1 //===-- MipsRegisterInfo.h - Mips 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 Mips implementation of the TargetRegisterInfo class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H
15 #define LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H
18 #include "llvm/Target/TargetRegisterInfo.h"
20 #define GET_REGINFO_HEADER
21 #include "MipsGenRegisterInfo.inc"
27 class MipsRegisterInfo : public MipsGenRegisterInfo {
29 const MipsSubtarget &Subtarget;
32 MipsRegisterInfo(const MipsSubtarget &Subtarget);
34 /// getRegisterNumbering - Given the enum value for some register, e.g.
35 /// Mips::RA, return the number that it corresponds to (e.g. 31).
36 static unsigned getRegisterNumbering(unsigned RegEnum);
38 /// Get PIC indirect call register
39 static unsigned getPICCallReg();
41 /// Adjust the Mips stack frame.
42 void adjustMipsStackFrame(MachineFunction &MF) const;
44 /// Code Generation virtual methods...
45 const TargetRegisterClass *getPointerRegClass(const MachineFunction &MF,
46 unsigned Kind) const override;
48 unsigned getRegPressureLimit(const TargetRegisterClass *RC,
49 MachineFunction &MF) const override;
51 getCalleeSavedRegs(const MachineFunction *MF = nullptr) const override;
52 const uint32_t *getCallPreservedMask(CallingConv::ID) const override;
53 static const uint32_t *getMips16RetHelperMask();
55 BitVector getReservedRegs(const MachineFunction &MF) const override;
57 bool requiresRegisterScavenging(const MachineFunction &MF) const override;
59 bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override;
61 /// Stack Frame Processing Methods
62 void eliminateFrameIndex(MachineBasicBlock::iterator II,
63 int SPAdj, unsigned FIOperandNum,
64 RegScavenger *RS = nullptr) const override;
66 void processFunctionBeforeFrameFinalized(MachineFunction &MF,
67 RegScavenger *RS = nullptr) const;
69 /// Debug information queries.
70 unsigned getFrameRegister(const MachineFunction &MF) const override;
72 /// \brief Return GPR register class.
73 virtual const TargetRegisterClass *intRegClass(unsigned Size) const = 0;
76 virtual void eliminateFI(MachineBasicBlock::iterator II, unsigned OpNo,
77 int FrameIndex, uint64_t StackSize,
78 int64_t SPOffset) const = 0;
81 } // end namespace llvm