lib/Target/ARM/Thumb1RegisterInfo.h

   1 //===- Thumb1RegisterInfo.h - Thumb-1 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 Thumb-1 implementation of the TargetRegisterInfo
  11 // class.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef THUMB1REGISTERINFO_H
  16 #define THUMB1REGISTERINFO_H
  17
  18 #include "ARM.h"
  19 #include "ARMRegisterInfo.h"
  20 #include "llvm/Target/TargetRegisterInfo.h"
  21
  22 namespace llvm {
  23   class ARMSubtarget;
  24   class ARMBaseInstrInfo;
  25   class Type;
  26
  27 struct Thumb1RegisterInfo : public ARMBaseRegisterInfo {
  28 public:
  29   Thumb1RegisterInfo(const ARMBaseInstrInfo &tii, const ARMSubtarget &STI);
  30
  31   /// emitLoadConstPool - Emits a load from constpool to materialize the
  32   /// specified immediate.
  33  void emitLoadConstPool(MachineBasicBlock &MBB,
  34                         MachineBasicBlock::iterator &MBBI,
  35                         DebugLoc dl,
  36                         unsigned DestReg, unsigned SubIdx, int Val,
  37                         ARMCC::CondCodes Pred = ARMCC::AL,
  38                         unsigned PredReg = 0) const;
  39
  40   /// Code Generation virtual methods...
  41   bool hasReservedCallFrame(const MachineFunction &MF) const;
  42
  43   void eliminateCallFramePseudoInstr(MachineFunction &MF,
  44                                      MachineBasicBlock &MBB,
  45                                      MachineBasicBlock::iterator I) const;
  46
  47   // rewrite MI to access 'Offset' bytes from the FP. Update Offset to be
  48   // however much remains to be handled. Return 'true' if no further
  49   // work is required.
  50   bool rewriteFrameIndex(MachineBasicBlock::iterator II, unsigned FrameRegIdx,
  51                          unsigned FrameReg, int &Offset,
  52                          const ARMBaseInstrInfo &TII) const;
  53   void resolveFrameIndex(MachineBasicBlock::iterator I,
  54                          unsigned BaseReg, int64_t Offset) const;
  55   bool saveScavengerRegister(MachineBasicBlock &MBB,
  56                              MachineBasicBlock::iterator I,
  57                              MachineBasicBlock::iterator &UseMI,
  58                              const TargetRegisterClass *RC,
  59                              unsigned Reg) const;
  60   unsigned eliminateFrameIndex(MachineBasicBlock::iterator II,
  61                                int SPAdj, FrameIndexValue *Value = NULL,
  62                                RegScavenger *RS = NULL) const;
  63
  64   void emitPrologue(MachineFunction &MF) const;
  65   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
  66 };
  67 }
  68
  69 #endif // THUMB1REGISTERINFO_H