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| author | Matt Arsenault <Matthew.Arsenault@amd.com> | 2019-10-20 17:44:17 +0000 |
|---|---|---|
| committer | Matt Arsenault <Matthew.Arsenault@amd.com> | 2019-10-20 17:44:17 +0000 |
| commit | e5be543a55986e353d40d79702eef5cff3934348 (patch) | |
| tree | a814a2a17aeabdb1314b14297ddb0da5779ffa42 /llvm/lib/Target | |
| parent | 7cd57dcd5b716dd1dab446974abd4c51d01038a7 (diff) | |
| download | bcm5719-llvm-e5be543a55986e353d40d79702eef5cff3934348.tar.gz bcm5719-llvm-e5be543a55986e353d40d79702eef5cff3934348.zip | |
AMDGPU: Increase vcc liveness scan threshold
Avoids a test regression in a future patch. Also add debug printing on
this case, so I waste less time debugging folds in the future.
llvm-svn: 375367
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/SIFoldOperands.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp b/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp index 698bcbdb983..bdbcc658b88 100644 --- a/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp +++ b/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp @@ -239,9 +239,11 @@ static bool updateOperand(FoldCandidate &Fold, if ((Fold.isImm() || Fold.isFI() || Fold.isGlobal()) && Fold.needsShrink()) { MachineBasicBlock *MBB = MI->getParent(); - auto Liveness = MBB->computeRegisterLiveness(&TRI, AMDGPU::VCC, MI); - if (Liveness != MachineBasicBlock::LQR_Dead) + auto Liveness = MBB->computeRegisterLiveness(&TRI, AMDGPU::VCC, MI, 16); + if (Liveness != MachineBasicBlock::LQR_Dead) { + LLVM_DEBUG(dbgs() << "Not shrinking " << MI << " due to vcc liveness\n"); return false; + } MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo(); int Op32 = Fold.getShrinkOpcode(); |
