskind = AK_OWNED; |
16c024b5 | 5658 | s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, SA_OWNED, loc); |
28bf4b0b | 5659 | } |
616915dd | 5660 | } |
5661 | ||
5662 | void sRef_setKept (sRef s, fileloc loc) | |
5663 | { | |
6483a926 | 5664 | if (sRef_isReasonable (s) && !sRef_isConst (s) && (s->aliaskind != AK_KEPT)) |
616915dd | 5665 | { |
5666 | sRef base = sRef_getBaseSafe (s); | |
02b84d4b | 5667 | |
6483a926 | 5668 | while (sRef_isReasonable (base) && sRef_isKnown (base)) |
616915dd | 5669 | { |
5670 | if (base->defstate == SS_DEFINED) | |
5671 | { | |
02b84d4b | 5672 | sRef_checkMutable (base); |
616915dd | 5673 | base->defstate = SS_PDEFINED; |
27c9e640 | 5674 | base = sRef_getBaseSafe (base); |
616915dd | 5675 | } |
5676 | else | |
5677 | { | |
5678 | break; | |
5679 | } | |
616915dd | 5680 | } |
5681 | ||
02b84d4b | 5682 | sRef_checkMutable (s); |
616915dd | 5683 | s->aliaskind = AK_KEPT; |
16c024b5 | 5684 | s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, SA_KEPT, loc); |
28bf4b0b | 5685 | } |
616915dd | 5686 | } |
5687 | ||
5688 | static void sRef_setKeptAux (sRef s, fileloc loc) | |
5689 | { | |
5690 | if (!sRef_isShared (s)) | |
5691 | { | |
5692 | sRef_setKept (s, loc); | |
5693 | } | |
5694 | } | |
5695 | ||
5696 | static void sRef_setDependentAux (sRef s, fileloc loc) | |
5697 | { | |
5698 | if (!sRef_isShared (s)) | |
5699 | { | |
5700 | sRef_setDependent (s, loc); | |
5701 | } | |
5702 | } | |
5703 | ||
5704 | void sRef_setKeptComplete (sRef s, fileloc loc) | |
5705 | { | |
5706 | sRef_aliasSetComplete (sRef_setKeptAux, s, loc); | |
5707 | } | |
5708 | ||
5709 | void sRef_setDependentComplete (sRef s, fileloc loc) | |
5710 | { | |
5711 | sRef_aliasSetComplete (sRef_setDependentAux, s, loc); | |
5712 | } | |
5713 | ||
5714 | void sRef_setFresh (sRef s, fileloc loc) | |
5715 | { | |
02b84d4b | 5716 | if (sRef_isReasonable (s) && !sRef_isConst (s)) |
616915dd | 5717 | { |
02b84d4b | 5718 | sRef_checkMutable (s); |
616915dd | 5719 | s->aliaskind = AK_FRESH; |
16c024b5 | 5720 | s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, SA_CREATED, loc); |
6fcd0b1e | 5721 | DPRINTF (("SetFresh: %s", sRef_unparseFull (s))); |
616915dd | 5722 | } |
5723 | } | |
5724 | ||
5725 | void sRef_kill (sRef s, fileloc loc) | |
5726 | { | |
5727 | DPRINTF (("Kill: %s", sRef_unparseFull (s))); | |
5728 | ||
6483a926 | 5729 | if (sRef_isReasonable (s) && !sRef_isShared (s) && !sRef_isConst (s)) |
616915dd | 5730 | { |
5731 | sRef base = sRef_getBaseSafe (s); | |
02b84d4b | 5732 | sRef_checkMutable (s); |
5733 | ||
6483a926 | 5734 | while (sRef_isReasonable (base) && sRef_isKnown (base)) |
616915dd | 5735 | { |
5736 | if (base->defstate == SS_DEFINED) | |
5737 | { | |
02b84d4b | 5738 | sRef_checkMutable (base); |
616915dd | 5739 | base->defstate = SS_PDEFINED; |
5740 | base = sRef_getBaseSafe (base); | |
5741 | } | |
5742 | else | |
5743 | { | |
5744 | break; | |
5745 | } | |
616915dd | 5746 | } |
5747 | ||
5748 | s->aliaskind = s->oaliaskind; | |
5749 | s->defstate = SS_DEAD; | |
16c024b5 | 5750 | s->definfo = stateInfo_updateLoc (s->definfo, SA_KILLED, loc); |
5751 | DPRINTF (("State info: %s", stateInfo_unparse (s->definfo))); | |
616915dd | 5752 | sRef_clearDerived (s); |
5753 | } | |
5754 | } | |
5755 | ||
5756 | void sRef_maybeKill (sRef s, fileloc loc) | |
5757 | { | |
6483a926 | 5758 | if (sRef_isReasonable (s)) |
616915dd | 5759 | { |
5760 | sRef base = sRef_getBaseSafe (s); | |
02b84d4b | 5761 | sRef_checkMutable (s); |
616915dd | 5762 | |
6483a926 | 5763 | while (sRef_isReasonable (base) && sRef_isKnown (base)) |
616915dd | 5764 | { |
5765 | if (base->defstate == SS_DEFINED || base->defstate == SS_RELDEF) | |
5766 | { | |
02b84d4b | 5767 | sRef_checkMutable (base); |
616915dd | 5768 | base->defstate = SS_PDEFINED; |
28bf4b0b | 5769 | base = sRef_getBaseSafe (base); |
616915dd | 5770 | } |
5771 | else | |
5772 | { | |
28bf4b0b | 5773 | break; |
616915dd | 5774 | } |
5775 | ||
5776 | } | |
5777 | ||
5778 | s->aliaskind = s->oaliaskind; | |
5779 | s->defstate = SS_HOFFA; | |
16c024b5 | 5780 | s->definfo = stateInfo_updateLoc (s->definfo, SA_PKILLED, loc); |
5781 | DPRINTF (("State info: %s / %s", sRef_unparse (s), | |
5782 | stateInfo_unparse (s->definfo))); | |
616915dd | 5783 | sRef_clearDerived (s); |
5784 | } | |
5785 | ||
5786 | } | |
5787 | ||
5788 | /* | |
5789 | ** just for type checking... | |
5790 | */ | |
5791 | ||
5792 | static void sRef_killAux (sRef s, fileloc loc) | |
5793 | { | |
6483a926 | 5794 | if (sRef_isReasonable (s) && !sRef_isShared (s)) |
616915dd | 5795 | { |
5796 | if (sRef_isUnknownArrayFetch (s)) | |
5797 | { | |
5798 | sRef_maybeKill (s, loc); | |
5799 | } | |
5800 | else | |
5801 | { | |
28bf4b0b | 5802 | sRef_kill (s, loc); |
5803 | } | |
616915dd | 5804 | } |
5805 | } | |
5806 | ||
5807 | /* | |
5808 | ** kills s and all aliases to s | |
5809 | */ | |
5810 | ||
5811 | void sRef_killComplete (sRef s, fileloc loc) | |
5812 | { | |
5813 | DPRINTF (("Kill complete: %s", sRef_unparseFull (s))); | |
5814 | sRef_aliasSetComplete (sRef_killAux, s, loc); | |
5815 | } | |
5816 | ||
5817 | static bool sRef_equivalent (sRef s1, sRef s2) | |
5818 | { | |
5819 | return (sRef_compare (s1, s2) == 0); | |
5820 | } | |
5821 | ||
5822 | /* | |
5823 | ** returns an sRef that will not be free'd on function exit. | |
5824 | */ | |
5825 | ||
5826 | /*@only@*/ sRef sRef_saveCopy (sRef s) | |
5827 | { | |
5828 | sRef ret; | |
5829 | ||
6483a926 | 5830 | if (sRef_isReasonable (s)) |
616915dd | 5831 | { |
5832 | bool old = inFunction; | |
5833 | ||
5834 | /* | |
5835 | ** Exit the function scope, so this sRef is not | |
5836 | ** stored in the deallocation table. | |
5837 | */ | |
5838 | ||
5839 | inFunction = FALSE; | |
5840 | DPRINTF (("Copying sref: %s", sRef_unparseFull(s))); | |
5841 | ret = sRef_copy (s); | |
5842 | DPRINTF (("Copying ===>: %s", sRef_unparseFull(ret))); | |
5843 | inFunction = old; | |
5844 | } | |
5845 | else | |
5846 | { | |
5847 | ret = sRef_undefined; | |
5848 | } | |
5849 | ||
5850 | /*@-dependenttrans@*/ | |
5851 | return ret; | |
5852 | /*@=dependenttrans@*/ | |
5853 | } | |
5854 | ||
5855 | sRef sRef_copy (sRef s) | |
5856 | { | |
28bf4b0b | 5857 | if (sRef_isKindSpecial (s) && !sRef_isGlobalMarker (s)) |
616915dd | 5858 | { |
5859 | /*@-retalias@*/ | |
28bf4b0b | 5860 | return s; /* don't copy specials (except for global markers) */ |
616915dd | 5861 | /*@=retalias@*/ |
5862 | } | |
28bf4b0b | 5863 | |
6483a926 | 5864 | if (sRef_isReasonable (s)) |
616915dd | 5865 | { |
5866 | sRef t = sRef_alloc (); | |
5867 | ||
28bf4b0b | 5868 | DPRINTF (("Copying: [%p] %s", s, sRef_unparse (s))); |
5869 | DPRINTF (("Full: %s", sRef_unparseFull (s))); | |
5870 | ||
616915dd | 5871 | t->kind = s->kind; |
5872 | t->safe = s->safe; | |
5873 | t->modified = s->modified; | |
28bf4b0b | 5874 | t->immut = FALSE; /* Note mutability is not copied. */ |
616915dd | 5875 | t->type = s->type; |
b9904f57 | 5876 | t->val = multiVal_copy (s->val); |
616915dd | 5877 | |
28bf4b0b | 5878 | t->info = sinfo_copy (s); |
616915dd | 5879 | t->defstate = s->defstate; |
616915dd | 5880 | t->nullstate = s->nullstate; |
5881 | ||
5882 | /* start modifications */ | |
5883 | t->bufinfo.bufstate = s->bufinfo.bufstate; | |
5884 | t->bufinfo.len = s->bufinfo.len; | |
5885 | t->bufinfo.size = s->bufinfo.size; | |
5886 | /* end modifications */ | |
5887 | ||
5888 | t->aliaskind = s->aliaskind; | |
5889 | t->oaliaskind = s->oaliaskind; | |
5890 | ||
5891 | t->expkind = s->expkind; | |
5892 | t->oexpkind = s->oexpkind; | |
5893 | ||
28bf4b0b | 5894 | t->nullinfo = stateInfo_copy (s->nullinfo); |
5895 | t->aliasinfo = stateInfo_copy (s->aliasinfo); | |
5896 | t->definfo = stateInfo_copy (s->definfo); | |
5897 | t->expinfo = stateInfo_copy (s->expinfo); | |
616915dd | 5898 | |
5899 | t->deriv = sRefSet_newDeepCopy (s->deriv); | |
28bf4b0b | 5900 | t->state = valueTable_copy (s->state); |
16c024b5 | 5901 | |
393e573f | 5902 | DPRINTF (("Made copy: %s => %s", sRef_unparseFull (s), sRef_unparseFull (t))); |
616915dd | 5903 | return t; |
5904 | } | |
5905 | else | |
5906 | { | |
5907 | return sRef_undefined; | |
5908 | } | |
5909 | } | |
5910 | ||
5911 | /*@notfunction@*/ | |
5912 | # define PREDTEST(func,s) \ | |
5913 | do { if (sRef_isInvalid (s)) { return FALSE; } \ | |
5914 | else { if (sRef_isConj (s)) \ | |
5915 | { return (func (sRef_getConjA (s)) \ | |
5916 | || func (sRef_getConjB (s))); }}} while (FALSE); | |
5917 | ||
5918 | bool sRef_isAddress (sRef s) | |
5919 | { | |
5920 | PREDTEST (sRef_isAddress, s); | |
5921 | return (s->kind == SK_ADR); | |
5922 | } | |
5923 | ||
5924 | /* | |
5925 | ** pretty weak... maybe a flag should control this. | |
5926 | */ | |
5927 | ||
5928 | bool sRef_isThroughArrayFetch (sRef s) | |
5929 | { | |
6483a926 | 5930 | if (sRef_isReasonable (s)) |
616915dd | 5931 | { |
5932 | sRef tref = s; | |
5933 | ||
5934 | do | |
5935 | { | |
5936 | sRef lt; | |
5937 | ||
5938 | if (sRef_isArrayFetch (tref)) | |
5939 | { | |
28bf4b0b | 5940 | return TRUE; |
616915dd | 5941 | } |
5942 | ||
5943 | lt = sRef_getBase (tref); | |
5944 | tref = lt; | |
6483a926 | 5945 | } while (sRef_isReasonable (tref)); |
616915dd | 5946 | } |
5947 | ||
5948 | return FALSE; | |
5949 | } | |
5950 | ||
5951 | bool sRef_isArrayFetch (sRef s) | |
5952 | { | |
5953 | PREDTEST (sRef_isArrayFetch, s); | |
5954 | return (s->kind == SK_ARRAYFETCH); | |
5955 | } | |
5956 | ||
5957 | bool sRef_isMacroParamRef (sRef s) | |
5958 | { | |
5959 | if (context_inMacro () && sRef_isCvar (s)) | |
5960 | { | |
5961 | uentry ue = sRef_getUentry (s); | |
5962 | cstring pname = makeParam (uentry_rawName (ue)); | |
5963 | uentry mac = usymtab_lookupSafe (pname); | |
5964 | ||
5965 | cstring_free (pname); | |
5966 | return (uentry_isValid (mac)); | |
5967 | } | |
5968 | ||
5969 | return FALSE; | |
5970 | } | |
5971 | ||
5972 | bool sRef_isCvar (sRef s) | |
5973 | { | |
5974 | PREDTEST (sRef_isCvar, s); | |
5975 | return (s->kind == SK_CVAR); | |
5976 | } | |
5977 | ||
5978 | bool sRef_isConst (sRef s) | |
5979 | { | |
5980 | PREDTEST (sRef_isConst, s); | |
5981 | return (s->kind == SK_CONST); | |
5982 | } | |
5983 | ||
5984 | bool sRef_isObject (sRef s) | |
5985 | { | |
5986 | PREDTEST (sRef_isObject, s); | |
5987 | return (s->kind == SK_OBJECT); | |
5988 | } | |
5989 | ||
5990 | bool sRef_isExternal (sRef s) | |
5991 | { | |
5992 | PREDTEST (sRef_isExternal, s); | |
5993 | return (s->kind == SK_EXTERNAL); | |
5994 | } | |
5995 | ||
5996 | static bool sRef_isDerived (sRef s) | |
5997 | { | |
5998 | PREDTEST (sRef_isDerived, s); | |
5999 | return (s->kind == SK_DERIVED); | |
6000 | } | |
6001 | ||
6002 | bool sRef_isField (sRef s) | |
6003 | { | |
6004 | PREDTEST (sRef_isField, s); | |
6005 | return (s->kind == SK_FIELD); | |
6006 | } | |
6007 | ||
6008 | static bool sRef_isIndex (sRef s) | |
6009 | { | |
6010 | PREDTEST (sRef_isIndex, s); | |
6011 | return (s->kind == SK_ARRAYFETCH); | |
6012 | } | |
6013 | ||
6014 | bool sRef_isAnyParam (sRef s) | |
6015 | { | |
6016 | PREDTEST (sRef_isAnyParam, s); | |
6017 | return (s->kind == SK_PARAM); | |
6018 | } | |
6019 | ||
6020 | bool sRef_isParam (sRef s) | |
6021 | { | |
6022 | PREDTEST (sRef_isParam, s); | |
6023 | return (s->kind == SK_PARAM); | |
6024 | } | |
6025 | ||
6026 | bool sRef_isDirectParam (sRef s) | |
6027 | { | |
6028 | PREDTEST (sRef_isDirectParam, s); | |
6029 | ||
6030 | return ((s->kind == SK_CVAR) && | |
6031 | (s->info->cvar->lexlevel == functionScope) && | |
6032 | (context_inFunction () && | |
b73d1009 | 6033 | (s->info->cvar->index <= usymId_fromInt (uentryList_size (context_getParams ()))))); |
616915dd | 6034 | } |
6035 | ||
6036 | bool sRef_isPointer (sRef s) | |
6037 | { | |
6038 | PREDTEST (sRef_isPointer, s); | |
6039 | return (s->kind == SK_PTR); | |
6040 | } | |
6041 | ||
6042 | /* | |
6043 | ** returns true if storage referenced by s is visible | |
6044 | */ | |
6045 | ||
6046 | bool sRef_isReference (sRef s) | |
6047 | { | |
6048 | PREDTEST (sRef_isReference, s); | |
6049 | ||
28bf4b0b | 6050 | return (sRef_isPointer (s) || sRef_isIndex (s) || sRef_isFileOrGlobalScope (s) |
616915dd | 6051 | || (sRef_isField (s) && (sRef_isReference (s->info->field->rec)))); |
6052 | } | |
6053 | ||
6054 | bool sRef_isIReference (sRef s) | |
6055 | { | |
6056 | return (sRef_isPointer (s) || sRef_isAddress (s) || sRef_isIndex (s) | |
6057 | || sRef_isField (s) || sRef_isArrayFetch (s)); | |
6058 | } | |
6059 | ||
28bf4b0b | 6060 | bool sRef_isFileOrGlobalScope (sRef s) |
616915dd | 6061 | { |
6062 | return (sRef_isCvar (s) && (s->info->cvar->lexlevel <= fileScope)); | |
6063 | } | |
6064 | ||
6065 | bool sRef_isRealGlobal (sRef s) | |
6066 | { | |
6067 | return (sRef_isCvar (s) && (s->info->cvar->lexlevel == globScope)); | |
6068 | } | |
6069 | ||
6070 | bool sRef_isFileStatic (sRef s) | |
6071 | { | |
6072 | return (sRef_isCvar (s) && (s->info->cvar->lexlevel == fileScope)); | |
6073 | } | |
6074 | ||
6075 | bool sRef_isAliasCheckedGlobal (sRef s) | |
6076 | { | |
28bf4b0b | 6077 | if (sRef_isFileOrGlobalScope (s)) |
616915dd | 6078 | { |
6079 | uentry ue = sRef_getUentry (s); | |
6080 | ||
6081 | return context_checkAliasGlob (ue); | |
6082 | } | |
6083 | else | |
6084 | { | |
6085 | return FALSE; | |
6086 | } | |
6087 | } | |
6088 | ||
6089 | void sRef_free (/*@only@*/ sRef s) | |
6090 | { | |
6091 | if (s != sRef_undefined && s->kind != SK_SPECIAL) | |
6092 | { | |
28bf4b0b | 6093 | DPRINTF (("Free sref: [%p]", s)); |
6094 | ||
6095 | sRef_checkValid (s); | |
6fcd0b1e | 6096 | |
6097 | multiVal_free (s->val); /* evans 2002-07-12 */ | |
28bf4b0b | 6098 | |
6099 | stateInfo_free (s->expinfo); | |
6100 | stateInfo_free (s->aliasinfo); | |
6101 | stateInfo_free (s->definfo); | |
6102 | stateInfo_free (s->nullinfo); | |
6103 | ||
616915dd | 6104 | sRefSet_free (s->deriv); |
6105 | s->deriv = sRefSet_undefined; | |
28bf4b0b | 6106 | |
6fcd0b1e | 6107 | valueTable_free (s->state); |
616915dd | 6108 | sinfo_free (s); |
6109 | ||
795e7f34 | 6110 | |
6111 | /* drl added to help locate use after release*/ | |
6112 | s->expinfo = stateInfo_undefined; | |
6113 | s->aliasinfo = stateInfo_undefined; | |
6114 | s->definfo = stateInfo_undefined; | |
6115 | s->nullinfo = stateInfo_undefined; | |
6116 | ||
b73d1009 | 6117 | sfree (s); |
616915dd | 6118 | } |
6119 | } | |
6120 | ||
6121 | void sRef_setType (sRef s, ctype t) | |
6122 | { | |
6483a926 | 6123 | if (sRef_isReasonable (s)) |
616915dd | 6124 | { |
02b84d4b | 6125 | sRef_checkMutable (s); |
616915dd | 6126 | s->type = t; |
6127 | } | |
6128 | } | |
6129 | ||
6130 | void sRef_setTypeFull (sRef s, ctype t) | |
6131 | { | |
6483a926 | 6132 | if (sRef_isReasonable (s)) |
616915dd | 6133 | { |
02b84d4b | 6134 | sRef_checkMutable (s); |
616915dd | 6135 | s->type = t; |
6136 | ||
6137 | sRefSet_allElements (s->deriv, current) | |
6138 | { | |
6139 | sRef_setTypeFull (current, ctype_unknown); | |
6140 | } end_sRefSet_allElements ; | |
6141 | } | |
6142 | } | |
6143 | ||
6144 | /*@exposed@*/ sRef | |
28bf4b0b | 6145 | sRef_buildField (/*@exposed@*/ sRef rec, /*@dependent@*/ cstring f) |
616915dd | 6146 | { |
6147 | return (sRef_buildNCField (rec, f)); | |
6148 | } | |
6149 | ||
6150 | static /*@exposed@*/ sRef | |
6151 | sRef_findDerivedField (/*@notnull@*/ sRef rec, cstring f) | |
6152 | { | |
6483a926 | 6153 | sRefSet_allElements (sRef_derivedFields (rec), sr) |
616915dd | 6154 | { |
6483a926 | 6155 | if (sRef_isReasonable (sr)) |
616915dd | 6156 | { |
6483a926 | 6157 | if (sRef_isReasonable (sr)) |
616915dd | 6158 | { |
6483a926 | 6159 | if (sr->info != NULL) |
28bf4b0b | 6160 | { |
6483a926 | 6161 | if (sr->kind == SK_FIELD && cstring_equal (sr->info->field->field, f)) |
6162 | { | |
6163 | return sr; | |
6164 | } | |
28bf4b0b | 6165 | } |
616915dd | 6166 | } |
6483a926 | 6167 | else |
6168 | { | |
6169 | llcontbug (message ("Invalid sRef as derived field of %s", sRef_unparse (rec))); | |
6170 | } | |
616915dd | 6171 | } |
6172 | } end_sRefSet_allElements; | |
6173 | ||
6174 | return sRef_undefined; | |
6175 | } | |
6176 | ||
28bf4b0b | 6177 | /*@dependent@*/ /*@observer@*/ sRefSet sRef_derivedFields (/*@temp@*/ sRef rec) |
616915dd | 6178 | { |
6483a926 | 6179 | if (sRef_isReasonable (rec)) |
616915dd | 6180 | { |
6181 | sRefSet ret; | |
6182 | ret = rec->deriv; | |
6183 | return (ret); | |
6184 | } | |
6185 | else | |
6186 | { | |
6187 | return (sRefSet_undefined); | |
6188 | } | |
6189 | } | |
6190 | ||
6191 | static /*@exposed@*/ sRef | |
6192 | sRef_findDerivedPointer (sRef s) | |
6193 | { | |
6483a926 | 6194 | if (sRef_isReasonable (s)) |
616915dd | 6195 | { |
6196 | sRefSet_realElements (s->deriv, sr) | |
6197 | { | |
6483a926 | 6198 | if (sRef_isReasonable (sr) && sr->kind == SK_PTR) |
616915dd | 6199 | { |
6200 | return sr; | |
6201 | } | |
6202 | } end_sRefSet_realElements; | |
6203 | } | |
6204 | ||
6205 | return sRef_undefined; | |
6206 | } | |
6207 | ||
6208 | bool | |
