+/*
+** Splint - annotation-assisted static program checker
+** Copyright (C) 1994-2003 University of Virginia,
+** Massachusetts Institute of Technology
+**
+** This program is free software; you can redistribute it and/or modify it
+** under the terms of the GNU General Public License as published by the
+** Free Software Foundation; either version 2 of the License, or (at your
+** option) any later version.
+**
+** This program is distributed in the hope that it will be useful, but
+** WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+** General Public License for more details.
+**
+** The GNU General Public License is available from http://www.gnu.org/ or
+** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+** MA 02111-1307, USA.
+**
+** For information on splint: info@splint.org
+** To report a bug: splint-bug@splint.org
+** For more information: http://www.splint.org
+*/
+
/*
*
** constraintResolve.c
*/
-//#define DEBUGPRINT 1
+/* #define DEBUGPRINT 1 */
# include <ctype.h> /* for isdigit */
-# include "lclintMacros.nf"
+# include "splintMacros.nf"
# include "basic.h"
# include "cgrammar.h"
# include "cgrammar_tokens.h"
# include "exprChecks.h"
# include "exprNodeSList.h"
+/*@access constraint, exprNode @*/ /*!!! NO! Don't do this so recklessly - design your code more carefully so you don't need to! */
-/*@access constraint, exprNode @*/
-
-
-static constraint inequalitySubstitute (/*@returned@*/ constraint p_c, constraintList p_p);
-
-
+static constraint inequalitySubstitute (/*@returned@*/ constraint p_c, constraintList p_p);
static bool rangeCheck (arithType p_ar1, /*@observer@*/ constraintExpr p_expr1, arithType p_ar2, /*@observer@*/ constraintExpr p_expr2);
-static constraint inequalitySubstituteUnsound (/*@returned@*/ constraint p_c, constraintList p_p);
-
-static constraint inequalitySubstituteStrong (/*@returned@*/ constraint p_c, constraintList p_p);
+static constraint inequalitySubstituteUnsound (/*@returned@*/ constraint p_c, constraintList p_p);
+static constraint inequalitySubstituteStrong (/*@returned@*/ constraint p_c, constraintList p_p);
static constraint constraint_searchandreplace (/*@returned@*/ constraint p_c, constraintExpr p_old, constraintExpr p_newExpr);
-
static constraint constraint_addOr (/*@returned@*/ constraint p_orig, /*@observer@*/ constraint p_orConstr);
static bool resolveOr (/*@temp@*/constraint p_c, /*@observer@*/ /*@temp@*/ constraintList p_list);
static /*@only@*/ constraintList reflectChangesEnsuresFree1 (/*@only@*/ constraintList p_pre2, constraintList p_post1);
-/*********************************************/
-
-
-
/*@only@*/ constraintList constraintList_mergeEnsuresFreeFirst (constraintList list1, constraintList list2)
{
constraintList ret;
constraintList temp;
- //ret = constraintList_makeNew();
-
llassert(constraintList_isDefined(list1) );
llassert(constraintList_isDefined(list2) );
return temp;
- //ret = constraintList_addList (ret, list2);
- //return ret;
}
DPRINTF((message ("constraintList_mergeRequires: merging %s and %s ", constraintList_print (list1), constraintList_print(list2) ) ) );
+ if (context_getFlag (FLG_REDUNDANTCONSTRAINTS) )
+ {
+ ret = constraintList_copy(list1);
+ ret = constraintList_addList(ret, list2);
+ return ret;
+ }
+
/* get constraints in list1 not satified by list2 */
temp = constraintList_reflectChanges(list1, list2);
DPRINTF((message ("constraintList_mergeRequires: temp = %s", constraintList_print(temp) ) ) );
{
constraintList temp, temp2;
- DPRINTF( (message ("magically merging constraint into parent:%s for", exprNode_unparse (parent) )) );
+ DPRINTF((message ("magically merging constraint into parent:%s for", exprNode_unparse (parent) )) );
- DPRINTF( (message (" children: %s and %s", exprNode_unparse (child1), exprNode_unparse(child2) ) ) );
+ DPRINTF((message (" children: %s and %s", exprNode_unparse (child1), exprNode_unparse(child2) ) ) );
+
+ if (exprNode_isUndefined(parent) )
+ {
+ llassert (exprNode_isDefined(parent) );
+ return;
+ }
+
+
if (exprNode_isError (child1) || exprNode_isError(child2) )
{
if (exprNode_isError (child1) && !exprNode_isError(child2) )
else
{
llassert(exprNode_isError(child2) );
- //parent->requiresConstraints = constraintList_makeNew();
- //parent->ensuresConstraints = constraintList_makeNew();
return;
}
}
llassert(!exprNode_isError (child1) && ! exprNode_isError(child2) );
