Bruno Cardoso Lopes | 972f589 | 2007-06-06 07:42:06 +0000 | [diff] [blame] | 1 | //===- MipsInstrInfo.h - Mips Instruction Information -----------*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 4ee451d | 2007-12-29 20:36:04 +0000 | [diff] [blame^] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Bruno Cardoso Lopes | 972f589 | 2007-06-06 07:42:06 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file contains the Mips implementation of the TargetInstrInfo class. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef MIPSINSTRUCTIONINFO_H |
| 15 | #define MIPSINSTRUCTIONINFO_H |
| 16 | |
| 17 | #include "Mips.h" |
| 18 | #include "llvm/Target/TargetInstrInfo.h" |
| 19 | #include "MipsRegisterInfo.h" |
| 20 | |
| 21 | namespace llvm { |
| 22 | |
Bruno Cardoso Lopes | 0b2cd89 | 2007-08-18 01:59:45 +0000 | [diff] [blame] | 23 | namespace Mips { |
| 24 | |
Bruno Cardoso Lopes | dc0c04c | 2007-08-28 05:06:17 +0000 | [diff] [blame] | 25 | // Mips Condition Codes |
Bruno Cardoso Lopes | 0b2cd89 | 2007-08-18 01:59:45 +0000 | [diff] [blame] | 26 | enum CondCode { |
| 27 | COND_E, |
| 28 | COND_GZ, |
| 29 | COND_GEZ, |
| 30 | COND_LZ, |
| 31 | COND_LEZ, |
| 32 | COND_NE, |
| 33 | COND_INVALID |
| 34 | }; |
| 35 | |
| 36 | // Turn condition code into conditional branch opcode. |
| 37 | unsigned GetCondBranchFromCond(CondCode CC); |
| 38 | |
| 39 | /// GetOppositeBranchCondition - Return the inverse of the specified cond, |
| 40 | /// e.g. turning COND_E to COND_NE. |
| 41 | CondCode GetOppositeBranchCondition(Mips::CondCode CC); |
| 42 | |
| 43 | } |
| 44 | |
Bruno Cardoso Lopes | 972f589 | 2007-06-06 07:42:06 +0000 | [diff] [blame] | 45 | class MipsInstrInfo : public TargetInstrInfo |
| 46 | { |
| 47 | MipsTargetMachine &TM; |
| 48 | const MipsRegisterInfo RI; |
| 49 | public: |
| 50 | MipsInstrInfo(MipsTargetMachine &TM); |
| 51 | |
| 52 | /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info. As |
| 53 | /// such, whenever a client has an instance of instruction info, it should |
| 54 | /// always be able to get register info as well (through this method). |
| 55 | /// |
| 56 | virtual const MRegisterInfo &getRegisterInfo() const { return RI; } |
| 57 | |
| 58 | /// Return true if the instruction is a register to register move and |
| 59 | /// leave the source and dest operands in the passed parameters. |
| 60 | /// |
| 61 | virtual bool isMoveInstr(const MachineInstr &MI, |
| 62 | unsigned &SrcReg, unsigned &DstReg) const; |
| 63 | |
| 64 | /// isLoadFromStackSlot - If the specified machine instruction is a direct |
| 65 | /// load from a stack slot, return the virtual or physical register number of |
| 66 | /// the destination along with the FrameIndex of the loaded stack slot. If |
| 67 | /// not, return 0. This predicate must return 0 if the instruction has |
| 68 | /// any side effects other than loading from the stack slot. |
| 69 | virtual unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const; |
| 70 | |
| 71 | /// isStoreToStackSlot - If the specified machine instruction is a direct |
| 72 | /// store to a stack slot, return the virtual or physical register number of |
| 73 | /// the source reg along with the FrameIndex of the loaded stack slot. If |
| 74 | /// not, return 0. This predicate must return 0 if the instruction has |
| 75 | /// any side effects other than storing to the stack slot. |
| 76 | virtual unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const; |
Bruno Cardoso Lopes | 0b2cd89 | 2007-08-18 01:59:45 +0000 | [diff] [blame] | 77 | |
| 78 | /// Branch Analysis |
| 79 | virtual bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB, |
| 80 | MachineBasicBlock *&FBB, |
| 81 | std::vector<MachineOperand> &Cond) const; |
| 82 | virtual unsigned RemoveBranch(MachineBasicBlock &MBB) const; |
Bruno Cardoso Lopes | 972f589 | 2007-06-06 07:42:06 +0000 | [diff] [blame] | 83 | virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, |
Bruno Cardoso Lopes | 0b2cd89 | 2007-08-18 01:59:45 +0000 | [diff] [blame] | 84 | MachineBasicBlock *FBB, |
Bruno Cardoso Lopes | 972f589 | 2007-06-06 07:42:06 +0000 | [diff] [blame] | 85 | const std::vector<MachineOperand> &Cond) const; |
Bruno Cardoso Lopes | 0b2cd89 | 2007-08-18 01:59:45 +0000 | [diff] [blame] | 86 | virtual bool BlockHasNoFallThrough(MachineBasicBlock &MBB) const; |
| 87 | virtual bool ReverseBranchCondition(std::vector<MachineOperand> &Cond) const; |
| 88 | |
| 89 | /// Insert nop instruction when hazard condition is found |
| 90 | virtual void insertNoop(MachineBasicBlock &MBB, |
| 91 | MachineBasicBlock::iterator MI) const; |
Bruno Cardoso Lopes | 972f589 | 2007-06-06 07:42:06 +0000 | [diff] [blame] | 92 | }; |
| 93 | |
| 94 | } |
| 95 | |
| 96 | #endif |