diff options
Diffstat (limited to 'llvm/lib/Target/AMDGPU/SIISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/SIISelLowering.cpp | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp index da60a0f7bdc..a0184bfefd0 100644 --- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp +++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp @@ -610,6 +610,13 @@ bool SITargetLowering::isNoopAddrSpaceCast(unsigned SrcAS, return isFlatGlobalAddrSpace(SrcAS) && isFlatGlobalAddrSpace(DestAS); } +bool SITargetLowering::isMemOpHasNoClobberedMemOperand(const SDNode *N) const { + const MemSDNode *MemNode = cast<MemSDNode>(N); + const Value *Ptr = MemNode->getMemOperand()->getValue(); + const Instruction *I = dyn_cast<Instruction>(Ptr); + return I && I->getMetadata("amdgpu.noclobber"); +} + bool SITargetLowering::isCheapAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const { // Flat -> private/local is a simple truncate. @@ -2773,11 +2780,19 @@ SDValue SITargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const { if (isMemOpUniform(Load)) return SDValue(); // Non-uniform loads will be selected to MUBUF instructions, so they - // have the same legalization requires ments as global and private + // have the same legalization requirements as global and private // loads. // LLVM_FALLTHROUGH; - case AMDGPUAS::GLOBAL_ADDRESS: + case AMDGPUAS::GLOBAL_ADDRESS: { + if (isMemOpUniform(Load) && isMemOpHasNoClobberedMemOperand(Load)) + return SDValue(); + // Non-uniform loads will be selected to MUBUF instructions, so they + // have the same legalization requirements as global and private + // loads. + // + } + LLVM_FALLTHROUGH; case AMDGPUAS::FLAT_ADDRESS: if (NumElements > 4) return SplitVectorLoad(Op, DAG); |