- DPRINTF( (message ("Child constraints are %s %s and %s %s",
+ DPRINTF((message ("Child constraints are %s %s and %s %s",
constraintList_print (child1->requiresConstraints),
constraintList_print (child1->ensuresConstraints),
constraintList_print (child2->requiresConstraints),
parent->requiresConstraints = temp2;
- DPRINTF( (message ("Parent requires constraints are %s ",
+ DPRINTF((message ("Parent requires constraints are %s ",
constraintList_print (parent->requiresConstraints)
) ) );
child2->ensuresConstraints);
- DPRINTF( (message ("Parent constraints are %s and %s ",
+ DPRINTF((message ("Parent constraints are %s and %s ",
constraintList_print (parent->requiresConstraints),
constraintList_print (parent->ensuresConstraints)
) ) );
}
-
-
-
/*@only@*/ constraintList constraintList_subsumeEnsures (constraintList list1, constraintList list2)
{
}
else
{
- DPRINTF ( (message ("Subsuming %s", constraint_print (el) ) ) );
+ DPRINTF ((message ("Subsuming %s", constraint_print (el) ) ) );
}
} end_constraintList_elements;
return ret;
}
-
-
/* tries to resolve constraints in list pre2 using post1 */
static /*@only@*/ constraintList reflectChangesNoOr (/*@observer@*/ /*@temp@*/ constraintList pre2, /*@observer@*/ /*@temp@*/ constraintList post1)
temp = constraint_substitute (el, post1);
if (!constraintList_resolve (temp, post1) )
{
- // try inequality substitution
- //constraint temp2;
-
- // the inequality substitution may cause us to lose information
- //so we don't want to store the result but we do it anyway
+ /* try inequality substitution
+ the inequality substitution may cause us to lose information
+ so we don't want to store the result but we do it anyway
+ */
temp2 = constraint_copy (temp);
- // if (context_getFlag (FLG_ORCONSTRAINT) )
temp2 = inequalitySubstitute (temp2, post1);
if (!constraintList_resolve (temp2, post1) )
{
static constraint constraint_addOr (/*@returned@*/ constraint orig, /*@observer@*/ constraint orConstr)
{
constraint c;
+
+ llassert(constraint_isDefined(orig) );
+
c = orig;
DPRINTF((message("constraint_addor: oring %s onto %s", constraint_printOr(orConstr), constraint_printOr(orig) ) ));
int numberOr;
numberOr = 0;
+
+ llassert(constraint_isDefined(c) );
+
DPRINTF(( message("resolveOr: constraint %s and list %s", constraint_printOr(c), constraintList_print(list) ) ));
+
temp = c;
do
{
constraint temp;
- llassert(constraint_isUndefined (c->or ) );
+ llassert(constraint_isDefined (c ) );
+
+ DPRINTF((message("doResolve:: call on constraint c = : %q and constraintList %q",
+ constraint_printOr(c), constraintList_print(post1)
+ )
+ ));
if (!resolveOr (c, post1) )
{
temp = constraint_substitute (c, post1);
+ DPRINTF((message("doResolve:: after substitute temp is %q",
+ constraint_printOr(temp)
+ )
+ ));
+
if (!resolveOr (temp, post1) )
{
- // try inequality substitution
+ /* try inequality substitution */
constraint temp2;
- // the inequality substitution may cause us to lose information
- //so we don't want to store the result but we do anyway
- temp2 = constraint_copy (c);
- // if (context_getFlag (FLG_ORCONSTRAINT) )
- temp2 = inequalitySubstitute (temp2, post1);
- if (!resolveOr (temp2, post1) )
+ /* the inequality substitution may cause us to lose information
+ so we don't want to store the result but we do anyway
+ */
+ temp2 = constraint_copy (c);
+ temp2 = inequalitySubstitute (temp2, post1);
+
+ if (!resolveOr (temp2, post1) )
+ {
+ constraint temp3;
+ temp3 = constraint_copy(temp2);
+
+ temp3 = inequalitySubstituteStrong (temp3, post1);
+ if (!resolveOr (temp3, post1) )
{
- constraint temp3;
- temp3 = constraint_copy(temp2);
-
- temp3 = inequalitySubstituteStrong (temp3, post1);
- if (!resolveOr (temp3, post1) )
+ temp2 = inequalitySubstituteUnsound (temp2, post1);
+ if (!resolveOr (temp2, post1) )
{
- temp2 = inequalitySubstituteUnsound (temp2, post1);
- if (!resolveOr (temp2, post1) )
+ if (!constraint_same (temp, temp2) )
{
- if (!constraint_same (temp, temp2) )
- temp = constraint_addOr (temp, temp2);
-
- if (!constraint_same (temp, temp3) && !constraint_same (temp3, temp2) )
- temp = constraint_addOr (temp, temp3);
+ /* drl added 8/28/2002*/
+ /*make sure that the information from
+ a post condition like i = i + 1 is transfered
+ */
+ constraint tempSub;
+ tempSub = constraint_substitute (temp2, post1);
+
+ DPRINTF((
+ message("doResolve: adding %s ",
+ constraint_printOr(tempSub)
