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fix PR9017, a bug where we'd assert when promoting in unreachable

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124100 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2011-01-24 03:29:07 +00:00
parent 51e62f0f73
commit 867be59684
2 changed files with 23 additions and 0 deletions
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3
lib/Transforms/Utils/SSAUpdater.cpp
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@ -469,6 +469,9 @@ run(const SmallVectorImpl<Instruction*> &Insts) const {
LoadInst *ALoad = LiveInLoads[i];
Value *NewVal = SSA.GetValueInMiddleOfBlock(ALoad->getParent());
replaceLoadWithValue(ALoad, NewVal);
// Avoid assertions in unreachable code.
if (NewVal == ALoad) NewVal = UndefValue::get(NewVal->getType());
ALoad->replaceAllUsesWith(NewVal);
ReplacedLoads[ALoad] = NewVal;
}