2 ** Copyright (C) University of Virginia, Massachusetts Institue of Technology 1994-2003.
3 ** See ../LICENSE for license information.
16 ** ctype typ --- type of expression
23 ** } *val --- value, if known. if unknown, val = (_val *)0
25 ** storeRef sref --- storage referred to by expression, of storeRef_null
27 ** cstring etext --- to get nice error messages, punt for now!
30 /* in exprNode_type: typedef struct _exprNode *exprNode; */
34 XPR_PARENS, XPR_ASSIGN, XPR_CALL, XPR_EMPTY, XPR_VAR,
35 XPR_OP, XPR_POSTOP, XPR_PREOP, XPR_SIZEOFT, XPR_SIZEOF, XPR_ALIGNOFT, XPR_ALIGNOF,
36 XPR_OFFSETOF, XPR_CAST, XPR_FETCH, XPR_VAARG, XPR_ITER,
37 XPR_FOR, XPR_FORPRED, XPR_GOTO, XPR_CONTINUE, XPR_BREAK,
38 XPR_RETURN, XPR_NULLRETURN, XPR_COMMA, XPR_COND, XPR_IF, XPR_IFELSE,
39 XPR_DOWHILE, XPR_WHILE, XPR_STMT, XPR_STMTLIST, XPR_SWITCH,
40 XPR_INIT, XPR_FACCESS, XPR_ARROW, XPR_CONST, XPR_STRINGLITERAL,
41 XPR_NUMLIT, XPR_BODY, XPR_NODE, XPR_ITERCALL, XPR_TOK,
42 XPR_WHILEPRED, XPR_CASE, XPR_FTCASE, XPR_DEFAULT, XPR_FTDEFAULT,
43 XPR_BLOCK, XPR_INITBLOCK,
50 /*@only@*/ cstringList field;
55 /*@only@*/ exprNode a;
56 /*@only@*/ exprNode b;
61 /*@only@*/ exprNode pred;
62 /*@only@*/ exprNode tbranch;
63 /*@only@*/ exprNode fbranch;
68 /*@dependent@*/ /*@observer@*/ uentry sname;
69 /*@only@*/ exprNodeList args;
70 /*@only@*/ exprNode body;
71 /*@dependent@*/ /*@observer@*/ uentry ename;
76 /*@only@*/ exprNode fcn;
77 /*@only@*/ exprNodeList args;
82 /*@dependent@*/ /*@exposed@*/ uentry iter;
83 /*@only@*/ exprNodeList args;
88 /*@only@*/ exprNode a;
89 /*@only@*/ exprNode b;
95 /*@only@*/ exprNode rec;
96 /*@only@*/ cstring field;
101 /*@only@*/ exprNode a;
107 /*@only@*/ exprNode exp;
114 /*@only@*/ exprNode exp;
118 typedef /*@null@*/ union
123 qtype qt; /* sizeof(type) */
124 /* use for any 2-operator (comma, arrayFetch, case, stmt) */
126 exprOp op; /* pair + operator */
131 exprIterCall itercall;
135 exprTriple triple; /* ifelse, ternary op, for pred */
139 /*@constant null exprData exprData_undefined; @*/
140 # define exprData_undefined ((exprData) NULL)
144 bool isJumpPoint BOOLBITS; /* expr can be reached non-sequentially */
145 bool canBreak BOOLBITS; /* expr can break (has break, continue) */
146 bool mustBreak BOOLBITS;
152 /*@exposed@*/ sRef sref;
153 sRefSet uses; /* sRef's used by this expression */
154 sRefSet sets; /* sRef's set by this expression */
155 sRefSet msets; /* sRef's possibly set (implicit out params, etc.) */
161 /*@relnull@*/ exprData edata;
163 /*@notnull@*/ constraintList requiresConstraints;
164 /*@notnull@*/ constraintList ensuresConstraints;
167 ** These two are used only for boolean expressions,
168 ** they store the ensures constraints for the true and false cases
171 /*@notnull@*/ constraintList trueEnsuresConstraints;
172 /*@notnull@*/ constraintList falseEnsuresConstraints;
175 /*@constant null exprNode exprNode_undefined; @*/
176 # define exprNode_undefined ((exprNode)NULL)
178 extern /*@falsewhennull@*/ bool exprNode_isDefined (exprNode p_e) /*@*/ ;
179 extern /*@unused@*/ /*@nullwhentrue@*/ bool exprNode_isUndefined (exprNode p_e) /*@*/ ;
180 extern /*@nullwhentrue@*/ bool exprNode_isError (exprNode p_e) /*@*/ ;
182 # define exprNode_isDefined(e) ((e) != exprNode_undefined)
183 # define exprNode_isUndefined(e) ((e) == exprNode_undefined)
184 # define exprNode_isError(e) ((e) == exprNode_undefined)
