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//===--------------------- AMDGPUFrameLowering.h ----------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
/// \file
/// \brief Interface to describe a layout of a stack frame on a AMDIL target
/// machine.
//
//===----------------------------------------------------------------------===//
#ifndef AMDILFRAME_LOWERING_H
#define AMDILFRAME_LOWERING_H
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/Target/TargetFrameLowering.h"
namespace llvm {
/// \brief Information about the stack frame layout on the AMDGPU targets.
///
/// It holds the direction of the stack growth, the known stack alignment on
/// entry to each function, and the offset to the locals area.
/// See TargetFrameInfo for more comments.
class AMDGPUFrameLowering : public TargetFrameLowering {
public:
AMDGPUFrameLowering(StackDirection D, unsigned StackAl, int LAO,
unsigned TransAl = 1);
virtual ~AMDGPUFrameLowering();
/// \returns The number of 32-bit sub-registers that are used when storing
/// values to the stack.
unsigned getStackWidth(const MachineFunction &MF) const;
int getFrameIndexOffset(const MachineFunction &MF, int FI) const override;
const SpillSlot *
getCalleeSavedSpillSlots(unsigned &NumEntries) const override;
void emitPrologue(MachineFunction &MF) const override;
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
bool hasFP(const MachineFunction &MF) const override;
};
} // namespace llvm
#endif // AMDILFRAME_LOWERING_H
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