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Type sizes and fields offsets inside structs are unsigned. This is a highly

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theoretical fix since it only matters for types with >= 2^63 bits (!) and also
only matters if pointers have more than 64 bits, which is not supported anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152831 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2012-03-15 20:14:42 +00:00
parent 45b5f88938
commit f72e0ca715
1 changed files with 2 additions and 4 deletions
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6
lib/Analysis/InstructionSimplify.cpp
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@ -673,13 +673,11 @@ static bool accumulateGEPOffset(const TargetData &TD, GEPOperator *GEP,
if (StructType *STy = dyn_cast<StructType>(*GTI)) {
unsigned ElementIdx = OpC->getZExtValue();
const StructLayout *SL = TD.getStructLayout(STy);
Offset += APInt(IntPtrWidth, SL->getElementOffset(ElementIdx),
/*isSigned=*/true);
Offset += APInt(IntPtrWidth, SL->getElementOffset(ElementIdx));
continue;
}
APInt TypeSize(IntPtrWidth, TD.getTypeAllocSize(GTI.getIndexedType()),
/*isSigned=*/true);
APInt TypeSize(IntPtrWidth, TD.getTypeAllocSize(GTI.getIndexedType()));
Offset += OpC->getValue().sextOrTrunc(IntPtrWidth) * TypeSize;
}
return true;