6209 | sRef_isUnknownArrayFetch (sRef s) | |
6210 | { | |
6483a926 | 6211 | return (sRef_isReasonable (s) |
616915dd | 6212 | && s->kind == SK_ARRAYFETCH |
6213 | && !s->info->arrayfetch->indknown); | |
6214 | } | |
6215 | ||
6216 | static /*@exposed@*/ sRef | |
6217 | sRef_findDerivedArrayFetch (/*@notnull@*/ sRef s, bool isknown, int idx, bool dead) | |
6218 | { | |
6219 | ||
6220 | if (isknown) | |
6221 | { | |
6222 | sRefSet_realElements (s->deriv, sr) | |
6223 | { | |
6483a926 | 6224 | if (sRef_isReasonable (sr) |
616915dd | 6225 | && sr->kind == SK_ARRAYFETCH |
6226 | && sr->info->arrayfetch->indknown | |
6227 | && (sr->info->arrayfetch->ind == idx)) | |
6228 | { | |
6229 | return sr; | |
6230 | } | |
6231 | } end_sRefSet_realElements; | |
6232 | } | |
6233 | else | |
6234 | { | |
6235 | sRefSet_realElements (s->deriv, sr) | |
6236 | { | |
6483a926 | 6237 | if (sRef_isReasonable (sr) |
616915dd | 6238 | && sr->kind == SK_ARRAYFETCH |
6239 | && (!sr->info->arrayfetch->indknown | |
6240 | || (sr->info->arrayfetch->indknown && | |
6241 | sr->info->arrayfetch->ind == 0))) | |
6242 | { | |
6243 | if (sRef_isDead (sr) || sRef_isKept (sr)) | |
6244 | { | |
6245 | if (dead || context_getFlag (FLG_STRICTUSERELEASED)) | |
6246 | { | |
6247 | return sr; | |
6248 | } | |
6249 | } | |
6250 | else | |
6251 | { | |
6252 | return sr; | |
6253 | } | |
6254 | } | |
6255 | } end_sRefSet_realElements; | |
6256 | } | |
6257 | ||
6258 | return sRef_undefined; | |
6259 | } | |
6260 | ||
6261 | static /*@exposed@*/ sRef | |
6262 | sRef_buildNCField (/*@exposed@*/ sRef rec, /*@exposed@*/ cstring f) | |
6263 | { | |
6264 | sRef s; | |
6265 | ||
28bf4b0b | 6266 | DPRINTF (("Build nc field: %s / %s", |
6267 | sRef_unparseFull (rec), f)); | |
6268 | ||
616915dd | 6269 | if (sRef_isInvalid (rec)) |
6270 | { | |
6271 | return sRef_undefined; | |
6272 | } | |
6273 | ||
6274 | /* | |
6275 | ** check if the field already has been referenced | |
6276 | */ | |
6277 | ||
6278 | s = sRef_findDerivedField (rec, f); | |
6279 | ||
6483a926 | 6280 | if (sRef_isReasonable (s)) |
616915dd | 6281 | { |
28bf4b0b | 6282 | return s; |
616915dd | 6283 | } |
6284 | else | |
6285 | { | |
6286 | ctype ct = ctype_realType (rec->type); | |
27c9e640 | 6287 | |
28bf4b0b | 6288 | DPRINTF (("Field of: %s", sRef_unparse (rec))); |
6289 | ||
6290 | s = sRef_newRef (); | |
616915dd | 6291 | s->kind = SK_FIELD; |
6292 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
6293 | s->info->field = (fldinfo) dmalloc (sizeof (*s->info->field)); | |
b73d1009 | 6294 | s->info->field->rec = rec; |
616915dd | 6295 | s->info->field->field = f; /* doesn't copy f */ |
6296 | ||
616915dd | 6297 | if (ctype_isKnown (ct) && ctype_isSU (ct)) |
6298 | { | |
6299 | uentry ue = uentryList_lookupField (ctype_getFields (ct), f); | |
6300 | ||
6301 | if (!uentry_isUndefined (ue)) | |
6302 | { | |
28bf4b0b | 6303 | DPRINTF (("lookup: %s for %s", uentry_unparseFull (ue), |
6304 | ctype_unparse (ct))); | |
6305 | ||
616915dd | 6306 | s->type = uentry_getType (ue); |
6307 | ||
6308 | if (ctype_isMutable (s->type) | |
6309 | && rec->aliaskind != AK_STACK | |
6310 | && !alkind_isStatic (rec->aliaskind)) | |
6311 | { | |
6312 | s->aliaskind = rec->aliaskind; | |
6313 | } | |
6314 | else | |
6315 | { | |
6316 | s->aliaskind = AK_UNKNOWN; | |
6317 | } | |
6318 | ||
6319 | if (sRef_isStateDefined (rec) || sRef_isStateUnknown (rec) | |
6320 | || sRef_isPdefined (rec)) | |
6321 | { | |
28bf4b0b | 6322 | sRef_setStateFromUentry (s, ue); |
6323 | } | |
616915dd | 6324 | else |
6325 | { | |
6326 | sRef_setPartsFromUentry (s, ue); | |
28bf4b0b | 6327 | } |
6328 | ||
616915dd | 6329 | s->oaliaskind = s->aliaskind; |
6330 | s->oexpkind = s->expkind; | |
16c024b5 | 6331 | |
28bf4b0b | 6332 | DPRINTF (("sref: %s", sRef_unparseFull (s))); |
616915dd | 6333 | } |
6334 | else | |
6335 | { | |
6336 | /* | |
6337 | Never report this as an error. It can happen whenever there | |
6338 | is casting involved. | |
6339 | ||
6340 | if (report) | |
6341 | { | |
6342 | llcontbug (message ("buildNCField --- no field %s: %q / %s", | |
6343 | f, sRef_unparse (s), ctype_unparse (ct))); | |
6344 | } | |
6345 | */ | |
6346 | ||
6347 | return sRef_undefined; | |
6348 | } | |
6349 | } | |
6350 | ||
6351 | if (rec->defstate == SS_DEFINED | |
6352 | && (s->defstate == SS_UNDEFINED || s->defstate == SS_UNKNOWN)) | |
6353 | { | |
6354 | s->defstate = SS_DEFINED; | |
6355 | } | |
6356 | else if (rec->defstate == SS_PARTIAL) | |
6357 | { | |
6358 | s->defstate = SS_PARTIAL; | |
6359 | } | |
6360 | else if (rec->defstate == SS_ALLOCATED) | |
6361 | { | |
6362 | if (ctype_isStackAllocated (ct) && ctype_isStackAllocated (s->type)) | |
6363 | { | |
6364 | s->defstate = SS_ALLOCATED; | |
6365 | } | |
6366 | else | |
6367 | { | |
6368 | s->defstate = SS_UNDEFINED; | |
6369 | } | |
6370 | } | |
6371 | else if (s->defstate == SS_UNKNOWN) | |
6372 | { | |
6373 | s->defstate = rec->defstate; | |
6374 | } | |
6375 | else | |
6376 | { | |
6377 | ; /* no change */ | |
6378 | } | |
6379 | ||
6380 | if (s->defstate == SS_UNDEFINED) | |
6381 | { | |
6382 | ctype rt = ctype_realType (s->type); | |
6383 | ||
6384 | if (ctype_isArray (rt) || ctype_isSU (rt)) | |
6385 | { | |
28bf4b0b | 6386 | s->defstate = SS_ALLOCATED; |
616915dd | 6387 | } |
6388 | } | |
6389 | ||
6390 | sRef_addDeriv (rec, s); | |
28bf4b0b | 6391 | DPRINTF (("Add deriv: %s", sRef_unparseFull (rec))); |
616915dd | 6392 | |
6393 | if (ctype_isInt (s->type) && cstring_equal (f, REFSNAME)) | |
6394 | { | |
6395 | s->aliaskind = AK_REFS; | |
6396 | s->oaliaskind = AK_REFS; | |
6397 | } | |
6398 | ||
28bf4b0b | 6399 | DPRINTF (("Build field ==> %s", sRef_unparseFull (s))); |
6400 | return s; | |
616915dd | 6401 | } |
6402 | } | |
6403 | ||
6404 | bool | |
6405 | sRef_isStackAllocated (sRef s) | |
6406 | { | |
6483a926 | 6407 | return (sRef_isReasonable(s) |
616915dd | 6408 | && s->defstate == SS_ALLOCATED && ctype_isStackAllocated (s->type)); |
6409 | } | |
6410 | ||
6411 | static | |
6412 | void sRef_setArrayFetchState (/*@notnull@*/ /*@exposed@*/ sRef s, | |
6413 | /*@notnull@*/ /*@exposed@*/ sRef arr) | |
6414 | { | |
28bf4b0b | 6415 | sRef_checkMutable (s); |
6416 | ||
616915dd | 6417 | if (ctype_isRealAP (arr->type)) |
6418 | { | |
6419 | s->type = ctype_baseArrayPtr (arr->type); | |
6420 | } | |
6421 | ||
6422 | /* a hack, methinks... makeArrayFetch (&a[0]) ==> a[] */ | |
1d239d69 | 6423 | /* evans - 2001-08-27: not sure where this was necessary - it |
6424 | ** causes an assertion in in aliasCheckPred to fail. | |
6425 | */ | |
6426 | ||
616915dd | 6427 | if (sRef_isAddress (arr)) |
6428 | { | |
6429 | sRef t = arr->info->ref; | |
6430 | ||
6431 | if (sRef_isArrayFetch (t)) | |
6432 | { | |
6433 | s->info->arrayfetch->arr = t->info->arrayfetch->arr; | |
6434 | } | |
6435 | } | |
6436 | else if (ctype_isRealPointer (arr->type)) | |
6437 | { | |
6438 | sRef sp = sRef_findDerivedPointer (arr); | |
616915dd | 6439 | |
6483a926 | 6440 | if (sRef_isReasonable (sp)) |
616915dd | 6441 | { |
6442 | ||
6443 | if (ctype_isMutable (s->type)) | |
6444 | { | |
16c024b5 | 6445 | s->expkind = sRef_getExKind (sp); |
6446 | s->expinfo = stateInfo_copy (sp->expinfo); | |
6447 | ||
616915dd | 6448 | s->aliaskind = sp->aliaskind; |
16c024b5 | 6449 | s->aliasinfo = stateInfo_copy (sp->aliasinfo); |
616915dd | 6450 | } |
6451 | ||
6452 | s->defstate = sp->defstate; | |
6453 | ||
6454 | if (s->defstate == SS_DEFINED) | |
6455 | { | |
6456 | if (!context_getFlag (FLG_STRICTDESTROY)) | |
6457 | { | |
6458 | s->defstate = SS_PARTIAL; | |
6459 | } | |
6460 | } | |
6461 | ||
393e573f | 6462 | DPRINTF (("Set null state: %s / %s", sRef_unparseFull (s), sRef_unparseFull (sp))); |
28bf4b0b | 6463 | sRef_setNullStateN (s, sRef_getNullState (sp)); |
616915dd | 6464 | } |
6465 | else | |
6466 | { | |
6467 | if (arr->defstate == SS_UNDEFINED) | |
6468 | { | |
6469 | s->defstate = SS_UNUSEABLE; | |
6470 | } | |
6471 | else if ((arr->defstate == SS_ALLOCATED) && !ctype_isSU (s->type)) | |
6472 | { | |
6473 | s->defstate = SS_UNDEFINED; | |
6474 | } | |
6475 | else | |
6476 | { | |
6477 | if (!context_getFlag (FLG_STRICTDESTROY)) | |
6478 | { | |
6479 | s->defstate = SS_PARTIAL; | |
6480 | } | |
6481 | else | |
6482 | { | |
6483 | s->defstate = SS_DEFINED; | |
6484 | } | |
6485 | ||
6486 | /* | |
6487 | ** Very weak checking for array elements. | |
6488 | ** Was: | |
6489 | ** s->defstate = arr->defstate; | |
6490 | */ | |
6491 | } | |
6492 | ||
16c024b5 | 6493 | s->expkind = sRef_getExKind (arr); |
6494 | s->expinfo = stateInfo_copy (arr->expinfo); | |
6495 | ||
616915dd | 6496 | if (arr->aliaskind == AK_LOCAL || arr->aliaskind == AK_FRESH) |
6497 | { | |
6498 | s->aliaskind = AK_LOCAL; | |
6499 | } | |
6500 | else | |
6501 | { | |
6502 | s->aliaskind = AK_UNKNOWN; | |
6503 | } | |
6504 | ||
6505 | sRef_setTypeState (s); | |
6506 | } | |
6507 | } | |
6508 | else | |
6509 | { | |
6510 | if (arr->defstate == SS_DEFINED) | |
6511 | { | |
6512 | /* | |
6513 | ** Very weak checking for array elements. | |
6514 | ** Was: | |
6515 | ** s->defstate = arr->defstate; | |
6516 | */ | |
6517 | ||
6518 | if (context_getFlag (FLG_STRICTDESTROY)) | |
6519 | { | |
6520 | s->defstate = SS_DEFINED; | |
6521 | } | |
6522 | else | |
6523 | { | |
6524 | s->defstate = SS_PARTIAL; | |
6525 | } | |
6526 | } | |
6527 | else if (arr->defstate == SS_ALLOCATED) | |
6528 | { | |
6529 | if (ctype_isRealArray (s->type)) | |
6530 | { | |
6531 | s->defstate = SS_ALLOCATED; | |
6532 | } | |
6533 | else | |
6534 | { | |
6535 | if (!s->info->arrayfetch->indknown) | |
6536 | { | |
6537 | /* | |
6538 | ** is index is unknown, elements is defined or | |
6539 | ** allocated is any element is! | |
6540 | */ | |
6541 | ||
6542 | s->defstate = SS_UNDEFINED; | |
6543 | ||
6544 | sRefSet_allElements (arr->deriv, sr) | |
6545 | { | |
6483a926 | 6546 | if (sRef_isReasonable (sr)) |
616915dd | 6547 | { |
6483a926 | 6548 | if (sRef_isReasonable (sr)) |
616915dd | 6549 | { |
6483a926 | 6550 | if (sr->defstate == SS_ALLOCATED) |
616915dd | 6551 | { |
6483a926 | 6552 | s->defstate = SS_ALLOCATED; |
6553 | } | |
6554 | else | |
6555 | { | |
6556 | if (sr->defstate == SS_DEFINED) | |
616915dd | 6557 | { |
6483a926 | 6558 | if (context_getFlag (FLG_STRICTDESTROY)) |
6559 | { | |
6560 | s->defstate = SS_DEFINED; | |
6561 | } | |
6562 | else | |
6563 | { | |
6564 | s->defstate = SS_PARTIAL; | |
6565 | } | |
6566 | ||
6567 | break; | |
616915dd | 6568 | } |
616915dd | 6569 | } |
6570 | } | |
6483a926 | 6571 | else |
6572 | { | |
6573 | llcontbug (message ("Invalid sRef as derived element of %s", sRef_unparse (arr))); | |
6574 | } | |
616915dd | 6575 | } |
6576 | } end_sRefSet_allElements; | |
6483a926 | 6577 | } |
616915dd | 6578 | else |
6579 | { | |
6580 | s->defstate = SS_UNDEFINED; | |
6581 | } | |
6582 | } | |
6583 | } | |
6584 | else | |
6585 | { | |
6586 | s->defstate = arr->defstate; | |
6587 | } | |
6588 | ||
6589 | ||
6590 | /* | |
6591 | ** kludgey way to guess where aliaskind applies | |
6592 | */ | |
6593 | ||
6594 | if (ctype_isMutable (s->type) | |
6595 | && !ctype_isPointer (arr->type) | |
6596 | && !alkind_isStatic (arr->aliaskind) | |
6597 | && !alkind_isStack (arr->aliaskind)) /* evs - 2000-06-20: don't pass stack allocation to members */ | |
6598 | { | |
6599 | s->aliaskind = arr->aliaskind; | |
6600 | } | |
6601 | else | |
6602 | { | |
6603 | s->aliaskind = AK_UNKNOWN; | |
6604 | } | |
6605 | ||
6606 | sRef_setTypeState (s); | |
6607 | } | |
6608 | ||
6609 | if (sRef_isObserver (arr)) | |
6610 | { | |
6611 | s->expkind = XO_OBSERVER; | |
16c024b5 | 6612 | s->expinfo = stateInfo_copy (arr->expinfo); |
616915dd | 6613 | } |
6614 | } | |
6615 | ||
6616 | /*@exposed@*/ sRef sRef_buildArrayFetch (/*@exposed@*/ sRef arr) | |
6617 | { | |
6618 | sRef s; | |
6619 | ||
6483a926 | 6620 | if (!sRef_isReasonable (arr)) { |
616915dd | 6621 | /*@-nullret@*/ return arr /*@=nullret@*/; |
6622 | } | |
6623 | ||
6624 | if (ctype_isRealPointer (arr->type)) | |
6625 | { | |
6626 | (void) sRef_buildPointer (arr); /* do this to define arr! */ | |
6627 | } | |
6628 | ||
6629 | s = sRef_findDerivedArrayFetch (arr, FALSE, 0, FALSE); | |
6630 | ||
6483a926 | 6631 | if (sRef_isReasonable (s)) |
616915dd | 6632 | { |
3120b462 | 6633 | /* evans 2001-07-12: this is bogus, clean-up hack */ |
6634 | if (s->info->arrayfetch->arr != arr) | |
6635 | { | |
6636 | sRef res; | |
6637 | check (sRefSet_delete (arr->deriv, s)); | |
6638 | res = sRef_buildArrayFetch (arr); | |
6639 | sRef_copyState (res, s); | |
1d239d69 | 6640 | llassert (res->info->arrayfetch->arr == arr); |
3120b462 | 6641 | return res; |
6642 | } | |
6643 | ||
16c024b5 | 6644 | s->expkind = sRef_getExKind (arr); |
6645 | s->expinfo = stateInfo_copy (arr->expinfo); | |
6646 | ||
616915dd | 6647 | return s; |
6648 | } | |
6649 | else | |
6650 | { | |
28bf4b0b | 6651 | s = sRef_newRef (); |
616915dd | 6652 | |
6653 | s->kind = SK_ARRAYFETCH; | |
6654 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
6655 | s->info->arrayfetch = (ainfo) dmalloc (sizeof (*s->info->arrayfetch)); | |
6656 | s->info->arrayfetch->indknown = FALSE; | |
6657 | s->info->arrayfetch->ind = 0; | |
b73d1009 | 6658 | s->info->arrayfetch->arr = arr; |
393e573f | 6659 | |
616915dd | 6660 | sRef_setArrayFetchState (s, arr); |
393e573f | 6661 | |
616915dd | 6662 | s->oaliaskind = s->aliaskind; |
6663 | s->oexpkind = s->expkind; | |
6664 | ||
6665 | if (!context_inProtectVars ()) | |
6666 | { | |
6667 | sRef_addDeriv (arr, s); | |
6668 | } | |
6669 | ||
ccf0a4a8 | 6670 | if (valueTable_isUndefined (s->state)) |
6671 | { | |
16c024b5 | 6672 | s->state = context_createValueTable |
6673 | (s, stateInfo_makeLoc (g_currentloc, SA_CREATED)); | |
ccf0a4a8 | 6674 | } |
393e573f | 6675 | |
616915dd | 6676 | return (s); |
6677 | } | |
6678 | } | |
6679 | ||
6680 | /*@exposed@*/ sRef | |
6681 | sRef_buildArrayFetchKnown (/*@exposed@*/ sRef arr, int i) | |
6682 | { | |
6683 | sRef s; | |
6684 | ||
6483a926 | 6685 | if (!sRef_isReasonable (arr)) { |
616915dd | 6686 | /*@-nullret@*/ return arr /*@=nullret@*/; |
6687 | } | |
6688 | ||
6689 | if (ctype_isRealPointer (arr->type)) | |
6690 | { | |
1d239d69 | 6691 | (void) sRef_buildPointer (arr); /* do this to define arr! */ |
616915dd | 6692 | } |
6693 | ||
6694 | s = sRef_findDerivedArrayFetch (arr, TRUE, i, FALSE); | |
1d239d69 | 6695 | |
6483a926 | 6696 | if (sRef_isReasonable (s)) |
616915dd | 6697 | { |
3120b462 | 6698 | /* evans 2001-07-12: this is bogus, clean-up hack */ |
6699 | if (s->info->arrayfetch->arr != arr) | |
6700 | { | |
6701 | sRef res; | |
1d239d69 | 6702 | |
3120b462 | 6703 | check (sRefSet_delete (arr->deriv, s)); |
6704 | res = sRef_buildArrayFetchKnown (arr, i); | |
1d239d69 | 6705 | |
6706 | llassert (res->info->arrayfetch->arr == arr); | |
3120b462 | 6707 | sRef_copyState (res, s); |
1d239d69 | 6708 | llassert (res->info->arrayfetch->arr == arr); |
3120b462 | 6709 | return res; |
6710 | } | |
6711 | ||
16c024b5 | 6712 | s->expkind = sRef_getExKind (arr); |
6713 | s->expinfo = stateInfo_copy (arr->expinfo); | |
6714 | ||
3120b462 | 6715 | llassert (s->info->arrayfetch->arr == arr); |
616915dd | 6716 | return s; |
6717 | } | |
6718 | else | |
6719 | { | |
28bf4b0b | 6720 | s = sRef_newRef (); |
616915dd | 6721 | |
6722 | s->kind = SK_ARRAYFETCH; | |
6723 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
6724 | s->info->arrayfetch = (ainfo) dmalloc (sizeof (*s->info->arrayfetch)); | |
b73d1009 | 6725 | s->info->arrayfetch->arr = arr; |
616915dd | 6726 | s->info->arrayfetch->indknown = TRUE; |
6727 | s->info->arrayfetch->ind = i; | |
1d239d69 | 6728 | |
616915dd | 6729 | sRef_setArrayFetchState (s, arr); |
1d239d69 | 6730 | /* evans 2001-08-27 no: can change this - llassert (s->info->arrayfetch->arr == arr); */ |
6731 | ||
616915dd | 6732 | s->oaliaskind = s->aliaskind; |
6733 | s->oexpkind = s->expkind; | |
6734 | sRef_addDeriv (arr, s); | |
6735 | ||
28bf4b0b | 6736 | llassert (valueTable_isUndefined (s->state)); |
16c024b5 | 6737 | s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc, SA_CREATED)); |
616915dd | 6738 | return (s); |
6739 | } | |
6740 | } | |
6741 | ||
6742 | /* | |
6743 | ** sets everything except for defstate | |
6744 | */ | |
6745 | ||
6746 | static void | |
6747 | sRef_setPartsFromUentry (sRef s, uentry ue) | |
28bf4b0b | 6748 | { |
6749 | sRef uref = uentry_getSref (ue); | |
6750 | ||
6483a926 | 6751 | llassert (sRef_isReasonable (s)); |
616915dd | 6752 | |
6753 | s->aliaskind = alkind_derive (s->aliaskind, uentry_getAliasKind (ue)); | |
6754 | s->oaliaskind = s->aliaskind; | |
6755 | ||
6756 | if (s->expkind == XO_UNKNOWN) | |
6757 | { | |
6758 | s->expkind = uentry_getExpKind (ue); | |
6759 | } | |
28bf4b0b | 6760 | |
616915dd | 6761 | s->oexpkind = s->expkind; |
28bf4b0b | 6762 | |
6763 | if (sRef_getNullState (s) == NS_UNKNOWN) | |
6764 | { | |
393e573f | 6765 | DPRINTF (("Set null state: %s / %s", sRef_unparseFull (s), uentry_unparseFull (ue))); |
