diff options
Diffstat (limited to 'llvm/lib/Target/AMDGPU/SIInstrInfo.cpp')
-rw-r--r-- | llvm/lib/Target/AMDGPU/SIInstrInfo.cpp | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp index 4456f68fad7..c8410d27301 100644 --- a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp +++ b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp @@ -6410,3 +6410,31 @@ bool llvm::execMayBeModifiedBeforeAnyUse(const MachineRegisterInfo &MRI, return true; } } + +MachineInstr *SIInstrInfo::createPHIDestinationCopy( + MachineBasicBlock &MBB, MachineBasicBlock::iterator LastPHIIt, + const DebugLoc &DL, Register Src, Register Dst) const { + auto Cur = MBB.begin(); + do { + if (!Cur->isPHI() && Cur->readsRegister(Dst)) + return BuildMI(MBB, Cur, DL, get(TargetOpcode::COPY), Dst).addReg(Src); + ++Cur; + } while (Cur != MBB.end() && Cur != LastPHIIt); + + return TargetInstrInfo::createPHIDestinationCopy(MBB, LastPHIIt, DL, Src, + Dst); +} + +MachineInstr *SIInstrInfo::createPHISourceCopy( + MachineBasicBlock &MBB, MachineBasicBlock::iterator InsPt, + const DebugLoc &DL, Register Src, Register SrcSubReg, Register Dst) const { + if (InsPt != MBB.end() && InsPt->isPseudo() && InsPt->definesRegister(Src)) { + InsPt++; + return BuildMI(MBB, InsPt, InsPt->getDebugLoc(), get(TargetOpcode::COPY), + Dst) + .addReg(Src, 0, SrcSubReg) + .addReg(AMDGPU::EXEC, RegState::Implicit); + } + return TargetInstrInfo::createPHISourceCopy(MBB, InsPt, DL, Src, SrcSubReg, + Dst); +} |