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