28bf4b0b | 6766 | sRef_setNullStateN (s, sRef_getNullState (uentry_getSref (ue))); |
6767 | } | |
6768 | else | |
616915dd | 6769 | { |
28bf4b0b | 6770 | DPRINTF (("Skipping null null state!")); |
616915dd | 6771 | } |
6772 | ||
28bf4b0b | 6773 | if (s->aliaskind == AK_IMPONLY && (sRef_isExposed (s) || sRef_isObserver (s))) |
616915dd | 6774 | { |
6775 | s->oaliaskind = s->aliaskind = AK_IMPDEPENDENT; | |
28bf4b0b | 6776 | } |
616915dd | 6777 | |
6483a926 | 6778 | if (sRef_isReasonable (uref)) |
28bf4b0b | 6779 | { |
6780 | valueTable utable = uref->state; | |
6781 | valueTable_free (s->state); | |
6782 | s->state = valueTable_copy (utable); | |
6783 | } | |
616915dd | 6784 | } |
6785 | ||
6786 | static void | |
6787 | sRef_setStateFromAbstractUentry (sRef s, uentry ue) | |
6788 | { | |
6483a926 | 6789 | llassert (sRef_isReasonable (s)); |
28bf4b0b | 6790 | sRef_checkMutable (s); |
6791 | ||
616915dd | 6792 | sRef_setPartsFromUentry (s, ue); |
6793 | ||
6794 | s->aliaskind = alkind_derive (s->aliaskind, uentry_getAliasKind (ue)); | |
6795 | s->oaliaskind = s->aliaskind; | |
6796 | ||
6797 | if (s->expkind == XO_UNKNOWN) | |
6798 | { | |
6799 | s->expkind = uentry_getExpKind (ue); | |
6800 | } | |
6801 | ||
6802 | s->oexpkind = s->expkind; | |
6803 | } | |
6804 | ||
6805 | void | |
6806 | sRef_setStateFromUentry (sRef s, uentry ue) | |
6807 | { | |
6808 | sstate defstate; | |
6809 | ||
28bf4b0b | 6810 | sRef_checkMutable (s); |
6483a926 | 6811 | llassert (sRef_isReasonable (s)); |
616915dd | 6812 | |
6813 | sRef_setPartsFromUentry (s, ue); | |
6814 | ||
6815 | defstate = uentry_getDefState (ue); | |
6816 | ||
6817 | if (sstate_isKnown (defstate)) | |
6818 | { | |
6819 | s->defstate = defstate; | |
6820 | } | |
6821 | else | |
6822 | { | |
6823 | ; | |
6824 | } | |
6825 | } | |
6826 | ||
6827 | /*@exposed@*/ sRef | |
6828 | sRef_buildPointer (/*@exposed@*/ sRef t) | |
6829 | { | |
6830 | DPRINTF (("build pointer: %s", sRef_unparse (t))); | |
6831 | ||
6832 | if (sRef_isInvalid (t)) return sRef_undefined; | |
6833 | ||
6834 | if (sRef_isAddress (t)) | |
6835 | { | |
6836 | DPRINTF (("Return ref: %s", sRef_unparse (t->info->ref))); | |
6837 | return (t->info->ref); | |
6838 | } | |
6839 | else | |
6840 | { | |
6841 | sRef s = sRef_findDerivedPointer (t); | |
6842 | ||
6843 | DPRINTF (("find derived: %s", sRef_unparse (s))); | |
6844 | ||
6483a926 | 6845 | if (sRef_isReasonable (s)) |
616915dd | 6846 | { |
16c024b5 | 6847 | s->expkind = sRef_getExKind (t); |
6848 | s->expinfo = stateInfo_copy (t->expinfo); | |
6849 | ||
616915dd | 6850 | s->oaliaskind = s->aliaskind; |
6851 | s->oexpkind = s->expkind; | |
6852 | ||
6853 | return s; | |
6854 | } | |
6855 | else | |
6856 | { | |
6857 | s = sRef_constructPointerAux (t); | |
6858 | ||
6859 | DPRINTF (("construct: %s", sRef_unparse (s))); | |
6860 | ||
6483a926 | 6861 | if (sRef_isReasonable (s)) |
616915dd | 6862 | { |
6863 | sRef_addDeriv (t, s); | |
6864 | ||
6865 | s->oaliaskind = s->aliaskind; | |
6866 | s->oexpkind = s->expkind; | |
6867 | } | |
6868 | ||
6869 | return s; | |
6870 | } | |
6871 | } | |
6872 | } | |
6873 | ||
6874 | /*@exposed@*/ sRef | |
28bf4b0b | 6875 | sRef_constructPointer (/*@exposed@*/ sRef t) |
616915dd | 6876 | /*@modifies t@*/ |
6877 | { | |
6878 | return sRef_buildPointer (t); | |
6879 | } | |
6880 | ||
6881 | static /*@exposed@*/ sRef sRef_constructDerefAux (sRef t, bool isdead) | |
6882 | { | |
6483a926 | 6883 | if (sRef_isReasonable (t)) |
616915dd | 6884 | { |
6885 | sRef s; | |
6886 | ||
6887 | /* | |
6888 | ** if there is a derived t[?], return that. Otherwise, *t. | |
6889 | */ | |
6890 | ||
616915dd | 6891 | s = sRef_findDerivedArrayFetch (t, FALSE, 0, isdead); |
6892 | ||
6483a926 | 6893 | if (sRef_isReasonable (s)) |
616915dd | 6894 | { |
3120b462 | 6895 | DPRINTF (("Found array fetch: %s", sRef_unparseFull (s))); |
28bf4b0b | 6896 | return s; |
616915dd | 6897 | } |
6898 | else | |
6899 | { | |
6900 | sRef ret = sRef_constructPointer (t); | |
6901 | ||
3120b462 | 6902 | DPRINTF (("Constructed pointer: %s", sRef_unparseFull (ret))); |
616915dd | 6903 | |
3120b462 | 6904 | return ret; |
616915dd | 6905 | } |
6906 | } | |
6907 | else | |
6908 | { | |
6909 | return sRef_undefined; | |
6910 | } | |
6911 | } | |
6912 | ||
6913 | sRef sRef_constructDeref (sRef t) | |
6914 | { | |
6915 | return sRef_constructDerefAux (t, FALSE); | |
6916 | } | |
6917 | ||
6918 | sRef sRef_constructDeadDeref (sRef t) | |
6919 | { | |
6920 | return sRef_constructDerefAux (t, TRUE); | |
6921 | } | |
6922 | ||
6923 | static sRef | |
6924 | sRef_constructPointerAux (/*@notnull@*/ /*@exposed@*/ sRef t) | |
6925 | { | |
28bf4b0b | 6926 | sRef s = sRef_newRef (); |
616915dd | 6927 | ctype rt = t->type; |
6928 | ctype st; | |
6929 | ||
ccf0a4a8 | 6930 | llassert (valueTable_isUndefined (s->state)); |
6931 | ||
616915dd | 6932 | s->kind = SK_PTR; |
6933 | s->info = (sinfo) dmalloc (sizeof (*s->info)); | |
b73d1009 | 6934 | s->info->ref = t; |
616915dd | 6935 | |
6936 | if (ctype_isRealAP (rt)) | |
6937 | { | |
6938 | s->type = ctype_baseArrayPtr (rt); | |
6939 | } | |
6940 | ||
28bf4b0b | 6941 | st = ctype_realType (s->type); |
ccf0a4a8 | 6942 | |
616915dd | 6943 | if (t->defstate == SS_UNDEFINED) |
6944 | { | |
6945 | s->defstate = SS_UNUSEABLE; | |
16c024b5 | 6946 | s->definfo = stateInfo_copy (t->definfo); |
616915dd | 6947 | } |
6948 | else if ((t->defstate == SS_ALLOCATED) && !ctype_isSU (st)) | |
6949 | { | |
6950 | s->defstate = SS_UNDEFINED; | |
16c024b5 | 6951 | s->definfo = stateInfo_copy (t->definfo); |
616915dd | 6952 | } |
6953 | else | |
6954 | { | |
6955 | s->defstate = t->defstate; | |
16c024b5 | 6956 | s->definfo = stateInfo_copy (t->definfo); |
616915dd | 6957 | } |
6958 | ||
6959 | if (t->aliaskind == AK_LOCAL || t->aliaskind == AK_FRESH) | |
6960 | { | |
6961 | s->aliaskind = AK_LOCAL; | |
6962 | } | |
6963 | else | |
6964 | { | |
6965 | s->aliaskind = AK_UNKNOWN; | |
6966 | } | |
ccf0a4a8 | 6967 | |
16c024b5 | 6968 | s->expkind = sRef_getExKind (t); |
6969 | s->expinfo = stateInfo_copy (t->expinfo); | |
6970 | ||
616915dd | 6971 | sRef_setTypeState (s); |
ccf0a4a8 | 6972 | |
616915dd | 6973 | s->oaliaskind = s->aliaskind; |
6974 | s->oexpkind = s->expkind; | |
6975 | ||
ccf0a4a8 | 6976 | if (valueTable_isUndefined (s->state)) |
6977 | { | |
16c024b5 | 6978 | s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc, SA_CREATED)); |
ccf0a4a8 | 6979 | } |
6980 | ||
16c024b5 | 6981 | DPRINTF (("pointer: %s", sRef_unparseFull (s))); |
616915dd | 6982 | return s; |
6983 | } | |
6984 | ||
6985 | bool sRef_hasDerived (sRef s) | |
6986 | { | |
6483a926 | 6987 | return (sRef_isReasonable (s) && !sRefSet_isEmpty (s->deriv)); |
616915dd | 6988 | } |
6989 | ||
6990 | void | |
6991 | sRef_clearDerived (sRef s) | |
6992 | { | |
6483a926 | 6993 | if (sRef_isReasonable (s)) |
616915dd | 6994 | { |
6483a926 | 6995 | DPRINTF (("Clear derived: [%p] %s", s, sRef_unparseDebug (s))); |
28bf4b0b | 6996 | sRefSet_clear (s->deriv); |
616915dd | 6997 | } |
6998 | } | |
6999 | ||
7000 | void | |
7001 | sRef_clearDerivedComplete (sRef s) | |
7002 | { | |
6483a926 | 7003 | if (sRef_isReasonable (s)) |
616915dd | 7004 | { |
7005 | sRef base = sRef_getBaseSafe (s); | |
6483a926 | 7006 | |
7007 | while (sRef_isReasonable (base)) | |
616915dd | 7008 | { |
6483a926 | 7009 | DPRINTF (("Clear derived: [%p] %s", base, sRef_unparse (base))); |
616915dd | 7010 | sRefSet_clear (base->deriv); |
7011 | base = sRef_getBaseSafe (base); | |
7012 | } | |
7013 | ||
6483a926 | 7014 | DPRINTF (("Clear derived: [%p] %s", s, sRef_unparse (s))); |
616915dd | 7015 | sRefSet_clear (s->deriv); |
7016 | } | |
7017 | } | |
7018 | ||
28bf4b0b | 7019 | /*@exposed@*/ sRef sRef_makePointer (/*@exposed@*/ sRef s) |
7020 | /*@modifies s@*/ | |
616915dd | 7021 | { |
7022 | sRef res = sRef_buildPointer (s); | |
7023 | ||
16c024b5 | 7024 | DPRINTF (("Res: %s", sRef_unparseFull (res))); |
616915dd | 7025 | return res; |
7026 | } | |
7027 | ||
7028 | /* | |
7029 | ** &a[] => a (this is for out params) | |
7030 | */ | |
7031 | ||
7032 | /*@exposed@*/ sRef | |
7033 | sRef_makeAnyArrayFetch (/*@exposed@*/ sRef arr) | |
393e573f | 7034 | { |
616915dd | 7035 | if (sRef_isAddress (arr)) |
7036 | { | |
28bf4b0b | 7037 | return (arr->info->ref); |
616915dd | 7038 | } |
7039 | else | |
7040 | { | |
7041 | return (sRef_buildArrayFetch (arr)); | |
7042 | } | |
7043 | } | |
7044 | ||
7045 | /*@exposed@*/ sRef | |
28bf4b0b | 7046 | sRef_makeArrayFetch (/*@exposed@*/ sRef arr) |
616915dd | 7047 | { |
7048 | return (sRef_buildArrayFetch (arr)); | |
7049 | } | |
7050 | ||
7051 | /*@exposed@*/ sRef | |
28bf4b0b | 7052 | sRef_makeArrayFetchKnown (/*@exposed@*/ sRef arr, int i) |
616915dd | 7053 | { |
7054 | return (sRef_buildArrayFetchKnown (arr, i)); | |
7055 | } | |
7056 | ||
7057 | /*@exposed@*/ sRef | |
7058 | sRef_makeField (sRef rec, /*@dependent@*/ cstring f) | |
7059 | { | |
7060 | sRef ret; | |
7061 | ret = sRef_buildField (rec, f); | |
7062 | return ret; | |
7063 | } | |
7064 | ||
7065 | /*@exposed@*/ sRef | |
28bf4b0b | 7066 | sRef_makeNCField (/*@exposed@*/ sRef rec, /*@dependent@*/ cstring f) |
616915dd | 7067 | { |
28bf4b0b | 7068 | return (sRef_buildNCField (rec, f)); |
616915dd | 7069 | } |
7070 | ||
7071 | /*@only@*/ cstring | |
7072 | sRef_unparseKindName (sRef s) | |
7073 | { | |
7074 | cstring result; | |
7075 | ||
7076 | if (s == sRef_undefined) return cstring_makeLiteral ("<invalid>"); | |
7077 | ||
7078 | s = sRef_fixConj (s); | |
7079 | ||
7080 | switch (s->kind) | |
7081 | { | |
7082 | case SK_CVAR: | |
7083 | if (sRef_isLocalVar (s)) | |
7084 | { | |
7085 | result = cstring_makeLiteral ("Variable"); | |
7086 | } | |
7087 | else | |
7088 | { | |
7089 | result = cstring_makeLiteral ("Undef global"); | |
7090 | } | |
7091 | break; | |
7092 | case SK_PARAM: | |
7093 | result = cstring_makeLiteral ("Out parameter"); | |
7094 | break; | |
7095 | case SK_ARRAYFETCH: | |
7096 | if (sRef_isAnyParam (s->info->arrayfetch->arr)) | |
7097 | { | |
7098 | result = cstring_makeLiteral ("Out parameter"); | |
7099 | } | |
7100 | else if (sRef_isIndexKnown (s)) | |
7101 | { | |
7102 | result = cstring_makeLiteral ("Array element"); | |
7103 | } | |
7104 | else | |
7105 | { | |
7106 | result = cstring_makeLiteral ("Value"); | |
7107 | } | |
7108 | break; | |
7109 | case SK_PTR: | |
7110 | if (sRef_isAnyParam (s->info->ref)) | |
7111 | { | |
7112 | result = cstring_makeLiteral ("Out parameter"); | |
7113 | } | |
7114 | else | |
7115 | { | |
7116 | result = cstring_makeLiteral ("Value"); | |
7117 | } | |
7118 | break; | |
7119 | case SK_ADR: | |
7120 | result = cstring_makeLiteral ("Value"); | |
7121 | break; | |
7122 | case SK_FIELD: | |
7123 | result = cstring_makeLiteral ("Field"); | |
7124 | break; | |
7125 | case SK_OBJECT: | |
7126 | result = cstring_makeLiteral ("Object"); | |
7127 | break; | |
7128 | case SK_UNCONSTRAINED: | |
7129 | result = cstring_makeLiteral ("<anything>"); | |
7130 | break; | |
7131 | case SK_RESULT: | |
7132 | case SK_SPECIAL: | |
7133 | case SK_UNKNOWN: | |
7134 | case SK_EXTERNAL: | |
7135 | case SK_DERIVED: | |
7136 | case SK_CONST: | |
7137 | case SK_TYPE: | |
7138 | result = cstring_makeLiteral ("<unknown>"); | |
7139 | break; | |
7140 | case SK_CONJ: | |
7141 | result = cstring_makeLiteral ("<conj>"); | |
7142 | break; | |
7143 | case SK_NEW: | |
7144 | result = cstring_makeLiteral ("Storage"); | |
7145 | break; | |
7146 | } | |
7147 | ||
7148 | return result; | |
7149 | } | |
7150 | ||
7151 | /*@only@*/ cstring | |
7152 | sRef_unparseKindNamePlain (sRef s) | |
7153 | { | |
7154 | cstring result; | |
7155 | ||
7156 | if (s == sRef_undefined) return cstring_makeLiteral ("<invalid>"); | |
7157 | ||
7158 | s = sRef_fixConj (s); | |
7159 | ||
7160 | switch (s->kind) | |
7161 | { | |
7162 | case SK_CVAR: | |
7163 | if (sRef_isLocalVar (s)) | |
7164 | { | |
7165 | result = cstring_makeLiteral ("Variable"); | |
7166 | } | |
7167 | else | |
7168 | { | |
7169 | result = cstring_makeLiteral ("Global"); | |
7170 | } | |
7171 | break; | |
7172 | case SK_PARAM: | |
7173 | result = cstring_makeLiteral ("Parameter"); | |
7174 | break; | |
7175 | case SK_ARRAYFETCH: | |
7176 | if (sRef_isAnyParam (s->info->arrayfetch->arr)) | |
7177 | { | |
7178 | result = cstring_makeLiteral ("Parameter"); | |
7179 | } | |
7180 | else if (sRef_isIndexKnown (s)) | |
7181 | { | |
7182 | result = cstring_makeLiteral ("Array element"); | |
7183 | } | |
7184 | else | |
7185 | { | |
7186 | result = cstring_makeLiteral ("Value"); | |
7187 | } | |
7188 | break; | |
7189 | case SK_PTR: | |
7190 | if (sRef_isAnyParam (s->info->ref)) | |
7191 | { | |
7192 | result = cstring_makeLiteral ("Parameter"); | |
7193 | } | |
7194 | else | |
7195 | { | |
7196 | result = cstring_makeLiteral ("Value"); | |
7197 | } | |
7198 | break; | |
7199 | case SK_ADR: | |
7200 | result = cstring_makeLiteral ("Value"); | |
7201 | break; | |
7202 | case SK_FIELD: | |
7203 | result = cstring_makeLiteral ("Field"); | |
7204 | break; | |
7205 | case SK_OBJECT: | |
7206 | result = cstring_makeLiteral ("Object"); | |
7207 | break; | |
7208 | case SK_NEW: | |
7209 | result = cstring_makeLiteral ("Storage"); | |
7210 | break; | |
7211 | case SK_UNCONSTRAINED: | |
7212 | result = cstring_makeLiteral ("<anything>"); | |
7213 | break; | |
7214 | case SK_RESULT: | |
7215 | case SK_TYPE: | |
7216 | case SK_CONST: | |
7217 | case SK_EXTERNAL: | |
7218 | case SK_DERIVED: | |
7219 | case SK_UNKNOWN: | |
7220 | case SK_SPECIAL: | |
7221 | result = cstring_makeLiteral ("<unknown>"); | |
7222 | break; | |
7223 | case SK_CONJ: | |
7224 | result = cstring_makeLiteral ("<conj>"); | |
7225 | break; | |
7226 | } | |
7227 | ||
7228 | return result; | |
7229 | } | |
7230 | ||
7231 | /* | |
7232 | ** s1 <- s2 | |
7233 | */ | |
7234 | ||
7235 | void | |
7236 | sRef_copyState (sRef s1, sRef s2) | |
7237 | { | |
6483a926 | 7238 | if (sRef_isReasonable (s1) && sRef_isReasonable (s2)) |
616915dd | 7239 | { |
7240 | s1->defstate = s2->defstate; | |
7241 | ||
616915dd | 7242 | /* start modifications */ |
7243 | s1->bufinfo.bufstate = s2->bufinfo.bufstate; | |
7244 | s1->bufinfo.len = s2->bufinfo.len; | |
7245 | s1->bufinfo.size = s2->bufinfo.size; | |
7246 | /* end modifications */ | |
7247 | ||
7248 | s1->aliaskind = s2->aliaskind; | |
28bf4b0b | 7249 | s1->aliasinfo = stateInfo_update (s1->aliasinfo, s2->aliasinfo); |
616915dd | 7250 | |
7251 | s1->expkind = s2->expkind; | |
28bf4b0b | 7252 | s1->expinfo = stateInfo_update (s1->expinfo, s2->expinfo); |
393e573f | 7253 | |
28bf4b0b | 7254 | s1->nullstate = s2->nullstate; |
7255 | s1->nullinfo = stateInfo_update (s1->nullinfo, s2->nullinfo); | |
616915dd | 7256 | |
b73d1009 | 7257 | valueTable_free (s1->state); |
7258 | s1->state = valueTable_copy (s2->state); | |
616915dd | 7259 | s1->safe = s2->safe; |
28bf4b0b | 7260 | } |
616915dd | 7261 | } |
7262 | ||
7263 | sRef | |
7264 | sRef_makeNew (ctype ct, sRef t, cstring name) | |
7265 | { | |
28bf4b0b | 7266 | sRef s = sRef_newRef (); |
616915dd | 7267 | |
7268 | s->kind = SK_NEW; | |
7269 | s->type = ct; | |
7270 | ||
6483a926 | 7271 | llassert (sRef_isReasonable (t)); |
616915dd | 7272 | s->defstate = t->defstate; |
7273 | ||
7274 | s->aliaskind = t->aliaskind; | |
7275 | s->oaliaskind = s->aliaskind; | |
616915dd | 7276 | s->nullstate = t->nullstate; |
28bf4b0b | 7277 | |
616915dd | 7278 | s->expkind = t->expkind; |
7279 | s->oexpkind = s->expkind; | |
28bf4b0b | 7280 | |
616915dd | 7281 | s->info = (sinfo) dmalloc (sizeof (*s->info)); |
7282 | s->info->fname = name; | |
7283 | ||
7284 | /* start modifications */ | |
7285 | s->bufinfo.bufstate = t->bufinfo.bufstate; | |
7286 | /* end modifications */ | |
28bf4b0b | 7287 | |
7288 | llassert (valueTable_isUndefined (s->state)); | |
7289 | s->state = valueTable_copy (t->state); | |
616915dd | 7290 | |
28bf4b0b | 7291 | DPRINTF (("==> Copying state: %s", valueTable_unparse (s->state))); |
7292 | DPRINTF (("==> new: %s", sRef_unparseFull (s))); | |
7293 | return s; | |
616915dd | 7294 | } |
7295 | ||
7296 | sRef | |
7297 | sRef_makeType (ctype ct) | |
7298 | { | |
28bf4b0b | 7299 | sRef s = sRef_newRef (); |
7300 | ||
7301 | sRef_checkMutable (s); | |
7302 | ||
616915dd | 7303 | s->kind = SK_TYPE; |
7304 | s->type = ct; | |
7305 | ||
7306 | s->defstate = SS_UNKNOWN; | |
7307 | s->aliaskind = AK_UNKNOWN; | |
28bf4b0b | 7308 | sRef_setNullStateN (s, NS_UNKNOWN); |
7309 | ||
616915dd | 7310 | /* start modification */ |
7311 | s->bufinfo.bufstate = BB_NOTNULLTERMINATED; | |
7312 | /* end modification */ | |
7313 | ||
7314 | ||
7315 | if (ctype_isUA (ct)) | |
7316 | { | |
7317 | typeId uid = ctype_typeId (ct); | |
7318 | uentry ue = usymtab_getTypeEntrySafe (uid); | |
7319 | ||
7320 | if (uentry_isValid (ue)) | |
7321 | { | |
7322 | sRef_mergeStateQuiet (s, uentry_getSref (ue)); | |
7323 | } | |
7324 | } | |
28bf4b0b | 7325 | |
7326 | s->oaliaskind = s->aliaskind; | |
