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conservatively say that volatile stores read memory. 

llvm-svn: 50872
This commit is contained in:
Chris Lattner 2008-05-08 21:58:49 +00:00
parent 93cea9fd18
commit 954907aa6f
1 changed files with 3 additions and 2 deletions
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5
llvm/lib/VMCore/Instruction.cpp
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@ -226,13 +226,14 @@ bool Instruction::mayReadFromMemory() const {
default: return false;
case Instruction::Free:
case Instruction::VAArg:
case Instruction::Load:
return true;
case Instruction::Call:
return !cast<CallInst>(this)->doesNotAccessMemory();
case Instruction::Invoke:
return !cast<InvokeInst>(this)->doesNotAccessMemory();
case Instruction::Load:
return true;
case Instruction::Store:
return cast<StoreInst>(this)->isVolatile();
}
}