1 //===- BlackfinRegisterInfo.h - Blackfin Register Information ..-*- 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 Blackfin implementation of the TargetRegisterInfo
13 //===----------------------------------------------------------------------===//
15 #ifndef BLACKFINREGISTERINFO_H
16 #define BLACKFINREGISTERINFO_H
18 #include "llvm/Target/TargetRegisterInfo.h"
19 #include "BlackfinGenRegisterInfo.h.inc"
23 class BlackfinSubtarget;
24 class TargetInstrInfo;
27 // Subregister indices, keep in sync with BlackfinRegisterInfo.td
34 struct BlackfinRegisterInfo : public BlackfinGenRegisterInfo {
35 BlackfinSubtarget &Subtarget;
36 const TargetInstrInfo &TII;
38 BlackfinRegisterInfo(BlackfinSubtarget &st, const TargetInstrInfo &tii);
40 /// Code Generation virtual methods...
41 const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
43 const TargetRegisterClass* const*
44 getCalleeSavedRegClasses(const MachineFunction *MF = 0) const;
46 BitVector getReservedRegs(const MachineFunction &MF) const;
48 // getSubReg implemented by tablegen
50 const TargetRegisterClass *getPointerRegClass(unsigned Kind = 0) const {
51 return &BF::PRegClass;
54 const TargetRegisterClass *getPhysicalRegisterRegClass(unsigned reg,
57 bool hasFP(const MachineFunction &MF) const;
59 // bool hasReservedCallFrame(MachineFunction &MF) const;
61 bool requiresRegisterScavenging(const MachineFunction &MF) const;
63 void eliminateCallFramePseudoInstr(MachineFunction &MF,
64 MachineBasicBlock &MBB,
65 MachineBasicBlock::iterator I) const;
67 void eliminateFrameIndex(MachineBasicBlock::iterator II,
68 int SPAdj, RegScavenger *RS = NULL) const;
70 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
71 RegScavenger *RS) const;
73 void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
75 void emitPrologue(MachineFunction &MF) const;
76 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
78 unsigned getFrameRegister(MachineFunction &MF) const;
79 unsigned getRARegister() const;
81 // Exception handling queries.
82 unsigned getEHExceptionRegister() const;
83 unsigned getEHHandlerRegister() const;
85 int getDwarfRegNum(unsigned RegNum, bool isEH) const;
88 void adjustRegister(MachineBasicBlock &MBB,
89 MachineBasicBlock::iterator I,
94 void loadConstant(MachineBasicBlock &MBB,
95 MachineBasicBlock::iterator I,
101 } // end namespace llvm