616915dd | 7327 | s->oexpkind = s->expkind; |
28bf4b0b | 7328 | llassert (valueTable_isUndefined (s->state)); |
16c024b5 | 7329 | s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc, SA_CREATED)); |
616915dd | 7330 | |
28bf4b0b | 7331 | DPRINTF (("Create: %s", sRef_unparseFull (s))); |
616915dd | 7332 | return s; |
7333 | } | |
7334 | ||
7335 | sRef | |
7336 | sRef_makeConst (ctype ct) | |
7337 | { | |
28bf4b0b | 7338 | sRef s = sRef_newRef (); |
616915dd | 7339 | |
7340 | s->kind = SK_CONST; | |
7341 | s->type = ct; | |
7342 | ||
7343 | s->defstate = SS_UNKNOWN; | |
7344 | s->aliaskind = AK_UNKNOWN; | |
28bf4b0b | 7345 | sRef_setNullStateN (s, NS_UNKNOWN); |
7346 | ||
616915dd | 7347 | /* start modification */ |
7348 | s->bufinfo.bufstate = BB_NULLTERMINATED; | |
7349 | /* end modification */ | |
2cecdaff | 7350 | |
7351 | /* evans 2002-04-22: added isManifestBool to avoid errors for -boolfalse initializations */ | |
7352 | if (!ctype_isManifestBool (ct) && ctype_isUA (ct)) | |
616915dd | 7353 | { |
7354 | typeId uid = ctype_typeId (ct); | |
7355 | uentry te = usymtab_getTypeEntrySafe (uid); | |
7356 | ||
7357 | if (uentry_isValid (te)) | |
7358 | { | |
7359 | sRef_mergeStateQuiet (s, uentry_getSref (te)); | |
7360 | } | |
7361 | } | |
28bf4b0b | 7362 | |
616915dd | 7363 | s->oaliaskind = s->aliaskind; |
7364 | s->oexpkind = s->expkind; | |
7365 | ||
28bf4b0b | 7366 | llassert (valueTable_isUndefined (s->state)); |
16c024b5 | 7367 | s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc, SA_CREATED)); |
28bf4b0b | 7368 | |
616915dd | 7369 | return s; |
7370 | } | |
7371 | ||
7372 | bool sRef_hasName (sRef s) | |
7373 | { | |
7374 | if (sRef_isInvalid (s)) | |
7375 | { | |
7376 | return (FALSE); | |
7377 | } | |
7378 | ||
7379 | switch (s->kind) | |
7380 | { | |
7381 | case SK_CVAR: | |
7382 | { | |
7383 | uentry u = usymtab_getRefQuiet (s->info->cvar->lexlevel, | |
7384 | s->info->cvar->index); | |
7385 | return (uentry_hasName (u)); | |
7386 | } | |
7387 | case SK_PARAM: | |
7388 | { | |
28bf4b0b | 7389 | if (s->info->paramno >= 0) |
7390 | { | |
7391 | uentry u = uentryList_getN (context_getParams (), | |
7392 | s->info->paramno); | |
7393 | ||
7394 | return (uentry_hasName (u)); | |
7395 | } | |
7396 | else | |
7397 | { | |
7398 | llassert (s->info->paramno == PARAMUNKNOWN); | |
7399 | return FALSE; | |
7400 | } | |
616915dd | 7401 | } |
7402 | default: | |
7403 | return TRUE; | |
7404 | } | |
7405 | } | |
7406 | ||
616915dd | 7407 | bool |
7408 | sRef_sameName (sRef s1, sRef s2) | |
7409 | { | |
7410 | if (sRef_isInvalid (s1)) | |
7411 | { | |
7412 | return sRef_isInvalid (s2); | |
7413 | } | |
7414 | ||
7415 | if (sRef_isInvalid (s2)) | |
7416 | { | |
7417 | return (FALSE); | |
7418 | } | |
7419 | ||
7420 | switch (s1->kind) | |
7421 | { | |
7422 | case SK_CVAR: | |
7423 | if (s2->kind == SK_CVAR) | |
7424 | { | |
7425 | return (s1->info->cvar->lexlevel == s2->info->cvar->lexlevel | |
7426 | && s1->info->cvar->index == s2->info->cvar->index); | |
7427 | } | |
7428 | else if (s2->kind == SK_PARAM) | |
7429 | { | |
7430 | if (context_inFunctionLike ()) | |
7431 | { | |
28bf4b0b | 7432 | if (s2->info->paramno != PARAMUNKNOWN) |
7433 | { | |
7434 | uentry u1 = usymtab_getRefQuiet (s1->info->cvar->lexlevel, | |
7435 | s1->info->cvar->index); | |
7436 | uentry u2 = uentryList_getN (context_getParams (), | |
7437 | s2->info->paramno); | |
7438 | ||
7439 | return (cstring_equalFree (uentry_getName (u1), | |
7440 | uentry_getName (u2))); | |
7441 | } | |
7442 | else | |
7443 | { | |
7444 | return s1->info->paramno == PARAMUNKNOWN; | |
7445 | } | |
616915dd | 7446 | } |
7447 | else | |
7448 | { | |
7449 | return FALSE; | |
7450 | } | |
7451 | } | |
7452 | else | |
7453 | { | |
7454 | return FALSE; | |
7455 | } | |
7456 | case SK_PARAM: | |
7457 | { | |
7458 | if (s2->kind == SK_PARAM) | |
7459 | { | |
7460 | return (s1->info->paramno == s2->info->paramno); | |
7461 | } | |
7462 | else if (s2->kind == SK_CVAR) | |
7463 | { | |
7464 | if (context_inFunctionLike ()) | |
7465 | { | |
28bf4b0b | 7466 | if (s1->info->paramno == PARAMUNKNOWN) |
7467 | { | |
7468 | return FALSE; | |
7469 | } | |
7470 | else | |
7471 | { | |
7472 | uentry u1 = uentryList_getN (context_getParams (), | |
7473 | s1->info->paramno); | |
7474 | uentry u2 = usymtab_getRefQuiet (s2->info->cvar->lexlevel, | |
7475 | s2->info->cvar->index); | |
7476 | ||
7477 | ||
7478 | return (cstring_equalFree (uentry_getName (u1), | |
7479 | uentry_getName (u2))); | |
7480 | } | |
616915dd | 7481 | } |
7482 | else | |
7483 | { | |
7484 | return FALSE; | |
7485 | } | |
7486 | } | |
7487 | else | |
7488 | { | |
7489 | return FALSE; | |
7490 | } | |
7491 | } | |
7492 | ||
7493 | case SK_UNCONSTRAINED: | |
7494 | return FALSE; | |
7495 | ||
7496 | case SK_ARRAYFETCH: | |
7497 | if (s2->kind == SK_ARRAYFETCH) | |
7498 | { | |
7499 | if (bool_equal (s1->info->arrayfetch->indknown, | |
7500 | s2->info->arrayfetch->indknown)) | |
7501 | { | |
7502 | if (!s1->info->arrayfetch->indknown | |
7503 | || (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind)) | |
7504 | { | |
7505 | return sRef_sameName (s1->info->arrayfetch->arr, | |
7506 | s2->info->arrayfetch->arr); | |
7507 | } | |
7508 | } | |
7509 | } | |
7510 | ||
7511 | return FALSE; | |
7512 | case SK_FIELD: | |
7513 | if (s2->kind == SK_FIELD) | |
7514 | { | |
7515 | if (cstring_equal (s1->info->field->field, | |
7516 | s2->info->field->field)) | |
7517 | { | |
7518 | return sRef_sameName (s1->info->field->rec, | |
7519 | s2->info->field->rec); | |
7520 | } | |
7521 | ||
7522 | } | |
7523 | return FALSE; | |
7524 | case SK_PTR: | |
7525 | case SK_ADR: | |
7526 | case SK_DERIVED: | |
7527 | case SK_EXTERNAL: | |
7528 | if (s2->kind == s1->kind) | |
7529 | { | |
7530 | return sRef_sameName (s1->info->ref, | |
7531 | s2->info->ref); | |
7532 | } | |
7533 | ||
7534 | return FALSE; | |
7535 | case SK_OBJECT: | |
7536 | return FALSE; | |
7537 | case SK_CONJ: | |
7538 | return sRef_sameName (sRef_getConjA (s1), s2); | |
7539 | case SK_NEW: | |
7540 | return FALSE; | |
7541 | case SK_UNKNOWN: | |
7542 | return (s2->kind == SK_UNKNOWN); | |
7543 | case SK_TYPE: | |
7544 | case SK_CONST: | |
7545 | if (s2->kind == s1->kind) | |
7546 | { | |
7547 | return (ctype_equal (s1->type, s2->type)); | |
7548 | } | |
7549 | ||
7550 | return FALSE; | |
7551 | case SK_SPECIAL: | |
7552 | if (s2->kind == SK_SPECIAL) | |
7553 | { | |
7554 | return (s1->info->spec == s2->info->spec); | |
7555 | } | |
7556 | return FALSE; | |
7557 | case SK_RESULT: | |
7558 | return (s2->kind == SK_RESULT); | |
7559 | default: | |
7560 | return FALSE; | |
7561 | } | |
7562 | BADEXIT; | |
7563 | } | |
7564 | ||
7565 | sRef | |
7566 | sRef_fixOuterRef (/*@returned@*/ sRef s) | |
7567 | { | |
7568 | sRef root = sRef_getRootBase (s); | |
7569 | ||
7570 | if (sRef_isCvar (root)) | |
7571 | { | |
7572 | uentry ue = usymtab_getRefQuiet (root->info->cvar->lexlevel, | |
7573 | root->info->cvar->index); | |
7574 | ||
7575 | if (uentry_isValid (ue)) | |
7576 | { | |
7577 | sRef uref = uentry_getSref (ue); | |
7578 | sRef sr = sRef_fixBase (s, uref); | |
7579 | ||
7580 | return (sr); | |
7581 | } | |
7582 | else | |
7583 | { | |
7584 | llcontbug (message ("sRef_fixOuterRef: undefined: %q", sRef_unparseDebug (s))); | |
7585 | return (s); | |
7586 | } | |
7587 | } | |
7588 | ||
7589 | return (s); | |
7590 | } | |
7591 | ||
7592 | void | |
7593 | sRef_storeState (sRef s) | |
7594 | { | |
7595 | if (sRef_isInvalid (s)) return; | |
7596 | ||
28bf4b0b | 7597 | sRef_checkMutable (s); |
616915dd | 7598 | s->oaliaskind = s->aliaskind; |
7599 | s->oexpkind = s->expkind; | |
7600 | } | |
7601 | ||
7602 | static void sRef_resetStateAux (sRef s, /*@unused@*/ fileloc loc) | |
7603 | { | |
7604 | sRef_resetState (s); | |
7605 | } | |
7606 | ||
7607 | void | |
7608 | sRef_resetState (sRef s) | |
7609 | { | |
7610 | bool changed = FALSE; | |
7611 | if (sRef_isInvalid (s)) return; | |
7612 | ||
7613 | ||
7614 | if (s->oaliaskind == AK_KILLREF && !sRef_isParam (s)) | |
7615 | { | |
7616 | /* | |
7617 | ** killref is used in a kludgey way, to save having to add | |
7618 | ** another alias kind (see usymtab_handleParams) | |
7619 | */ | |
7620 | ||
7621 | if (s->expkind != s->oexpkind) | |
7622 | { | |
7623 | changed = TRUE; | |
7624 | s->expkind = s->oexpkind; | |
7625 | } | |
7626 | } | |
7627 | else | |
7628 | { | |
7629 | if (s->expkind != s->oexpkind) | |
7630 | { | |
7631 | changed = TRUE; | |
7632 | s->expkind = s->oexpkind; | |
7633 | } | |
7634 | ||
7635 | if (s->aliaskind != s->oaliaskind | |
7636 | && s->aliaskind != AK_REFCOUNTED | |
7637 | && s->aliaskind != AK_REFS) | |
7638 | { | |
7639 | changed = TRUE; | |
7640 | s->aliaskind = s->oaliaskind; | |
28bf4b0b | 7641 | } |
616915dd | 7642 | } |
7643 | ||
7644 | if (changed) | |
7645 | { | |
7646 | sRef_clearDerived (s); | |
7647 | } | |
7648 | ||
7649 | } | |
7650 | ||
7651 | void | |
7652 | sRef_resetStateComplete (sRef s) | |
7653 | { | |
7654 | sRef_innerAliasSetComplete (sRef_resetStateAux, s, fileloc_undefined); | |
7655 | } | |
7656 | ||
7657 | /*@exposed@*/ sRef | |
7658 | sRef_fixBase (/*@returned@*/ sRef s, /*@returned@*/ sRef base) | |
7659 | { | |
7660 | sRef tmp = sRef_undefined; | |
7661 | sRef ret; | |
7662 | ||
7663 | if (sRef_isInvalid (s)) return s; | |
7664 | if (sRef_isInvalid (base)) return base; | |
7665 | ||
7666 | switch (s->kind) | |
7667 | { | |
7668 | case SK_RESULT: | |
7669 | case SK_PARAM: | |
7670 | case SK_CVAR: | |
7671 | ret = base; | |
7672 | break; | |
7673 | case SK_ARRAYFETCH: | |
7674 | tmp = sRef_fixBase (s->info->arrayfetch->arr, base); | |
7675 | ||
7676 | if (s->info->arrayfetch->indknown) | |
7677 | { | |
7678 | ret = sRef_makeArrayFetchKnown (tmp, s->info->arrayfetch->ind); | |
7679 | } | |
7680 | else | |
7681 | { | |
7682 | ret = sRef_makeArrayFetch (tmp); | |
7683 | } | |
7684 | break; | |
7685 | case SK_FIELD: | |
7686 | tmp = sRef_fixBase (s->info->field->rec, base); | |
7687 | ret = sRef_buildNCField (tmp, s->info->field->field); | |
7688 | break; | |
7689 | case SK_PTR: | |
7690 | tmp = sRef_fixBase (s->info->ref, base); | |
7691 | ret = sRef_makePointer (tmp); | |
7692 | break; | |
7693 | case SK_ADR: | |
7694 | tmp = sRef_fixBase (s->info->ref, base); | |
7695 | ret = sRef_makeAddress (tmp); | |
7696 | break; | |
7697 | case SK_CONJ: | |
7698 | { | |
7699 | sRef tmpb; | |
7700 | ||
7701 | tmp = sRef_fixBase (s->info->conj->a, base); | |
7702 | tmpb = sRef_fixBase (s->info->conj->b, base); | |
7703 | ||
7704 | ret = sRef_makeConj (tmp, tmpb); | |
7705 | break; | |
7706 | } | |
7707 | BADDEFAULT; | |
7708 | } | |
7709 | ||
7710 | return ret; | |
7711 | } | |
7712 | ||
7713 | static /*@exposed@*/ sRef | |
7714 | sRef_fixDirectBase (sRef s, sRef base) | |
7715 | { | |
7716 | sRef ret; | |
7717 | ||
7718 | ||
7719 | if (sRef_isInvalid (s)) | |
7720 | { | |
28bf4b0b | 7721 | return sRef_undefined; |
616915dd | 7722 | } |
28bf4b0b | 7723 | |
616915dd | 7724 | switch (s->kind) |
7725 | { | |
7726 | case SK_ARRAYFETCH: | |
7727 | if (s->info->arrayfetch->indknown) | |
7728 | { | |
7729 | ret = sRef_makeArrayFetchKnown (base, s->info->arrayfetch->ind); | |
7730 | } | |
7731 | else | |
7732 | { | |
7733 | ret = sRef_makeArrayFetch (base); | |
7734 | } | |
7735 | break; | |
7736 | case SK_FIELD: | |
7737 | ret = sRef_buildNCField (base, s->info->field->field); | |
7738 | break; | |
7739 | case SK_PTR: | |
7740 | ret = sRef_makePointer (base); | |
7741 | break; | |
7742 | case SK_ADR: | |
7743 | ret = sRef_makeAddress (base); | |
7744 | break; | |
7745 | case SK_CONJ: | |
7746 | { | |
7747 | sRef tmpa, tmpb; | |
7748 | ||
7749 | tmpa = sRef_fixDirectBase (s->info->conj->a, base); | |
7750 | tmpb = sRef_fixDirectBase (s->info->conj->b, base); | |
7751 | ||
7752 | ret = sRef_makeConj (tmpa, tmpb); | |
7753 | break; | |
7754 | } | |
7755 | BADDEFAULT; | |
7756 | } | |
7757 | ||
7758 | sRef_copyState (ret, s); | |
7759 | return ret; | |
7760 | } | |
7761 | ||
7762 | bool | |
7763 | sRef_isAllocIndexRef (sRef s) | |
7764 | { | |
7765 | return (sRef_isArrayFetch (s) && !(s->info->arrayfetch->indknown) | |
7766 | && sRef_isAllocated (s->info->arrayfetch->arr)); | |
7767 | } | |
7768 | ||
7769 | void | |
7770 | sRef_showRefLost (sRef s) | |
7771 | { | |
7772 | if (sRef_hasAliasInfoLoc (s)) | |
7773 | { | |
7774 | llgenindentmsg (cstring_makeLiteral ("Original reference lost"), | |
28bf4b0b | 7775 | sRef_getAliasInfoLoc (s)); |
616915dd | 7776 | } |
7777 | } | |
7778 | ||
7779 | void | |
7780 | sRef_showRefKilled (sRef s) | |
7781 | { | |
16c024b5 | 7782 | if (sRef_isValid (s)) |
616915dd | 7783 | { |
16c024b5 | 7784 | DPRINTF (("Killed: %s", sRef_unparseFull (s))); |
7785 | if (context_getLocIndentSpaces () == 0) { | |
7786 | stateInfo_display (s->definfo, message (" Storage %q", sRef_unparseOpt (s))); | |
7787 | } else { | |
7788 | stateInfo_display (s->definfo, message ("Storage %q", sRef_unparseOpt (s))); | |
7789 | } | |
616915dd | 7790 | } |
7791 | } | |
7792 | ||
7793 | void | |
7794 | sRef_showStateInconsistent (sRef s) | |
7795 | { | |
7796 | if (sRef_hasStateInfoLoc (s)) | |
7797 | { | |
7798 | llgenindentmsg | |
7799 | (message ("Storage %qbecomes inconsistent (released on one branch)", | |
7800 | sRef_unparseOpt (s)), | |
7801 | sRef_getStateInfoLoc (s)); | |
7802 | } | |
7803 | } | |
7804 | ||
7805 | void | |
7806 | sRef_showStateInfo (sRef s) | |
7807 | { | |
16c024b5 | 7808 | if (sRef_isValid (s)) { |
7809 | if (context_getLocIndentSpaces () == 0) { | |
7810 | stateInfo_display (s->definfo, message (" Storage %q", sRef_unparseOpt (s))); | |
7811 | } else { | |
7812 | stateInfo_display (s->definfo, message ("Storage %q", sRef_unparseOpt (s))); | |
616915dd | 7813 | } |
16c024b5 | 7814 | } |
616915dd | 7815 | } |
7816 | ||
7817 | void | |
7818 | sRef_showExpInfo (sRef s) | |
7819 | { | |
16c024b5 | 7820 | if (sRef_isValid (s)) { |
7821 | if (context_getLocIndentSpaces () == 0) { | |
7822 | stateInfo_display (s->expinfo, message (" Storage %q", sRef_unparseOpt (s))); | |
7823 | } else { | |
7824 | stateInfo_display (s->expinfo, message ("Storage %q", sRef_unparseOpt (s))); | |
616915dd | 7825 | } |
16c024b5 | 7826 | } |
616915dd | 7827 | } |
7828 | ||
28bf4b0b | 7829 | void |
7830 | sRef_showMetaStateInfo (sRef s, cstring key) | |
7831 | { | |
7832 | stateValue val; | |
7833 | metaStateInfo minfo = context_lookupMetaStateInfo (key); | |
7834 | ||
6483a926 | 7835 | llassert (sRef_isReasonable (s)); |
28bf4b0b | 7836 | llassert (valueTable_isDefined (s->state)); |
7837 | llassert (metaStateInfo_isDefined (minfo)); | |
7838 | ||
7839 | val = valueTable_lookup (s->state, key); | |
7840 | ||
7841 | if (stateValue_hasLoc (val)) | |
7842 | { | |
7843 | llgenindentmsg | |
0bf5022d | 7844 | (message ("%qbecomes %q", sRef_unparseOpt (s), |
2c88d156 | 7845 | stateValue_unparseValue (val, minfo)), |
28bf4b0b | 7846 | stateValue_getLoc (val)); |
7847 | } | |
7848 | } | |
7849 | ||
616915dd | 7850 | void |
7851 | sRef_showNullInfo (sRef s) | |
7852 | { | |
28bf4b0b | 7853 | DPRINTF (("Show null info: %s", sRef_unparseFull (s))); |
7854 | ||
616915dd | 7855 | if (sRef_hasNullInfoLoc (s) && sRef_isKnown (s)) |
7856 | { | |
28bf4b0b | 7857 | DPRINTF (("has null info: %s", |
7858 | fileloc_unparse (sRef_getNullInfoLoc (s)))); | |
7859 | ||
7860 | switch (sRef_getNullState (s)) | |
616915dd | 7861 | { |
7862 | case NS_CONSTNULL: | |
7863 | { | |
7864 | fileloc loc = sRef_getNullInfoLoc (s); | |
7865 | ||
7866 | if (fileloc_isDefined (loc) && !fileloc_isLib (loc)) | |
7867 | { | |
7868 | llgenindentmsg | |
7869 | (message ("Storage %qbecomes null", sRef_unparseOpt (s)), | |
7870 | loc); | |
7871 | } | |
7872 | break; | |
7873 | } | |
7874 | case NS_DEFNULL: | |
7875 | { | |
7876 | fileloc loc = sRef_getNullInfoLoc (s); | |
7877 | ||
7878 | if (fileloc_isDefined (loc) && !fileloc_isLib (loc)) | |
7879 | { | |
7880 | llgenindentmsg (message ("Storage %qbecomes null", sRef_unparseOpt (s)), | |
7881 | loc); | |
7882 | } | |
7883 | break; | |
7884 | } | |
7885 | case NS_ABSNULL: | |
7886 | case NS_POSNULL: | |
7887 | llgenindentmsg | |
7888 | (message ("Storage %qmay become null", sRef_unparseOpt (s)), | |
7889 | sRef_getNullInfoLoc (s)); | |
7890 | break; | |
7891 | case NS_NOTNULL: | |
7892 | case NS_MNOTNULL: | |
7893 | llgenindentmsg | |
7894 | (message ("Storage %qbecomes not null", sRef_unparseOpt (s)), | |
7895 | sRef_getNullInfoLoc (s)); | |
7896 | break; | |
7897 | case NS_UNKNOWN: | |
7898 | llgenindentmsg | |
7899 | (message ("Storage %qnull state becomes unknown", | |
7900 | sRef_unparseOpt (s)), | |
7901 | sRef_getNullInfoLoc (s)); | |
7902 | break; | |
7903 | ||
7904 | case NS_ERROR: | |
7905 | BADBRANCHCONT; | |
7906 | break; | |
7907 | ||
7908 | default: | |
7909 | llgenindentmsg | |
7910 | (message ("<error case> Storage %q becomes %s", | |
7911 | sRef_unparse (s), | |
28bf4b0b | 7912 | nstate_unparse (sRef_getNullState (s))), |
