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[analyzer] Use makeZeroVal in RegionStore's lazy evaluation of statics. 

No functionality change.

llvm-svn: 175025
This commit is contained in:
Jordan Rose 2013-02-13 03:11:01 +00:00
parent bc67170056
commit ff0dd946b1
1 changed files with 19 additions and 23 deletions
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42
clang/lib/StaticAnalyzer/Core/RegionStore.cpp
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@ -1514,33 +1514,29 @@ SVal RegionStoreManager::getBindingForVar(RegionBindingsConstRef B,
return svalBuilder.getRegionValueSymbolVal(R);
if (isa<GlobalsSpaceRegion>(MS)) {
if (isa<NonStaticGlobalSpaceRegion>(MS)) {
// Is 'VD' declared constant? If so, retrieve the constant value.
QualType CT = Ctx.getCanonicalType(T);
if (CT.isConstQualified()) {
const Expr *Init = VD->getInit();
// Do the null check first, as we want to call 'IgnoreParenCasts'.
if (Init)
if (const IntegerLiteral *IL =
dyn_cast<IntegerLiteral>(Init->IgnoreParenCasts())) {
const nonloc::ConcreteInt &V = svalBuilder.makeIntVal(IL);
return svalBuilder.evalCast(V, Init->getType(), IL->getType());
}
// Function-scoped static variables are default-initialized to 0; if they
// have an initializer, it would have been processed by now.
if (isa<StaticGlobalSpaceRegion>(MS))
return svalBuilder.makeZeroVal(T);
// Other globals
// Is 'VD' declared constant? If so, retrieve the constant value.
QualType CT = Ctx.getCanonicalType(T);
if (CT.isConstQualified()) {
if (const Expr *Init = VD->getInit()) {
if (const IntegerLiteral *IL =
dyn_cast<IntegerLiteral>(Init->IgnoreParenCasts())) {
const nonloc::ConcreteInt &V = svalBuilder.makeIntVal(IL);
return svalBuilder.evalCast(V, Init->getType(), IL->getType());
}
}
if (const Optional<SVal> &V
= getBindingForDerivedDefaultValue(B, MS, R, CT))
return V.getValue();
return svalBuilder.getRegionValueSymbolVal(R);
}
if (T->isIntegerType())
return svalBuilder.makeIntVal(0, T);
if (T->isPointerType())
return svalBuilder.makeNull();
if (const Optional<SVal> &V
= getBindingForDerivedDefaultValue(B, MS, R, CT))
return V.getValue();
return UnknownVal();
return svalBuilder.getRegionValueSymbolVal(R);
}
return UndefinedVal();