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Fix crash from r158529 on Bullet.

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Dynamic GEPs created by SROA needed to insert extra "i32 0"
operands to index through structs and arrays to get to the
vector being indexed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158590 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Pete Cooper
2012-06-16 01:43:26 +00:00
parent e5c7bc65c3
commit 06e6c385cb
2 changed files with 65 additions and 1 deletions
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11
lib/Transforms/Scalar/ScalarReplAggregates.cpp
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@ -2011,8 +2011,17 @@ void SROA::RewriteGEP(GetElementPtrInst *GEPI, AllocaInst *AI, uint64_t Offset,
uint64_t EltIdx = FindElementAndOffset(T, EltOffset, IdxTy);
NewArgs.push_back(ConstantInt::get(IdxTy, EltIdx));
}
if (NonConstantIdx)
if (NonConstantIdx) {
Type* GepTy = T;
// This GEP has a dynamic index. We need to add "i32 0" to index through
// any structs or arrays in the original type until we get to the vector
// to index.
while (!isa<VectorType>(GepTy)) {
NewArgs.push_back(Constant::getNullValue(i32Ty));
GepTy = cast<CompositeType>(GepTy)->getTypeAtIndex(0U);
}
NewArgs.push_back(NonConstantIdx);
}
Instruction *Val = NewElts[Idx];
if (NewArgs.size() > 1) {
Val = GetElementPtrInst::CreateInBounds(Val, NewArgs, "", GEPI);