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 MIPSREGISTERINFO_H 15 #define 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 MipsSubtarget; 25 class Type; 26 27 class MipsRegisterInfo : public MipsGenRegisterInfo { 28 protected: 29 const MipsSubtarget &Subtarget; 30 31 public: 32 MipsRegisterInfo(const MipsSubtarget &Subtarget); 33 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); 37 38 /// Get PIC indirect call register 39 static unsigned getPICCallReg(); 40 41 /// Adjust the Mips stack frame. 42 void adjustMipsStackFrame(MachineFunction &MF) const; 43 44 /// Code Generation virtual methods... 45 unsigned getRegPressureLimit(const TargetRegisterClass *RC, 46 MachineFunction &MF) const; 47 const uint16_t *getCalleeSavedRegs(const MachineFunction *MF = 0) const; 48 const uint32_t *getCallPreservedMask(CallingConv::ID) const; 49 static const uint32_t *getMips16RetHelperMask(); 50 51 BitVector getReservedRegs(const MachineFunction &MF) const; 52 53 virtual bool requiresRegisterScavenging(const MachineFunction &MF) const; 54 55 virtual bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const; 56 57 /// Stack Frame Processing Methods 58 void eliminateFrameIndex(MachineBasicBlock::iterator II, 59 int SPAdj, unsigned FIOperandNum, 60 RegScavenger *RS = NULL) const; 61 62 void processFunctionBeforeFrameFinalized(MachineFunction &MF, 63 RegScavenger *RS = NULL) const; 64 65 /// Debug information queries. 66 unsigned getFrameRegister(const MachineFunction &MF) const; 67 68 /// Exception handling queries. 69 unsigned getEHExceptionRegister() const; 70 unsigned getEHHandlerRegister() const; 71 72 /// \brief Return GPR register class. 73 virtual const TargetRegisterClass *intRegClass(unsigned Size) const = 0; 74 75 private: 76 virtual void eliminateFI(MachineBasicBlock::iterator II, unsigned OpNo, 77 int FrameIndex, uint64_t StackSize, 78 int64_t SPOffset) const = 0; 79 }; 80 81 } // end namespace llvm 82 83 #endif 84
