1//===-- Mips16InstrInfo.h - Mips16 Instruction Information ------*- 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 Mips16 implementation of the TargetInstrInfo class. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef MIPS16INSTRUCTIONINFO_H 15#define MIPS16INSTRUCTIONINFO_H 16 17#include "Mips16RegisterInfo.h" 18#include "MipsInstrInfo.h" 19 20namespace llvm { 21 22class Mips16InstrInfo : public MipsInstrInfo { 23 const Mips16RegisterInfo RI; 24 25public: 26 explicit Mips16InstrInfo(MipsTargetMachine &TM); 27 28 virtual const MipsRegisterInfo &getRegisterInfo() const; 29 30 /// isLoadFromStackSlot - If the specified machine instruction is a direct 31 /// load from a stack slot, return the virtual or physical register number of 32 /// the destination along with the FrameIndex of the loaded stack slot. If 33 /// not, return 0. This predicate must return 0 if the instruction has 34 /// any side effects other than loading from the stack slot. 35 virtual unsigned isLoadFromStackSlot(const MachineInstr *MI, 36 int &FrameIndex) const; 37 38 /// isStoreToStackSlot - If the specified machine instruction is a direct 39 /// store to a stack slot, return the virtual or physical register number of 40 /// the source reg along with the FrameIndex of the loaded stack slot. If 41 /// not, return 0. This predicate must return 0 if the instruction has 42 /// any side effects other than storing to the stack slot. 43 virtual unsigned isStoreToStackSlot(const MachineInstr *MI, 44 int &FrameIndex) const; 45 46 virtual void copyPhysReg(MachineBasicBlock &MBB, 47 MachineBasicBlock::iterator MI, DebugLoc DL, 48 unsigned DestReg, unsigned SrcReg, 49 bool KillSrc) const; 50 51 virtual void storeRegToStackSlot(MachineBasicBlock &MBB, 52 MachineBasicBlock::iterator MBBI, 53 unsigned SrcReg, bool isKill, int FrameIndex, 54 const TargetRegisterClass *RC, 55 const TargetRegisterInfo *TRI) const; 56 57 virtual void loadRegFromStackSlot(MachineBasicBlock &MBB, 58 MachineBasicBlock::iterator MBBI, 59 unsigned DestReg, int FrameIndex, 60 const TargetRegisterClass *RC, 61 const TargetRegisterInfo *TRI) const; 62 63 virtual bool expandPostRAPseudo(MachineBasicBlock::iterator MI) const; 64 65 virtual unsigned GetOppositeBranchOpc(unsigned Opc) const; 66 67 // Adjust SP by FrameSize bytes. Save RA, S0, S1 68 void makeFrame(unsigned SP, int64_t FrameSize, MachineBasicBlock &MBB, 69 MachineBasicBlock::iterator I) const; 70 71 // Adjust SP by FrameSize bytes. Restore RA, S0, S1 72 void restoreFrame(unsigned SP, int64_t FrameSize, MachineBasicBlock &MBB, 73 MachineBasicBlock::iterator I) const; 74 75 76 /// Adjust SP by Amount bytes. 77 void adjustStackPtr(unsigned SP, int64_t Amount, MachineBasicBlock &MBB, 78 MachineBasicBlock::iterator I) const; 79 80 /// Emit a series of instructions to load an immediate. 81 // This is to adjust some FrameReg. We return the new register to be used 82 // in place of FrameReg and the adjusted immediate field (&NewImm) 83 // 84 unsigned loadImmediate(unsigned FrameReg, 85 int64_t Imm, MachineBasicBlock &MBB, 86 MachineBasicBlock::iterator II, DebugLoc DL, 87 unsigned &NewImm) const; 88 89 static bool validSpImm8(int offset) { 90 return ((offset & 7) == 0) && isInt<11>(offset); 91 } 92 93 // 94 // build the proper one based on the Imm field 95 // 96 97 const MCInstrDesc& AddiuSpImm(int64_t Imm) const; 98 99 void BuildAddiuSpImm 100 (MachineBasicBlock &MBB, MachineBasicBlock::iterator I, int64_t Imm) const; 101 102private: 103 virtual unsigned GetAnalyzableBrOpc(unsigned Opc) const; 104 105 void ExpandRetRA16(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, 106 unsigned Opc) const; 107 108 // Adjust SP by Amount bytes where bytes can be up to 32bit number. 109 void adjustStackPtrBig(unsigned SP, int64_t Amount, MachineBasicBlock &MBB, 110 MachineBasicBlock::iterator I, 111 unsigned Reg1, unsigned Reg2) const; 112 113 // Adjust SP by Amount bytes where bytes can be up to 32bit number. 114 void adjustStackPtrBigUnrestricted(unsigned SP, int64_t Amount, 115 MachineBasicBlock &MBB, 116 MachineBasicBlock::iterator I) const; 117 118}; 119 120} 121 122#endif 123