+ )
+ ));
- *resolved = FALSE;
+ DPRINTF((
+ message("doResolve: not adding %s ",
+ constraint_printOr(temp2)
+ )
+ ));
- constraint_free(temp2);
- constraint_free(temp3);
- constraint_free(c);
+ temp = constraint_addOr (temp, tempSub);
+ constraint_free(tempSub);
- return temp;
}
+ if (!constraint_same (temp, temp3) && !constraint_same (temp3, temp2) )
+ {
+ /* drl added 8/28/2002*/
+ /*make sure that the information from
+ a post condition like i = i + 1 is transfered
+ */
+ constraint tempSub;
+
+ tempSub = constraint_substitute (temp3, post1);
+
+ DPRINTF((
+ message("doResolve: adding %s ",
+ constraint_printOr(tempSub)
+ )
+ ));
+
+
+ DPRINTF((
+ message("doResolve: not adding %s ",
+ constraint_printOr(temp3)
+ )
+ ));
+
+ temp = constraint_addOr (temp, tempSub);
+
+ constraint_free(tempSub);
+ }
+ *resolved = FALSE;
+
constraint_free(temp2);
constraint_free(temp3);
+ constraint_free(c);
+
+ return temp;
}
- else
- {
- constraint_free(temp2);
- constraint_free(temp3);
- }
+ constraint_free(temp2);
+ constraint_free(temp3);
}
else
{
constraint_free(temp2);
- }
-
+ constraint_free(temp3);
+ }
}
- constraint_free(temp);
+ else
+ {
+ constraint_free(temp2);
+ }
+
}
- constraint_free(c);
-
- *resolved = TRUE;
- return NULL;
-
+ constraint_free(temp);
+ }
+ constraint_free(c);
+
+ *resolved = TRUE;
+ return NULL;
}
static /*@only@*/ constraint doResolveOr (/*@observer@*/ /*@temp@*/ constraint c, constraintList post1, /*@out@*/bool * resolved)
constraint ret;
constraint next;
constraint curr;
-
DPRINTF(( message("doResolveOr: constraint %s and list %s", constraint_printOr(c), constraintList_print(post1) ) ));
-
-
*resolved = FALSE;
-
+
+ llassert(constraint_isDefined(c) );
ret = constraint_copy(c);
+ llassert(constraint_isDefined(ret) );
+
if (constraintList_isEmpty(post1) )
{
return ret;
curr = doResolve (curr, post1, resolved);
- if (*resolved)
+ if (*resolved)
{
/* curr is null so we don't try to free it*/
llassert(curr == NULL);
}
else
{
- DPRINTF ( (message ("Resolved away %s ", constraint_print(el) ) ) );
+ DPRINTF ((message ("Resolved away %s ", constraint_print(el) ) ) );
}
} end_constraintList_elements;
static bool constraint_conflict (constraint c1, constraint c2)
{
-
- if (constraintExpr_similar(c1->lexpr, c2->lexpr) )
+
+ llassert(constraint_isDefined(c1) );
+ llassert(constraint_isDefined(c2) );
+
+ if (constraintExpr_similar (c1->lexpr, c2->lexpr))
{
if (c1->ar == EQ)
if (c1->ar == c2->ar)
{
- DPRINTF ( (message ("%s conflicts with %s ", constraint_print (c1), constraint_print(c2) ) ) );
+ DPRINTF (("%s conflicts with %s", constraint_unparse (c1), constraint_unparse (c2)));
return TRUE;
}
}
- // This is a slight kludg to prevent circular constraints like
- // strlen(str) == maxRead(s) + strlen(str);
+ /* This is a slight kludge to prevent circular constraints like
+ strlen(str) == maxRead(s) + strlen(str);
+ */
- /*@i324234*/ //clean this up
+ /*this code is functional but it may be worth cleaning up at some point. */
if (c1->ar == EQ)
if (c1->ar == c2->ar)
if (constraintTerm_isExprNode(term) )
{
- DPRINTF ( (message ("%s conflicts with %s ", constraint_print (c1), constraint_print(c2) ) ) );
+ DPRINTF ((message ("%s conflicts with %s ", constraint_print (c1), constraint_print(c2) ) ) );
return TRUE;
}
}
if (constraint_tooDeep(c1) || constraint_tooDeep(c2) )
{
- DPRINTF ( (message ("%s conflicts with %s (constraint is too deep", constraint_print (c1), constraint_print(c2) ) ) );
+ DPRINTF ((message ("%s conflicts with %s (constraint is too deep", constraint_print (c1), constraint_print(c2) ) ) );
return TRUE;
}
- DPRINTF ( (message ("%s doesn't conflict with %s ", constraint_print (c1), constraint_print(c2) ) ) );
+ DPRINTF ((message ("%s doesn't conflict with %s ", constraint_print (c1), constraint_print(c2) ) ) );
return FALSE;
static void constraint_fixConflict (/*@temp@*/ constraint good, /*@temp@*/ /*@observer@*/ constraint conflicting) /*@modifies good@*/
{
- if (conflicting->ar ==EQ )
+ llassert(constraint_isDefined(conflicting) );
+
+ if (conflicting->ar == EQ)
{
+ llassert (constraint_isDefined(good));
+ DPRINTF (("Replacing here!"));
good->expr = constraintExpr_searchandreplace (good->expr, conflicting->lexpr, conflicting->expr);
good = constraint_simplify (good);
}
}
-//check if constraint in list1 conflicts with constraints in List2. If so we
-//remove form list1 and change list2.
