1 //===- MBlazeRegisterInfo.h - MBlaze Register Information Impl --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the MBlaze implementation of the TargetRegisterInfo
13 //===----------------------------------------------------------------------===//
15 #ifndef MBLAZEREGISTERINFO_H
16 #define MBLAZEREGISTERINFO_H
19 #include "llvm/Target/TargetRegisterInfo.h"
21 #define GET_REGINFO_HEADER
22 #include "MBlazeGenRegisterInfo.inc"
25 class MBlazeSubtarget;
26 class TargetInstrInfo;
30 /// SubregIndex - The index of various sized subregister classes. Note that
31 /// these indices must be kept in sync with the class indices in the
32 /// MBlazeRegisterInfo.td file.
34 SUBREG_FPEVEN = 1, SUBREG_FPODD = 2
38 struct MBlazeRegisterInfo : public MBlazeGenRegisterInfo {
39 const MBlazeSubtarget &Subtarget;
40 const TargetInstrInfo &TII;
42 MBlazeRegisterInfo(const MBlazeSubtarget &Subtarget,
43 const TargetInstrInfo &tii);
45 /// getRegisterNumbering - Given the enum value for some register, e.g.
46 /// MBlaze::RA, return the number that it corresponds to (e.g. 31).
47 static unsigned getRegisterNumbering(unsigned RegEnum);
48 static unsigned getRegisterFromNumbering(unsigned RegEnum);
49 static unsigned getSpecialRegisterFromNumbering(unsigned RegEnum);
50 static bool isRegister(unsigned RegEnum);
51 static bool isSpecialRegister(unsigned RegEnum);
53 /// Get PIC indirect call register
54 static unsigned getPICCallReg();
56 /// Code Generation virtual methods...
57 const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
59 BitVector getReservedRegs(const MachineFunction &MF) const;
61 void eliminateCallFramePseudoInstr(MachineFunction &MF,
62 MachineBasicBlock &MBB,
63 MachineBasicBlock::iterator I) const;
65 /// Stack Frame Processing Methods
66 void eliminateFrameIndex(MachineBasicBlock::iterator II,
67 int SPAdj, RegScavenger *RS = NULL) const;
69 void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
71 /// Debug information queries.
72 unsigned getRARegister() const;
73 unsigned getFrameRegister(const MachineFunction &MF) const;
75 /// Exception handling queries.
76 unsigned getEHExceptionRegister() const;
77 unsigned getEHHandlerRegister() const;
79 int getDwarfRegNum(unsigned RegNum, bool isEH) const;
80 int getLLVMRegNum(unsigned RegNum, bool isEH) const;
83 } // end namespace llvm