# include "cgrammar_tokens.h"
# include "exprChecks.h"
-# include "aliasChecks.h"
# include "exprNodeSList.h"
-//# include "exprData.i"
/*@access constraint, exprNode @*/
-constraint inequalitySubstituteUnsound (constraint c, constraintList p);
+static constraint inequalitySubstitute (/*@returned@*/ constraint p_c, constraintList p_p);
-static constraint constraint_searchandreplace (constraint c, constraintExpr old, constraintExpr new);
-//bool rangeCheck (arithType ar1, constraintExpr expr1, arithType ar2, constraintExpr expr2);
-//bool satifies (constraint pre, constraint post);
-//bool resolve (constraint c, constraintList p);
-//constraintList reflectChangesEnsures (constraintList pre2, constraintList post1);
-//constraint constraint_simplify (constraint c);
-//constraintList constraintList_fixConflicts (constraintList list1, constraintList list2);
+static bool rangeCheck (arithType p_ar1, /*@observer@*/ constraintExpr p_expr1, arithType p_ar2, /*@observer@*/ constraintExpr p_expr2);
-//constraintList constraintList_subsumeEnsures (constraintList list1, constraintList list2);
+static constraint inequalitySubstituteUnsound (/*@returned@*/ constraint p_c, constraintList p_p);
-//constraintList constraintList_mergeEnsures (constraintList list1, constraintList list2);
-constraint inequalitySubstitute (constraint c, constraintList 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;
+
+ ret = constraintList_mergeEnsures (list1, list2);
+
+ constraintList_free(list1);
+ return ret;
+}
/*@only@*/ constraintList constraintList_mergeEnsures (constraintList list1, constraintList list2)
{
)));
ret = constraintList_fixConflicts (list1, list2);
- ret = reflectChangesEnsures (ret, list2);
+ ret = reflectChangesEnsuresFree1 (ret, list2);
temp = constraintList_subsumeEnsures (ret, list2);
constraintList_free(ret);
ret = temp;
temp = constraintList_subsumeEnsures (list2, ret);
temp = constraintList_addList (temp, ret);
-
+ constraintList_free(ret);
+
DPRINTF(( message ("constraintList_mergeEnsures: returning %s ",
constraintList_print(temp) )
));
//return ret;
}
+
+/*@only@*/ constraintList constraintList_mergeRequiresFreeFirst (/*@only@*/ constraintList list1, constraintList list2)
+{
+ constraintList ret;
+
+ ret = constraintList_mergeRequires(list1, list2);
+
+ constraintList_free(list1);
+
+ return ret;
+}
+
/*@only@*/ constraintList constraintList_mergeRequires (constraintList list1, constraintList list2)
{
constraintList ret;
DPRINTF((message ("constraintList_mergeRequires: merging %s and %s ", constraintList_print (list1), constraintList_print(list2) ) ) );
/* get constraints in list1 not satified by list2 */
- temp = reflectChanges (list1, list2);
+ temp = constraintList_reflectChanges(list1, list2);
DPRINTF((message ("constraintList_mergeRequires: temp = %s", constraintList_print(temp) ) ) );
/*get constraints in list2 not satified by temp*/
- ret = reflectChanges (list2, temp);
+ ret = constraintList_reflectChanges(list2, temp);
DPRINTF((message ("constraintList_mergeRequires: ret = %s", constraintList_print(ret) ) ) );
- ret = constraintList_addList (ret, temp);
+ ret = constraintList_addListFree (ret, temp);
DPRINTF((message ("constraintList_mergeRequires: returning %s", constraintList_print(ret) ) ) );
return ret;
}
-void checkArgumentList (/*@out@*/ exprNode temp, exprNodeList arglist, fileloc sequencePoint)
-{
- temp->requiresConstraints = constraintList_makeNew();
- temp->ensuresConstraints = constraintList_makeNew();
- temp->trueEnsuresConstraints = constraintList_makeNew();
- temp->falseEnsuresConstraints = constraintList_makeNew();
-
- exprNodeList_elements (arglist, el)
- {
- exprNode_exprTraverse (el, FALSE, FALSE, sequencePoint);
