lib/Target/Blackfin/BlackfinFrameLowering.h

   1 //=- BlackfinFrameLowering.h - Define frame lowering for Blackfin -*- 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 ALPHA_FRAMEINFO_H
  15 #define ALPHA_FRAMEINFO_H
  16
  17 #include "Blackfin.h"
  18 #include "BlackfinSubtarget.h"
  19 #include "llvm/Target/TargetFrameLowering.h"
  20
  21 namespace llvm {
  22   class BlackfinSubtarget;
  23
  24 class BlackfinFrameLowering : public TargetFrameLowering {
  25 protected:
  26   const BlackfinSubtarget &STI;
  27
  28 public:
  29   explicit BlackfinFrameLowering(const BlackfinSubtarget &sti)
  30     : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 4, 0), 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   bool hasFP(const MachineFunction &MF) const;
  39   bool hasReservedCallFrame(const MachineFunction &MF) const;
  40
  41   void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
  42                                             RegScavenger *RS) const;
  43 };
  44
  45 } // End llvm namespace
  46
  47 #endif