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"
20 #include "MBlazeGenRegisterInfo.h.inc"
23 class MBlazeSubtarget;
24 class TargetInstrInfo;
28 /// SubregIndex - The index of various sized subregister classes. Note that
29 /// these indices must be kept in sync with the class indices in the
30 /// MBlazeRegisterInfo.td file.
32 SUBREG_FPEVEN = 1, SUBREG_FPODD = 2
36 struct MBlazeRegisterInfo : public MBlazeGenRegisterInfo {
37 const MBlazeSubtarget &Subtarget;
38 const TargetInstrInfo &TII;
40 MBlazeRegisterInfo(const MBlazeSubtarget &Subtarget,
41 const TargetInstrInfo &tii);
43 /// getRegisterNumbering - Given the enum value for some register, e.g.
44 /// MBlaze::RA, return the number that it corresponds to (e.g. 31).
45 static unsigned getRegisterNumbering(unsigned RegEnum);
46 static unsigned getRegisterFromNumbering(unsigned RegEnum);
48 /// Get PIC indirect call register
49 static unsigned getPICCallReg();
51 /// Adjust the MBlaze stack frame.
52 void adjustMBlazeStackFrame(MachineFunction &MF) const;
54 /// Code Generation virtual methods...
55 const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
57 const TargetRegisterClass* const*
58 getCalleeSavedRegClasses(const MachineFunction* MF = 0) const;
60 BitVector getReservedRegs(const MachineFunction &MF) const;
62 bool hasFP(const MachineFunction &MF) const;
64 void eliminateCallFramePseudoInstr(MachineFunction &MF,
65 MachineBasicBlock &MBB,
66 MachineBasicBlock::iterator I) const;
68 /// Stack Frame Processing Methods
69 unsigned eliminateFrameIndex(MachineBasicBlock::iterator II,
70 int SPAdj, int *Value = NULL,
71 RegScavenger *RS = NULL) const;
73 void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
75 void emitPrologue(MachineFunction &MF) const;
76 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
78 /// Debug information queries.
79 unsigned getRARegister() const;
80 unsigned getFrameRegister(const MachineFunction &MF) const;
82 /// Exception handling queries.
83 unsigned getEHExceptionRegister() const;
84 unsigned getEHHandlerRegister() const;
86 /// targetHandlesStackFrameRounding - Returns true if the target is
87 /// responsible for rounding up the stack frame (probably at emitPrologue
89 bool targetHandlesStackFrameRounding() const { return true; }
91 int getDwarfRegNum(unsigned RegNum, bool isEH) const;
94 } // end namespace llvm