diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index de666798b03..fe2fd090e21 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -37425,6 +37425,12 @@ static SDValue combineOr(SDNode *N, SelectionDAG &DAG, SDValue Sum = ShAmt1.getOperand(0); if (auto *SumC = dyn_cast<ConstantSDNode>(Sum)) { SDValue ShAmt1Op1 = ShAmt1.getOperand(1); + if (ShAmt1Op1.getOpcode() == ISD::AND && + isa<ConstantSDNode>(ShAmt1Op1.getOperand(1)) && + ShAmt1Op1.getConstantOperandVal(1) == (Bits - 1)) { + ShMsk1 = ShAmt1Op1; + ShAmt1Op1 = ShAmt1Op1.getOperand(0); + } if (ShAmt1Op1.getOpcode() == ISD::TRUNCATE) ShAmt1Op1 = ShAmt1Op1.getOperand(0); if ((SumC->getAPIntValue() == Bits || |