- el->requiresConstraints = exprNode_traversRequiresConstraints(el);
- el->ensuresConstraints = exprNode_traversEnsuresConstraints(el);
-
- temp->requiresConstraints = constraintList_addList(temp->requiresConstraints,
- el->requiresConstraints);
-
- temp->ensuresConstraints = constraintList_addList(temp->ensuresConstraints,
- el->ensuresConstraints);
- }
- end_exprNodeList_elements;
-
-}
-
-constraintList checkCall (exprNode fcn, exprNodeList arglist)
-{
- constraintList preconditions;
- uentry temp;
- DPRINTF ( (message ("Got call that %s ( %s) ", exprNode_unparse(fcn), exprNodeList_unparse (arglist ) ) ) );
-
- temp = exprNode_getUentry (fcn);
-
- preconditions = uentry_getFcnPreconditions (temp);
-
- if (preconditions != constraintList_undefined)
- {
- preconditions= constraintList_togglePost (preconditions);
- preconditions = constraintList_doSRefFixConstraintParam (preconditions, arglist);
- }
- else
- {
- if (preconditions == NULL)
- preconditions = constraintList_makeNew();
- }
-
- return preconditions;
-}
-
-constraintList getPostConditions (exprNode fcn, exprNodeList arglist, exprNode fcnCall)
-{
- constraintList postconditions;
- uentry temp;
- DPRINTF ( (message ("Got call that %s ( %s) ", exprNode_unparse(fcn), exprNodeList_unparse (arglist ) ) ) );
-
- temp = exprNode_getUentry (fcn);
-
- postconditions = uentry_getFcnPostconditions (temp);
-
- if (postconditions != constraintList_undefined)
- {
- postconditions = constraintList_doFixResult (postconditions, fcnCall);
- postconditions = constraintList_doSRefFixConstraintParam (postconditions, arglist);
- }
- else
- {
- postconditions = constraintList_makeNew();
- }
-
- return postconditions;
-}
-
-void mergeResolve (exprNode parent, exprNode child1, exprNode child2)
+/* old name mergeResolve renamed for czech naming convention */
+void exprNode_mergeResolve (exprNode parent, exprNode child1, exprNode child2)
{
constraintList temp, temp2;
parent->requiresConstraints = constraintList_copy (child1->requiresConstraints);
if ( context_getFlag (FLG_ORCONSTRAINT) )
- temp = reflectChangesOr (child2->requiresConstraints, child1->ensuresConstraints);
+ temp = constraintList_reflectChangesOr (child2->requiresConstraints, child1->ensuresConstraints);
else
- temp = reflectChanges (child2->requiresConstraints, child1->ensuresConstraints);
+ temp = constraintList_reflectChanges(child2->requiresConstraints, child1->ensuresConstraints);
temp2 = constraintList_mergeRequires (parent->requiresConstraints, temp);
constraintList_free(parent->requiresConstraints);
{
DPRINTF ((message ("Examining %s", constraint_print (el) ) ) );
- if (!resolve (el, list2) )
+ if (!constraintList_resolve (el, list2) )
{
constraint temp;
temp = constraint_copy(el);
}
+
+/*used to be reflectChangesFreePre renamed for Czech naming conventino*/
+/* tries to resolve constraints in list pre2 using post1 */
+/*@only@*/ constraintList constraintList_reflectChangesFreePre (/*@only@*/ constraintList pre2, /*@observer@*/ constraintList post1)
+{
+ constraintList ret;
+
+ ret = constraintList_reflectChanges(pre2, post1);
+
+ constraintList_free (pre2);
+
+ return ret;
+}
+
+
+
/* tries to resolve constraints in list pre2 using post1 */
-/*@only@*/ constraintList reflectChanges (constraintList pre2, constraintList post1)
+
+static /*@only@*/ constraintList reflectChangesNoOr (/*@observer@*/ /*@temp@*/ constraintList pre2, /*@observer@*/ /*@temp@*/ constraintList post1)
{
constraintList ret;
constraint temp;
+ constraint temp2;
+
+ llassert (! context_getFlag (FLG_ORCONSTRAINT) );
+
ret = constraintList_makeNew();
DPRINTF((message ("reflectChanges: lists %s and %s", constraintList_print(pre2), constraintList_print(post1) )));
constraintList_elements (pre2, el)