186 extern /*@dependent@*/ /*@exposed@*/ guardSet
187 exprNode_getGuards (/*@sef@*/ exprNode p_e) /*@*/ ;
188 # define exprNode_getGuards(e) \
189 (exprNode_isDefined(e) ? (e)->guards : guardSet_undefined)
191 extern ctype exprNode_getType (/*@sef@*/ exprNode p_e) /*@*/ ;
192 # define exprNode_getType(e) \
193 (exprNode_isDefined(e) ? (e)->typ : ctype_unknown)
195 extern /*@unused@*/ /*@falsewhennull@*/ bool exprNode_isInParens (/*@sef@*/ exprNode p_e) /*@*/ ;
196 # define exprNode_isInParens(e) \
197 (exprNode_isDefined(e) && (e)->kind == XPR_PARENS)
199 extern bool exprNode_isStringLiteral (/*@sef@*/ exprNode p_e) /*@*/ ;
200 # define exprNode_isStringLiteral(e) \
201 (exprNode_isDefined(e) && (e)->kind == XPR_STRINGLITERAL)
203 extern /*@unused@*/ bool exprNode_knownIntValue (/*@sef@*/ exprNode p_e) /*@*/ ;
204 # define exprNode_knownIntValue(e) \
205 (exprNode_isDefined(e) && multiVal_isInt (exprNode_getValue (e)))
207 extern /*@unused@*/ bool exprNode_knownStringValue (/*@sef@*/ exprNode p_e) /*@*/ ;
208 # define exprNode_knownStringValue(e) \
209 (exprNode_isDefined(e) && multiVal_isString (exprNode_getValue (e)))
211 extern bool exprNode_hasValue (/*@sef@*/ exprNode p_e) /*@*/ ;
212 # define exprNode_hasValue(e) \
213 (exprNode_isDefined(e) && multiVal_isDefined (exprNode_getValue (e)))
215 extern /*@exposed@*/ multiVal exprNode_getValue (exprNode p_e) /*@*/ ;
216 extern long exprNode_getLongValue (exprNode p_e) /*@*/ ;
218 extern /*@observer@*/ cstring exprNode_unparseFirst (exprNode p_e) /*@*/ ;
219 extern void exprNode_revealState (exprNode p_e) /*@modifies g_messagestream@*/ ;
221 extern /*@observer@*/ guardSet exprNode_getForGuards (exprNode p_pred) /*@*/ ;
222 extern bool exprNode_loopMustExec (exprNode p_forPred) /*@*/ ;
224 extern bool exprNode_isNullValue (exprNode p_e) /*@*/ ;
225 extern /*@exposed@*/ sRef exprNode_getSref (exprNode p_e) /*@*/ ;
226 extern /*@exposed@*/ uentry exprNode_getUentry (exprNode p_e)
227 /*@globals internalState@*/ ;
228 extern void exprNode_produceGuards (exprNode p_pred) /*@modifies p_pred@*/ ;
230 extern /*@observer@*/ fileloc exprNode_loc (exprNode p_e) /*@*/ ;
231 extern /*@observer@*/ fileloc exprNode_getLoc (exprNode p_e) /*@*/ ;
232 # define exprNode_getLoc exprNode_loc
235 exprNode_charLiteral (char p_c, cstring p_text, /*@only@*/ fileloc p_loc) /*@*/ ;
236 extern /*@observer@*/ exprNode exprNode_makeMustExit (void) /*@*/ ;
238 exprNode_cond (/*@keep@*/ exprNode p_pred, /*@keep@*/ exprNode p_ifclause,
239 /*@keep@*/ exprNode p_elseclause) /*@*/ ;
242 exprNode_condIfOmit (/*@keep@*/ exprNode p_pred,
243 /*@keep@*/ exprNode p_elseclause) /*@*/ ;
245 extern exprNode exprNode_makeError(void) /*@*/ ;
247 extern exprNode exprNode_makeInitBlock (lltok p_brace, /*@only@*/ exprNodeList p_inits) /*@*/ ;
249 extern exprNode exprNode_functionCall (/*@only@*/ exprNode p_f,
250 /*@only@*/ exprNodeList p_args) /*@*/ ;
251 extern /*@notnull@*/ exprNode
252 exprNode_fromIdentifier (/*@observer@*/ uentry p_c) /*@globals internalState@*/ ;
253 extern exprNode exprNode_fromUIO (cstring p_c) /*@globals internalState@*/ ;
254 extern exprNode exprNode_fieldAccess (/*@only@*/ exprNode p_s,
255 /*@only@*/ lltok p_dot,
256 /*@only@*/ cstring p_f) /*@*/ ;
258 extern exprNode exprNode_arrowAccess (/*@only@*/ exprNode p_s,
259 /*@only@*/ lltok p_arrow,
260 /*@only@*/ cstring p_f) /*@*/ ;
