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| author | Alexander Timofeev <Alexander.Timofeev@amd.com> | 2019-08-21 15:15:04 +0000 |
|---|---|---|
| committer | Alexander Timofeev <Alexander.Timofeev@amd.com> | 2019-08-21 15:15:04 +0000 |
| commit | 78347c979e10db22c49921d2c9587be7c896171d (patch) | |
| tree | 2b95699f636f84de98721b97df0d5900d0bc133d /llvm/lib/Target/AMDGPU/SIInstrInfo.cpp | |
| parent | 1c18a9cb9eef141ccd3482e351811a98a7f61844 (diff) | |
| download | bcm5719-llvm-78347c979e10db22c49921d2c9587be7c896171d.tar.gz bcm5719-llvm-78347c979e10db22c49921d2c9587be7c896171d.zip | |
[AMDGPU] Prevent VGPR copies from moving across the EXEC mask definitions
Differential Revision: https://reviews.llvm.org/D63731
Reviewers: qcolombet, rampitec
llvm-svn: 369532
Diffstat (limited to 'llvm/lib/Target/AMDGPU/SIInstrInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/SIInstrInfo.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp index ea877272826..a623fedde1e 100644 --- a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp +++ b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp @@ -4200,6 +4200,15 @@ void SIInstrInfo::legalizeGenericOperand(MachineBasicBlock &InsertMBB, // Try to eliminate the copy if it is copying an immediate value. if (Def->isMoveImmediate()) FoldImmediate(*Copy, *Def, OpReg, &MRI); + + bool ImpDef = Def->isImplicitDef(); + while (!ImpDef && Def && Def->isCopy()) { + Def = MRI.getUniqueVRegDef(Def->getOperand(1).getReg()); + ImpDef = Def && Def->isImplicitDef(); + } + if (!RI.isSGPRClass(DstRC) && !Copy->readsRegister(AMDGPU::EXEC, &RI) && + !ImpDef) + Copy->addOperand(MachineOperand::CreateReg(AMDGPU::EXEC, false, true)); } // Emit the actual waterfall loop, executing the wrapped instruction for each |