+/*
+ check if constraint in list1 conflicts with constraints in List2. If so we
+ remove form list1 and change list2.
+*/
+
constraintList constraintList_fixConflicts (constraintList list1, constraintList list2)
{
constraintList ret;
return ret;
}
-/*returns true if constraint post satifies cosntriant pre */
-static bool satifies (constraint pre, constraint post)
+/*returns true if constraint post satisfies cosntriant pre */
+
+static bool constraintResolve_satisfies (constraint pre, constraint post)
{
- if (constraint_isAlwaysTrue (pre) )
+ llassert (constraint_isDefined(pre));
+ llassert (constraint_isDefined(post));
+
+ if (constraint_isAlwaysTrue (pre))
return TRUE;
if (!constraintExpr_similar (pre->lexpr, post->lexpr) )
{
return FALSE;
}
+
if (constraintExpr_isUndefined(post->expr))
{
llassert(FALSE);
return FALSE;
}
-
+
return rangeCheck (pre->ar, pre->expr, post->ar, post->expr);
}
-bool constraintList_resolve (/*@temp@*/ /*@observer@*/ constraint c, /*@temp@*/ /*@observer@*/ constraintList p)
+bool constraintList_resolve (/*@temp@*/ /*@observer@*/ constraint c,
+ /*@temp@*/ /*@observer@*/ constraintList p)
{
+ DPRINTF (("[resolve] Trying to resolve constraint: %s using %s",
+ constraint_unparse (c),
+ constraintList_unparse (p)));
+
constraintList_elements (p, el)
{
- if ( satifies (c, el) )
+ if (constraintResolve_satisfies (c, el))
{
- DPRINTF ( (message ("\n%s Satifies %s\n ", constraint_print(el), constraint_print(c) ) ) );
+ DPRINTF (("constraintList_resolve: %s satifies %s",
+ constraint_unparse (el), constraint_unparse (c)));
return TRUE;
}
- DPRINTF ( (message ("\n%s does not satify %s\n ", constraint_print(el), constraint_print(c) ) ) );
+
+ DPRINTF (("constraintList_resolve: %s does not satify %s\n ",
+ constraint_unparse (el), constraint_unparse (c)));
}
end_constraintList_elements;
- DPRINTF ( (message ("no constraints satify %s", constraint_print(c) ) ));
+
+ DPRINTF (("No constraints satify: %s", constraint_unparse (c)));
return FALSE;
}
{
case GTE:
case GT:
- if ( (ar2 == GT) || (ar2 == GTE) || (ar2 == EQ) )
+ if ((ar2 == GT) || (ar2 == GTE) || (ar2 == EQ))
{
return TRUE;
}
case LT:
case LTE:
- // llassert(FALSE);
- if ( (ar2 == LT) || (ar2 == LTE) || (ar2 == EQ) )
+ if ((ar2 == LT) || (ar2 == LTE) || (ar2 == EQ))
return TRUE;
break;
default:
return FALSE;
}
+/*checks for the case expr2 == sizeof buf1 and buf1 is a fixed array*/
+static bool sizeofBufComp(constraintExpr buf1, constraintExpr expr2)
+{
+ constraintTerm ct;
+ exprNode e, t;
+ sRef s1, s2;
+
+ llassert(constraintExpr_isDefined(buf1) && constraintExpr_isDefined(expr2) );
+
+ /*@access constraintExpr@*/
+
+ if ((expr2->kind != term) && (buf1->kind != term) )
+ return FALSE;
+
+
+ ct = constraintExprData_termGetTerm(expr2->data);
+
+ if (!constraintTerm_isExprNode(ct) )
+ return FALSE;
+
+ e = constraintTerm_getExprNode(ct);
+
+ llassert (exprNode_isDefined(e));
+
+ if (! (exprNode_isDefined(e)))
+ return FALSE;
+
+ if (e->kind != XPR_SIZEOF)
+ return FALSE;
+
+ t = exprData_getSingle (e->edata);
+ s1 = exprNode_getSref (t);
+
+ s2 = constraintTerm_getsRef(constraintExprData_termGetTerm(buf1->data) );
+
+ /*drl this may be the wronge thing to test for but this
+ seems to work correctly*/
+ if (sRef_similarRelaxed(s1, s2) || sRef_sameName (s1, s2) )
+ {
+ /* origly checked that ctype_isFixedArray(sRef_getType(s2)) but
+ removed that test */
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/* look for the special case of
