diff options
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 33 |
1 files changed, 17 insertions, 16 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 6289f9e..5178cad 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -17578,22 +17578,6 @@ static SDValue PerformAndCombine(SDNode *N, SelectionDAG &DAG, if (N1.getOpcode() == ISD::ADD && N1.getOperand(0) == N0 && isAllOnes(N1.getOperand(1))) return DAG.getNode(X86ISD::BLSR, DL, VT, N0); - - // Check for BEXTR - if (N0.getOpcode() == ISD::SRA || N0.getOpcode() == ISD::SRL) { - ConstantSDNode *MaskNode = dyn_cast<ConstantSDNode>(N1); - ConstantSDNode *ShiftNode = dyn_cast<ConstantSDNode>(N0.getOperand(1)); - if (MaskNode && ShiftNode) { - uint64_t Mask = MaskNode->getZExtValue(); - uint64_t Shift = ShiftNode->getZExtValue(); - if (isMask_64(Mask)) { - uint64_t MaskSize = CountPopulation_64(Mask); - if (Shift + MaskSize <= VT.getSizeInBits()) - return DAG.getNode(X86ISD::BEXTR, DL, VT, N0.getOperand(0), - DAG.getConstant(Shift | (MaskSize << 8), VT)); - } - } - } } if (Subtarget->hasBMI2()) { @@ -17622,6 +17606,23 @@ static SDValue PerformAndCombine(SDNode *N, SelectionDAG &DAG, } } + // Check for BEXTR. + if ((Subtarget->hasBMI() || Subtarget->hasTBM()) && + (N0.getOpcode() == ISD::SRA || N0.getOpcode() == ISD::SRL)) { + ConstantSDNode *MaskNode = dyn_cast<ConstantSDNode>(N1); + ConstantSDNode *ShiftNode = dyn_cast<ConstantSDNode>(N0.getOperand(1)); + if (MaskNode && ShiftNode) { + uint64_t Mask = MaskNode->getZExtValue(); + uint64_t Shift = ShiftNode->getZExtValue(); + if (isMask_64(Mask)) { + uint64_t MaskSize = CountPopulation_64(Mask); + if (Shift + MaskSize <= VT.getSizeInBits()) + return DAG.getNode(X86ISD::BEXTR, DL, VT, N0.getOperand(0), + DAG.getConstant(Shift | (MaskSize << 8), VT)); + } + } + } // BEXTR + return SDValue(); } |