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Teach ValueTracking about address spaces

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188140 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2013-08-10 17:34:08 +00:00
parent 6e4dbcd115
commit d080fb103f
1 changed files with 12 additions and 8 deletions
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20
lib/Analysis/ValueTracking.cpp
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@ -39,8 +39,8 @@ const unsigned MaxDepth = 6;
static unsigned getBitWidth(Type *Ty, const DataLayout *TD) {
if (unsigned BitWidth = Ty->getScalarSizeInBits())
return BitWidth;
assert(isa<PointerType>(Ty) && "Expected a pointer type!");
return TD ? TD->getPointerSizeInBits() : 0;
return TD ? TD->getPointerTypeSizeInBits(Ty) : 0;
}
static void ComputeMaskedBitsAddSub(bool Add, Value *Op0, Value *Op1, bool NSW,
@ -1704,20 +1704,24 @@ Value *llvm::FindInsertedValue(Value *V, ArrayRef<unsigned> idx_range,
/// it can be expressed as a base pointer plus a constant offset. Return the
/// base and offset to the caller.
Value *llvm::GetPointerBaseWithConstantOffset(Value *Ptr, int64_t &Offset,
const DataLayout *TD) {
const DataLayout *DL) {
// Without DataLayout, conservatively assume 64-bit offsets, which is
// the widest we support.
unsigned BitWidth = TD ? TD->getPointerSizeInBits() : 64;
unsigned BitWidth = DL ? DL->getPointerTypeSizeInBits(Ptr->getType()) : 64;
APInt ByteOffset(BitWidth, 0);
while (1) {
if (Ptr->getType()->isVectorTy())
break;
if (GEPOperator *GEP = dyn_cast<GEPOperator>(Ptr)) {
APInt GEPOffset(BitWidth, 0);
if (TD && !GEP->accumulateConstantOffset(*TD, GEPOffset))
break;
ByteOffset += GEPOffset;
if (DL) {
APInt GEPOffset(BitWidth, 0);
if (!GEP->accumulateConstantOffset(*DL, GEPOffset))
break;
ByteOffset += GEPOffset;
}
Ptr = GEP->getPointerOperand();
} else if (Operator::getOpcode(Ptr) == Instruction::BitCast) {
Ptr = cast<Operator>(Ptr)->getOperand(0);