diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 16 | ||||
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.h | 11 |
2 files changed, 27 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index b8f87d3873b..28bcb56a23c 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -41380,6 +41380,22 @@ static SDValue combineFneg(SDNode *N, SelectionDAG &DAG, return SDValue(); } +char X86TargetLowering::isNegatibleForFree(SDValue Op, SelectionDAG &DAG, + bool LegalOperations, + bool ForCodeSize, + unsigned Depth) const { + return TargetLowering::isNegatibleForFree(Op, DAG, LegalOperations, + ForCodeSize, Depth); +} + +SDValue X86TargetLowering::getNegatedExpression(SDValue Op, SelectionDAG &DAG, + bool LegalOperations, + bool ForCodeSize, + unsigned Depth) const { + return TargetLowering::getNegatedExpression(Op, DAG, LegalOperations, + ForCodeSize, Depth); +} + static SDValue lowerX86FPLogicOp(SDNode *N, SelectionDAG &DAG, const X86Subtarget &Subtarget) { MVT VT = N->getSimpleValueType(0); diff --git a/llvm/lib/Target/X86/X86ISelLowering.h b/llvm/lib/Target/X86/X86ISelLowering.h index 5c967ca1eca..33a8e379e13 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.h +++ b/llvm/lib/Target/X86/X86ISelLowering.h @@ -802,6 +802,17 @@ namespace llvm { /// and some i16 instructions are slow. bool IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const override; + /// Return 1 if we can compute the negated form of the specified expression + /// for the same cost as the expression itself, or 2 if we can compute the + /// negated form more cheaply than the expression itself. Else return 0. + char isNegatibleForFree(SDValue Op, SelectionDAG &DAG, bool LegalOperations, + bool ForCodeSize, unsigned Depth) const override; + + /// If isNegatibleForFree returns true, return the newly negated expression. + SDValue getNegatedExpression(SDValue Op, SelectionDAG &DAG, + bool LegalOperations, bool ForCodeSize, + unsigned Depth) const override; + MachineBasicBlock * EmitInstrWithCustomInserter(MachineInstr &MI, MachineBasicBlock *MBB) const override; |