616915dd | 7913 | sRef_getNullInfoLoc (s)); |
7914 | ||
7915 | break; | |
7916 | } | |
7917 | } | |
7918 | } | |
7919 | ||
7920 | void | |
7921 | sRef_showAliasInfo (sRef s) | |
7922 | { | |
16c024b5 | 7923 | if (sRef_isValid (s)) |
616915dd | 7924 | { |
7925 | if (sRef_isFresh (s)) | |
7926 | { | |
16c024b5 | 7927 | if (context_getLocIndentSpaces () == 0) { |
7928 | stateInfo_display (s->aliasinfo, message (" Fresh storage %q", sRef_unparseOpt (s))); | |
7929 | } else { | |
7930 | stateInfo_display (s->aliasinfo, message ("Fresh storage %q", sRef_unparseOpt (s))); | |
7931 | } | |
616915dd | 7932 | } |
16c024b5 | 7933 | else |
616915dd | 7934 | { |
16c024b5 | 7935 | if (context_getLocIndentSpaces () == 0) { |
7936 | stateInfo_display (s->aliasinfo, message (" Storage %q", sRef_unparseOpt (s))); | |
7937 | } else { | |
7938 | stateInfo_display (s->aliasinfo, message ("Storage %q", sRef_unparseOpt (s))); | |
7939 | } | |
616915dd | 7940 | } |
7941 | } | |
7942 | } | |
7943 | ||
7944 | void | |
7945 | sRef_mergeNullState (sRef s, nstate n) | |
7946 | { | |
6483a926 | 7947 | if (sRef_isReasonable (s)) |
616915dd | 7948 | { |
7949 | nstate old; | |
7950 | ||
28bf4b0b | 7951 | old = sRef_getNullState (s); |
616915dd | 7952 | |
7953 | if (n != old && n != NS_UNKNOWN) | |
28bf4b0b | 7954 | { |
b87215ab | 7955 | sRef_setNullState (s, n, g_currentloc); |
616915dd | 7956 | } |
7957 | } | |
7958 | else | |
7959 | { | |
7960 | llbuglit ("sRef_mergeNullState: invalid"); | |
7961 | } | |
7962 | } | |
7963 | ||
7964 | bool | |
7965 | sRef_possiblyNull (sRef s) | |
7966 | { | |
6483a926 | 7967 | if (sRef_isReasonable (s)) |
b87215ab | 7968 | { |
7969 | if (sRef_getNullState (s) == NS_ABSNULL) | |
616915dd | 7970 | { |
7971 | ctype rct = ctype_realType (s->type); | |
b87215ab | 7972 | |
616915dd | 7973 | if (ctype_isAbstract (rct)) |
7974 | { | |
7975 | return FALSE; | |
7976 | } | |
7977 | else | |
7978 | { | |
7979 | if (ctype_isUser (rct)) | |
7980 | { | |
7981 | uentry ue = usymtab_getTypeEntry (ctype_typeId (rct)); | |
7982 | ||
7983 | return (nstate_possiblyNull | |
7984 | (sRef_getNullState (uentry_getSref (ue)))); | |
7985 | } | |
7986 | else | |
7987 | { | |
7988 | return FALSE; | |
7989 | } | |
7990 | } | |
7991 | } | |
7992 | else | |
7993 | { | |
28bf4b0b | 7994 | return nstate_possiblyNull (sRef_getNullState (s)); |
616915dd | 7995 | } |
7996 | } | |
b87215ab | 7997 | |
616915dd | 7998 | return FALSE; |
7999 | } | |
8000 | ||
8001 | cstring | |
8002 | sRef_getScopeName (sRef s) | |
8003 | { | |
8004 | sRef base = sRef_getRootBase (s); | |
8005 | ||
8006 | if (sRef_isRealGlobal (base)) | |
8007 | { | |
8008 | return (cstring_makeLiteralTemp ("Global")); | |
8009 | } | |
8010 | else if (sRef_isFileStatic (base)) | |
8011 | { | |
8012 | return (cstring_makeLiteralTemp ("Static")); | |
8013 | } | |
8014 | else | |
8015 | { | |
8016 | return (cstring_makeLiteralTemp ("Local")); | |
8017 | } | |
8018 | } | |
8019 | ||
8020 | cstring | |
8021 | sRef_unparseScope (sRef s) | |
8022 | { | |
8023 | sRef base = sRef_getRootBase (s); | |
8024 | ||
8025 | if (sRef_isRealGlobal (base)) | |
8026 | { | |
8027 | return (cstring_makeLiteralTemp ("global")); | |
8028 | } | |
8029 | else if (sRef_isFileStatic (base)) | |
8030 | { | |
8031 | return (cstring_makeLiteralTemp ("file static")); | |
8032 | } | |
8033 | else | |
8034 | { | |
8035 | BADEXIT; | |
8036 | } | |
8037 | } | |
8038 | ||
8039 | int | |
8040 | sRef_getScope (sRef s) | |
8041 | { | |
6483a926 | 8042 | llassert (sRef_isReasonable (s)); |
616915dd | 8043 | |
8044 | if (sRef_isCvar (s)) | |
8045 | { | |
8046 | return s->info->cvar->lexlevel; | |
8047 | } | |
8048 | else if (sRef_isParam (s)) | |
8049 | { | |
8050 | return paramsScope; | |
8051 | } | |
8052 | else | |
8053 | { | |
8054 | return fileScope; | |
8055 | } | |
8056 | } | |
8057 | ||
8058 | bool | |
8059 | sRef_isDead (sRef s) | |
8060 | { | |
6483a926 | 8061 | return (sRef_isReasonable (s) && (s)->defstate == SS_DEAD); |
616915dd | 8062 | } |
8063 | ||
8064 | bool | |
8065 | sRef_isDeadStorage (sRef s) | |
8066 | { | |
6483a926 | 8067 | if (sRef_isReasonable (s)) |
616915dd | 8068 | { |
8069 | if (s->defstate == SS_DEAD | |
8070 | || s->defstate == SS_UNUSEABLE | |
8071 | || s->defstate == SS_UNDEFINED | |
8072 | || s->defstate == SS_UNKNOWN) | |
8073 | { | |
8074 | return TRUE; | |
8075 | } | |
8076 | else | |
8077 | { | |
8078 | return (sRef_isDefinitelyNull (s)); | |
8079 | } | |
8080 | } | |
8081 | else | |
8082 | { | |
8083 | return FALSE; | |
8084 | } | |
8085 | } | |
8086 | ||
8087 | bool | |
8088 | sRef_isPossiblyDead (sRef s) | |
8089 | { | |
6483a926 | 8090 | return (sRef_isReasonable (s) && s->defstate == SS_HOFFA); |
616915dd | 8091 | } |
8092 | ||
8093 | bool sRef_isStateLive (sRef s) | |
8094 | { | |
6483a926 | 8095 | if (sRef_isReasonable (s)) |
616915dd | 8096 | { |
8097 | sstate ds = s->defstate; | |
8098 | ||
8099 | return (!(ds == SS_UNDEFINED | |
8100 | || ds == SS_DEAD | |
8101 | || ds == SS_UNUSEABLE | |
8102 | || ds == SS_HOFFA)); | |
8103 | } | |
8104 | else | |
8105 | { | |
8106 | return FALSE; | |
8107 | } | |
8108 | } | |
8109 | ||
8110 | ||
8111 | bool sRef_isStateUndefined (sRef s) | |
8112 | { | |
6483a926 | 8113 | return ((sRef_isReasonable(s)) && ((s)->defstate == SS_UNDEFINED)); |
616915dd | 8114 | } |
8115 | ||
8116 | bool sRef_isJustAllocated (sRef s) | |
8117 | { | |
8118 | if (sRef_isAllocated (s)) | |
8119 | { | |
8120 | sRefSet_allElements (s->deriv, el) | |
8121 | { | |
8122 | if (!(sRef_isStateUndefined (el) || sRef_isUnuseable (el))) | |
8123 | { | |
8124 | return FALSE; | |
8125 | } | |
8126 | } end_sRefSet_allElements ; | |
8127 | ||
8128 | return TRUE; | |
8129 | } | |
8130 | ||
8131 | return FALSE; | |
8132 | } | |
8133 | ||
8134 | static bool | |
8135 | sRef_isAllocatedStorage (sRef s) | |
8136 | { | |
6483a926 | 8137 | if (sRef_isReasonable (s) && ynm_toBoolStrict (sRef_isValidLvalue (s))) |
616915dd | 8138 | { |
8139 | return (ctype_isVisiblySharable (sRef_getType (s))); | |
8140 | } | |
8141 | else | |
8142 | { | |
8143 | return FALSE; | |
8144 | } | |
8145 | } | |
8146 | ||
8147 | bool | |
8148 | sRef_isUnuseable (sRef s) | |
8149 | { | |
8150 | return ((sRef_isValid(s)) && ((s)->defstate == SS_UNUSEABLE)); | |
8151 | } | |
8152 | ||
8153 | bool | |
8154 | sRef_perhapsNull (sRef s) | |
8155 | { | |
6483a926 | 8156 | if (sRef_isReasonable (s)) |
616915dd | 8157 | { |
28bf4b0b | 8158 | if (sRef_getNullState (s) == NS_ABSNULL) |
616915dd | 8159 | { |
8160 | ctype rct = ctype_realType (s->type); | |
8161 | ||
8162 | if (ctype_isAbstract (rct)) | |
8163 | { | |
8164 | return FALSE; | |
8165 | } | |
8166 | else | |
8167 | { | |
8168 | if (ctype_isUser (rct)) | |
8169 | { | |
8170 | uentry ue = usymtab_getTypeEntry (ctype_typeId (rct)); | |
8171 | ||
8172 | return (nstate_perhapsNull | |
8173 | (sRef_getNullState (uentry_getSref (ue)))); | |
8174 | } | |
8175 | else | |
8176 | { | |
8177 | return FALSE; | |
8178 | } | |
8179 | } | |
8180 | } | |
8181 | else | |
8182 | { | |
28bf4b0b | 8183 | return nstate_perhapsNull (sRef_getNullState (s)); |
616915dd | 8184 | } |
8185 | } | |
8186 | ||
8187 | return FALSE; | |
8188 | } | |
8189 | ||
8190 | /* | |
8191 | ** definitelyNull --- called when TRUE is good | |
8192 | */ | |
8193 | ||
8194 | bool | |
8195 | sRef_definitelyNull (sRef s) | |
8196 | { | |
6483a926 | 8197 | return (sRef_isReasonable (s) |
28bf4b0b | 8198 | && (sRef_getNullState (s) == NS_DEFNULL || sRef_getNullState (s) == NS_CONSTNULL)); |
616915dd | 8199 | } |
8200 | ||
8201 | /* | |
8202 | ** based on sRef_similar | |
8203 | */ | |
8204 | ||
8205 | void | |
8206 | sRef_setDerivNullState (sRef set, sRef guide, nstate ns) | |
8207 | { | |
6483a926 | 8208 | if (sRef_isReasonable (set)) |
616915dd | 8209 | { |
8210 | sRef deriv = sRef_getDeriv (set, guide); | |
8211 | ||
6483a926 | 8212 | if (sRef_isReasonable (deriv)) |
616915dd | 8213 | { |
28bf4b0b | 8214 | sRef_setNullStateN (deriv, ns); |
616915dd | 8215 | } |
8216 | } | |
8217 | } | |
8218 | ||
8219 | static /*@exposed@*/ sRef | |
8220 | sRef_getDeriv (/*@returned@*/ /*@notnull@*/ sRef set, sRef guide) | |
8221 | { | |
6483a926 | 8222 | llassert (sRef_isReasonable (set)); |
8223 | llassert (sRef_isReasonable (guide)); | |
616915dd | 8224 | |
8225 | switch (guide->kind) | |
8226 | { | |
8227 | case SK_CVAR: | |
6483a926 | 8228 | llassert (set->kind == SK_CVAR); |
616915dd | 8229 | return set; |
8230 | ||
8231 | case SK_PARAM: | |
8232 | llassert (set->kind == guide->kind); | |
8233 | llassert (set->info->paramno == guide->info->paramno); | |
616915dd | 8234 | return set; |
8235 | ||
8236 | case SK_ARRAYFETCH: | |
8237 | ||
8238 | if (set->kind == SK_ARRAYFETCH | |
8239 | && (sRef_similar (set->info->arrayfetch->arr, | |
8240 | guide->info->arrayfetch->arr))) | |
8241 | { | |
8242 | return set; | |
8243 | } | |
8244 | else | |
8245 | { | |
8246 | return (sRef_makeAnyArrayFetch | |
8247 | (sRef_getDeriv (set, guide->info->arrayfetch->arr))); | |
8248 | } | |
8249 | ||
8250 | case SK_PTR: | |
8251 | ||
8252 | if (set->kind == SK_PTR && sRef_similar (set->info->ref, guide->info->ref)) | |
8253 | { | |
8254 | return set; | |
8255 | } | |
8256 | else | |
8257 | { | |
8258 | return (sRef_makePointer (sRef_getDeriv (set, guide->info->ref))); | |
8259 | } | |
8260 | ||
8261 | case SK_FIELD: | |
8262 | ||
8263 | if ((set->kind == SK_FIELD && | |
8264 | (sRef_similar (set->info->field->rec, guide->info->field->rec) && | |
8265 | cstring_equal (set->info->field->field, guide->info->field->field)))) | |
8266 | { | |
8267 | return set; | |
8268 | } | |
8269 | else | |
8270 | { | |
8271 | return (sRef_makeField (sRef_getDeriv (set, guide->info->field->rec), | |
8272 | guide->info->field->field)); | |
8273 | } | |
8274 | case SK_ADR: | |
8275 | ||
8276 | if ((set->kind == SK_ADR) && sRef_similar (set->info->ref, guide->info->ref)) | |
8277 | { | |
8278 | return set; | |
8279 | } | |
8280 | else | |
8281 | { | |
8282 | return (sRef_makeAddress (sRef_getDeriv (set, guide->info->ref))); | |
8283 | } | |
8284 | ||
8285 | case SK_CONJ: | |
8286 | ||
8287 | return sRef_undefined; | |
8288 | ||
8289 | case SK_RESULT: | |
8290 | case SK_SPECIAL: | |
8291 | case SK_UNCONSTRAINED: | |
8292 | case SK_TYPE: | |
8293 | case SK_CONST: | |
8294 | case SK_NEW: | |
8295 | case SK_UNKNOWN: | |
8296 | case SK_OBJECT: | |
8297 | case SK_DERIVED: | |
8298 | case SK_EXTERNAL: | |
8299 | return sRef_undefined; | |
8300 | } | |
8301 | ||
8302 | BADEXIT; | |
8303 | } | |
8304 | ||
8305 | /* | |
8306 | ** sRef_aliasCheckPred | |
8307 | ** | |
8308 | ** A confusing but spiffy function: | |
8309 | ** | |
8310 | ** Calls predf (s, e, text, <alias>) on s and all of s's aliases | |
8311 | ** (unless checkAliases (s) is FALSE). | |
8312 | ** | |
8313 | ** For alias calls, calls as | |
8314 | ** predf (alias, e, text, s) | |
8315 | */ | |
8316 | ||
8317 | void | |
8318 | sRef_aliasCheckPred (bool (predf) (sRef, exprNode, sRef, exprNode), | |
8319 | /*@null@*/ bool (checkAliases) (sRef), | |
8320 | sRef s, exprNode e, exprNode err) | |
8321 | { | |
8322 | bool error = (*predf)(s, e, sRef_undefined, err); | |
8323 | ||
8324 | ||
8325 | if (checkAliases != NULL && !(checkAliases (s))) | |
8326 | { | |
8327 | /* don't check aliases */ | |
8328 | } | |
8329 | else | |
8330 | { | |
8331 | sRefSet aliases = usymtab_allAliases (s); | |
616915dd | 8332 | |
8333 | sRefSet_realElements (aliases, current) | |
8334 | { | |
6483a926 | 8335 | if (sRef_isReasonable (current)) |
616915dd | 8336 | { |
6483a926 | 8337 | if (sRef_isReasonable (current)) |
616915dd | 8338 | { |
6483a926 | 8339 | if (!sRef_similar (current, s) |
8340 | || (error && sRef_sameName (current, s))) | |
8341 | { | |
8342 | (void) (*predf)(current, e, s, err); | |
8343 | } | |
616915dd | 8344 | } |
6483a926 | 8345 | else |
8346 | { | |
8347 | llcontbug (message ("Invalid sRef as alias field of %s", sRef_unparse (s))); | |
8348 | } | |
8349 | } | |
616915dd | 8350 | } end_sRefSet_realElements; |
8351 | ||
8352 | sRefSet_free (aliases); | |
8353 | } | |
8354 | } | |
8355 | ||
8356 | /* | |
8357 | ** return TRUE iff predf (s) is true for s or any alias of s | |
8358 | */ | |
8359 | ||
8360 | bool | |
8361 | sRef_aliasCheckSimplePred (sRefTest predf, sRef s) | |
8362 | { | |
8363 | ||
8364 | if ((*predf)(s)) | |
8365 | { | |
8366 | return TRUE; | |
8367 | } | |
8368 | else | |
8369 | { | |
8370 | sRefSet aliases; | |
8371 | ||
8372 | aliases = usymtab_allAliases (s); | |
8373 | ||
8374 | sRefSet_realElements (aliases, current) | |
8375 | { | |
6483a926 | 8376 | if (sRef_isReasonable (current)) |
616915dd | 8377 | { |
8378 | sRef cref = sRef_updateSref (current); | |
8379 | ||
8380 | /* Whoa! a very kludgey way to make sure the right sref is used | |
8381 | ** where there is a conditional symbol table. I am beginning | |
8382 | ** to think that having a conditional symbol table wasn't such | |
8383 | ** a great idea. ;( | |
8384 | */ | |
8385 | ||
616915dd | 8386 | if ((*predf)(cref)) |
8387 | { | |
28bf4b0b | 8388 | DPRINTF (("Checking alias: %s", sRef_unparseFull (cref))); |
616915dd | 8389 | sRefSet_free (aliases); |
8390 | return TRUE; | |
8391 | } | |
8392 | } | |
8393 | } end_sRefSet_realElements; | |
8394 | ||
8395 | sRefSet_free (aliases); | |
8396 | } | |
8397 | return FALSE; | |
8398 | } | |
8399 | ||
8400 | bool | |
8401 | sRef_aliasCompleteSimplePred (bool (predf) (sRef), sRef s) | |
8402 | { | |
8403 | sRefSet aliases; | |
8404 | bool result = FALSE; | |
8405 | ||
8406 | ||
8407 | aliases = usymtab_allAliases (s); | |
8408 | ||
8409 | if ((*predf)(s)) result = TRUE; | |
8410 | ||
8411 | ||
8412 | sRefSet_realElements (aliases, current) | |
8413 | { | |
6483a926 | 8414 | if (sRef_isReasonable (current)) |
616915dd | 8415 | { |
28bf4b0b | 8416 | current = sRef_updateSref (current); |
8417 | if ((*predf)(current)) result = TRUE; | |
616915dd | 8418 | } |
8419 | } end_sRefSet_realElements; | |
8420 | ||
8421 | sRefSet_free (aliases); | |
8422 | return result; | |
8423 | } | |
8424 | ||
1d239d69 | 8425 | void |
616915dd | 8426 | sRef_aliasSetComplete (void (predf) (sRef, fileloc), sRef s, fileloc loc) |
8427 | { | |
8428 | sRefSet aliases; | |
8429 | ||
8430 | aliases = usymtab_allAliases (s); | |
8431 | ||
909cf5eb | 8432 | DPRINTF (("All aliases: %s --> %s", sRef_unparseFull (s), sRefSet_unparseFull (aliases))); |
28bf4b0b | 8433 | |
616915dd | 8434 | (*predf)(s, loc); |
8435 | ||
8436 | sRefSet_realElements (aliases, current) | |
8437 | { | |
6483a926 | 8438 | if (sRef_isReasonable (current)) |
616915dd | 8439 | { |
909cf5eb | 8440 | DPRINTF (("Update: %s", sRef_unparseFull (current))); |
616915dd | 8441 | current = sRef_updateSref (current); |
909cf5eb | 8442 | DPRINTF (("Updated ==> %s", sRef_unparseFull (current))); |
28bf4b0b | 8443 | ((*predf)(current, loc)); |
393e573f | 8444 | DPRINTF (("Killed: %s", sRef_unparseFull (current))); |
616915dd | 8445 | } |
8446 | } end_sRefSet_realElements; | |
8447 | ||
8448 | sRefSet_free (aliases); | |
8449 | } | |
8450 | ||
1d239d69 | 8451 | void |
8452 | sRef_aliasSetCompleteParam (void (predf) (sRef, int, fileloc), sRef s, | |
8453 | int kind, fileloc loc) | |
616915dd | 8454 | { |
8455 | sRefSet aliases; | |
68de3f33 | 8456 | |
8457 | if (sRef_isDeep (s)) | |
8458 | { | |
8459 | aliases = usymtab_allAliases (s); | |
8460 | } | |
8461 | else | |
8462 | { | |
8463 | aliases = usymtab_aliasedBy (s); | |
8464 | } | |
616915dd | 8465 | |
68de3f33 | 8466 | (*predf)(s, kind, loc); |
8467 | ||
8468 | sRefSet_realElements (aliases, current) | |
8469 | { | |
6483a926 | 8470 | if (sRef_isReasonable (current)) |
68de3f33 | 8471 | { |
8472 | current = sRef_updateSref (current); | |
8473 | ((*predf)(current, kind, loc)); | |
8474 | } | |
8475 | } end_sRefSet_realElements; | |
8476 | ||
8477 | sRefSet_free (aliases); | |
8478 | } | |
8479 | ||
8480 | /* | |
8481 | ** Version of aliasSetCompleteParam for alkind parameters | |
8482 | */ | |
8483 | ||
8484 | void | |
8485 | sRef_aliasSetCompleteAlkParam (void (predf) (sRef, alkind, fileloc), sRef s, | |
8486 | alkind kind, fileloc loc) | |
8487 | { | |
8488 | sRefSet aliases; | |
616915dd | 8489 | |
8490 | if (sRef_isDeep (s)) | |
8491 | { | |
8492 | aliases = usymtab_allAliases (s); | |
8493 | } | |
8494 | else | |
8495 | { | |
8496 | aliases = usymtab_aliasedBy (s); | |
8497 | } | |
8498 | ||
8499 | (*predf)(s, kind, loc); | |
8500 | ||
8501 | sRefSet_realElements (aliases, current) | |
8502 | { | |
6483a926 | 8503 | if (sRef_isReasonable (current)) |
616915dd | 8504 | { |
8505 | current = sRef_updateSref (current); | |
28bf4b0b | 8506 | ((*predf)(current, kind, loc)); |
616915dd | 8507 | } |
8508 | } end_sRefSet_realElements; | |
8509 | ||
8510 | sRefSet_free (aliases); | |
8511 | } | |
8512 | ||
8513 | static void | |
8514 | sRef_innerAliasSetComplete (void (predf) (sRef, fileloc), sRef s, fileloc loc) | |
8515 | { | |
8516 | sRef inner; | |
8517 | sRefSet aliases; | |
