1 //===--------------------- AMDGPUFrameLowering.h ----------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief Interface to describe a layout of a stack frame on a AMDIL target
14 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_LIB_TARGET_R600_AMDGPUFRAMELOWERING_H
16 #define LLVM_LIB_TARGET_R600_AMDGPUFRAMELOWERING_H
18 #include "llvm/CodeGen/MachineFunction.h"
19 #include "llvm/Target/TargetFrameLowering.h"
23 /// \brief Information about the stack frame layout on the AMDGPU targets.
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.
28 class AMDGPUFrameLowering : public TargetFrameLowering {
30 AMDGPUFrameLowering(StackDirection D, unsigned StackAl, int LAO,
31 unsigned TransAl = 1);
32 virtual ~AMDGPUFrameLowering();
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;
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;