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 #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
15 #define LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H
16 
17 #include "llvm/Target/TargetFrameLowering.h"
18 
19 namespace llvm {
20 
21 /// \brief 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, unsigned StackAl, int LAO,
29                       unsigned TransAl = 1);
30   virtual ~AMDGPUFrameLowering();
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   int getFrameIndexReference(const MachineFunction &MF, int FI,
37                              unsigned &FrameReg) const override;
38 
hasFP(const MachineFunction & MF)39   bool hasFP(const MachineFunction &MF) const override {
40     return false;
41   }
42 };
43 } // namespace llvm
44 #endif
45