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      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), STI(sti) {
     31   }
     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
     60