diff options
| -rw-r--r-- | include/llvm/Target/TargetInstrInfo.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/llvm/Target/TargetInstrInfo.h b/include/llvm/Target/TargetInstrInfo.h index 1d42c323b9..b16df5c2da 100644 --- a/include/llvm/Target/TargetInstrInfo.h +++ b/include/llvm/Target/TargetInstrInfo.h @@ -21,7 +21,6 @@ namespace llvm { class MCAsmInfo; class TargetRegisterClass; -class TargetRegisterInfo; class LiveVariables; class CalleeSavedInfo; class SDNode; @@ -226,6 +225,14 @@ public: virtual bool findCommutedOpIndices(MachineInstr *MI, unsigned &SrcOpIdx1, unsigned &SrcOpIdx2) const = 0; + /// isIdentical - Return true if two instructions are identical. This differs + /// from MachineInstr::isIdenticalTo() in that it does not require the + /// virtual destination registers to be the same. This is used by MachineLICM + /// and other MI passes to perform CSE. + virtual bool isIdentical(const MachineInstr *MI, + const MachineInstr *Other, + const MachineRegisterInfo *MRI) const = 0; + /// AnalyzeBranch - Analyze the branching code at the end of MBB, returning /// true if it cannot be understood (e.g. it's a switch dispatch or isn't /// implemented for a target). Upon success, this returns false and returns @@ -510,6 +517,10 @@ public: MachineBasicBlock::iterator MI, unsigned DestReg, unsigned SubReg, const MachineInstr *Orig) const; + virtual bool isIdentical(const MachineInstr *MI, + const MachineInstr *Other, + const MachineRegisterInfo *MRI) const; + virtual unsigned GetFunctionSizeInBytes(const MachineFunction &MF) const; }; |