diff options
Diffstat (limited to 'llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp b/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp index aed325c..0c97741 100644 --- a/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp +++ b/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp @@ -224,13 +224,12 @@ bool AMDGPUInstructionSelector::selectCOPY_SCC_VCC(MachineInstr &I) const { Register VCCReg = I.getOperand(1).getReg(); MachineInstr *Cmp; - if (STI.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) { + // Set SCC as a side effect with S_CMP or S_OR. + if (STI.hasScalarCompareEq64()) { unsigned CmpOpc = STI.isWave64() ? AMDGPU::S_CMP_LG_U64 : AMDGPU::S_CMP_LG_U32; Cmp = BuildMI(*BB, &I, DL, TII.get(CmpOpc)).addReg(VCCReg).addImm(0); } else { - // For gfx7 and earlier, S_CMP_LG_U64 doesn't exist, so we use S_OR_B64 - // which sets SCC as a side effect. Register DeadDst = MRI->createVirtualRegister(&AMDGPU::SReg_64RegClass); Cmp = BuildMI(*BB, &I, DL, TII.get(AMDGPU::S_OR_B64), DeadDst) .addReg(VCCReg) |