lib/Target/AMDGPU/AMDGPUFrameLowering.h

   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::None());
  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