diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 03efc51db2a..54899ab9263 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -3608,9 +3608,12 @@ unsigned SelectionDAG::ComputeNumSignBits(SDValue Op, const APInt &DemandedElts, } case ISD::SRA: Tmp = ComputeNumSignBits(Op.getOperand(0), DemandedElts, Depth + 1); - // SRA X, C -> adds C sign bits. + // SRA X, C -> adds C sign bits. if (const APInt *ShAmt = getValidShiftAmountConstant(Op, DemandedElts)) Tmp = std::min<uint64_t>(Tmp + ShAmt->getZExtValue(), VTBits); + else if (const APInt *ShAmt = + getValidMinimumShiftAmountConstant(Op, DemandedElts)) + Tmp = std::min<uint64_t>(Tmp + ShAmt->getZExtValue(), VTBits); return Tmp; case ISD::SHL: if (const APInt *ShAmt = getValidShiftAmountConstant(Op, DemandedElts)) { |
