diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 0cc7c157b74..80e83544cbb 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -33237,6 +33237,22 @@ bool X86TargetLowering::SimplifyDemandedVectorEltsForTargetNode( // Handle special case opcodes. switch (Opc) { + case X86ISD::PMULDQ: + case X86ISD::PMULUDQ: { + APInt LHSUndef, LHSZero; + APInt RHSUndef, RHSZero; + SDValue LHS = Op.getOperand(0); + SDValue RHS = Op.getOperand(1); + if (SimplifyDemandedVectorElts(LHS, DemandedElts, LHSUndef, LHSZero, TLO, + Depth + 1)) + return true; + if (SimplifyDemandedVectorElts(RHS, DemandedElts, RHSUndef, RHSZero, TLO, + Depth + 1)) + return true; + // Multiply by zero. + KnownZero = LHSZero | RHSZero; + break; + } case X86ISD::VSHL: case X86ISD::VSRL: case X86ISD::VSRA: { @@ -33433,7 +33449,10 @@ bool X86TargetLowering::SimplifyDemandedVectorEltsForTargetNode( SDValue Insert = insertSubVector(UndefVec, ExtOp, 0, TLO.DAG, DL, ExtSizeInBits); return TLO.CombineTo(Op, Insert); - } + } + // Arithmetic Ops. + case X86ISD::PMULDQ: + case X86ISD::PMULUDQ: // Target Shuffles. case X86ISD::PSHUFB: case X86ISD::UNPCKL: @@ -33552,9 +33571,11 @@ bool X86TargetLowering::SimplifyDemandedBitsForTargetNode( SDValue RHS = Op.getOperand(1); // FIXME: Can we bound this better? APInt DemandedMask = APInt::getLowBitsSet(64, 32); - if (SimplifyDemandedBits(LHS, DemandedMask, KnownOp, TLO, Depth + 1)) + if (SimplifyDemandedBits(LHS, DemandedMask, OriginalDemandedElts, KnownOp, + TLO, Depth + 1)) return true; - if (SimplifyDemandedBits(RHS, DemandedMask, KnownOp, TLO, Depth + 1)) + if (SimplifyDemandedBits(RHS, DemandedMask, OriginalDemandedElts, KnownOp, + TLO, Depth + 1)) return true; break; } |
