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Fix Transforms/InstCombine/2007-05-14-Crash.ll

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37057 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-05-15 00:16:00 +00:00
parent 24bb504e15
commit 6b6aef8efc
1 changed files with 16 additions and 7 deletions
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23
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -6454,16 +6454,25 @@ Instruction *InstCombiner::commonPointerCastTransforms(CastInst &CI) {
while (Offset) { while (Offset) {
if (const StructType *STy = dyn_cast<StructType>(GEPIdxTy)) { if (const StructType *STy = dyn_cast<StructType>(GEPIdxTy)) {
const StructLayout *SL = TD->getStructLayout(STy); const StructLayout *SL = TD->getStructLayout(STy);
unsigned Elt = SL->getElementContainingOffset(Offset); if (Offset < (int64_t)SL->getSizeInBytes()) {
NewIndices.push_back(ConstantInt::get(Type::Int32Ty, Elt)); unsigned Elt = SL->getElementContainingOffset(Offset);
NewIndices.push_back(ConstantInt::get(Type::Int32Ty, Elt));
Offset -= SL->getElementOffset(Elt); Offset -= SL->getElementOffset(Elt);
GEPIdxTy = STy->getElementType(Elt); GEPIdxTy = STy->getElementType(Elt);
} else {
// Otherwise, we can't index into this, bail out.
Offset = 0;
OrigBase = 0;
}
} else if (isa<ArrayType>(GEPIdxTy) || isa<VectorType>(GEPIdxTy)) { } else if (isa<ArrayType>(GEPIdxTy) || isa<VectorType>(GEPIdxTy)) {
const SequentialType *STy = cast<SequentialType>(GEPIdxTy); const SequentialType *STy = cast<SequentialType>(GEPIdxTy);
uint64_t EltSize = TD->getTypeSize(STy->getElementType()); if (uint64_t EltSize = TD->getTypeSize(STy->getElementType())) {
NewIndices.push_back(ConstantInt::get(IntPtrTy, Offset/EltSize)); NewIndices.push_back(ConstantInt::get(IntPtrTy,Offset/EltSize));
Offset %= EltSize; Offset %= EltSize;
} else {
NewIndices.push_back(ConstantInt::get(IntPtrTy, 0));
}
GEPIdxTy = STy->getElementType(); GEPIdxTy = STy->getElementType();
} else { } else {
// Otherwise, we can't index into this, bail out. // Otherwise, we can't index into this, bail out.