diff options
Diffstat (limited to 'llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp index a1b9198f945..9823dd7709d 100644 --- a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp +++ b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp @@ -667,6 +667,18 @@ bool AMDGPUTargetLowering::shouldReduceLoadWidth(SDNode *N, EVT OldVT = N->getValueType(0); unsigned OldSize = OldVT.getStoreSizeInBits(); + MemSDNode *MN = cast<MemSDNode>(N); + unsigned AS = MN->getAddressSpace(); + // Do not shrink an aligned scalar load to sub-dword. + // Scalar engine cannot do sub-dword loads. + if (OldSize >= 32 && NewSize < 32 && MN->getAlignment() >= 4 && + (AS == AMDGPUAS::CONSTANT_ADDRESS || + AS == AMDGPUAS::CONSTANT_ADDRESS_32BIT || + (isa<LoadSDNode>(N) && + AS == AMDGPUAS::GLOBAL_ADDRESS && MN->isInvariant())) && + AMDGPUInstrInfo::isUniformMMO(MN->getMemOperand())) + return false; + // Don't produce extloads from sub 32-bit types. SI doesn't have scalar // extloads, so doing one requires using a buffer_load. In cases where we // still couldn't use a scalar load, using the wider load shouldn't really |
