lib/Target/MSP430/MSP430FrameLowering.h

   1 //==- MSP430FrameLowering.h - Define frame lowering for MSP430 --*- 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 //
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef MSP430_FRAMEINFO_H
  15 #define MSP430_FRAMEINFO_H
  16
  17 #include "MSP430.h"
  18 #include "MSP430Subtarget.h"
  19 #include "llvm/Target/TargetFrameLowering.h"
  20
  21 namespace llvm {
  22   class MSP430Subtarget;
  23
  24 class MSP430FrameLowering : public TargetFrameLowering {
  25 protected:
  26   const MSP430Subtarget &STI;
  27
  28 public:
  29   explicit MSP430FrameLowering(const MSP430Subtarget &sti)
  30     : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 2, -2, 2),
  31       STI(sti) {}
  32
  33   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
  34   /// the function.
  35   void emitPrologue(MachineFunction &MF) const;
  36   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
  37
  38   void eliminateCallFramePseudoInstr(MachineFunction &MF,
  39                                      MachineBasicBlock &MBB,
  40                                      MachineBasicBlock::iterator I) const;
  41
  42   bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
  43                                  MachineBasicBlock::iterator MI,
  44                                  const std::vector<CalleeSavedInfo> &CSI,
  45                                  const TargetRegisterInfo *TRI) const;
  46   bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
  47                                    MachineBasicBlock::iterator MI,
  48                                    const std::vector<CalleeSavedInfo> &CSI,
  49                                    const TargetRegisterInfo *TRI) const;
  50
  51   bool hasFP(const MachineFunction &MF) const;
  52   bool hasReservedCallFrame(const MachineFunction &MF) const;
  53   void processFunctionBeforeFrameFinalized(MachineFunction &MF,
  54                                        RegScavenger *RS = NULL) const;
  55 };
  56
  57 } // End llvm namespace
  58
  59 #endif