[RegisterCoalescer] Moving the RegisterCoalescer subtarget hook onto the TargetRegist...

[oota-llvm.git] / lib / Target / ARM / ARMBaseRegisterInfo.h

diff --git a/lib/Target/ARM/ARMBaseRegisterInfo.h b/lib/Target/ARM/ARMBaseRegisterInfo.h
index 91df565a27d8bf418e7f451c62a7a75cb56af340..833d3f218480cca8a9ff948b5950574e5185d5c8 100644 (file)
--- a/lib/Target/ARM/ARMBaseRegisterInfo.h
+++ b/lib/Target/ARM/ARMBaseRegisterInfo.h
@@ -187,6 +187,14 @@ public:
   void eliminateFrameIndex(MachineBasicBlock::iterator II,
                            int SPAdj, unsigned FIOperandNum,
                            RegScavenger *RS = nullptr) const override;
+
+  /// \brief SrcRC and DstRC will be morphed into NewRC if this returns true
+  bool shouldCoalesce(MachineInstr *MI,
+                      const TargetRegisterClass *SrcRC,
+                      unsigned SubReg,
+                      const TargetRegisterClass *DstRC,
+                      unsigned DstSubReg,
+                      const TargetRegisterClass *NewRC) const override;
 };
 
 } // end namespace llvm