+ maxSet(buf) >= sizeof(buf) - 1
+*/
+
+/*drl eventually it would be good to check that
+ buf is of type char.*/
+
+static bool sizeOfMaxSet( /*@observer@*/ /*@temp@*/ constraint c)
+{
+ constraintExpr l, r, buf1, buf2, con;
+
+ DPRINTF(( message("sizeOfMaxSet: checking %s ", constraint_print(c) )
+ ));
+
+ llassert (constraint_isDefined(c) );
+
+ l = c->lexpr;
+ r = c->expr;
+
+ if (!((c->ar == EQ) || (c->ar == GTE) || (c->ar == LTE) ) )
+ return FALSE;
+
+ llassert (constraintExpr_isDefined(l) );
+ llassert (constraintExpr_isDefined(r) );
+
+ /*check if the constraintExpr is MaxSet(buf) */
+ if (l->kind == unaryExpr)
+ {
+ if (constraintExprData_unaryExprGetOp(l->data) == MAXSET)
+ {
+ buf1 = constraintExprData_unaryExprGetExpr(l->data);
+ }
+ else
+ return FALSE;
+ }
+ else
+ return FALSE;
+
+
+ if (r->kind != binaryexpr)
+ return FALSE;
+
+ buf2 = constraintExprData_binaryExprGetExpr1(r->data);
+ con = constraintExprData_binaryExprGetExpr2(r->data);
+
+ if (constraintExprData_binaryExprGetOp(r->data) == BINARYOP_MINUS)
+ {
+ if (constraintExpr_canGetValue(con) )
+ {
+ long i;
+
+ i = constraintExpr_getValue(con);
+ if (i != 1)
+ {
+ return FALSE;
+ }
+ }
+ else
+ return FALSE;
+ }
+
+ if (constraintExprData_binaryExprGetOp(r->data) == BINARYOP_PLUS)
+ {
+ if (constraintExpr_canGetValue(con) )
+ {
+ long i;
+
+ i = constraintExpr_getValue(con);
+ if (i != -1)
+ {
+ return FALSE;
+ }
+ }
+ else
+ return FALSE;
+ }
+
+ if (sizeofBufComp(buf1, buf2))
+ {
+ return TRUE;
+ }
+ else
+ {
+ return FALSE;
+ }
+}
+/*@noaccess constraintExpr@*/
+
/* We look for constraint which are tautologies */
bool constraint_isAlwaysTrue (/*@observer@*/ /*@temp@*/ constraint c)
constraintExpr l, r;
bool rHasConstant;
int rConstant;
+
+
+ llassert (constraint_isDefined(c) );
l = c->lexpr;
r = c->expr;
DPRINTF(( message("constraint_IsAlwaysTrue:examining %s", constraint_print(c) ) ));
-
+
+ if (sizeOfMaxSet(c) )
+ return TRUE;
+
if (constraintExpr_canGetValue(l) && constraintExpr_canGetValue(r) )
{
int cmp;
}
}
- if (constraintExpr_similar (l,r) )
+ if (constraintExpr_similar (l,r))
{
switch (c->ar)
{
+ case CASTEQ:
case EQ:
case GTE:
case LTE:
l = constraintExpr_copy (c->lexpr);
r = constraintExpr_copy (c->expr);
- // l = constraintExpr_propagateConstants (l, &lHasConstant, &lConstant);
r = constraintExpr_propagateConstants (r, &rHasConstant, &rConstant);
if (constraintExpr_similar (l,r) && (rHasConstant ) )
{
- DPRINTF(( message("constraint_IsAlwaysTrue: after removing constants %s and %s are similar", constraintExpr_unparse(l), constraintExpr_unparse(r) ) ));
- DPRINTF(( message("constraint_IsAlwaysTrue: rconstant is %d", rConstant ) ));
+ DPRINTF(( message("constraint_IsAlwaysTrue: after removing constants %s and %s are similar", constraintExpr_unparse(l), constraintExpr_unparse(r) ) ));
+ DPRINTF(( message("constraint_IsAlwaysTrue: rconstant is %d", rConstant ) ));
constraintExpr_free(l);
constraintExpr_free(r);
static bool rangeCheck (arithType ar1, /*@observer@*/ constraintExpr expr1, arithType ar2, /*@observer@*/ constraintExpr expr2)
{
- DPRINTF ((message ("Doing Range CHECK %s and %s", constraintExpr_unparse(expr1), constraintExpr_unparse(expr2) ) ));
+ DPRINTF (("Doing range check %s and %s",
+ constraintExpr_unparse (expr1), constraintExpr_unparse (expr2)));
- if (! arithType_canResolve (ar1, ar2) )
+ if (!arithType_canResolve (ar1, ar2))
return FALSE;
switch (ar1)
- {
- case GTE:
- if (constraintExpr_similar (expr1, expr2) )
- return TRUE;
