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Force sign-extension for uint array indexes from 32-bit to 64-bits

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since uint is not normally sign-extended when casting to uint64_t.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3489 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve 2002-08-23 02:55:51 +00:00
parent 3bb8ad27a8
commit 69f3b72594
1 changed files with 6 additions and 1 deletions
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7
lib/Target/TargetData.cpp
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@ -164,8 +164,13 @@ uint64_t TargetData::getIndexedOffset(const Type *ptrTy,
// Get the array index and the size of each array element.
// Both must be known constants, or this will fail.
unsigned arrayIdx = cast<ConstantUInt>(Idx[CurIDX])->getValue();
// Also, the arrayIdx needs to be sign-extended from uint
// to the machine register size if the reg. size > sizeof(uint).
uint64_t elementSize = this->getTypeSize(Ty);
uint64_t arrayIdx = cast<ConstantUInt>(Idx[CurIDX])->getValue();
if (getIntegerRegize() > sizeof(uint)) {
arrayIdx = (uint64_t) (int) arrayIdx; // sign-extend from 32 to 64 bits
}
Result += arrayIdx * elementSize;
} else if (const StructType *STy = dyn_cast<const StructType>(Ty)) {