Line data    Source code

       1             : //===-- Thumb2InstrInfo.h - Thumb-2 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 Thumb-2 implementation of the TargetInstrInfo class.
      11             : //
      12             : //===----------------------------------------------------------------------===//
      13             : 
      14             : #ifndef LLVM_LIB_TARGET_ARM_THUMB2INSTRINFO_H
      15             : #define LLVM_LIB_TARGET_ARM_THUMB2INSTRINFO_H
      16             : 
      17             : #include "ARMBaseInstrInfo.h"
      18             : #include "ThumbRegisterInfo.h"
      19             : 
      20             : namespace llvm {
      21             : class ARMSubtarget;
      22             : class ScheduleHazardRecognizer;
      23             : 
      24             : class Thumb2InstrInfo : public ARMBaseInstrInfo {
      25             :   ThumbRegisterInfo RI;
      26             : public:
      27             :   explicit Thumb2InstrInfo(const ARMSubtarget &STI);
      28             : 
      29             :   /// Return the noop instruction to use for a noop.
      30             :   void getNoop(MCInst &NopInst) const override;
      31             : 
      32             :   // Return the non-pre/post incrementing version of 'Opc'. Return 0
      33             :   // if there is not such an opcode.
      34             :   unsigned getUnindexedOpcode(unsigned Opc) const override;
      35             : 
      36             :   void ReplaceTailWithBranchTo(MachineBasicBlock::iterator Tail,
      37             :                                MachineBasicBlock *NewDest) const override;
      38             : 
      39             :   bool isLegalToSplitMBBAt(MachineBasicBlock &MBB,
      40             :                            MachineBasicBlock::iterator MBBI) const override;
      41             : 
      42             :   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
      43             :                    const DebugLoc &DL, unsigned DestReg, unsigned SrcReg,
      44             :                    bool KillSrc) const override;
      45             : 
      46             :   void storeRegToStackSlot(MachineBasicBlock &MBB,
      47             :                            MachineBasicBlock::iterator MBBI,
      48             :                            unsigned SrcReg, bool isKill, int FrameIndex,
      49             :                            const TargetRegisterClass *RC,
      50             :                            const TargetRegisterInfo *TRI) const override;
      51             : 
      52             :   void loadRegFromStackSlot(MachineBasicBlock &MBB,
      53             :                             MachineBasicBlock::iterator MBBI,
      54             :                             unsigned DestReg, int FrameIndex,
      55             :                             const TargetRegisterClass *RC,
      56             :                             const TargetRegisterInfo *TRI) const override;
      57             : 
      58             :   /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
      59             :   /// such, whenever a client has an instance of instruction info, it should
      60             :   /// always be able to get register info as well (through this method).
      61             :   ///
      62      975230 :   const ThumbRegisterInfo &getRegisterInfo() const override { return RI; }
      63             : 
      64             : private:
      65             :   void expandLoadStackGuard(MachineBasicBlock::iterator MI) const override;
      66             : };
      67             : 
      68             : /// getITInstrPredicate - Valid only in Thumb2 mode. This function is identical
      69             : /// to llvm::getInstrPredicate except it returns AL for conditional branch
      70             : /// instructions which are "predicated", but are not in IT blocks.
      71             : ARMCC::CondCodes getITInstrPredicate(const MachineInstr &MI, unsigned &PredReg);
      72             : }
      73             : 
      74             : #endif