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Add addrspacecast instruction.

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Patch by Michele Scandale!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194760 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault
2013-11-15 01:34:59 +00:00
parent 2b7fef0ad4
commit 59d3ae6cdc
51 changed files with 589 additions and 230 deletions
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12
lib/Analysis/ConstantFolding.cpp
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@ -663,7 +663,7 @@ static Constant* StripPtrCastKeepAS(Constant* Ptr) {
if (NewPtrTy->getAddressSpace() != OldPtrTy->getAddressSpace()) {
NewPtrTy = NewPtrTy->getElementType()->getPointerTo(
OldPtrTy->getAddressSpace());
Ptr = ConstantExpr::getBitCast(Ptr, NewPtrTy);
Ptr = ConstantExpr::getPointerCast(Ptr, NewPtrTy);
}
return Ptr;
}
@ -995,8 +995,9 @@ Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, Type *DestTy,
return ConstantExpr::getCast(Opcode, Ops[0], DestTy);
case Instruction::IntToPtr:
// If the input is a ptrtoint, turn the pair into a ptr to ptr bitcast if
// the int size is >= the ptr size. This requires knowing the width of a
// pointer, so it can't be done in ConstantExpr::getCast.
// the int size is >= the ptr size and the address spaces are the same.
// This requires knowing the width of a pointer, so it can't be done in
// ConstantExpr::getCast.
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Ops[0])) {
if (TD && CE->getOpcode() == Instruction::PtrToInt) {
Constant *SrcPtr = CE->getOperand(0);
@ -1004,8 +1005,8 @@ Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, Type *DestTy,
unsigned MidIntSize = CE->getType()->getScalarSizeInBits();
if (MidIntSize >= SrcPtrSize) {
unsigned DestPtrSize = TD->getPointerTypeSizeInBits(DestTy);
if (SrcPtrSize == DestPtrSize)
unsigned SrcAS = SrcPtr->getType()->getPointerAddressSpace();
if (SrcAS == DestTy->getPointerAddressSpace())
return FoldBitCast(CE->getOperand(0), DestTy, *TD);
}
}
@ -1021,6 +1022,7 @@ Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, Type *DestTy,
case Instruction::SIToFP:
case Instruction::FPToUI:
case Instruction::FPToSI:
case Instruction::AddrSpaceCast:
return ConstantExpr::getCast(Opcode, Ops[0], DestTy);
case Instruction::BitCast:
if (TD)