diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index b456b74abd3..0b59af2fa10 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -2463,27 +2463,30 @@ void SelectionDAG::computeKnownBits(SDValue Op, KnownBits &Known, case ISD::SHL: if (const APInt *ShAmt = getValidShiftAmountConstant(Op)) { computeKnownBits(Op.getOperand(0), Known, DemandedElts, Depth + 1); - Known.Zero <<= *ShAmt; - Known.One <<= *ShAmt; + unsigned Shift = ShAmt->getZExtValue(); + Known.Zero <<= Shift; + Known.One <<= Shift; // Low bits are known zero. - Known.Zero.setLowBits(ShAmt->getZExtValue()); + Known.Zero.setLowBits(Shift); } break; case ISD::SRL: if (const APInt *ShAmt = getValidShiftAmountConstant(Op)) { computeKnownBits(Op.getOperand(0), Known, DemandedElts, Depth + 1); - Known.Zero.lshrInPlace(*ShAmt); - Known.One.lshrInPlace(*ShAmt); + unsigned Shift = ShAmt->getZExtValue(); + Known.Zero.lshrInPlace(Shift); + Known.One.lshrInPlace(Shift); // High bits are known zero. - Known.Zero.setHighBits(ShAmt->getZExtValue()); + Known.Zero.setHighBits(Shift); } break; case ISD::SRA: if (const APInt *ShAmt = getValidShiftAmountConstant(Op)) { computeKnownBits(Op.getOperand(0), Known, DemandedElts, Depth + 1); + unsigned Shift = ShAmt->getZExtValue(); // Sign extend known zero/one bit (else is unknown). - Known.Zero.ashrInPlace(*ShAmt); - Known.One.ashrInPlace(*ShAmt); + Known.Zero.ashrInPlace(Shift); + Known.One.ashrInPlace(Shift); } break; case ISD::SIGN_EXTEND_INREG: { |