{
- if (!resolve (el, post1) )
+ if (!constraintList_resolve (el, post1) )
{
- temp = substitute (el, post1);
- if (!resolve (temp, post1) )
+ temp = constraint_substitute (el, post1);
+ if (!constraintList_resolve (temp, post1) )
{
// try inequality substitution
- constraint temp2;
+ //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
temp2 = constraint_copy (temp);
// if (context_getFlag (FLG_ORCONSTRAINT) )
- temp2 = inequalitySubstitute (temp, post1);
- if (!resolve (temp2, post1) )
- {
- temp2 = inequalitySubstituteUnsound (temp2, post1);
- if (!resolve (temp2, post1) )
- ret = constraintList_add (ret, temp2);
- }
+ temp2 = inequalitySubstitute (temp2, post1);
+ if (!constraintList_resolve (temp2, post1) )
+ {
+ temp2 = inequalitySubstituteUnsound (temp2, post1);
+ if (!constraintList_resolve (temp2, post1) )
+ ret = constraintList_add (ret, temp2);
+ else
+ constraint_free(temp2);
+ }
+ else
+ {
+ constraint_free(temp2);
+ }
}
+ constraint_free(temp);
}
} end_constraintList_elements;
return ret;
}
+/* tries to resolve constraints in list pre2 using post1 */
+/*@only@*/ constraintList constraintList_reflectChanges(/*@observer@*/ constraintList pre2, /*@observer@*/ constraintList post1)
+{
+ constraintList temp;
+
+ if ( context_getFlag (FLG_ORCONSTRAINT) )
+
+ temp = constraintList_reflectChangesOr (pre2, post1);
+ else
+ temp = reflectChangesNoOr(pre2, post1);
+
+ return temp;
+}
-constraint constraint_addOr (constraint orig, constraint or)
+static constraint constraint_addOr (/*@returned@*/ constraint orig, /*@observer@*/ constraint orConstr)
{
constraint c;
c = orig;
- DPRINTF((message("constraint_addor: oring %s onto %s", constraint_printOr(or), constraint_printOr(orig) ) ));
+ DPRINTF((message("constraint_addor: oring %s onto %s", constraint_printOr(orConstr), constraint_printOr(orig) ) ));
while (c->or != NULL)
{
c = c->or;
}
- c->or = constraint_copy(or);
+
+ c->or = constraint_copy(orConstr);
DPRINTF((message("constraint_addor: returning %s",constraint_printOr(orig) ) ));
}
-bool resolveOr (constraint c, constraintList list)
+static bool resolveOr ( /*@temp@*/ constraint c, /*@observer@*/ /*@temp@*/ constraintList list)
{
constraint temp;
+ int numberOr;
+
+ numberOr = 0;
DPRINTF(( message("resolveOr: constraint %s and list %s", constraint_printOr(c), constraintList_print(list) ) ));
temp = c;
do
{
- if (resolve (temp, list) )
+ if (constraintList_resolve (temp, list) )
return TRUE;
temp = temp->or;
+ numberOr++;
+ llassert(numberOr <= 10);
}
while (constraint_isDefined(temp));
return FALSE;
}
+/*This is a "helper" function for doResolveOr */
-constraint doResolve (constraint c, constraintList post1, bool * resolved)
+static /*@only@*/ constraint doResolve (/*@only@*/ constraint c, constraintList post1, bool * resolved)
{
constraint temp;
+
+ llassert(constraint_isUndefined (c->or ) );
- if (!resolveOr (c, post1) )
+ if (!resolveOr (c, post1) )
+ {
+
+ temp = constraint_substitute (c, post1);
+
+ if (!resolveOr (temp, post1) )
{
- temp = substitute (c, post1);
- if (!resolveOr (temp, post1) )
- {
- // try inequality substitution
- constraint temp2;
-
+ // 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
+ //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);
+ temp2 = inequalitySubstitute (temp2, post1);
+ if (!resolveOr (temp2, 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) )
- temp = constraint_addOr (temp, temp2);
- *resolved = FALSE;
- return temp;
- }
+ if (!constraint_same (temp, temp2) )
+ temp = constraint_addOr (temp, temp2);
+
+ if (!constraint_same (temp, temp3) && !constraint_same (temp3, temp2) )
+ temp = constraint_addOr (temp, temp3);
+
+ *resolved = FALSE;
+
+ constraint_free(temp2);