- /*@fallthrough@*/
- case GT:
- if (! (constraintExpr_canGetValue (expr1) &&
- constraintExpr_canGetValue (expr2) ) )
- {
- constraintExpr e1, e2;
- bool p1, p2;
- int const1, const2;
-
- e1 = constraintExpr_copy(expr1);
- e2 = constraintExpr_copy(expr2);
-
- e1 = constraintExpr_propagateConstants (e1, &p1, &const1);
-
- e2 = constraintExpr_propagateConstants (e2, &p2, &const2);
-
- if (p1 || p2)
- {
- if (!p1)
- const1 = 0;
-
- if (!p2)
- const2 = 0;
-
- if (const1 <= const2)
- if (constraintExpr_similar (e1, e2) )
- {
- constraintExpr_free(e1);
- constraintExpr_free(e2);
- return TRUE;
- }
- }
- DPRINTF( ("Can't Get value"));
-
- constraintExpr_free(e1);
- constraintExpr_free(e2);
- return FALSE;
- }
-
- if (constraintExpr_compare (expr2, expr1) >= 0)
- return TRUE;
-
- return FALSE;
- case EQ:
- if (constraintExpr_similar (expr1, expr2) )
- return TRUE;
-
- return FALSE;
- case LTE:
- if (constraintExpr_similar (expr1, expr2) )
- return TRUE;
- /*@fallthrough@*/
- case LT:
- if (! (constraintExpr_canGetValue (expr1) &&
- constraintExpr_canGetValue (expr2) ) )
- {
- constraintExpr e1, e2;
- bool p1, p2;
- int const1, const2;
-
- e1 = constraintExpr_copy(expr1);
- e2 = constraintExpr_copy(expr2);
-
- e1 = constraintExpr_propagateConstants (e1, &p1, &const1);
-
- e2 = constraintExpr_propagateConstants (e2, &p2, &const2);
-
- if (p1 || p2)
- {
- if (!p1)
- const1 = 0;
-
- if (!p2)
- const2 = 0;
-
- if (const1 >= const2)
- if (constraintExpr_similar (e1, e2) )
- {
- constraintExpr_free(e1);
- constraintExpr_free(e2);
- return TRUE;
- }
- }
- constraintExpr_free(e1);
- constraintExpr_free(e2);
-
- DPRINTF( ("Can't Get value"));
- return FALSE;
- }
-
- if (constraintExpr_compare (expr2, expr1) <= 0)
- return TRUE;
-
- return FALSE;
-
- default:
+ {
+ case GTE:
+ if (constraintExpr_similar (expr1, expr2) )
+ return TRUE;
+ /*@fallthrough@*/
+ case GT:
+ if (! (constraintExpr_canGetValue (expr1) &&
+ constraintExpr_canGetValue (expr2) ) )
+ {
+ constraintExpr e1, e2;
+ bool p1, p2;
+ int const1, const2;
+
+ e1 = constraintExpr_copy(expr1);
+ e2 = constraintExpr_copy(expr2);
+
+ e1 = constraintExpr_propagateConstants (e1, &p1, &const1);
+ e2 = constraintExpr_propagateConstants (e2, &p2, &const2);
+
+ if (p1 || p2)
+ {
+ if (!p1)
+ const1 = 0;
+
+ if (!p2)
+ const2 = 0;
+
+ if (const1 <= const2)
+ if (constraintExpr_similar (e1, e2) )
+ {
+ constraintExpr_free(e1);
+ constraintExpr_free(e2);
+ return TRUE;
+ }
+ }
+ DPRINTF(("Can't Get value"));
+
+ constraintExpr_free(e1);
+ constraintExpr_free(e2);
+ return FALSE;
+ }
+
+ if (constraintExpr_compare (expr2, expr1) >= 0)
+ return TRUE;
+
+ return FALSE;
+ case EQ:
+ if (constraintExpr_similar (expr1, expr2) )
+ return TRUE;
+
+ return FALSE;
+ case LTE:
+ if (constraintExpr_similar (expr1, expr2) )
+ return TRUE;
+ /*@fallthrough@*/
+ case LT:
+ if (! (constraintExpr_canGetValue (expr1) &&
+ constraintExpr_canGetValue (expr2) ) )
+ {
+ constraintExpr e1, e2;
+ bool p1, p2;
+ int const1, const2;
+
+ e1 = constraintExpr_copy(expr1);
+ e2 = constraintExpr_copy(expr2);
+
+ e1 = constraintExpr_propagateConstants (e1, &p1, &const1);
+
+ e2 = constraintExpr_propagateConstants (e2, &p2, &const2);
+
+ if (p1 || p2)
+ {
+ if (!p1)
+ const1 = 0;
+
+ if (!p2)
+ const2 = 0;
+
+ if (const1 >= const2)
+ if (constraintExpr_similar (e1, e2) )
+ {
+ constraintExpr_free(e1);
+ constraintExpr_free(e2);
+ return TRUE;
+ }
+ }
+ constraintExpr_free(e1);
+ constraintExpr_free(e2);
+
