lib/Target/MBlaze/MBlazeFrameLowering.h

   1 //=- MBlazeFrameLowering.h - Define frame lowering for MicroBlaze -*- 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 MBLAZE_FRAMEINFO_H
  15 #define MBLAZE_FRAMEINFO_H
  16
  17 #include "MBlaze.h"
  18 #include "MBlazeSubtarget.h"
  19 #include "llvm/Target/TargetFrameLowering.h"
  20
  21 namespace llvm {
  22   class MBlazeSubtarget;
  23
  24 class MBlazeFrameLowering : public TargetFrameLowering {
  25 protected:
  26   const MBlazeSubtarget &STI;
  27
  28 public:
  29   explicit MBlazeFrameLowering(const MBlazeSubtarget &sti)
  30     : TargetFrameLowering(TargetFrameLowering::StackGrowsUp, 4, 0), STI(sti) {
  31   }
  32
  33   /// targetHandlesStackFrameRounding - Returns true if the target is
  34   /// responsible for rounding up the stack frame (probably at emitPrologue
  35   /// time).
  36   bool targetHandlesStackFrameRounding() const { return true; }
  37
  38   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
  39   /// the function.
  40   void emitPrologue(MachineFunction &MF) const;
  41   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
  42
  43   bool hasFP(const MachineFunction &MF) const;
  44
  45   int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
  46
  47   virtual void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
  48                                                     RegScavenger *RS) const;
  49 };
  50
  51 } // End llvm namespace
  52
  53 #endif