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annotate lib/Target/AMDGPU/AMDGPUFrameLowering.h @ 100:7d135dc70f03

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LLVM 3.9
author Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
date Tue, 26 Jan 2016 22:53:40 +0900
parents afa8332a0e37
children 1172e4bd9c6f
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1 //===--------------------- AMDGPUFrameLowering.h ----------------*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 /// \file
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11 /// \brief Interface to describe a layout of a stack frame on an AMDGPU target.
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12 //
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13 //===----------------------------------------------------------------------===//
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14 #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
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15 #define LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
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16
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17 #include "llvm/Target/TargetFrameLowering.h"
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18
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19 namespace llvm {
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20
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21 /// \brief Information about the stack frame layout on the AMDGPU targets.
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22 ///
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23 /// It holds the direction of the stack growth, the known stack alignment on
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24 /// entry to each function, and the offset to the locals area.
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25 /// See TargetFrameInfo for more comments.
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26 class AMDGPUFrameLowering : public TargetFrameLowering {
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27 public:
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28 AMDGPUFrameLowering(StackDirection D, unsigned StackAl, int LAO,
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29 unsigned TransAl = 1);
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30 virtual ~AMDGPUFrameLowering();
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31
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32 /// \returns The number of 32-bit sub-registers that are used when storing
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33 /// values to the stack.
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34 unsigned getStackWidth(const MachineFunction &MF) const;
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35 int getFrameIndexReference(const MachineFunction &MF, int FI,
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36 unsigned &FrameReg) const override;
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37 const SpillSlot *
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38 getCalleeSavedSpillSlots(unsigned &NumEntries) const override;
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39 void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
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40 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
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41 bool hasFP(const MachineFunction &MF) const override;
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42 };
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43 } // namespace llvm
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44 #endif