+ DPRINTF(("Can't Get value"));
+ return FALSE;
+ }
+
+ if (constraintExpr_compare (expr2, expr1) <= 0)
+ return TRUE;
+
+ return FALSE;
+
+ default:
llcontbug((message("Unhandled case in switch: %q", arithType_print(ar1) ) ) );
- }
+ }
BADEXIT;
}
static constraint constraint_searchandreplace (/*@returned@*/ constraint c, constraintExpr old, constraintExpr newExpr)
{
- DPRINTF (("Doing replace for lexpr") );
+ llassert (constraint_isDefined(c));
+
+ DPRINTF (("Starting replace lexpr [%p]: %s < %s ==> %s > in %s", c,
+ constraintExpr_unparse (c->lexpr),
+ constraintExpr_unparse (old), constraintExpr_unparse (newExpr),
+ constraint_unparse (c)));
c->lexpr = constraintExpr_searchandreplace (c->lexpr, old, newExpr);
- DPRINTF (("Doing replace for expr") );
+ DPRINTF (("Finished replace lexpr [%p]: %s", c, constraintExpr_unparse (c->lexpr)));
c->expr = constraintExpr_searchandreplace (c->expr, old, newExpr);
return c;
}
{
bool ret;
ret = FALSE;
-
+
+ llassert (constraint_isDefined (c));
+
ret = constraintExpr_search (c->lexpr, old);
ret = ret || constraintExpr_search (c->expr, old);
return ret;
}
-//adjust file locs and stuff
+/* adjust file locs and stuff */
static constraint constraint_adjust (/*@returned@*/ constraint substitute, /*@observer@*/ constraint old)
{
fileloc loc1, loc2, loc3;
- DPRINTF ( (message("Start adjust on %s and %s", constraint_print(substitute),
+ DPRINTF ((message("Start adjust on %s and %s", constraint_print(substitute),
constraint_print(old))
));
+ llassert(constraint_isDefined(substitute));
+ llassert(constraint_isDefined(old));
+
loc1 = constraint_getFileloc (old);
-
- loc2 = constraintExpr_getFileloc (substitute->lexpr);
-
- loc3 = constraintExpr_getFileloc (substitute->expr);
-
+ loc2 = constraintExpr_loc (substitute->lexpr);
+ loc3 = constraintExpr_loc (substitute->expr);
- // special case of an equality that "contains itself"
+ /* special case of an equality that "contains itself" */
if (constraintExpr_search (substitute->expr, substitute->lexpr) )
if (fileloc_closer (loc1, loc3, loc2))
{
constraintExpr temp;
- DPRINTF ( (message("Doing adjust on %s", constraint_print(substitute) )
+ DPRINTF ((message("Doing adjust on %s", constraint_print(substitute) )
));
temp = substitute->lexpr;
substitute->lexpr = substitute->expr;
constraint inequalitySubstitute (/*@returned@*/ constraint c, constraintList p)
{
+ llassert(constraint_isDefined(c) );
+
if (c->ar != GTE)
return c;
constraintList_elements (p, el)
{
- if ( (el->ar == LT ) )
- // if (!constraint_conflict (c, el) )
+
+ llassert(constraint_isDefined(el) );
+
+ if ((el->ar == LT ) )
{
- //constraint temp;
constraintExpr temp2;
- /*@i22*/
-
- //temp = constraint_copy(el);
-
- // temp = constraint_adjust(temp, c);
-
if (constraintExpr_same (el->expr, c->expr) )
{
DPRINTF((message ("inequalitySubstitute Replacing %q in %q with %q",
{
DPRINTF (( message ("inequalitySubstituteStrong examining substituting for %q", constraint_print(c) ) ));
+ llassert(constraint_isDefined(c) );
+
+ if (! (constraint_isDefined(c) ) )
+ {
+ return c;
+ }
+
if (c->ar != GTE)
return c;
constraint_print(c), constraintList_print(p) ) ));
constraintList_elements (p, el)
{
+
DPRINTF (( message ("inequalitySubstituteStrong examining substituting %s on %s", constraint_print(el), constraint_print(c) ) ));
- if ( (el->ar == LT ) || (el->ar == LTE ) )
- // if (!constraint_conflict (c, el) )
+ llassert(constraint_isDefined(el) );
+ if ((el->ar == LT ) || (el->ar == LTE ) )
{
- //constraint temp;
