llvm/lib/Target/DirectX/DirectXFrameLowering.h

   1 //===-- DirectXFrameLowering.h - Frame lowering for DirectX --*- 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 // This class implements DirectX-specific bits of TargetFrameLowering class.
  10 // This is just a stub because the current DXIL backend does not actually lower
  11 // through the MC layer.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef LLVM_DIRECTX_DIRECTXFRAMELOWERING_H
  16 #define LLVM_DIRECTX_DIRECTXFRAMELOWERING_H
  17
  18 #include "llvm/CodeGen/TargetFrameLowering.h"
  19 #include "llvm/Support/Alignment.h"
  20
  21 namespace llvm {
  22 class DirectXSubtarget;
  23
  24 class DirectXFrameLowering : public TargetFrameLowering {
  25 public:
  26   explicit DirectXFrameLowering(const DirectXSubtarget &STI)
  27       : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, Align(8), 0) {}
  28
  29   void emitPrologue(MachineFunction &, MachineBasicBlock &) const override {}
  30   void emitEpilogue(MachineFunction &, MachineBasicBlock &) const override {}
  31
  32   bool hasFP(const MachineFunction &) const override { return false; }
  33 };
  34 } // namespace llvm
  35 #endif // LLVM_DIRECTX_DIRECTXFRAMELOWERING_H