LLVM API Documentation

SparcInstrInfo.h

Go to the documentation of this file.
00001 //===- SparcInstrInfo.h - Sparc Instruction Information ---------*- C++ -*-===//
00002 //
00003 //                     The LLVM Compiler Infrastructure
00004 //
00005 // This file was developed by the LLVM research group and is distributed under
00006 // the University of Illinois Open Source License. See LICENSE.TXT for details.
00007 //
00008 //===----------------------------------------------------------------------===//
00009 //
00010 // This file contains the Sparc implementation of the TargetInstrInfo class.
00011 //
00012 //===----------------------------------------------------------------------===//
00013 
00014 #ifndef SPARCINSTRUCTIONINFO_H
00015 #define SPARCINSTRUCTIONINFO_H
00016 
00017 #include "llvm/Target/TargetInstrInfo.h"
00018 #include "SparcRegisterInfo.h"
00019 
00020 namespace llvm {
00021 
00022 /// SPII - This namespace holds all of the target specific flags that
00023 /// instruction info tracks.
00024 ///
00025 namespace SPII {
00026   enum {
00027     Pseudo = (1<<0),
00028     Load = (1<<1),
00029     Store = (1<<2),
00030     DelaySlot = (1<<3)
00031   };
00032 }
00033 
00034 class SparcInstrInfo : public TargetInstrInfo {
00035   const SparcRegisterInfo RI;
00036 public:
00037   SparcInstrInfo(SparcSubtarget &ST);
00038 
00039   /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
00040   /// such, whenever a client has an instance of instruction info, it should
00041   /// always be able to get register info as well (through this method).
00042   ///
00043   virtual const MRegisterInfo &getRegisterInfo() const { return RI; }
00044 
00045   /// Return true if the instruction is a register to register move and
00046   /// leave the source and dest operands in the passed parameters.
00047   ///
00048   virtual bool isMoveInstr(const MachineInstr &MI,
00049                            unsigned &SrcReg, unsigned &DstReg) const;
00050   
00051   /// isLoadFromStackSlot - If the specified machine instruction is a direct
00052   /// load from a stack slot, return the virtual or physical register number of
00053   /// the destination along with the FrameIndex of the loaded stack slot.  If
00054   /// not, return 0.  This predicate must return 0 if the instruction has
00055   /// any side effects other than loading from the stack slot.
00056   virtual unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
00057   
00058   /// isStoreToStackSlot - If the specified machine instruction is a direct
00059   /// store to a stack slot, return the virtual or physical register number of
00060   /// the source reg along with the FrameIndex of the loaded stack slot.  If
00061   /// not, return 0.  This predicate must return 0 if the instruction has
00062   /// any side effects other than storing to the stack slot.
00063   virtual unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
00064 };
00065 
00066 }
00067 
00068 #endif