1 //===--------------------- AMDGPUFrameLowering.h ----------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 /// \file
11 /// \brief Interface to describe a layout of a stack frame on an AMDGPU target.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
16 #define LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
17 
18 #include "llvm/Target/TargetFrameLowering.h"
19 
20 namespace llvm {
21 
22 /// \brief Information about the stack frame layout on the AMDGPU targets.
23 ///
24 /// It holds the direction of the stack growth, the known stack alignment on
25 /// entry to each function, and the offset to the locals area.
26 /// See TargetFrameInfo for more comments.
27 class AMDGPUFrameLowering : public TargetFrameLowering {
28 public:
29   AMDGPUFrameLowering(StackDirection D, unsigned StackAl, int LAO,
30                       unsigned TransAl = 1);
31   ~AMDGPUFrameLowering() override;
32 
33   /// \returns The number of 32-bit sub-registers that are used when storing
34   /// values to the stack.
35   unsigned getStackWidth(const MachineFunction &MF) const;
36 
37   bool hasFP(const MachineFunction &MF) const override {
38     return false;
39   }
40 };
41 
42 } // end namespace llvm
43 
44 #endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
45