+ constraint_free(temp3);
+ constraint_free(c);
+
+ return temp;
}
+ constraint_free(temp2);
+ constraint_free(temp3);
+ }
+ else
+ {
+ constraint_free(temp2);
+ constraint_free(temp3);
+ }
+ }
+ else
+ {
+ constraint_free(temp2);
+ }
+
}
+ constraint_free(temp);
}
-
+ constraint_free(c);
+
*resolved = TRUE;
return NULL;
-
-
}
-constraint doResolveOr (constraint c, constraintList post1, /*@out@*/bool * resolved)
+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;
+
+
ret = constraint_copy(c);
+
+ if (constraintList_isEmpty(post1) )
+ {
+ return ret;
+ }
+
next = ret->or;
ret->or = NULL;
ret = doResolve (ret, post1, resolved);
+
+ if (*resolved)
+ {
+ if (next != NULL)
+ constraint_free(next);
+
+ /*we don't need to free ret when resolved is false because ret is null*/
+ llassert(ret == NULL);
+
+ return NULL;
+ }
+
while (next != NULL)
{
curr = next;
curr->or = NULL;
curr = doResolve (curr, post1, resolved);
+
if (*resolved)
- return NULL;
-
+ {
+ /* curr is null so we don't try to free it*/
+ llassert(curr == NULL);
+
+ if (next != NULL)
+ constraint_free(next);
+
+ constraint_free(ret);
+ return NULL;
+ }
ret = constraint_addOr (ret, curr);
+ constraint_free(curr);
}
-
return ret;
}
-
-
-
-
/* tries to resolve constraints in list pr2 using post1 */
-/*@only@*/ constraintList reflectChangesOr (constraintList pre2, constraintList post1)
+/*@only@*/ constraintList constraintList_reflectChangesOr (constraintList pre2, constraintList post1)
{
bool resolved;
constraintList ret;
constraint temp;
ret = constraintList_makeNew();
- DPRINTF((message ("reflectChangesOr: lists %s and %s", constraintList_print(pre2), constraintList_print(post1) )));
+ DPRINTF((message ("constraintList_reflectChangesOr: lists %s and %s", constraintList_print(pre2), constraintList_print(post1) )));
constraintList_elements (pre2, el)
{
{
ret = constraintList_add(ret, temp);
}
+ else
+ {
+ /* we don't need to free temp when
+ resolved is false because temp is null */
+ llassert(temp == NULL);
+ }
+
} end_constraintList_elements;
- DPRINTF((message ("reflectChangesOr: returning %s", constraintList_print(ret) ) ) );
+ DPRINTF((message ("constraintList_reflectChangesOr: returning %s", constraintList_print(ret) ) ) );
return ret;
}
-/*@only@*/ constraintList reflectChangesEnsures (/*@only@*/ constraintList pre2, constraintList post1)
+static /*@only@*/ constraintList reflectChangesEnsures (/*@observer@*/ constraintList pre2, constraintList post1)
{
constraintList ret;
constraint temp;
ret = constraintList_makeNew();
constraintList_elements (pre2, el)
{
- if (!resolve (el, post1) )
+ if (!constraintList_resolve (el, post1) )
{
- temp = substitute (el, post1);
+ temp = constraint_substitute (el, post1);
llassert (temp != NULL);
- if (!resolve (temp, post1) )
+ if (!constraintList_resolve (temp, post1) )
ret = constraintList_add (ret, temp);
+ else
+ constraint_free(temp);
}
else
{
}
-bool constraint_conflict (constraint c1, constraint c2)
+static /*@only@*/ constraintList reflectChangesEnsuresFree1 (/*@only@*/ constraintList pre2, constraintList post1)
+{
+ constraintList ret;
+
+ ret = reflectChangesEnsures (pre2, post1);
+
+ constraintList_free(pre2);
+
+ return ret;
+}
+
+
+static bool constraint_conflict (constraint c1, constraint c2)
{
if (constraintExpr_similar(c1->lexpr, c2->lexpr) )
}
}
+ // This is a slight kludg to prevent circular constraints like
+ // strlen(str) == maxRead(s) + strlen(str);
+
+ /*@i324234*/ //clean this up
+
+ if (c1->ar == EQ)
+ if (c1->ar == c2->ar)
+ {
+ if (constraintExpr_search (c1->lexpr, c2->expr) )
+ if (constraintExpr_isTerm(c1->lexpr) )
+ {
+ constraintTerm term;
+
+ term = constraintExpr_getTerm(c1->lexpr);
+
+ if (constraintTerm_isExprNode(term) )
