diff options
| author | Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> | 2019-01-09 02:24:22 +0000 |
|---|---|---|
| committer | Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> | 2019-01-09 02:24:22 +0000 |
| commit | da5521cabed36ca3675f5230ed1ef1b5574acb88 (patch) | |
| tree | 2b30313e0b8ad2aa81274f4d179eef8efd9caf66 /llvm/lib | |
| parent | bd8b20097f5003d7d8988a6d6314026bcce91b50 (diff) | |
Remove check for single use in ShrinkDemandedConstant
This removes check for single use from general ShrinkDemandedConstant
to the BE because of the AArch64 regression after D56289/rL350475.
After several hours of experiments I did not come up with a testcase
failing on any other targets if check is not performed.
Moreover, direct call to ShrinkDemandedConstant is not really needed
and superceed by SimplifyDemandedBits.
Differential Revision: https://reviews.llvm.org/D56406
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | 3 | ||||
| -rw-r--r-- | llvm/lib/Target/AMDGPU/SIISelLowering.cpp | 3 |
2 files changed, 1 insertions, 5 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 2851dbb21e8..ca0db5cd0ab 100644 --- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -350,9 +350,6 @@ bool TargetLowering::ShrinkDemandedConstant(SDValue Op, const APInt &Demanded, SDLoc DL(Op); unsigned Opcode = Op.getOpcode(); - if (!Op.hasOneUse()) - return false; - // Do target-specific constant optimization. if (targetShrinkDemandedConstant(Op, Demanded, TLO)) return TLO.New.getNode(); diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp index 894806b9faa..0e2e3b04d87 100644 --- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp +++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp @@ -8586,8 +8586,7 @@ SDValue SITargetLowering::performCvtF32UByteNCombine(SDNode *N, TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(), !DCI.isBeforeLegalizeOps()); const TargetLowering &TLI = DAG.getTargetLoweringInfo(); - if (TLI.ShrinkDemandedConstant(Src, Demanded, TLO) || - TLI.SimplifyDemandedBits(Src, Demanded, Known, TLO)) { + if (TLI.SimplifyDemandedBits(Src, Demanded, Known, TLO)) { DCI.CommitTargetLoweringOpt(TLO); } |