8518 | ctype ct; | |
8519 | ||
6483a926 | 8520 | if (!sRef_isReasonable (s)) return; |
616915dd | 8521 | |
616915dd | 8522 | /* |
8523 | ** Type equivalence checking is necessary --- there might be casting. | |
8524 | */ | |
8525 | ||
8526 | (*predf)(s, loc); | |
8527 | ||
8528 | switch (s->kind) | |
8529 | { | |
8530 | case SK_UNCONSTRAINED: | |
8531 | case SK_CVAR: | |
8532 | case SK_PARAM: | |
8533 | break; | |
8534 | case SK_PTR: | |
8535 | inner = s->info->ref; | |
8536 | aliases = usymtab_allAliases (inner); | |
8537 | ct = sRef_getType (inner); | |
616915dd | 8538 | |
8539 | sRefSet_realElements (aliases, current) | |
8540 | { | |
6483a926 | 8541 | if (sRef_isReasonable (current)) |
616915dd | 8542 | { |
8543 | current = sRef_updateSref (current); | |
8544 | ||
8545 | if (ctype_equal (ct, sRef_getType (current))) | |
8546 | { | |
8547 | sRef ptr = sRef_makePointer (current); | |
616915dd | 8548 | ((*predf)(ptr, loc)); |
8549 | } | |
8550 | } | |
8551 | } end_sRefSet_realElements; | |
8552 | ||
8553 | sRefSet_free (aliases); | |
8554 | break; | |
8555 | case SK_ARRAYFETCH: | |
8556 | inner = s->info->arrayfetch->arr; | |
8557 | aliases = usymtab_allAliases (inner); | |
8558 | ct = sRef_getType (inner); | |
8559 | ||
3120b462 | 8560 | DPRINTF (("Array fetch: %s", sRefSet_unparse (aliases))); |
8561 | ||
616915dd | 8562 | sRefSet_realElements (aliases, current) |
8563 | { | |
6483a926 | 8564 | if (sRef_isReasonable (current)) |
616915dd | 8565 | { |
8566 | current = sRef_updateSref (current); | |
3120b462 | 8567 | DPRINTF (("Current: %s", sRef_unparseFull (current))); |
8568 | ||
616915dd | 8569 | if (ctype_equal (ct, sRef_getType (current))) |
8570 | { | |
616915dd | 8571 | if (s->info->arrayfetch->indknown) |
8572 | { | |
8573 | sRef af = sRef_makeArrayFetchKnown (current, s->info->arrayfetch->ind); | |
3120b462 | 8574 | DPRINTF (("Defining: %s", sRef_unparseFull (af))); |
1d239d69 | 8575 | /* evans 2001-08-27 This isn't true: |
8576 | llassert (af->info->arrayfetch->arr == current); | |
8577 | see comments in buildArrayFetchKnown | |
8578 | */ | |
616915dd | 8579 | ((*predf)(af, loc)); |
8580 | } | |
8581 | else | |
8582 | { | |
8583 | sRef af = sRef_makeArrayFetch (current); | |
1d239d69 | 8584 | /* evans 2001-08-27 This isn't true: |
8585 | llassert (af->info->arrayfetch->arr == current); | |
8586 | see comments in buildArrayFetch | |
8587 | */ | |
3120b462 | 8588 | DPRINTF (("Defining: %s", sRef_unparseFull (af))); |
616915dd | 8589 | ((*predf)(af, loc)); |
8590 | } | |
8591 | } | |
3120b462 | 8592 | else |
8593 | { | |
8594 | DPRINTF (("Type mismatch: %s / %s", | |
8595 | ctype_unparse (ct), | |
8596 | ctype_unparse (sRef_getType (current)))); | |
8597 | } | |
616915dd | 8598 | } |
8599 | } end_sRefSet_realElements; | |
8600 | ||
8601 | sRefSet_free (aliases); | |
8602 | break; | |
8603 | case SK_FIELD: | |
8604 | inner = s->info->field->rec; | |
8605 | aliases = usymtab_allAliases (inner); | |
8606 | ct = sRef_getType (inner); | |
616915dd | 8607 | |
8608 | sRefSet_realElements (aliases, current) | |
8609 | { | |
6483a926 | 8610 | if (sRef_isReasonable (current)) |
616915dd | 8611 | { |
8612 | current = sRef_updateSref (current); | |
8613 | ||
8614 | if (ctype_equal (ct, sRef_getType (current))) | |
8615 | { | |
8616 | sRef f = sRef_makeField (current, s->info->field->field); | |
8617 | ||
8618 | ((*predf)(f, loc)); | |
8619 | } | |
8620 | } | |
8621 | } end_sRefSet_realElements; | |
8622 | ||
8623 | sRefSet_free (aliases); | |
8624 | break; | |
8625 | case SK_CONJ: | |
8626 | sRef_innerAliasSetComplete (predf, s->info->conj->a, loc); | |
8627 | sRef_innerAliasSetComplete (predf, s->info->conj->b, loc); | |
8628 | break; | |
8629 | case SK_SPECIAL: | |
8630 | case SK_ADR: | |
8631 | case SK_TYPE: | |
8632 | case SK_CONST: | |
8633 | case SK_NEW: | |
8634 | case SK_UNKNOWN: | |
8635 | case SK_OBJECT: | |
8636 | case SK_DERIVED: | |
8637 | case SK_EXTERNAL: | |
8638 | case SK_RESULT: | |
8639 | break; | |
8640 | } | |
8641 | } | |
8642 | ||
8643 | static void | |
8644 | sRef_innerAliasSetCompleteParam (void (predf) (sRef, sRef), sRef s, sRef t) | |
8645 | { | |
8646 | sRef inner; | |
8647 | sRefSet aliases; | |
8648 | ctype ct; | |
8649 | ||
6483a926 | 8650 | if (!sRef_isReasonable (s)) return; |
616915dd | 8651 | |
616915dd | 8652 | /* |
8653 | ** Type equivalence checking is necessary --- there might be casting. | |
8654 | */ | |
8655 | ||
8656 | (*predf)(s, t); | |
8657 | ||
8658 | switch (s->kind) | |
8659 | { | |
8660 | case SK_UNCONSTRAINED: | |
8661 | case SK_CVAR: | |
8662 | case SK_PARAM: | |
8663 | break; | |
8664 | case SK_PTR: | |
8665 | inner = s->info->ref; | |
8666 | aliases = usymtab_allAliases (inner); | |
8667 | ct = sRef_getType (inner); | |
2e127cb8 | 8668 | |
616915dd | 8669 | sRefSet_realElements (aliases, current) |
8670 | { | |
6483a926 | 8671 | if (sRef_isReasonable (current)) |
616915dd | 8672 | { |
8673 | current = sRef_updateSref (current); | |
8674 | ||
8675 | if (ctype_equal (ct, sRef_getType (current))) | |
8676 | { | |
8677 | sRef ptr = sRef_makePointer (current); | |
8678 | ||
8679 | ((*predf)(ptr, t)); | |
8680 | } | |
8681 | } | |
8682 | } end_sRefSet_realElements; | |
8683 | ||
8684 | sRefSet_free (aliases); | |
8685 | break; | |
8686 | case SK_ARRAYFETCH: | |
8687 | inner = s->info->arrayfetch->arr; | |
8688 | aliases = usymtab_allAliases (inner); | |
8689 | ct = sRef_getType (inner); | |
8690 | ||
8691 | sRefSet_realElements (aliases, current) | |
8692 | { | |
6483a926 | 8693 | if (sRef_isReasonable (current)) |
616915dd | 8694 | { |
8695 | current = sRef_updateSref (current); | |
8696 | ||
8697 | if (ctype_equal (ct, sRef_getType (current))) | |
8698 | { | |
8699 | ||
8700 | if (s->info->arrayfetch->indknown) | |
8701 | { | |
8702 | sRef af = sRef_makeArrayFetchKnown (current, s->info->arrayfetch->ind); | |
8703 | ||
8704 | ((*predf)(af, t)); | |
8705 | } | |
8706 | else | |
8707 | { | |
8708 | sRef af = sRef_makeArrayFetch (current); | |
8709 | ||
8710 | ((*predf)(af, t)); | |
8711 | } | |
8712 | } | |
8713 | } | |
8714 | } end_sRefSet_realElements; | |
8715 | ||
8716 | sRefSet_free (aliases); | |
8717 | break; | |
8718 | case SK_FIELD: | |
8719 | inner = s->info->field->rec; | |
8720 | aliases = usymtab_allAliases (inner); | |
8721 | ct = sRef_getType (inner); | |
8722 | ||
8723 | ||
8724 | sRefSet_realElements (aliases, current) | |
8725 | { | |
6483a926 | 8726 | if (sRef_isReasonable (current)) |
616915dd | 8727 | { |
8728 | current = sRef_updateSref (current); | |
8729 | ||
8730 | if (ctype_equal (ct, sRef_getType (current))) | |
8731 | { | |
8732 | sRef f = sRef_makeField (current, s->info->field->field); | |
8733 | ||
8734 | ((*predf)(f, t)); | |
8735 | } | |
8736 | } | |
8737 | } end_sRefSet_realElements; | |
8738 | ||
8739 | sRefSet_free (aliases); | |
8740 | break; | |
8741 | case SK_CONJ: | |
8742 | sRef_innerAliasSetCompleteParam (predf, s->info->conj->a, t); | |
8743 | sRef_innerAliasSetCompleteParam (predf, s->info->conj->b, t); | |
8744 | break; | |
8745 | case SK_SPECIAL: | |
8746 | case SK_ADR: | |
8747 | case SK_TYPE: | |
8748 | case SK_CONST: | |
8749 | case SK_NEW: | |
8750 | case SK_UNKNOWN: | |
8751 | case SK_OBJECT: | |
8752 | case SK_DERIVED: | |
8753 | case SK_EXTERNAL: | |
8754 | case SK_RESULT: | |
8755 | break; | |
8756 | } | |
8757 | } | |
8758 | ||
8759 | static void sRef_combineExKinds (/*@notnull@*/ sRef res, /*@notnull@*/ sRef other) | |
8760 | { | |
8761 | exkind a1 = sRef_getExKind (res); | |
8762 | exkind a2 = sRef_getExKind (other); | |
8763 | ||
8764 | if (a1 == a2 || a2 == XO_UNKNOWN) | |
8765 | { | |
8766 | ; | |
8767 | } | |
8768 | else if (a1 == XO_UNKNOWN) | |
8769 | { | |
28bf4b0b | 8770 | res->expinfo = stateInfo_update (res->expinfo, other->expinfo); |
616915dd | 8771 | res->expkind = a2; |
8772 | } | |
8773 | else | |
8774 | { | |
8775 | res->expkind = XO_OBSERVER; | |
8776 | } | |
8777 | } | |
8778 | ||
8779 | /* | |
8780 | ** Currently, this is a very ad hoc implementation, with lots of fixes to | |
8781 | ** make real code work okay. I need to come up with some more general | |
8782 | ** rules or principles here. | |
8783 | */ | |
8784 | ||
8785 | static void | |
8786 | sRef_combineAliasKindsError (/*@notnull@*/ sRef res, | |
8787 | /*@notnull@*/ sRef other, | |
8788 | clause cl, fileloc loc) | |
8789 | { | |
8790 | bool hasError = FALSE; | |
8791 | alkind ares = sRef_getAliasKind (res); | |
8792 | alkind aother = sRef_getAliasKind (other); | |
8793 | ||
28bf4b0b | 8794 | sRef_checkMutable (res); |
8795 | ||
616915dd | 8796 | if (alkind_isDependent (ares)) |
8797 | { | |
8798 | if (aother == AK_KEPT) | |
8799 | { | |
28bf4b0b | 8800 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 8801 | res->aliaskind = AK_KEPT; |
8802 | } | |
8803 | else | |
8804 | { | |
8805 | if (aother == AK_LOCAL || aother == AK_STATIC | |
8806 | || alkind_isTemp (aother)) | |
8807 | { | |
28bf4b0b | 8808 | DPRINTF (("Setting dependent: %s", sRef_unparseFull (res))); |
616915dd | 8809 | res->aliaskind = AK_DEPENDENT; |
8810 | } | |
8811 | } | |
8812 | } | |
8813 | else if (alkind_isDependent (aother)) | |
8814 | { | |
8815 | if (ares == AK_KEPT) | |
8816 | { | |
8817 | res->aliaskind = AK_KEPT; | |
8818 | } | |
8819 | else | |
8820 | { | |
8821 | if (ares == AK_LOCAL || ares == AK_STATIC || alkind_isTemp (ares)) | |
8822 | { | |
28bf4b0b | 8823 | DPRINTF (("Setting dependent: %s", sRef_unparseFull (res))); |
8824 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); | |
616915dd | 8825 | res->aliaskind = AK_DEPENDENT; |
8826 | } | |
8827 | } | |
8828 | } | |
8829 | else if ((ares == AK_LOCAL || ares == AK_UNIQUE | |
8830 | || ares == AK_STATIC || alkind_isTemp (ares)) | |
8831 | && sRef_isFresh (other)) | |
8832 | { | |
8833 | /* | |
8834 | ** cases like: if (s == NULL) s = malloc...; | |
8835 | ** don't generate errors | |
8836 | */ | |
8837 | ||
28bf4b0b | 8838 | if (usymtab_isAltDefinitelyNullDeep (res)) |
616915dd | 8839 | { |
8840 | res->aliaskind = ares; | |
8841 | } | |
8842 | else | |
8843 | { | |
8844 | hasError = TRUE; | |
8845 | } | |
8846 | } | |
8847 | else if ((aother == AK_LOCAL || aother == AK_UNIQUE | |
8848 | || aother == AK_STATIC || alkind_isTemp (aother)) | |
8849 | && sRef_isFresh (res)) | |
8850 | { | |
8851 | /* | |
8852 | ** cases like: if (s == NULL) s = malloc...; | |
8853 | ** don't generate errors | |
8854 | */ | |
8855 | ||
28bf4b0b | 8856 | if (usymtab_isDefinitelyNullDeep (other)) |
616915dd | 8857 | { |
28bf4b0b | 8858 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 8859 | res->aliaskind = aother; |
8860 | } | |
8861 | else | |
8862 | { | |
8863 | hasError = TRUE; | |
8864 | } | |
8865 | } | |
8866 | else if (ares == AK_NEWREF && aother == AK_REFCOUNTED | |
8867 | && sRef_isConst (other)) | |
8868 | { | |
8869 | res->aliaskind = AK_NEWREF; | |
8870 | } | |
8871 | else if (aother == AK_NEWREF && ares == AK_REFCOUNTED | |
8872 | && sRef_isConst (res)) | |
8873 | { | |
28bf4b0b | 8874 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 8875 | res->aliaskind = AK_NEWREF; |
8876 | } | |
8877 | else if (sRef_isLocalVar (res) | |
8878 | && ((ares == AK_KEPT && aother == AK_LOCAL) | |
8879 | || (aother == AK_KEPT && ares == AK_LOCAL))) | |
8880 | { | |
8881 | res->aliaskind = AK_KEPT; | |
8882 | } | |
6fcd0b1e | 8883 | else if ((ares == AK_OWNED && aother == AK_ONLY) |
8884 | || (aother == AK_OWNED && ares == AK_ONLY)) | |
8885 | { | |
8886 | res->aliaskind = AK_OWNED; | |
8887 | ||
8888 | if (aother == AK_OWNED) | |
8889 | { | |
8890 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); | |
8891 | } | |
8892 | } | |
616915dd | 8893 | else |
8894 | { | |
8895 | hasError = TRUE; | |
8896 | } | |
8897 | ||
8898 | if (hasError) | |
8899 | { | |
8900 | if (sRef_isThroughArrayFetch (res)) | |
8901 | { | |
8902 | if (optgenerror2 | |
8903 | (FLG_BRANCHSTATE, FLG_STRICTBRANCHSTATE, | |
8904 | message | |
8905 | ("Clauses exit with %q possibly referencing %s storage %s, " | |
8906 | "%s storage %s", | |
8907 | sRef_unparse (res), | |
8908 | alkind_unparse (aother), | |
8909 | clause_nameTaken (cl), | |
8910 | alkind_unparse (ares), | |
8911 | clause_nameAlternate (cl)), | |
8912 | loc)) | |
8913 | { | |
8914 | sRef_showAliasInfo (res); | |
8915 | sRef_showAliasInfo (other); | |
8916 | res->aliaskind = AK_ERROR; | |
8917 | } | |
8918 | else | |
8919 | { | |
8920 | if (ares == AK_KEPT || aother == AK_KEPT) | |
8921 | { | |
8922 | sRef_maybeKill (res, loc); | |
28bf4b0b | 8923 | } |
616915dd | 8924 | } |
8925 | } | |
8926 | else | |
8927 | { | |
8928 | if (optgenerror | |
8929 | (FLG_BRANCHSTATE, | |
8930 | message ("Clauses exit with %q referencing %s storage %s, " | |
8931 | "%s storage %s", | |
8932 | sRef_unparse (res), | |
8933 | alkind_unparse (aother), | |
8934 | clause_nameTaken (cl), | |
8935 | alkind_unparse (ares), | |
8936 | clause_nameAlternate (cl)), | |
8937 | loc)) | |
8938 | { | |
8939 | sRef_showAliasInfo (res); | |
8940 | sRef_showAliasInfo (other); | |
8941 | ||
8942 | res->aliaskind = AK_ERROR; | |
8943 | } | |
8944 | } | |
8945 | ||
8946 | res->aliaskind = (sRef_isLocalVar (res) ? AK_LOCAL : AK_UNKNOWN); | |
8947 | } | |
8948 | } | |
8949 | ||
8950 | static void | |
8951 | sRef_combineAliasKinds (/*@notnull@*/ sRef res, /*@notnull@*/ sRef other, | |
8952 | clause cl, fileloc loc) | |
8953 | { | |
8954 | alkind ares = sRef_getAliasKind (res); | |
8955 | alkind aother = sRef_getAliasKind (other); | |
8956 | ||
28bf4b0b | 8957 | sRef_checkMutable (res); |
8958 | ||
60868d40 | 8959 | DPRINTF (("Combine alias kinds: \n\t%s / \n\t%s", |
8960 | sRef_unparseFull (res), sRef_unparseFull (other))); | |
616915dd | 8961 | if (alkind_equal (ares, aother) |
8962 | || aother == AK_UNKNOWN | |
8963 | || aother == AK_ERROR) | |
8964 | { | |
8965 | ; /* keep current state */ | |
8966 | } | |
8967 | else if (sRef_isDead (res) || sRef_isDead (other)) | |
8968 | { | |
8969 | /* dead error reported (or storage is dead) */ | |
8970 | res ->aliaskind = AK_ERROR; | |
8971 | } | |
8972 | else if (ares == AK_UNKNOWN || ares == AK_ERROR | |
60868d40 | 8973 | || sRef_isStateUndefined (res) |
8974 | || sRef_isDefinitelyNull (res)) | |
616915dd | 8975 | { |
28bf4b0b | 8976 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 8977 | res->aliaskind = aother; |
8978 | } | |
60868d40 | 8979 | else if (sRef_isStateUndefined (other) |
8980 | || sRef_isDefinitelyNull (other)) | |
616915dd | 8981 | { |
8982 | ; | |
8983 | } | |
8984 | else if (((ares == AK_UNIQUE || alkind_isTemp (ares)) | |
8985 | && aother == AK_LOCAL) | |
8986 | || ((aother == AK_UNIQUE || alkind_isTemp (aother)) | |
8987 | && ares == AK_LOCAL)) | |
8988 | { | |
8989 | if (ares != AK_LOCAL) | |
8990 | { | |
28bf4b0b | 8991 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 8992 | } |
8993 | ||
8994 | res->aliaskind = AK_LOCAL; | |
8995 | } | |
8996 | else if ((ares == AK_OWNED && aother == AK_FRESH) | |
8997 | || (aother == AK_OWNED && ares == AK_FRESH)) | |
8998 | { | |
8999 | if (ares != AK_FRESH) | |
9000 | { | |
28bf4b0b | 9001 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 9002 | } |
9003 | ||
9004 | res->aliaskind = AK_FRESH; | |
9005 | } | |
9006 | else if ((ares == AK_KEEP && aother == AK_FRESH) || | |
9007 | (aother == AK_KEEP && ares == AK_FRESH)) | |
9008 | { | |
9009 | if (ares != AK_KEEP) | |
9010 | { | |
28bf4b0b | 9011 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 9012 | } |
9013 | ||
9014 | res->aliaskind = AK_KEEP; | |
9015 | } | |
9016 | else if ((ares == AK_LOCAL && aother == AK_STACK) || | |
9017 | (aother == AK_LOCAL && ares == AK_STACK)) | |
9018 | { | |
9019 | if (ares != AK_STACK) | |
9020 | { | |
28bf4b0b | 9021 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 9022 | } |
9023 | ||
9024 | res->aliaskind = AK_STACK; | |
9025 | } | |
9026 | else if ((ares == AK_LOCAL | |
9027 | && (aother == AK_OWNED && sRef_isLocalVar (other))) | |
9028 | || (aother == AK_LOCAL | |
9029 | && (ares == AK_OWNED && sRef_isLocalVar (res)))) | |
9030 | { | |
9031 | if (ares != AK_LOCAL) | |
9032 | { | |
28bf4b0b | 9033 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 9034 | } |
9035 | ||
9036 | res->aliaskind = AK_LOCAL; | |
9037 | } | |
9038 | else if ((ares == AK_FRESH && alkind_isOnly (aother)) | |
9039 | || (aother == AK_FRESH && alkind_isOnly (ares))) | |
9040 | { | |
9041 | res->aliaskind = AK_FRESH; | |
9042 | } | |
9043 | else if ((aother == AK_FRESH && sRef_definitelyNull (res)) | |
9044 | || (ares == AK_FRESH && sRef_definitelyNull (other))) | |
9045 | { | |
9046 | if (ares != AK_FRESH) | |
9047 | { | |
28bf4b0b | 9048 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 9049 | res->aliaskind = AK_FRESH; |
9050 | } | |
9051 | } | |
9052 | else if ((sRef_isFresh (res) && sRef_isConst (other)) | |
9053 | || (sRef_isFresh (other) && sRef_isConst (res))) | |
9054 | { | |
9055 | /* | |
9056 | ** for NULL constantants | |
9057 | ** this is bogus! | |
9058 | */ | |
