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
21namespace llvm {
22  class MBlazeSubtarget;
23
24class MBlazeFrameLowering : public TargetFrameLowering {
25protected:
26  const MBlazeSubtarget &STI;
27
28public:
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
54