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Teach MergeFunctions about address spaces

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194342 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault
2013-11-10 01:44:37 +00:00
parent b831e13387
commit 432bdf6571
4 changed files with 112 additions and 11 deletions
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30
lib/Transforms/IPO/MergeFunctions.cpp
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@ -214,9 +214,12 @@ bool FunctionComparator::isEquivalentType(Type *Ty1, Type *Ty2) const {
return true;
if (Ty1->getTypeID() != Ty2->getTypeID()) {
if (TD) {
LLVMContext &Ctx = Ty1->getContext();
if (isa<PointerType>(Ty1) && Ty2 == TD->getIntPtrType(Ctx)) return true;
if (isa<PointerType>(Ty2) && Ty1 == TD->getIntPtrType(Ctx)) return true;
if (isa<PointerType>(Ty1) && Ty2 == TD->getIntPtrType(Ty1))
return true;
if (isa<PointerType>(Ty2) && Ty1 == TD->getIntPtrType(Ty2))
return true;
}
return false;
}
@ -352,14 +355,19 @@ bool FunctionComparator::isEquivalentOperation(const Instruction *I1,
// Determine whether two GEP operations perform the same underlying arithmetic.
bool FunctionComparator::isEquivalentGEP(const GEPOperator *GEP1,
const GEPOperator *GEP2) {
// When we have target data, we can reduce the GEP down to the value in bytes
// added to the address.
unsigned BitWidth = TD ? TD->getPointerSizeInBits() : 1;
APInt Offset1(BitWidth, 0), Offset2(BitWidth, 0);
if (TD &&
GEP1->accumulateConstantOffset(*TD, Offset1) &&
GEP2->accumulateConstantOffset(*TD, Offset2)) {
return Offset1 == Offset2;
unsigned AS = GEP1->getPointerAddressSpace();
if (AS != GEP2->getPointerAddressSpace())
return false;
if (TD) {
// When we have target data, we can reduce the GEP down to the value in bytes
// added to the address.
unsigned BitWidth = TD ? TD->getPointerSizeInBits(AS) : 1;
APInt Offset1(BitWidth, 0), Offset2(BitWidth, 0);
if (GEP1->accumulateConstantOffset(*TD, Offset1) &&
GEP2->accumulateConstantOffset(*TD, Offset2)) {
return Offset1 == Offset2;
}
}
if (GEP1->getPointerOperand()->getType() !=