From 1df59ef1aa271a4e33cf8973e14bcaf55c585231 Mon Sep 17 00:00:00 2001 From: Matt Arsenault Date: Thu, 3 Oct 2013 18:15:57 +0000 Subject: Make gep i8* X, -(ptrtoint Y) transform work with address spaces git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191920 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/InstCombine/InstructionCombining.cpp | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) (limited to 'lib/Transforms') diff --git a/lib/Transforms/InstCombine/InstructionCombining.cpp b/lib/Transforms/InstCombine/InstructionCombining.cpp index fcb26ab82a..27f1a3eb69 100644 --- a/lib/Transforms/InstCombine/InstructionCombining.cpp +++ b/lib/Transforms/InstCombine/InstructionCombining.cpp @@ -1186,14 +1186,16 @@ Instruction *InstCombiner::visitGetElementPtrInst(GetElementPtrInst &GEP) { // The GEP pattern is emitted by the SCEV expander for certain kinds of // pointer arithmetic. if (TD && GEP.getNumIndices() == 1 && - match(GEP.getOperand(1), m_Neg(m_PtrToInt(m_Value()))) && - GEP.getType() == Builder->getInt8PtrTy() && - GEP.getOperand(1)->getType()->getScalarSizeInBits() == - TD->getPointerSizeInBits(GEP.getPointerAddressSpace())) { - Operator *Index = cast(GEP.getOperand(1)); - Value *PtrToInt = Builder->CreatePtrToInt(PtrOp, Index->getType()); - Value *NewSub = Builder->CreateSub(PtrToInt, Index->getOperand(1)); - return CastInst::Create(Instruction::IntToPtr, NewSub, GEP.getType()); + match(GEP.getOperand(1), m_Neg(m_PtrToInt(m_Value())))) { + unsigned AS = GEP.getPointerAddressSpace(); + if (GEP.getType() == Builder->getInt8PtrTy(AS) && + GEP.getOperand(1)->getType()->getScalarSizeInBits() == + TD->getPointerSizeInBits(AS)) { + Operator *Index = cast(GEP.getOperand(1)); + Value *PtrToInt = Builder->CreatePtrToInt(PtrOp, Index->getType()); + Value *NewSub = Builder->CreateSub(PtrToInt, Index->getOperand(1)); + return CastInst::Create(Instruction::IntToPtr, NewSub, GEP.getType()); + } } // Handle gep(bitcast x) and gep(gep x, 0, 0, 0). -- cgit v1.2.3