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 an AMDGPU target.
13 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
15 #define LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
17 #include "llvm/Target/TargetFrameLowering.h"
21 /// \brief Information about the stack frame layout on the AMDGPU targets.
23 /// It holds the direction of the stack growth, the known stack alignment on
24 /// entry to each function, and the offset to the locals area.
25 /// See TargetFrameInfo for more comments.
26 class AMDGPUFrameLowering : public TargetFrameLowering {
28 AMDGPUFrameLowering(StackDirection D, unsigned StackAl, int LAO,
29 unsigned TransAl = 1);
30 virtual ~AMDGPUFrameLowering();
32 /// \returns The number of 32-bit sub-registers that are used when storing
33 /// values to the stack.
34 unsigned getStackWidth(const MachineFunction &MF) const;
36 int getFrameIndexReference(const MachineFunction &MF, int FI,
37 unsigned &FrameReg) const override;
39 bool hasFP(const MachineFunction &MF) const override {