diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 2bc9090428b..76e2be650b3 100644 --- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -1084,19 +1084,19 @@ bool TargetLowering::SimplifyDemandedBits(SDValue Op, break; } case ISD::ZERO_EXTEND: { - unsigned OperandBitWidth = Op.getOperand(0).getScalarValueSizeInBits(); + SDValue Src = Op.getOperand(0); + unsigned InBits = Src.getScalarValueSizeInBits(); // If none of the top bits are demanded, convert this into an any_extend. - if (DemandedBits.getActiveBits() <= OperandBitWidth) - return TLO.CombineTo(Op, TLO.DAG.getNode(ISD::ANY_EXTEND, dl, VT, - Op.getOperand(0))); + if (DemandedBits.getActiveBits() <= InBits) + return TLO.CombineTo(Op, TLO.DAG.getNode(ISD::ANY_EXTEND, dl, VT, Src)); - APInt InMask = DemandedBits.trunc(OperandBitWidth); - if (SimplifyDemandedBits(Op.getOperand(0), InMask, Known, TLO, Depth+1)) + APInt InDemandedBits = DemandedBits.trunc(InBits); + if (SimplifyDemandedBits(Src, InDemandedBits, Known, TLO, Depth+1)) return true; assert(!Known.hasConflict() && "Bits known to be one AND zero?"); Known = Known.zext(BitWidth); - Known.Zero.setBitsFrom(OperandBitWidth); + Known.Zero.setBitsFrom(InBits); break; } case ISD::SIGN_EXTEND: { @@ -1143,9 +1143,10 @@ bool TargetLowering::SimplifyDemandedBits(SDValue Op, break; } case ISD::ANY_EXTEND: { - unsigned OperandBitWidth = Op.getOperand(0).getScalarValueSizeInBits(); - APInt InMask = DemandedBits.trunc(OperandBitWidth); - if (SimplifyDemandedBits(Op.getOperand(0), InMask, Known, TLO, Depth+1)) + SDValue Src = Op.getOperand(0); + unsigned InBits = Src.getScalarValueSizeInBits(); + APInt InDemandedBits = DemandedBits.trunc(InBits); + if (SimplifyDemandedBits(Src, InDemandedBits, Known, TLO, Depth+1)) return true; assert(!Known.hasConflict() && "Bits known to be one AND zero?"); Known = Known.zext(BitWidth); |
