diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 017db41fa9e..0189a11fa1d 100644 --- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -1335,6 +1335,13 @@ bool TargetLowering::SimplifyDemandedBits(SDValue Op, LLVM_FALLTHROUGH; } default: + if (Op.getOpcode() >= ISD::BUILTIN_OP_END) { + if (SimplifyDemandedBitsForTargetNode(Op, DemandedBits, Known, TLO, + Depth)) + return true; + break; + } + // Just use computeKnownBits to compute output bits. TLO.DAG.computeKnownBits(Op, Known, Depth); break; @@ -1803,6 +1810,23 @@ bool TargetLowering::SimplifyDemandedVectorEltsForTargetNode( return false; } +bool TargetLowering::SimplifyDemandedBitsForTargetNode( + SDValue Op, const APInt &DemandedBits, KnownBits &Known, + TargetLoweringOpt &TLO, unsigned Depth) const { + assert((Op.getOpcode() >= ISD::BUILTIN_OP_END || + Op.getOpcode() == ISD::INTRINSIC_WO_CHAIN || + Op.getOpcode() == ISD::INTRINSIC_W_CHAIN || + Op.getOpcode() == ISD::INTRINSIC_VOID) && + "Should use SimplifyDemandedBits if you don't know whether Op" + " is a target node!"); + EVT VT = Op.getValueType(); + APInt DemandedElts = VT.isVector() + ? APInt::getAllOnesValue(VT.getVectorNumElements()) + : APInt(1, 1); + computeKnownBitsForTargetNode(Op, Known, DemandedElts, TLO.DAG, Depth); + return false; +} + bool TargetLowering::isKnownNeverNaNForTargetNode(SDValue Op, const SelectionDAG &DAG, bool SNaN, |