262 extern exprNode exprNode_postOp (/*@only@*/ exprNode p_e, /*@only@*/ lltok p_op)
264 extern exprNode exprNode_preOp (/*@only@*/ exprNode p_e, /*@only@*/ lltok p_op) /*@*/ ;
265 extern exprNode exprNode_addParens (/*@only@*/ lltok p_lpar, /*@only@*/ exprNode p_e) /*@*/ ;
266 extern exprNode exprNode_offsetof (/*@only@*/ qtype p_qt, /*@only@*/ cstringList p_s) /*@*/ ;
267 extern exprNode exprNode_sizeofType (/*@only@*/ qtype p_qt) /*@*/ ;
268 extern exprNode exprNode_sizeofExpr (/*@only@*/ exprNode p_e) /*@*/ ;
269 extern exprNode exprNode_alignofType (/*@only@*/ qtype p_qt) /*@*/ ;
270 extern exprNode exprNode_alignofExpr (/*@only@*/ exprNode p_e) /*@*/ ;
272 exprNode_op (/*@only@*/ exprNode p_e1, /*@keep@*/ exprNode p_e2, /*@only@*/ lltok p_op) /*@*/ ;
274 exprNode_assign (/*@only@*/ exprNode p_e1, /*@only@*/ exprNode p_e2, /*@only@*/ lltok p_op) ;
276 exprNode_arrayFetch (/*@only@*/ exprNode p_e1, /*@only@*/ exprNode p_e2)
277 /*@modifies p_e1, p_e2@*/ ;
279 extern void exprNode_free (/*@only@*/ exprNode p_e) ;
281 exprNode_vaArg (/*@only@*/ lltok p_tok, /*@only@*/ exprNode p_arg, /*@only@*/ qtype p_qt)
282 /*@globals internalState@*/ ;
284 extern bool exprNode_isMultiStatement (exprNode p_e) /*@*/ ;
287 ** Has surrounding quotes.
290 extern /*@only@*/ /*@notnull@*/ exprNode
291 exprNode_stringLiteral (/*@only@*/ cstring p_t, /*@only@*/ fileloc p_loc) /*@*/ ;
293 extern /*@only@*/ /*@notnull@*/ exprNode
294 exprNode_wideStringLiteral (/*@only@*/ cstring p_t, /*@only@*/ fileloc p_loc) /*@*/ ;
297 ** No surrounding quotes.
300 extern /*@notnull@*/ exprNode
301 exprNode_rawStringLiteral (/*@only@*/ cstring p_t, /*@only@*/ fileloc p_loc) /*@*/ ;
303 extern exprNode exprNode_comma (/*@only@*/ exprNode p_e1, /*@only@*/ exprNode p_e2) /*@*/ ;
304 extern exprNode exprNode_labelMarker (/*@only@*/ cstring p_label);
306 exprNode_notReached (/*@returned@*/ exprNode p_stmt);
309 exprNode exprNode_caseMarker (/*@only@*/ exprNode p_test, bool p_fallThrough) /*@*/ ;
311 extern exprNode exprNode_concat (/*@only@*/ exprNode p_e1, /*@only@*/ exprNode p_e2);
312 extern /*@notnull@*/ exprNode exprNode_createTok (/*@only@*/ lltok p_t) /*@*/ ;
313 extern exprNode exprNode_statement (/*@only@*/ exprNode p_e, /*@only@*/ lltok p_t);
314 extern exprNode exprNode_makeBlock (/*@only@*/ exprNode p_e);
315 extern exprNode exprNode_compoundStatementExpression (/*@only@*/ lltok p_tlparen, /*@only@*/ exprNode p_e) ;
317 extern void exprNode_checkIfPred (exprNode p_pred) /*@modifies g_warningstream@*/ ;
319 extern exprNode exprNode_if (/*@only@*/ exprNode p_pred, /*@only@*/ exprNode p_tclause);
321 exprNode_ifelse (/*@only@*/ exprNode p_pred, /*@only@*/ exprNode p_tclause,
322 /*@only@*/ exprNode p_eclause);
323 extern exprNode exprNode_switch (/*@only@*/ exprNode p_e, /*@only@*/ exprNode p_s);
324 extern exprNode exprNode_while (/*@keep@*/ exprNode p_t, /*@keep@*/ exprNode p_b);
325 extern exprNode exprNode_doWhile (/*@only@*/ exprNode p_b, /*@only@*/ exprNode p_t);
326 extern /*@notnull@*/ /*@only@*/ exprNode exprNode_goto (/*@only@*/ cstring p_label);
327 extern exprNode exprNode_continue (/*@only@*/ lltok p_l, int p_qcontinue);
328 extern exprNode exprNode_break (/*@only@*/ lltok p_l, int p_bqual);
329 extern exprNode exprNode_nullReturn (/*@only@*/ lltok p_t);
330 extern exprNode exprNode_return (/*@only@*/ exprNode p_e);
