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Don't crash owhen ComputeLoadResult can't compute the result of the load.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132290 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2011-05-29 19:33:36 +00:00
parent 1f237b0027
commit bcb85087a7
1 changed files with 1 additions and 1 deletions
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2
lib/Transforms/IPO/GlobalOpt.cpp
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@ -2444,7 +2444,7 @@ static bool EvaluateFunction(Function *F, Constant *&RetVal,
Constant *Val = getVal(Values, MSI->getValue()); Constant *Val = getVal(Values, MSI->getValue());
Constant *DestVal = ComputeLoadResult(getVal(Values, Ptr), Constant *DestVal = ComputeLoadResult(getVal(Values, Ptr),
MutatedMemory); MutatedMemory);
if (Val->isNullValue() && DestVal->isNullValue()) { if (Val->isNullValue() && DestVal && DestVal->isNullValue()) {
// This memset is a no-op. // This memset is a no-op.
++CurInst; ++CurInst;
continue; continue;