1 //===--------------------- AMDGPUFrameLowering.h ----------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 /// \file
10 /// Interface to describe a layout of a stack frame on an AMDGPU target.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
15 #define LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
16 
17 #include "llvm/CodeGen/TargetFrameLowering.h"
18 
19 namespace llvm {
20 
21 /// Information about the stack frame layout on the AMDGPU targets.
22 ///
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 {
27 public:
28   AMDGPUFrameLowering(StackDirection D, Align StackAl, int LAO,
29                       Align TransAl = Align(1));
30   ~AMDGPUFrameLowering() override;
31 
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;
35 };
36 
37 } // end namespace llvm
38 
39 #endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
40