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InstCombine: Fix an edge case where constant icmps could sneak into ConstantFoldInstOperands and crash.

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Have to refactor the ConstantFolder interface one day to define bugs like this away. Fixes PR14131.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166374 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2012-10-20 08:43:52 +00:00
parent bf8772ed2c
commit 82a1833865
2 changed files with 38 additions and 0 deletions
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lib/Transforms/InstCombine/InstCombineSelect.cpp
+4
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@@ -333,6 +333,10 @@ static Value *SimplifyWithOpReplaced(Value *V, Value *Op, Value *RepOp,
// All operands were constants, fold it.
if (ConstOps.size() == I->getNumOperands()) {
if (CmpInst *C = dyn_cast<CmpInst>(I))
return ConstantFoldCompareInstOperands(C->getPredicate(), ConstOps[0],
ConstOps[1], TD, TLI);
if (LoadInst *LI = dyn_cast<LoadInst>(I))
if (!LI->isVolatile())
return ConstantFoldLoadFromConstPtr(ConstOps[0], TD);