+ {
+ 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) ) ) );
+ return TRUE;
+ }
+
DPRINTF ( (message ("%s doesn't conflict with %s ", constraint_print (c1), constraint_print(c2) ) ) );
return FALSE;
}
-void constraint_fixConflict ( constraint good, /*@observer@*/ constraint conflicting) /*@modifies good@*/
+static void constraint_fixConflict (/*@temp@*/ constraint good, /*@temp@*/ /*@observer@*/ constraint conflicting) /*@modifies good@*/
{
if (conflicting->ar ==EQ )
{
}
-bool conflict (constraint c, constraintList list)
+static bool conflict (constraint c, constraintList list)
{
constraintList_elements (list, el)
return ret;
}
-bool resolve (/*@observer@*/ constraint c, /*@observer@*/ constraintList p)
-{
- constraintList_elements (p, el)
- {
- if ( satifies (c, el) )
- {
- DPRINTF ( (message ("\n%s Satifies %s\n ", constraint_print(el), constraint_print(c) ) ) );
- return TRUE;
- }
- DPRINTF ( (message ("\n%s does not satify %s\n ", constraint_print(el), constraint_print(c) ) ) );
- }
- end_constraintList_elements;
- DPRINTF ( (message ("no constraints satify %s", constraint_print(c) ) ));
- return FALSE;
-}
-
-
/*returns true if constraint post satifies cosntriant pre */
-bool satifies (constraint pre, constraint post)
+static bool satifies (constraint pre, constraint post)
{
if (constraint_isAlwaysTrue (pre) )
return TRUE;
{
return FALSE;
}
- if (post->expr == NULL)
+ if (constraintExpr_isUndefined(post->expr))
{
llassert(FALSE);
return FALSE;
return rangeCheck (pre->ar, pre->expr, post->ar, post->expr);
}
-bool arithType_canResolve (arithType ar1, arithType ar2)
+
+bool constraintList_resolve (/*@temp@*/ /*@observer@*/ constraint c, /*@temp@*/ /*@observer@*/ constraintList p)
+{
+ constraintList_elements (p, el)
+ {
+ if ( satifies (c, el) )
+ {
+ DPRINTF ( (message ("\n%s Satifies %s\n ", constraint_print(el), constraint_print(c) ) ) );
+ return TRUE;
+ }
+ DPRINTF ( (message ("\n%s does not satify %s\n ", constraint_print(el), constraint_print(c) ) ) );
+ }
+ end_constraintList_elements;
+ DPRINTF ( (message ("no constraints satify %s", constraint_print(c) ) ));
+ return FALSE;
+}
+
+static bool arithType_canResolve (arithType ar1, arithType ar2)
{
switch (ar1)
{
/* We look for constraint which are tautologies */
-bool constraint_isAlwaysTrue (constraint c)
+bool constraint_isAlwaysTrue (/*@observer@*/ /*@temp@*/ constraint c)
{
constraintExpr l, r;
- bool /*@unused@*/ lHasConstant, rHasConstant;
- int /*@unused@*/ lConstant, rConstant;
+ bool rHasConstant;
+ int rConstant;
l = c->lexpr;
r = c->expr;
{
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);
+
switch (c->ar)
{
case EQ:
}
else
{
+ constraintExpr_free(l);
+ constraintExpr_free(r);
DPRINTF(( message("Constraint %s is not always true", constraint_print(c) ) ));
return FALSE;
}
BADEXIT;
}
-bool rangeCheck (arithType ar1, /*@observer@*/ constraintExpr expr1, arithType ar2, /*@observer@*/ constraintExpr expr2)
+static bool rangeCheck (arithType ar1, /*@observer@*/ constraintExpr expr1, arithType ar2, /*@observer@*/ constraintExpr expr2)
{
- TPRINTF ((message ("Doing Range CHECK %s and %s", constraintExpr_unparse(expr1), constraintExpr_unparse(expr2) ) ));
+ DPRINTF ((message ("Doing Range CHECK %s and %s", constraintExpr_unparse(expr1), constraintExpr_unparse(expr2) ) ));
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(e1);
- e2 = constraintExpr_copy(e2);
-
- e1 = constraintExpr_propagateConstants (expr1, &p1, &const1);
-
- e2 = constraintExpr_propagateConstants (expr2, &p2, &const2);
-
- if (p1 && p2)
- 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_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_propagateConstants (expr1, &p1, &const1);
-