constraintExpr temp2;
- /*@i22*/
-
- //temp = constraint_copy(el);
-
- // temp = constraint_adjust(temp, c);
-
if (constraintExpr_same (el->lexpr, c->expr) )
{
DPRINTF((message ("inequalitySubstitute Replacing %s in %s with %s",
));
temp2 = constraintExpr_copy (el->expr);
constraintExpr_free(c->expr);
- if ( (el->ar == LTE ) )
+ if ((el->ar == LTE ) )
{
c->expr = temp2;
}
static constraint inequalitySubstituteUnsound (/*@returned@*/ constraint c, constraintList p)
{
DPRINTF (( message ("Doing inequalitySubstituteUnsound " ) ));
+
+ llassert(constraint_isDefined(c) );
if (c->ar != GTE)
return c;
constraintList_elements (p, el)
{
- DPRINTF (( message ("inequalitySubstituteUnsound examining substituting %s on %s", constraint_print(el), constraint_print(c) ) ));
- if ( ( el->ar == LTE) || (el->ar == LT) )
- // if (!constraint_conflict (c, el) )
+
+ llassert(constraint_isDefined(el) );
+
+ DPRINTF (( message ("inequalitySubstituteUnsound examining substituting %s on %s", constraint_print(el), constraint_print(c) ) ));
+ if (( el->ar == LTE) || (el->ar == LT) )
{
- // constraint temp;
constraintExpr temp2;
-
- //temp = constraint_copy(el);
-
- // temp = constraint_adjust(temp, c);
+
temp2 = constraintExpr_copy (el->expr);
if (el->ar == LT)
ret = constraint_copy(c);
constraintList_elements (p, el)
{
+ llassert(constraint_isDefined(el) );
if ( el->ar == EQ)
if (!constraint_conflict (ret, el) )
temp = constraint_adjust(temp, ret);
- DPRINTF((message ("Substituting %s in the constraint %s",
- constraint_print (temp), constraint_print (ret)
+ llassert(constraint_isDefined(temp) );
+
+
+ DPRINTF((message ("constraint_substitute :: Substituting in %s using %s",
+ constraint_print (ret), constraint_print (temp)
) ) );
ret = constraint_searchandreplace (ret, temp->lexpr, temp->expr);
- DPRINTF(( message ("The new constraint is %s", constraint_print (ret) ) ));
+ DPRINTF(( message (" constraint_substitute :: The new constraint is %s", constraint_print (ret) ) ));
constraint_free(temp);
}
}
end_constraintList_elements;
- DPRINTF(( message ("The finial new constraint is %s", constraint_print (ret) ) ));
ret = constraint_simplify(ret);
+
+ DPRINTF(( message (" constraint_substitute :: The final new constraint is %s", constraint_print (ret) ) ));
+
return ret;
}
constraintList_elements(target, el)
{
constraint temp;
- //drl possible problem : warning make sure that a side effect is not expected
+ /* drl possible problem : warning make sure that a side effect is not expected */
temp = constraint_substitute(el, subList);
ret = constraintList_add (ret, temp);
static constraint constraint_solve (/*@returned@*/ constraint c)
{
- DPRINTF( (message ("Solving %s\n", constraint_print(c) ) ) );
+
+ llassert(constraint_isDefined(c) );
+
+ DPRINTF((message ("Solving %s\n", constraint_print(c) ) ) );
c->expr = constraintExpr_solveBinaryExpr (c->lexpr, c->expr);
- DPRINTF( (message ("Solved and got %s\n", constraint_print(c) ) ) );
+ DPRINTF((message ("Solved and got %s\n", constraint_print(c) ) ) );
return c;
}
static constraint constraint_swapLeftRight (/*@returned@*/ constraint c)
{
constraintExpr temp;
+
+ llassert(constraint_isDefined(c) );
+
c->ar = flipAr (c->ar);
temp = c->lexpr;
c->lexpr = c->expr;
constraint constraint_simplify ( /*@returned@*/ constraint c)
{
-
+
+ llassert(constraint_isDefined(c) );
+
DPRINTF(( message("constraint_simplify on %q ", constraint_print(c) ) ));
if (constraint_tooDeep(c))
andersk / splint.git / blobdiff