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| author | Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> | 2019-02-21 02:58:00 +0000 |
|---|---|---|
| committer | Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> | 2019-02-21 02:58:00 +0000 |
| commit | 42e229e13082a5dfb39aa43b40a8d7c75df92770 (patch) | |
| tree | 1be42eae845fbe619b9b552aa37c91c6b2f85ab2 /llvm/lib/Target | |
| parent | 500606f270ffcbdc199ee581fb2147700a7bb139 (diff) | |
| download | bcm5719-llvm-42e229e13082a5dfb39aa43b40a8d7c75df92770.tar.gz bcm5719-llvm-42e229e13082a5dfb39aa43b40a8d7c75df92770.zip | |
[AMDGPU] fix commuted case of sub combine
Differential Revision: https://reviews.llvm.org/D58481
llvm-svn: 354543
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/SIISelLowering.cpp | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp index 44edd6d1295..96eb619497b 100644 --- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp +++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp @@ -8616,14 +8616,10 @@ SDValue SITargetLowering::performSubCombine(SDNode *N, SDValue LHS = N->getOperand(0); SDValue RHS = N->getOperand(1); - unsigned Opc = LHS.getOpcode(); - if (Opc != ISD::SUBCARRY) - std::swap(RHS, LHS); - if (LHS.getOpcode() == ISD::SUBCARRY) { // sub (subcarry x, 0, cc), y => subcarry x, y, cc auto C = dyn_cast<ConstantSDNode>(LHS.getOperand(1)); - if (!C || C->getZExtValue() != 0) + if (!C || !C->isNullValue()) return SDValue(); SDValue Args[] = { LHS.getOperand(0), RHS, LHS.getOperand(2) }; return DAG.getNode(ISD::SUBCARRY, SDLoc(N), LHS->getVTList(), Args); |
