diff options
Diffstat (limited to 'llvm/lib/Target/X86')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 58815524b0a..d4c2b108537 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -19033,16 +19033,11 @@ static SDValue lowerAddSubToHorizontalOp(SDValue Op, SelectionDAG &DAG, if (!IsFP && !Subtarget.hasSSSE3()) return Op; - // Defer forming the minimal horizontal op if the vector source has more than - // the 2 extract element uses that we're matching here. In that case, we might - // form a horizontal op that includes more than 1 add/sub op. + // Extract from a common vector. if (LHS.getOpcode() != ISD::EXTRACT_VECTOR_ELT || RHS.getOpcode() != ISD::EXTRACT_VECTOR_ELT || LHS.getOperand(0) != RHS.getOperand(0) || - !LHS.getOperand(0)->hasNUsesOfValue(2, 0)) - return Op; - - if (!isa<ConstantSDNode>(LHS.getOperand(1)) || + !isa<ConstantSDNode>(LHS.getOperand(1)) || !isa<ConstantSDNode>(RHS.getOperand(1)) || !shouldUseHorizontalOp(true, DAG, Subtarget)) return Op; |

