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 struct BlackfinRegisterInfo : public BlackfinGenRegisterInfo {
28 BlackfinSubtarget &Subtarget;
29 const TargetInstrInfo &TII;
31 BlackfinRegisterInfo(BlackfinSubtarget &st, const TargetInstrInfo &tii);
33 /// Code Generation virtual methods...
34 const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
36 BitVector getReservedRegs(const MachineFunction &MF) const;
38 // getSubReg implemented by tablegen
40 const TargetRegisterClass *getPointerRegClass(unsigned Kind = 0) const {
41 return &BF::PRegClass;
44 bool hasFP(const MachineFunction &MF) const;
46 // bool hasReservedCallFrame(MachineFunction &MF) const;
48 bool requiresRegisterScavenging(const MachineFunction &MF) const;
50 void eliminateCallFramePseudoInstr(MachineFunction &MF,
51 MachineBasicBlock &MBB,
52 MachineBasicBlock::iterator I) const;
54 unsigned eliminateFrameIndex(MachineBasicBlock::iterator II,
55 int SPAdj, FrameIndexValue *Value = NULL,
56 RegScavenger *RS = NULL) const;
58 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
59 RegScavenger *RS) const;
61 void emitPrologue(MachineFunction &MF) const;
62 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
64 unsigned getFrameRegister(const MachineFunction &MF) const;
65 unsigned getRARegister() const;
67 // Exception handling queries.
68 unsigned getEHExceptionRegister() const;
69 unsigned getEHHandlerRegister() const;
71 int getDwarfRegNum(unsigned RegNum, bool isEH) const;
74 void adjustRegister(MachineBasicBlock &MBB,
75 MachineBasicBlock::iterator I,
80 void loadConstant(MachineBasicBlock &MBB,
81 MachineBasicBlock::iterator I,
87 } // end namespace llvm