331 extern /*@dependent@*/ /*@observer@*/ cstring
332 exprNode_unparse (/*@temp@*/ exprNode p_e) /*@*/ ;
334 extern /*@falsewhennull@*/ bool exprNode_isBlock (exprNode p_e) /*@*/ ;
335 extern /*@falsewhennull@*/ bool exprNode_isCharLiteral (exprNode p_e) /*@*/ ;
336 extern /*@falsewhennull@*/ bool exprNode_isNumLiteral (exprNode p_e) /*@*/ ;
339 exprNode_makeInitialization (/*@only@*/ idDecl p_t, /*@only@*/ exprNode p_e);
341 exprNode exprNode_makeEmptyInitialization (/*@only@*/ idDecl p_t) ;
343 extern bool exprNode_isInitializer (exprNode p_e) /*@*/ ;
345 extern bool exprNode_matchType (ctype p_expected, exprNode p_e);
347 extern /*@notnull@*/ /*@only@*/ exprNode
348 exprNode_defaultMarker (/*@only@*/ lltok p_def, bool p_fallThrough);
351 exprNode_iter (/*@observer@*/ uentry p_name, /*@only@*/ exprNodeList p_alist,
352 /*@only@*/ exprNode p_body, /*@observer@*/ uentry p_end);
353 extern exprNode exprNode_iterId (/*@observer@*/ uentry p_c);
354 extern exprNode exprNode_iterExpr (/*@returned@*/ exprNode p_e);
355 extern exprNode exprNode_iterNewId (/*@only@*/ cstring p_s);
357 exprNode_iterStart (/*@observer@*/ uentry p_name, /*@only@*/ exprNodeList p_alist);
358 extern exprNode exprNode_numLiteral (ctype p_c, /*@temp@*/ cstring p_t,
359 /*@only@*/ fileloc p_loc, long p_val) /*@*/ ;
360 extern void exprNode_initMod (void) /*@modifies internalState@*/ ;
361 extern exprNode exprNode_for (/*@keep@*/ exprNode p_inc, /*@keep@*/ exprNode p_body);
363 exprNode_forPred (/*@only@*/ exprNode p_init,
364 /*@only@*/ exprNode p_test, /*@only@*/ exprNode p_inc);
365 extern exprNode exprNode_floatLiteral (double p_d, ctype p_ct,
366 cstring p_text, /*@only@*/ fileloc p_loc) /*@*/ ;
367 extern /*@notnull@*/ exprNode exprNode_createId (/*@observer@*/ uentry p_c);
368 extern /*@notnull@*/ exprNode exprNode_makeConstantString (/*@temp@*/ cstring p_c, /*@only@*/ fileloc p_loc) /*@*/ ;
369 extern exprNode exprNode_cast (/*@only@*/ lltok p_tok, /*@only@*/ exprNode p_e, /*@only@*/ qtype p_q);
370 extern bool exprNode_matchLiteral (ctype p_expected, exprNode p_e);
371 extern void exprNode_checkUseParam (exprNode p_current);
372 extern void exprNode_checkSet (exprNode p_e, /*@exposed@*/ sRef p_s);
373 extern void exprNode_checkMSet (exprNode p_e, /*@exposed@*/ sRef p_s);
374 extern exprNode exprNode_checkExpr (/*@returned@*/ exprNode p_e);
375 extern bool exprNode_mustEscape (exprNode p_e);
376 extern bool exprNode_errorEscape (exprNode p_e);
377 extern bool exprNode_mayEscape (exprNode p_e);
378 extern exprNode exprNode_whilePred (/*@only@*/ exprNode p_test);
380 exprNode_updateLocation (/*@returned@*/ exprNode p_e, /*@temp@*/ fileloc p_loc);
381 extern void exprNode_freeShallow (/*@only@*/ exprNode p_e);
382 extern void exprNode_destroyMod (void) /*@modifies internalState@*/ ;
383 extern /*@falsewhennull@*/ bool exprNode_isAssign (exprNode p_e) /*@*/ ;
386 extern bool exprNode_isDefaultMarker (exprNode p_e) /*@*/ ;
387 extern bool exprNode_isCaseMarker (exprNode p_e) /*@*/ ;
388 extern bool exprNode_isLabelMarker (exprNode p_e) /*@*/ ;
391 extern /*@only@*/ exprNode exprNode_combineLiterals (/*@only@*/ exprNode p_e, /*@only@*/ exprNode p_rest) ;
393 extern /*@only@*/ fileloc exprNode_getNextSequencePoint (exprNode p_e) ;
396 exprNode exprNode_createNew(ctype p_c);
399 bool exprNode_isInitBlock (exprNode p_e);
402 # error "Multiple include"