1 files changed, 11 insertions, 0 deletions
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;