diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 02159de0c7..7d64b2441d 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -1491,6 +1491,11 @@ void SelectionDAG::ComputeMaskedBits(SDValue Op, const APInt &Mask, KnownOne &= KnownOne2; KnownZero &= KnownZero2; return; + case ISD::SADDO: + case ISD::UADDO: + if (Op.getResNo() != 1) + return; + // The boolean result conforms to getSetCCResultContents. Fall through. case ISD::SETCC: // If we know the result of a setcc has the top bits zero, use this info. if (TLI.getSetCCResultContents() == TargetLowering::ZeroOrOneSetCCResult && @@ -1893,7 +1898,12 @@ unsigned SelectionDAG::ComputeNumSignBits(SDValue Op, unsigned Depth) const{ if (Tmp == 1) return 1; // Early out. Tmp2 = ComputeNumSignBits(Op.getOperand(2), Depth+1); return std::min(Tmp, Tmp2); - + + case ISD::SADDO: + case ISD::UADDO: + if (Op.getResNo() != 1) + break; + // The boolean result conforms to getSetCCResultContents. Fall through. case ISD::SETCC: // If setcc returns 0/-1, all bits are sign bits. if (TLI.getSetCCResultContents() == |