lib/Target/AMDGPU/AMDGPUFrameLowering.h

   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 /// 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/CodeGen/TargetFrameLowering.h"
  19
  20 namespace llvm {
  21
  22 /// 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
  38 } // end namespace llvm
  39
  40 #endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H