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| author | Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> | 2019-01-05 19:20:00 +0000 |
|---|---|---|
| committer | Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> | 2019-01-05 19:20:00 +0000 |
| commit | 35a3a3bd11ac5736fed1a9de052f172c37d989d9 (patch) | |
| tree | f34123da70dcd794264098370dfe11fb92433fd5 /llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | |
| parent | 27406e1f9eb9e3c691a90f8ea20718f144ac65e9 (diff) | |
| download | bcm5719-llvm-35a3a3bd11ac5736fed1a9de052f172c37d989d9.tar.gz bcm5719-llvm-35a3a3bd11ac5736fed1a9de052f172c37d989d9.zip | |
Added single use check to ShrinkDemandedConstant
Fixes cvt_f32_ubyte combine. performCvtF32UByteNCombine() could shrink
source node to demanded bits only even if there are other uses.
Differential Revision: https://reviews.llvm.org/D56289
llvm-svn: 350475
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp index c006bd9c5e5..2e21f57c560 100644 --- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -350,6 +350,9 @@ 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(); |
