1 //===-- MipsRegisterInfo.h - Mips Register Information Impl -----*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains the Mips implementation of the TargetRegisterInfo class.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H
15 #define LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H
16 
17 #include "Mips.h"
18 #include "llvm/Target/TargetRegisterInfo.h"
19 
20 #define GET_REGINFO_HEADER
21 #include "MipsGenRegisterInfo.inc"
22 
23 namespace llvm {
24 class MipsRegisterInfo : public MipsGenRegisterInfo {
25 public:
26   MipsRegisterInfo();
27 
28   /// getRegisterNumbering - Given the enum value for some register, e.g.
29   /// Mips::RA, return the number that it corresponds to (e.g. 31).
30   static unsigned getRegisterNumbering(unsigned RegEnum);
31 
32   /// Get PIC indirect call register
33   static unsigned getPICCallReg();
34 
35   /// Adjust the Mips stack frame.
36   void adjustMipsStackFrame(MachineFunction &MF) const;
37 
38   /// Code Generation virtual methods...
39   const TargetRegisterClass *getPointerRegClass(const MachineFunction &MF,
40                                                 unsigned Kind) const override;
41 
42   unsigned getRegPressureLimit(const TargetRegisterClass *RC,
43                                MachineFunction &MF) const override;
44   const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
45   const uint32_t *getCallPreservedMask(const MachineFunction &MF,
46                                        CallingConv::ID) const override;
47   static const uint32_t *getMips16RetHelperMask();
48 
49   BitVector getReservedRegs(const MachineFunction &MF) const override;
50 
51   bool requiresRegisterScavenging(const MachineFunction &MF) const override;
52 
53   bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override;
54 
55   /// Stack Frame Processing Methods
56   void eliminateFrameIndex(MachineBasicBlock::iterator II,
57                            int SPAdj, unsigned FIOperandNum,
58                            RegScavenger *RS = nullptr) const override;
59 
60   void processFunctionBeforeFrameFinalized(MachineFunction &MF,
61                                        RegScavenger *RS = nullptr) const;
62 
63   /// Debug information queries.
64   unsigned getFrameRegister(const MachineFunction &MF) const override;
65 
66   /// \brief Return GPR register class.
67   virtual const TargetRegisterClass *intRegClass(unsigned Size) const = 0;
68 
69 private:
70   virtual void eliminateFI(MachineBasicBlock::iterator II, unsigned OpNo,
71                            int FrameIndex, uint64_t StackSize,
72                            int64_t SPOffset) const = 0;
73 };
74 
75 } // end namespace llvm
76 
77 #endif
78