- e2 = constraintExpr_propagateConstants (expr2, &p2, &const2);
-
- if (p1 && p2)
- if (const1 >= const2)
- if (constraintExpr_similar (e1, e2) )
- return TRUE;
-
- DPRINTF( ("Can't Get value"));
- return FALSE;
- }
-
- if (constraintExpr_compare (expr2, expr1) <= 0)
- return TRUE;
+ 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;
-
- default:
- llcontbug((message("Unhandled case in switch: %s", arithType_print(ar1) ) ) );
- }
+ 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;
}
-
-constraint constraint_searchandreplace (constraint c, constraintExpr old, constraintExpr new)
+static constraint constraint_searchandreplace (/*@returned@*/ constraint c, constraintExpr old, constraintExpr newExpr)
{
DPRINTF (("Doing replace for lexpr") );
- c->lexpr = constraintExpr_searchandreplace (c->lexpr, old, new);
+ c->lexpr = constraintExpr_searchandreplace (c->lexpr, old, newExpr);
DPRINTF (("Doing replace for expr") );
- c->expr = constraintExpr_searchandreplace (c->expr, old, new);
+ c->expr = constraintExpr_searchandreplace (c->expr, old, newExpr);
return c;
}
}
//adjust file locs and stuff
-constraint constraint_adjust (constraint substitute, constraint old)
+static constraint constraint_adjust (/*@returned@*/ constraint substitute, /*@observer@*/ constraint old)
{
fileloc loc1, loc2, loc3;
substitute = constraint_simplify(substitute);
}
+ fileloc_free (loc1);
+ fileloc_free (loc2);
+ fileloc_free (loc3);
+
return substitute;
}
Warning this is sound but throws out information
*/
-constraint inequalitySubstitute (constraint c, constraintList p)
+
+constraint inequalitySubstitute (/*@returned@*/ constraint c, constraintList p)
{
if (c->ar != GTE)
return c;
constraintList_elements (p, el)
{
- if ( el->ar == LT)
+ if ( (el->ar == LT ) )
// if (!constraint_conflict (c, el) )
{
- constraint temp;
+ //constraint temp;
constraintExpr temp2;
- temp = constraint_copy(el);
+ /*@i22*/
+
+ //temp = constraint_copy(el);
// temp = constraint_adjust(temp, c);
if (constraintExpr_same (el->expr, c->expr) )
{
- DPRINTF((message ("inequalitySubstitute Replacing %s in %s with %s",
+ DPRINTF((message ("inequalitySubstitute Replacing %q in %q with %q",
constraintExpr_print (c->expr),
constraint_print (c),
constraintExpr_print (el->expr) )
));
temp2 = constraintExpr_copy (el->lexpr);
+ constraintExpr_free(c->expr);
c->expr = constraintExpr_makeIncConstraintExpr (temp2);
+
}
}
return c;
}
+
+/* drl7x 7/26/001
+
+ THis function is like inequalitySubstitute but it adds the rule
+ added the rules x >= y && y <= b ===> x >= b
+ x >= y && y < b ===> x >= b + 1
+
+ This is sound but sonce it throws out additional information it should only one used
+ if we're oring constraints.
+ */
+
+static constraint inequalitySubstituteStrong (/*@returned@*/ constraint c, constraintList p)
+{
+ DPRINTF (( message ("inequalitySubstituteStrong examining substituting for %q", constraint_print(c) ) ));
+
+ if (c->ar != GTE)
+ return c;
+
+ DPRINTF (( message ("inequalitySubstituteStrong examining substituting for %q with %q",
+ 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) )
+ {
+ //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",
+ constraintExpr_print (c->expr),
+ constraint_print (c),
+ constraintExpr_print (el->expr) )
+ ));
+ temp2 = constraintExpr_copy (el->expr);
+ constraintExpr_free(c->expr);
+ if ( (el->ar == LTE ) )
+ {
+ c->expr = temp2;
+ }
+ else
+ {
+ c->expr = constraintExpr_makeIncConstraintExpr (temp2);
+ }
+ }
+
+ }
+ }
+ end_constraintList_elements;
+
+ c = constraint_simplify(c);
+ return c;
+}
+
+
/* This function performs substitutions based on the rule:
for a constraint of the form expr1 >= expr2; a < b =>
a = b -1 for all a in expr1. This will work in most cases.