9059 | ||
9060 | if (!sRef_isFresh (res)) | |
9061 | { | |
28bf4b0b | 9062 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 9063 | } |
9064 | ||
9065 | res->aliaskind = AK_FRESH; | |
9066 | } | |
9067 | else if ((alkind_isStatic (aother) && sRef_isConst (res)) | |
9068 | || (alkind_isStatic (ares) && sRef_isConst (other))) | |
9069 | { | |
9070 | if (!alkind_isStatic (ares)) | |
9071 | { | |
28bf4b0b | 9072 | res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo); |
616915dd | 9073 | res->aliaskind = AK_STATIC; |
9074 | } | |
9075 | } | |
9076 | else | |
9077 | { | |
9078 | sRef_combineAliasKindsError (res, other, cl, loc); | |
9079 | } | |
9080 | } | |
9081 | ||
9082 | static void sRef_combineDefState (/*@notnull@*/ sRef res, | |
9083 | /*@notnull@*/ sRef other) | |
9084 | { | |
9085 | sstate s1 = res->defstate; | |
9086 | sstate s2 = other->defstate; | |
9087 | bool flip = FALSE; | |
9088 | ||
28bf4b0b | 9089 | sRef_checkMutable (res); |
9090 | ||
616915dd | 9091 | if (s1 == s2 || s2 == SS_UNKNOWN) |
9092 | { | |
9093 | ; | |
9094 | } | |
9095 | else if (s1 == SS_UNKNOWN) | |
9096 | { | |
9097 | flip = TRUE; | |
9098 | } | |
9099 | else | |
9100 | { | |
9101 | switch (s1) | |
9102 | { | |
9103 | case SS_FIXED: | |
9104 | if (s2 == SS_DEFINED) | |
9105 | { | |
9106 | break; | |
9107 | } | |
9108 | else | |
9109 | { | |
9110 | llcontbuglit ("ssfixed: not implemented"); | |
9111 | flip = TRUE; | |
9112 | } | |
9113 | break; | |
9114 | case SS_DEFINED: | |
9115 | flip = TRUE; | |
9116 | break; | |
9117 | case SS_PDEFINED: | |
9118 | case SS_ALLOCATED: | |
9119 | flip = (s2 != SS_DEFINED); | |
9120 | break; | |
9121 | case SS_HOFFA: | |
9122 | case SS_RELDEF: | |
9123 | case SS_UNUSEABLE: | |
9124 | case SS_UNDEFINED: | |
9125 | case SS_PARTIAL: | |
9126 | case SS_UNDEFGLOB: | |
9127 | case SS_KILLED: | |
9128 | case SS_DEAD: | |
9129 | case SS_SPECIAL: | |
9130 | break; | |
9131 | BADDEFAULT; | |
9132 | } | |
9133 | } | |
9134 | ||
9135 | if (flip) | |
9136 | { | |
28bf4b0b | 9137 | res->definfo = stateInfo_update (res->definfo, other->definfo); |
616915dd | 9138 | res->defstate = s2; |
9139 | } | |
9140 | } | |
9141 | ||
9142 | extern /*@notnull@*/ sRef sRef_getConjA (sRef s) | |
9143 | { | |
9144 | sRef ret; | |
9145 | llassert (sRef_isConj (s)); | |
9146 | ||
9147 | ret = s->info->conj->a; | |
9148 | llassert (ret != NULL); | |
9149 | return ret; | |
9150 | } | |
9151 | ||
9152 | extern /*@notnull@*/ sRef sRef_getConjB (sRef s) | |
9153 | { | |
9154 | sRef ret; | |
9155 | llassert (sRef_isConj (s)); | |
9156 | ||
9157 | ret = s->info->conj->b; | |
9158 | llassert (ret != NULL); | |
9159 | return ret; | |
9160 | } | |
9161 | ||
9162 | extern /*@exposed@*/ sRef sRef_makeArrow (sRef s, /*@dependent@*/ cstring f) | |
9163 | { | |
9164 | sRef p; | |
9165 | sRef ret; | |
28bf4b0b | 9166 | |
9167 | p = sRef_makePointer (s); | |
616915dd | 9168 | ret = sRef_makeField (p, f); |
68de3f33 | 9169 | DPRINTF (("Arrow: %s => %s", |
9170 | sRef_unparseFull (s), sRef_unparseFull (ret))); | |
28bf4b0b | 9171 | return ret; |
616915dd | 9172 | } |
9173 | ||
9174 | extern /*@exposed@*/ sRef sRef_buildArrow (sRef s, cstring f) | |
9175 | { | |
9176 | sRef p; | |
9177 | sRef ret; | |
9178 | ||
9179 | p = sRef_buildPointer (s); | |
9180 | ret = sRef_buildField (p, f); | |
9181 | ||
9182 | return ret; | |
9183 | } | |
9184 | ||
9185 | static /*@null@*/ sinfo sinfo_copy (/*@notnull@*/ sRef s) | |
9186 | { | |
9187 | sinfo ret; | |
9188 | ||
9189 | switch (s->kind) | |
9190 | { | |
9191 | case SK_CVAR: | |
9192 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9193 | ret->cvar = (cref) dmalloc (sizeof (*ret->cvar)); | |
9194 | ret->cvar->lexlevel = s->info->cvar->lexlevel; | |
9195 | ret->cvar->index = s->info->cvar->index; | |
9196 | break; | |
9197 | ||
9198 | case SK_PARAM: | |
9199 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9200 | ret->paramno = s->info->paramno; | |
28bf4b0b | 9201 | llassert (ret->paramno >= -1); |
616915dd | 9202 | break; |
9203 | ||
9204 | case SK_ARRAYFETCH: | |
9205 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9206 | ret->arrayfetch = (ainfo) dmalloc (sizeof (*ret->arrayfetch)); | |
9207 | ret->arrayfetch->indknown = s->info->arrayfetch->indknown; | |
9208 | ret->arrayfetch->ind = s->info->arrayfetch->ind; | |
b73d1009 | 9209 | ret->arrayfetch->arr = s->info->arrayfetch->arr; |
616915dd | 9210 | break; |
9211 | ||
9212 | case SK_FIELD: | |
9213 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9214 | ret->field = (fldinfo) dmalloc (sizeof (*ret->field)); | |
b73d1009 | 9215 | ret->field->rec = s->info->field->rec; |
616915dd | 9216 | ret->field->field = s->info->field->field; |
9217 | break; | |
9218 | ||
9219 | case SK_OBJECT: | |
9220 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9221 | ret->object = s->info->object; | |
9222 | break; | |
9223 | ||
9224 | case SK_PTR: | |
9225 | case SK_ADR: | |
9226 | case SK_DERIVED: | |
9227 | case SK_EXTERNAL: | |
9228 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
28bf4b0b | 9229 | ret->ref = s->info->ref; /* Ref_copy (s->info->ref); */ |
616915dd | 9230 | break; |
9231 | ||
9232 | case SK_CONJ: | |
9233 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9234 | ret->conj = (cjinfo) dmalloc (sizeof (*ret->conj)); | |
28bf4b0b | 9235 | ret->conj->a = s->info->conj->a; /* sRef_copy (s->info->conj->a); */ |
9236 | ret->conj->b = s->info->conj->b; /* sRef_copy (s->info->conj->b);*/ | |
616915dd | 9237 | break; |
9238 | case SK_SPECIAL: | |
9239 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9240 | ret->spec = s->info->spec; | |
9241 | break; | |
6fcd0b1e | 9242 | |
616915dd | 9243 | case SK_UNCONSTRAINED: |
9244 | case SK_NEW: | |
9245 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9246 | ret->fname = s->info->fname; | |
9247 | break; | |
6fcd0b1e | 9248 | |
616915dd | 9249 | case SK_RESULT: |
9250 | case SK_CONST: | |
9251 | case SK_TYPE: | |
9252 | case SK_UNKNOWN: | |
9253 | llassertprint (s->info == NULL, ("s = %s", sRef_unparse (s))); | |
9254 | ret = NULL; | |
9255 | break; | |
9256 | } | |
9257 | ||
9258 | return ret; | |
9259 | } | |
9260 | ||
9261 | static /*@null@*/ sinfo sinfo_fullCopy (/*@notnull@*/ sRef s) | |
9262 | { | |
9263 | sinfo ret; | |
9264 | ||
9265 | /* | |
9266 | ** Since its a full copy, only storage is assigned | |
9267 | ** to dependent fields. | |
9268 | */ | |
9269 | /*@-onlytrans@*/ | |
9270 | ||
9271 | switch (s->kind) | |
9272 | { | |
9273 | case SK_CVAR: | |
9274 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9275 | ret->cvar = (cref) dmalloc (sizeof (*ret->cvar)); | |
9276 | ret->cvar->lexlevel = s->info->cvar->lexlevel; | |
9277 | ret->cvar->index = s->info->cvar->index; | |
9278 | break; | |
9279 | ||
9280 | case SK_PARAM: | |
9281 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9282 | ret->paramno = s->info->paramno; | |
28bf4b0b | 9283 | llassert (ret->paramno >= -1); |
616915dd | 9284 | break; |
9285 | ||
9286 | case SK_ARRAYFETCH: | |
9287 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9288 | ret->arrayfetch = (ainfo) dmalloc (sizeof (*ret->arrayfetch)); | |
9289 | ret->arrayfetch->indknown = s->info->arrayfetch->indknown; | |
9290 | ret->arrayfetch->ind = s->info->arrayfetch->ind; | |
9291 | ret->arrayfetch->arr = sRef_saveCopy (s->info->arrayfetch->arr); | |
9292 | break; | |
9293 | ||
9294 | case SK_FIELD: | |
9295 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9296 | ret->field = (fldinfo) dmalloc (sizeof (*ret->field)); | |
9297 | ret->field->rec = sRef_saveCopy (s->info->field->rec); | |
9298 | ret->field->field = s->info->field->field; | |
9299 | break; | |
9300 | ||
9301 | case SK_OBJECT: | |
9302 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9303 | ret->object = s->info->object; | |
9304 | break; | |
9305 | ||
9306 | case SK_PTR: | |
9307 | case SK_ADR: | |
9308 | case SK_DERIVED: | |
9309 | case SK_EXTERNAL: | |
9310 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9311 | ret->ref = sRef_saveCopy (s->info->ref); | |
9312 | break; | |
9313 | ||
9314 | case SK_CONJ: | |
9315 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9316 | ret->conj = (cjinfo) dmalloc (sizeof (*ret->conj)); | |
9317 | ret->conj->a = sRef_saveCopy (s->info->conj->a); | |
9318 | ret->conj->b = sRef_saveCopy (s->info->conj->b); | |
9319 | break; | |
9320 | case SK_SPECIAL: | |
9321 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9322 | ret->spec = s->info->spec; | |
9323 | break; | |
9324 | case SK_NEW: | |
9325 | case SK_UNCONSTRAINED: | |
9326 | ret = (sinfo) dmalloc (sizeof (*ret)); | |
9327 | ret->fname = s->info->fname; | |
9328 | break; | |
9329 | case SK_CONST: | |
9330 | case SK_TYPE: | |
9331 | case SK_RESULT: | |
9332 | case SK_UNKNOWN: | |
9333 | llassert (s->info == NULL); | |
9334 | ret = NULL; | |
9335 | break; | |
9336 | } | |
9337 | /*@=onlytrans@*/ | |
9338 | return ret; | |
9339 | } | |
9340 | ||
9341 | ||
9342 | static void | |
9343 | sinfo_update (/*@notnull@*/ /*@exposed@*/ sRef res, | |
9344 | /*@notnull@*/ /*@exposed@*/ sRef other) | |
9345 | { | |
9346 | llassert (res->kind == other->kind); | |
9347 | ||
9348 | switch (res->kind) | |
9349 | { | |
9350 | case SK_CVAR: | |
9351 | res->info->cvar->lexlevel = other->info->cvar->lexlevel; | |
9352 | res->info->cvar->index = other->info->cvar->index; | |
9353 | break; | |
9354 | ||
9355 | case SK_PARAM: | |
9356 | res->info->paramno = other->info->paramno; | |
28bf4b0b | 9357 | llassert (res->info->paramno >= -1); |
616915dd | 9358 | break; |
9359 | ||
9360 | case SK_ARRAYFETCH: | |
9361 | res->info->arrayfetch->indknown = other->info->arrayfetch->indknown; | |
9362 | res->info->arrayfetch->ind = other->info->arrayfetch->ind; | |
9363 | res->info->arrayfetch->arr = other->info->arrayfetch->arr; | |
9364 | break; | |
9365 | ||
9366 | case SK_FIELD: | |
9367 | res->info->field->rec = other->info->field->rec; | |
9368 | res->info->field->field = other->info->field->field; | |
9369 | break; | |
9370 | ||
9371 | case SK_OBJECT: | |
9372 | res->info->object = other->info->object; | |
9373 | break; | |
9374 | ||
9375 | case SK_PTR: | |
9376 | case SK_ADR: | |
9377 | case SK_DERIVED: | |
9378 | case SK_EXTERNAL: | |
9379 | res->info->ref = other->info->ref; | |
9380 | break; | |
9381 | ||
9382 | case SK_CONJ: | |
9383 | res->info->conj->a = other->info->conj->a; | |
9384 | res->info->conj->b = other->info->conj->b; | |
9385 | break; | |
9386 | ||
9387 | case SK_SPECIAL: | |
9388 | res->info->spec = other->info->spec; | |
9389 | break; | |
9390 | ||
9391 | case SK_NEW: | |
9392 | case SK_UNCONSTRAINED: | |
9393 | res->info->fname = other->info->fname; | |
9394 | break; | |
9395 | ||
9396 | case SK_CONST: | |
9397 | case SK_TYPE: | |
9398 | case SK_UNKNOWN: | |
9399 | case SK_RESULT: | |
9400 | llassert (res->info == NULL); | |
9401 | break; | |
9402 | } | |
9403 | } | |
9404 | ||
9405 | static void sinfo_free (/*@special@*/ /*@temp@*/ /*@notnull@*/ sRef s) | |
9406 | /*@uses s->kind, s->info@*/ | |
9407 | /*@releases s->info@*/ | |
9408 | { | |
9409 | switch (s->kind) | |
9410 | { | |
9411 | case SK_CVAR: | |
28bf4b0b | 9412 | DPRINTF (("Free sinfo: [%p]", s->info->cvar)); |
616915dd | 9413 | sfree (s->info->cvar); |
9414 | break; | |
9415 | ||
9416 | case SK_PARAM: | |
9417 | break; | |
9418 | ||
9419 | case SK_ARRAYFETCH: | |
28bf4b0b | 9420 | DPRINTF (("Free sinfo: [%p]", s->info->arrayfetch)); |
616915dd | 9421 | sfree (s->info->arrayfetch); |
9422 | break; | |
9423 | ||
9424 | case SK_FIELD: | |
28bf4b0b | 9425 | DPRINTF (("Free sinfo: [%p]", s->info->field)); |
616915dd | 9426 | sfree (s->info->field); |
9427 | break; | |
9428 | ||
9429 | case SK_OBJECT: | |
9430 | break; | |
9431 | ||
9432 | case SK_PTR: | |
9433 | case SK_ADR: | |
9434 | case SK_DERIVED: | |
b73d1009 | 9435 | case SK_EXTERNAL: /* is copy now! */ |
616915dd | 9436 | break; |
9437 | ||
9438 | case SK_CONJ: | |
28bf4b0b | 9439 | DPRINTF (("Free sinfo: [%p]", s->info->conj)); |
616915dd | 9440 | sfree (s->info->conj); |
9441 | break; | |
9442 | ||
9443 | case SK_UNCONSTRAINED: | |
9444 | case SK_SPECIAL: | |
9445 | case SK_CONST: | |
9446 | case SK_NEW: | |
9447 | case SK_TYPE: | |
9448 | case SK_UNKNOWN: | |
9449 | case SK_RESULT: | |
9450 | break; | |
9451 | } | |
9452 | ||
28bf4b0b | 9453 | if (s->info != NULL) { |
9454 | DPRINTF (("Free sinfo: [%p]", s->info)); | |
9455 | } | |
9456 | ||
616915dd | 9457 | sfree (s->info); |
9458 | } | |
9459 | ||
9460 | bool sRef_isNSLocalVar (sRef s) | |
9461 | { | |
9462 | if (sRef_isLocalVar (s)) | |
9463 | { | |
9464 | uentry ue = sRef_getUentry (s); | |
9465 | ||
9466 | return (!uentry_isStatic (ue)); | |
9467 | } | |
9468 | else | |
9469 | { | |
9470 | return FALSE; | |
9471 | } | |
9472 | } | |
9473 | ||
9474 | bool sRef_isLocalVar (sRef s) | |
9475 | { | |
9476 | if (sRef_isValid(s)) | |
9477 | { | |
9478 | return (s->kind == SK_CVAR | |
9479 | && (s->info->cvar->lexlevel > fileScope)); | |
9480 | } | |
9481 | ||
9482 | return FALSE; | |
9483 | } | |
9484 | ||
9485 | bool sRef_isRealLocalVar (sRef s) | |
9486 | { | |
9487 | if (sRef_isValid(s)) | |
9488 | { | |
9489 | if (s->kind == SK_CVAR) | |
9490 | { | |
9491 | if (s->info->cvar->lexlevel == functionScope) | |
9492 | { | |
9493 | uentry ue = sRef_getUentry (s); | |
9494 | ||
9495 | if (uentry_isAnyParam (ue) | |
9496 | || uentry_isRefParam (ue)) | |
9497 | { | |
9498 | return FALSE; | |
9499 | } | |
9500 | else | |
9501 | { | |
9502 | return TRUE; | |
9503 | } | |
9504 | } | |
9505 | else | |
9506 | { | |
9507 | return (s->info->cvar->lexlevel > functionScope); | |
9508 | } | |
9509 | } | |
9510 | } | |
9511 | ||
9512 | return FALSE; | |
9513 | } | |
9514 | ||
9515 | bool sRef_isLocalParamVar (sRef s) | |
9516 | { | |
9517 | if (sRef_isValid(s)) | |
9518 | { | |
9519 | return (s->kind == SK_PARAM | |
9520 | || (s->kind == SK_CVAR | |
9521 | && (s->info->cvar->lexlevel > fileScope))); | |
9522 | } | |
9523 | ||
9524 | return FALSE; | |
9525 | } | |
9526 | ||
9527 | static speckind speckind_fromInt (int i) | |
9528 | { | |
9529 | /*@+enumint@*/ | |
9530 | llassert (i >= SR_NOTHING && i <= SR_SYSTEM); | |
9531 | /*@=enumint@*/ | |
9532 | ||
9533 | return ((speckind) i); | |
9534 | } | |
9535 | ||
28bf4b0b | 9536 | |
abd7f895 | 9537 | static void sRef_updateNullState (/*@notnull@*/ sRef res, /*@notnull@*/ sRef other) |
28bf4b0b | 9538 | /*@modifies res@*/ |
9539 | { | |
9540 | res->nullstate = other->nullstate; | |
9541 | res->nullinfo = stateInfo_update (res->nullinfo, other->nullinfo); | |
60868d40 | 9542 | sRef_resetAliasKind (res); |
28bf4b0b | 9543 | } |
9544 | ||
616915dd | 9545 | void sRef_combineNullState (/*@notnull@*/ sRef res, /*@notnull@*/ sRef other) |
9546 | { | |
28bf4b0b | 9547 | nstate n1 = sRef_getNullState (res); |
9548 | nstate n2 = sRef_getNullState (other); | |
616915dd | 9549 | bool flip = FALSE; |
9550 | nstate nn = n1; | |
9551 | ||
9552 | if (n1 == n2 || n2 == NS_UNKNOWN) | |
9553 | { | |
9554 | ; | |
9555 | } | |
9556 | else | |
9557 | { | |
9558 | /* note: n2 is not unknown or defnull */ | |
9559 | ||
9560 | switch (n1) | |
9561 | { | |
9562 | case NS_ERROR: nn = NS_ERROR; break; | |
9563 | case NS_UNKNOWN: flip = TRUE; nn = n2; break; | |
9564 | case NS_POSNULL: break; | |
9565 | case NS_DEFNULL: nn = NS_POSNULL; break; | |
9566 | case NS_RELNULL: break; | |
9567 | case NS_NOTNULL: | |
9568 | if (n2 == NS_MNOTNULL) | |
9569 | { | |
9570 | ; | |
9571 | } | |
9572 | else | |
9573 | { | |
9574 | flip = TRUE; | |
9575 | nn = NS_POSNULL; | |
9576 | } | |
9577 | break; | |
9578 | case NS_MNOTNULL: | |
9579 | if (n2 == NS_NOTNULL) | |
9580 | { | |
9581 | nn = NS_NOTNULL; | |
9582 | } | |
9583 | else | |
9584 | { | |
9585 | flip = TRUE; | |
9586 | nn = NS_POSNULL; | |
9587 | } | |
9588 | break; | |
9589 | case NS_CONSTNULL: | |
9590 | case NS_ABSNULL: | |
9591 | flip = TRUE; | |
9592 | nn = n2; | |
9593 | } | |
9594 | } | |
9595 | ||
9596 | if (flip) | |
9597 | { | |
28bf4b0b | 9598 | res->nullinfo = stateInfo_update (res->nullinfo, other->nullinfo); |
616915dd | 9599 | } |
9600 | ||
9601 | res->nullstate = nn; | |
60868d40 | 9602 | sRef_resetAliasKind (res); |
616915dd | 9603 | } |
9604 | ||
9605 | cstring sRef_nullMessage (sRef s) | |
9606 | { | |
6483a926 | 9607 | llassert (sRef_isReasonable (s)); |
616915dd | 9608 | |
28bf4b0b | 9609 | switch (sRef_getNullState (s)) |
616915dd | 9610 | { |
9611 | case NS_DEFNULL: | |
9612 | case NS_CONSTNULL: | |
9613 | return (cstring_makeLiteralTemp ("null")); | |
9614 | default: | |
9615 | return (cstring_makeLiteralTemp ("possibly null")); | |
9616 | } | |
9617 | BADEXIT; | |
9618 | } | |
9619 | ||
9620 | /*@observer@*/ cstring sRef_ntMessage (sRef s) | |
9621 | { | |
6483a926 | 9622 | llassert (sRef_isReasonable (s)); |
616915dd | 9623 | |
9624 | switch (s->nullstate) | |
9625 | { | |
9626 | case NS_DEFNULL: | |
9627 | case NS_CONSTNULL: | |
9628 | return (cstring_makeLiteralTemp ("not nullterminated")); | |
