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Fix SimplifyLibcalls and ValueTracking to check mayBeOverridden

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before performing optimizations based on constant string values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79384 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2009-08-19 00:11:12 +00:00
parent 2c9489d6e9
commit 107f41fad5
3 changed files with 30 additions and 2 deletions
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3
lib/Analysis/ValueTracking.cpp
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@ -1061,7 +1061,8 @@ bool llvm::GetConstantStringInfo(Value *V, std::string &Str, uint64_t Offset,
// variable that is a constant and is initialized. The referenced constant
// initializer is the array that we'll use for optimization.
GlobalVariable* GV = dyn_cast<GlobalVariable>(V);
if (!GV || !GV->isConstant() || !GV->hasInitializer())
if (!GV || !GV->isConstant() || !GV->hasInitializer() ||
GV->mayBeOverridden())
return false;
Constant *GlobalInit = GV->getInitializer();