AMDGPUFrameLowering.h revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f 
1//===--------------------- AMDGPUFrameLowering.h ----------------*- 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/// \file
11/// \brief Interface to describe a layout of a stack frame on a AMDIL target
12/// machine.
13//
14//===----------------------------------------------------------------------===//
15#ifndef AMDILFRAME_LOWERING_H
16#define AMDILFRAME_LOWERING_H
17
18#include "llvm/CodeGen/MachineFunction.h"
19#include "llvm/Target/TargetFrameLowering.h"
20
21namespace llvm {
22
23/// \brief Information about the stack frame layout on the AMDGPU targets.
24///
25/// It holds the direction of the stack growth, the known stack alignment on
26/// entry to each function, and the offset to the locals area.
27/// See TargetFrameInfo for more comments.
28class AMDGPUFrameLowering : public TargetFrameLowering {
29public:
30  AMDGPUFrameLowering(StackDirection D, unsigned StackAl, int LAO,
31                      unsigned TransAl = 1);
32  virtual ~AMDGPUFrameLowering();
33
34  /// \returns The number of 32-bit sub-registers that are used when storing
35  /// values to the stack.
36  unsigned getStackWidth(const MachineFunction &MF) const;
37  int getFrameIndexOffset(const MachineFunction &MF, int FI) const override;
38  const SpillSlot *
39    getCalleeSavedSpillSlots(unsigned &NumEntries) const override;
40  void emitPrologue(MachineFunction &MF) const override;
41  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
42  bool hasFP(const MachineFunction &MF) const override;
43};
44} // namespace llvm
45#endif // AMDILFRAME_LOWERING_H
46