9629 | default: | |
9630 | return (cstring_makeLiteralTemp ("possibly non-nullterminated")); | |
9631 | } | |
9632 | BADEXIT; | |
9633 | } | |
9634 | ||
9635 | ||
9636 | ||
9637 | sRef sRef_fixResultType (/*@returned@*/ sRef s, ctype typ, uentry ue) | |
9638 | { | |
9639 | sRef tmp = sRef_undefined; | |
9640 | sRef ret; | |
9641 | ||
6483a926 | 9642 | llassert (sRef_isReasonable (s)); |
616915dd | 9643 | |
9644 | switch (s->kind) | |
9645 | { | |
9646 | case SK_RESULT: | |
9647 | s->type = typ; | |
9648 | ret = s; | |
9649 | break; | |
9650 | case SK_ARRAYFETCH: | |
9651 | { | |
9652 | ctype ct; | |
9653 | tmp = sRef_fixResultType (s->info->arrayfetch->arr, typ, ue); | |
9654 | ||
9655 | ct = ctype_realType (sRef_getType (tmp)); | |
9656 | ||
9657 | ||
9658 | if (ctype_isKnown (ct)) | |
9659 | { | |
9660 | if (ctype_isAP (ct)) | |
9661 | { | |
9662 | ; | |
9663 | } | |
9664 | else | |
9665 | { | |
9666 | voptgenerror | |
9667 | (FLG_TYPE, | |
9668 | message | |
9669 | ("Special clause indexes non-array (%t): *%q", | |
9670 | ct, sRef_unparse (s->info->arrayfetch->arr)), | |
9671 | uentry_whereLast (ue)); | |
9672 | } | |
9673 | } | |
9674 | ||
9675 | tmp = sRef_fixResultType (s->info->arrayfetch->arr, typ, ue); | |
9676 | ||
9677 | if (s->info->arrayfetch->indknown) | |
9678 | { | |
9679 | ret = sRef_makeArrayFetchKnown (tmp, s->info->arrayfetch->ind); | |
9680 | } | |
9681 | else | |
9682 | { | |
9683 | ret = sRef_makeArrayFetch (tmp); | |
9684 | } | |
9685 | } | |
9686 | break; | |
9687 | case SK_FIELD: | |
9688 | { | |
9689 | sRef rec = sRef_fixResultType (s->info->field->rec, typ, ue); | |
9690 | ctype ct = ctype_realType (sRef_getType (rec)); | |
9691 | ||
9692 | if (ctype_isKnown (ct)) | |
9693 | { | |
9694 | if (ctype_isSU (ct)) | |
9695 | { | |
9696 | if (uentry_isValid (uentryList_lookupField (ctype_getFields (ct), | |
9697 | s->info->field->field))) | |
9698 | { | |
9699 | ; | |
9700 | } | |
9701 | else | |
9702 | { | |
9703 | voptgenerror | |
9704 | (FLG_TYPE, | |
9705 | message | |
9706 | ("Special clause accesses non-existent field of result: %q.%s", | |
9707 | sRef_unparse (rec), s->info->field->field), | |
9708 | uentry_whereLast (ue)); | |
9709 | } | |
9710 | } | |
9711 | else | |
9712 | { | |
9713 | voptgenerror | |
9714 | (FLG_TYPE, | |
9715 | message | |
9716 | ("Special clause accesses field of non-struct or union result (%t): %q.%s", | |
9717 | ct, sRef_unparse (rec), s->info->field->field), | |
9718 | uentry_whereLast (ue)); | |
9719 | } | |
9720 | } | |
9721 | ||
9722 | ret = sRef_makeField (tmp, s->info->field->field); | |
9723 | break; | |
9724 | } | |
9725 | case SK_PTR: | |
9726 | { | |
9727 | ctype ct; | |
9728 | tmp = sRef_fixResultType (s->info->ref, typ, ue); | |
9729 | ||
9730 | ct = ctype_realType (sRef_getType (tmp)); | |
9731 | ||
9732 | if (ctype_isKnown (ct)) | |
9733 | { | |
9734 | if (ctype_isAP (ct)) | |
9735 | { | |
9736 | ; | |
9737 | } | |
9738 | else | |
9739 | { | |
9740 | voptgenerror | |
9741 | (FLG_TYPE, | |
9742 | message | |
9743 | ("Special clause dereferences non-pointer (%t): *%q", | |
9744 | ct, sRef_unparse (s->info->ref)), | |
9745 | uentry_whereLast (ue)); | |
9746 | } | |
9747 | } | |
9748 | ||
9749 | ret = sRef_makePointer (tmp); | |
9750 | break; | |
9751 | } | |
9752 | case SK_ADR: | |
9753 | voptgenerror | |
9754 | (FLG_TYPE, | |
9755 | message | |
9756 | ("Special clause uses & operator (not allowed): &%q", sRef_unparse (s->info->ref)), | |
9757 | uentry_whereLast (ue)); | |
9758 | ret = s; | |
9759 | break; | |
9760 | BADDEFAULT; | |
9761 | } | |
9762 | ||
9763 | return ret; | |
9764 | } | |
9765 | ||
9766 | bool sRef_isOnly (sRef s) | |
9767 | { | |
9768 | return (sRef_isValid(s) && alkind_isOnly (s->aliaskind)); | |
9769 | } | |
9770 | ||
9771 | bool sRef_isDependent (sRef s) | |
9772 | { | |
9773 | return (sRef_isValid(s) && alkind_isDependent (s->aliaskind)); | |
9774 | } | |
9775 | ||
9776 | bool sRef_isOwned (sRef s) | |
9777 | { | |
6483a926 | 9778 | return (sRef_isReasonable (s) && (s->aliaskind == AK_OWNED)); |
616915dd | 9779 | } |
9780 | ||
9781 | bool sRef_isKeep (sRef s) | |
9782 | { | |
6483a926 | 9783 | return (sRef_isReasonable (s) && (s->aliaskind == AK_KEEP)); |
616915dd | 9784 | } |
9785 | ||
9786 | bool sRef_isTemp (sRef s) | |
9787 | { | |
6483a926 | 9788 | return (sRef_isReasonable (s) && alkind_isTemp (s->aliaskind)); |
616915dd | 9789 | } |
9790 | ||
9791 | bool sRef_isLocalState (sRef s) | |
9792 | { | |
6483a926 | 9793 | return (sRef_isReasonable (s) && (s->aliaskind == AK_LOCAL)); |
616915dd | 9794 | } |
9795 | ||
9796 | bool sRef_isUnique (sRef s) | |
9797 | { | |
6483a926 | 9798 | return (sRef_isReasonable (s) && (s->aliaskind == AK_UNIQUE)); |
616915dd | 9799 | } |
9800 | ||
9801 | bool sRef_isShared (sRef s) | |
9802 | { | |
6483a926 | 9803 | return (sRef_isReasonable (s) && (s->aliaskind == AK_SHARED)); |
616915dd | 9804 | } |
9805 | ||
9806 | bool sRef_isExposed (sRef s) | |
9807 | { | |
6483a926 | 9808 | return (sRef_isReasonable (s) && (s->expkind == XO_EXPOSED)); |
616915dd | 9809 | } |
9810 | ||
9811 | bool sRef_isObserver (sRef s) | |
9812 | { | |
6483a926 | 9813 | return (sRef_isReasonable (s) && (s->expkind == XO_OBSERVER)); |
616915dd | 9814 | } |
9815 | ||
9816 | bool sRef_isFresh (sRef s) | |
9817 | { | |
6483a926 | 9818 | return (sRef_isReasonable (s) && (s->aliaskind == AK_FRESH)); |
616915dd | 9819 | } |
9820 | ||
9821 | bool sRef_isDefinitelyNull (sRef s) | |
9822 | { | |
6483a926 | 9823 | return (sRef_isReasonable (s) && (sRef_getNullState (s) == NS_DEFNULL |
28bf4b0b | 9824 | || sRef_getNullState (s) == NS_CONSTNULL)); |
616915dd | 9825 | } |
9826 | ||
9827 | bool sRef_isAllocated (sRef s) | |
9828 | { | |
6483a926 | 9829 | return (sRef_isReasonable (s) && (s->defstate == SS_ALLOCATED)); |
616915dd | 9830 | } |
9831 | ||
9832 | bool sRef_isStack (sRef s) | |
9833 | { | |
6483a926 | 9834 | return (sRef_isReasonable (s) && (s->aliaskind == AK_STACK)); |
616915dd | 9835 | } |
9836 | ||
28bf4b0b | 9837 | bool sRef_isNotNull (sRef s) |
9838 | { | |
9839 | return (sRef_isValid(s) && (sRef_getNullState (s) == NS_MNOTNULL | |
9840 | || sRef_getNullState (s) == NS_NOTNULL)); | |
9841 | } | |
9842 | ||
9843 | alkind sRef_getAliasKind (sRef s) | |
9844 | { | |
9845 | if (sRef_isValid(s)) { | |
9846 | llassert (alkind_isValid (s->aliaskind)); | |
9847 | return s->aliaskind; | |
9848 | } | |
9849 | ||
9850 | return AK_ERROR; | |
9851 | } | |
9852 | ||
9853 | nstate sRef_getNullState (sRef s) | |
9854 | { | |
6483a926 | 9855 | if (sRef_isReasonable (s)) { |
28bf4b0b | 9856 | llassert (nstate_isValid (s->nullstate)); |
9857 | return s->nullstate; | |
9858 | } | |
9859 | ||
9860 | return NS_UNKNOWN; | |
9861 | } | |
9862 | ||
9863 | void sRef_reflectAnnotation (sRef s, annotationInfo a, fileloc loc) | |
9864 | { | |
6483a926 | 9865 | if (sRef_isReasonable (s)) |
28bf4b0b | 9866 | { |
9867 | if (!valueTable_isDefined (s->state)) | |
9868 | { | |
9869 | s->state = valueTable_create (1); | |
16c024b5 | 9870 | valueTable_insert |
9871 | (s->state, | |
9872 | cstring_copy (metaStateInfo_getName (annotationInfo_getState (a))), | |
9873 | stateValue_create (annotationInfo_getValue (a), | |
9874 | stateInfo_makeLoc (loc, SA_DECLARED))); | |
28bf4b0b | 9875 | } |
9876 | else | |
9877 | { | |
9878 | DPRINTF (("reflect loc: %s", fileloc_unparse (loc))); | |
9879 | valueTable_update | |
9880 | (s->state, | |
9881 | metaStateInfo_getName (annotationInfo_getState (a)), | |
16c024b5 | 9882 | stateValue_create (annotationInfo_getValue (a), |
9883 | stateInfo_makeLoc (loc, SA_DECLARED))); | |
9884 | ||
28bf4b0b | 9885 | DPRINTF (("sref: %s", sRef_unparse (s))); |
9886 | DPRINTF (("sref: %s", sRef_unparseFull (s))); | |
9887 | } | |
9888 | } | |
9889 | } | |
9890 | ||
9891 | void sRef_setMetaStateValueComplete (sRef s, cstring key, int value, fileloc loc) | |
9892 | { | |
9893 | sRefSet aliases = usymtab_allAliases (s); | |
9894 | ||
9895 | sRef_setMetaStateValue (s, key, value, loc); | |
9896 | ||
9897 | sRefSet_realElements (aliases, current) | |
9898 | { | |
6483a926 | 9899 | if (sRef_isReasonable (current)) |
28bf4b0b | 9900 | { |
9901 | current = sRef_updateSref (current); | |
9902 | sRef_setMetaStateValue (current, key, value, loc); | |
9903 | } | |
9904 | } end_sRefSet_realElements ; | |
9905 | ||
9906 | sRefSet_free (aliases); | |
9907 | } | |
9908 | ||
9909 | void sRef_setMetaStateValue (sRef s, cstring key, int value, fileloc loc) | |
9910 | { | |
9911 | sRef_checkMutable (s); | |
9912 | ||
6483a926 | 9913 | if (sRef_isReasonable (s)) |
28bf4b0b | 9914 | { |
9915 | if (!valueTable_isDefined (s->state)) | |
9916 | { | |
9917 | DPRINTF (("inserting state: %s: %s %d", sRef_unparse (s), key, value)); | |
9918 | s->state = valueTable_create (1); | |
9919 | valueTable_insert (s->state, cstring_copy (key), | |
16c024b5 | 9920 | stateValue_create (value, |
9921 | stateInfo_makeLoc (loc, SA_CHANGED))); | |
28bf4b0b | 9922 | } |
9923 | else | |
9924 | { | |
9925 | DPRINTF (("Updating state: %s: %s %d / %s", sRef_unparse (s), key, value, | |
9926 | fileloc_unparse (loc))); | |
2c88d156 | 9927 | if (valueTable_contains (s->state, key)) |
9928 | { | |
9929 | valueTable_update | |
16c024b5 | 9930 | (s->state, key, stateValue_create (value, |
9931 | stateInfo_makeLoc (loc, SA_CHANGED))); | |
2c88d156 | 9932 | } |
9933 | else | |
9934 | { | |
9935 | valueTable_insert | |
16c024b5 | 9936 | (s->state, cstring_copy (key), |
9937 | stateValue_create (value, stateInfo_makeLoc (loc, SA_CHANGED))); | |
2c88d156 | 9938 | } |
9939 | ||
28bf4b0b | 9940 | DPRINTF (("After: %s", sRef_unparseFull (s))); |
9941 | } | |
9942 | } | |
9943 | } | |
9944 | ||
9945 | bool sRef_checkMetaStateValue (sRef s, cstring key, int value) | |
9946 | { | |
6483a926 | 9947 | if (sRef_isReasonable (s)) |
28bf4b0b | 9948 | { |
9949 | if (valueTable_isDefined (s->state)) | |
9950 | { | |
9951 | stateValue val; | |
9952 | ||
9953 | DPRINTF (("check state: %s: %s %d", sRef_unparse (s), key, value)); | |
9954 | ||
9955 | val = valueTable_lookup (s->state, key); | |
9956 | llassert (stateValue_isDefined (val)); | |
9957 | return (stateValue_isError (val) | |
9958 | || stateValue_getValue (val) == value); | |
9959 | } | |
9960 | else | |
9961 | { | |
9962 | return TRUE; | |
9963 | } | |
9964 | } | |
9965 | else | |
9966 | { | |
9967 | return TRUE; | |
9968 | } | |
9969 | } | |
9970 | ||
9971 | /*@observer@*/ stateValue sRef_getMetaStateValue (sRef s, cstring key) | |
9972 | { | |
6483a926 | 9973 | if (sRef_isReasonable (s)) |
28bf4b0b | 9974 | { |
9975 | if (valueTable_isDefined (s->state)) | |
9976 | { | |
9977 | stateValue val; | |
9978 | ||
9979 | val = valueTable_lookup (s->state, key); | |
2c88d156 | 9980 | /* Okay if its not defined, just returns stateValue_undefined */ |
28bf4b0b | 9981 | return val; |
9982 | } | |
9983 | else | |
9984 | { | |
9985 | return stateValue_undefined; | |
9986 | } | |
9987 | } | |
9988 | else | |
9989 | { | |
9990 | return stateValue_undefined; | |
9991 | } | |
9992 | } | |
9993 | ||
9994 | /*@observer@*/ valueTable sRef_getValueTable (sRef s) | |
9995 | { | |
9996 | DPRINTF (("Get value table: %s", sRef_unparse (s))); | |
9997 | ||
6483a926 | 9998 | if (sRef_isReasonable (s)) |
28bf4b0b | 9999 | { |
6483a926 | 10000 | llassert (sRef_isReasonable (s)); |
28bf4b0b | 10001 | DPRINTF (("Value table: %s", valueTable_unparse (s->state))); |
10002 | return s->state; | |
10003 | } | |
10004 | else | |
10005 | { | |
10006 | DPRINTF (("No value table!")); | |
10007 | return valueTable_undefined; | |
10008 | } | |
10009 | } | |
10010 | ||
10011 | bool sRef_makeStateSpecial (sRef s) | |
10012 | { | |
10013 | /* | |
10014 | ** Default defined state can be made special. | |
10015 | */ | |
10016 | ||
b73d1009 | 10017 | llassert (sRef_isReasonable (s)); |
28bf4b0b | 10018 | |
10019 | if (s->defstate == SS_UNKNOWN || s->defstate == SS_DEFINED || s->defstate == SS_SPECIAL) | |
10020 | { | |
ccf0a4a8 | 10021 | /* s->aliaskind = AK_IMPTEMP; */ /* evans 2001-07-23 shouldn't effect alias state */ |
28bf4b0b | 10022 | s->defstate = SS_SPECIAL; |
10023 | DPRINTF (("Made special: %s", sRef_unparseFull (s))); | |
10024 | return TRUE; | |
10025 | } | |
10026 | else | |
10027 | { | |
ccf0a4a8 | 10028 | /* s->aliaskind = AK_IMPTEMP; */ |
28bf4b0b | 10029 | s->defstate = SS_SPECIAL; |
10030 | return FALSE; | |
10031 | } | |
10032 | } | |
10033 | ||
10034 | void sRef_markImmutable (sRef s) | |
616915dd | 10035 | { |
6483a926 | 10036 | if (sRef_isReasonable (s)) |
28bf4b0b | 10037 | { |
10038 | DPRINTF (("Mark immutable: %s", sRef_unparseFull (s))); | |
10039 | s->immut = TRUE; | |
10040 | } | |
10041 | } | |
10042 | ||
10043 | bool sRef_definitelyNullContext (sRef s) | |
10044 | { | |
10045 | return (sRef_definitelyNull (s) | |
10046 | || usymtab_isDefinitelyNullDeep (s)); | |
10047 | } | |
10048 | ||
10049 | bool sRef_definitelyNullAltContext (sRef s) | |
10050 | { | |
10051 | return (sRef_definitelyNull (s) | |
10052 | || usymtab_isAltDefinitelyNullDeep (s)); | |
616915dd | 10053 | } |
10054 | ||
28bf4b0b | 10055 | |
616915dd | 10056 | /* start modifications */ |
28bf4b0b | 10057 | struct s_bbufinfo sRef_getNullTerminatedState (sRef p_s) { |
10058 | struct s_bbufinfo BUFSTATE_UNKNOWN; | |
616915dd | 10059 | BUFSTATE_UNKNOWN.bufstate = BB_NOTNULLTERMINATED; |
10060 | BUFSTATE_UNKNOWN.size = 0; | |
10061 | BUFSTATE_UNKNOWN.len = 0; | |
10062 | ||
10063 | if (sRef_isValid(p_s)) | |
10064 | return p_s->bufinfo; | |
10065 | return BUFSTATE_UNKNOWN; | |
10066 | } | |
10067 | ||
10068 | void sRef_setNullTerminatedState(sRef p_s) { | |
6483a926 | 10069 | if(sRef_isReasonable (p_s)) { |
616915dd | 10070 | p_s->bufinfo.bufstate = BB_NULLTERMINATED; |
10071 | } else { | |
10072 | llfatalbug( message("sRef_setNT passed a invalid sRef\n")); | |
10073 | } | |
10074 | } | |
10075 | ||
10076 | ||
10077 | void sRef_setPossiblyNullTerminatedState(sRef p_s) { | |
6483a926 | 10078 | if( sRef_isReasonable (p_s)) { |
616915dd | 10079 | p_s->bufinfo.bufstate = BB_POSSIBLYNULLTERMINATED; |
10080 | } else { | |
10081 | llfatalbug( message("sRef_setPossNT passed a invalid sRef\n")); | |
10082 | } | |
10083 | } | |
10084 | ||
10085 | void sRef_setNotNullTerminatedState(sRef p_s) { | |
6483a926 | 10086 | if( sRef_isReasonable (p_s)) { |
616915dd | 10087 | p_s->bufinfo.bufstate = BB_NOTNULLTERMINATED; |
10088 | } else { | |
10089 | llfatalbug( message("sRef_unsetNT passed a invalid sRef\n")); | |
10090 | } | |
10091 | } | |
10092 | ||
10093 | void sRef_setLen(sRef p_s, int len) { | |
02b84d4b | 10094 | if (sRef_isReasonable (p_s) && sRef_isNullTerminated(p_s)) |
10095 | { | |
10096 | p_s->bufinfo.len = len; | |
10097 | } | |
10098 | else | |
10099 | { | |
10100 | llfatalbug( message("sRef_setLen passed an invalid sRef\n")); | |
10101 | } | |
616915dd | 10102 | } |
10103 | ||
10104 | ||
10105 | void sRef_setSize(sRef p_s, int size) { | |
02b84d4b | 10106 | if( sRef_isValid(p_s)) |
10107 | { | |
616915dd | 10108 | p_s->bufinfo.size = size; |
02b84d4b | 10109 | } |
10110 | else | |
10111 | { | |
10112 | llfatalbug( message("sRef_setSize passed a invalid sRef\n")); | |
10113 | } | |
616915dd | 10114 | } |
10115 | ||
10116 | void sRef_resetLen(sRef p_s) { | |
02b84d4b | 10117 | if (sRef_isReasonable (p_s)) |
10118 | { | |
10119 | p_s->bufinfo.len = 0; | |
10120 | } | |
10121 | else | |
10122 | { | |
10123 | llfatalbug (message ("sRef_setLen passed an invalid sRef\n")); | |
10124 | } | |
616915dd | 10125 | } |
10126 | ||
10127 | /*drl7x 11/28/2000 */ | |
10128 | ||
dc92450f | 10129 | bool sRef_isFixedArray (sRef p_s) /*@*/ { |
616915dd | 10130 | ctype c; |
10131 | c = sRef_getType (p_s); | |
10132 | return ( ctype_isFixedArray (c) ); | |
10133 | } | |
10134 | ||
37ae0b5e | 10135 | size_t sRef_getArraySize (sRef p_s) /*@*/ |
10136 | { | |
616915dd | 10137 | ctype c; |
10138 | llassert (sRef_isFixedArray(p_s) ); | |
470b7798 | 10139 | DPRINTF (( message ("sRef_getArraySize getting array size for %s", sRef_unparse(p_s) ) )); |
10140 | ||
616915dd | 10141 | c = sRef_getType (p_s); |
37ae0b5e | 10142 | return (ctype_getArraySize (c)); |
616915dd | 10143 | } |
10144 | ||
b9904f57 | 10145 | void sRef_setValue (sRef s, multiVal val) |
10146 | { | |
b87215ab | 10147 | if (!sRef_isReasonable (s)) |
10148 | { | |
10149 | llcontbuglit ("Unreasonable sRef"); | |
10150 | llcontbug (message ("sRef: %s", sRef_unparse (s))); | |
10151 | return; | |
10152 | } | |
10153 | ||
b9904f57 | 10154 | multiVal_free (s->val); |
10155 | s->val = val; | |
10156 | } | |
10157 | ||
10158 | bool sRef_hasValue (sRef s) | |
10159 | { | |
6483a926 | 10160 | return (sRef_isReasonable (s) |
b9904f57 | 10161 | && multiVal_isDefined (s->val)); |
10162 | } | |
10163 | ||
10164 | multiVal sRef_getValue (sRef s) | |
10165 | { | |
6483a926 | 10166 | if (sRef_isReasonable (s)) |
b9904f57 | 10167 | { |
10168 | return s->val; | |
10169 | } | |
10170 | ||
10171 | return multiVal_undefined; | |
10172 | } |