Like inequalitySubstitute we're throwing away some information
*/
-constraint inequalitySubstituteUnsound (constraint c, constraintList p)
+static constraint inequalitySubstituteUnsound (/*@returned@*/ constraint c, constraintList p)
{
DPRINTF (( message ("Doing inequalitySubstituteUnsound " ) ));
if ( ( el->ar == LTE) || (el->ar == LT) )
// if (!constraint_conflict (c, el) )
{
- constraint temp;
+ // constraint temp;
constraintExpr temp2;
- temp = constraint_copy(el);
+ //temp = constraint_copy(el);
// temp = constraint_adjust(temp, c);
temp2 = constraintExpr_copy (el->expr);
constraintExpr_print (temp2) ) ));
c->lexpr = constraintExpr_searchandreplace (c->lexpr, el->lexpr, temp2);
+ constraintExpr_free(temp2);
}
}
end_constraintList_elements;
return c;
}
-/*@only@*/ constraint substitute (constraint c, constraintList p)
+/*@only@*/ constraint constraint_substitute (/*@observer@*/ /*@temp@*/ constraint c, constraintList p)
{
constraint ret;
{
constraint temp;
+
temp = constraint_copy(el);
temp = constraint_adjust(temp, ret);
ret = constraint_searchandreplace (ret, temp->lexpr, temp->expr);
DPRINTF(( message ("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);
return ret;
}
+
+/*@only@*/ constraintList constraintList_substituteFreeTarget (/*@only@*/ constraintList target, /*@observer@*/ constraintList subList)
+{
+constraintList ret;
+
+ret = constraintList_substitute (target, subList);
+
+constraintList_free(target);
+
+return ret;
+}
+
/* we try to do substitutions on each constraint in target using the constraint in sublist*/
-constraintList constraintList_substitute (constraintList target, constraintList subList)
+/*@only@*/ constraintList constraintList_substitute (constraintList target,/*2observer@*/ constraintList subList)
{
constraintList ret;
constraintList_elements(target, el)
{
constraint temp;
- #warning make sure this side effect is the right things
- el = substitute(el, subList);
- temp = constraint_copy (el);
+ //drl possible problem : warning make sure that a side effect is not expected
+
+ temp = constraint_substitute(el, subList);
ret = constraintList_add (ret, temp);
}
end_constraintList_elements;
-#warning mem leak
- return ret;
-}
-
-constraint constraint_solveWithFlag (constraint c, bool *b)
-{
- *b = FALSE;
- if (c->lexpr->kind == binaryexpr)
- {
- *b = TRUE;
- 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) ) ) );
- }
- return c;
+ return ret;
}
-constraint constraint_solve (constraint c)
+static constraint constraint_solve (/*@returned@*/ constraint c)
{
DPRINTF( (message ("Solving %s\n", constraint_print(c) ) ) );
c->expr = constraintExpr_solveBinaryExpr (c->lexpr, c->expr);
constraint constraint_simplify ( /*@returned@*/ constraint c)
{
+
+ DPRINTF(( message("constraint_simplify on %q ", constraint_print(c) ) ));
+
+ if (constraint_tooDeep(c))
+ {
+ DPRINTF(( message("constraint_simplify: constraint to complex aborting %q ", constraint_print(c) ) ));
+ return c;
+
+ }
+
c->lexpr = constraintExpr_simplify (c->lexpr);
c->expr = constraintExpr_simplify (c->expr);
- if (c->lexpr->kind == binaryexpr)
+ if (constraintExpr_isBinaryExpr (c->lexpr) )
{
c = constraint_solve (c);
/*I don't think this will be an infinate loop*/
c = constraint_simplify(c);
}
+
+ DPRINTF(( message("constraint_simplify returning %q ", constraint_print(c) ) ));
+
return c;
}
andersk / splint.git / blobdiff