diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index cbdd7135de4..60eefbc677d 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -33998,6 +33998,7 @@ static SDValue combineX86ShufflesConstants(ArrayRef<SDValue> Ops, return SDValue(); // Shuffle the constant bits according to the mask. + SDLoc DL(Root); APInt UndefElts(NumMaskElts, 0); APInt ZeroElts(NumMaskElts, 0); APInt ConstantElts(NumMaskElts, 0); @@ -34035,6 +34036,10 @@ static SDValue combineX86ShufflesConstants(ArrayRef<SDValue> Ops, } assert((UndefElts | ZeroElts | ConstantElts).isAllOnesValue()); + // Attempt to create a zero vector. + if ((UndefElts | ZeroElts).isAllOnesValue()) + return getZeroVector(Root.getSimpleValueType(), Subtarget, DAG, DL); + // Create the constant data. MVT MaskSVT; if (VT.isFloatingPoint() && (MaskSizeInBits == 32 || MaskSizeInBits == 64)) @@ -34043,8 +34048,9 @@ static SDValue combineX86ShufflesConstants(ArrayRef<SDValue> Ops, MaskSVT = MVT::getIntegerVT(MaskSizeInBits); MVT MaskVT = MVT::getVectorVT(MaskSVT, NumMaskElts); + if (!DAG.getTargetLoweringInfo().isTypeLegal(MaskVT)) + return SDValue(); - SDLoc DL(Root); SDValue CstOp = getConstVector(ConstantBitData, UndefElts, MaskVT, DAG, DL); return DAG.getBitcast(VT, CstOp); } |
