1//===-- SPIRVFrameLowering.h - Define frame lowering for SPIR-V -*- 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 SPIRV-specific bits of TargetFrameLowering class.
10// The target uses only virtual registers. It does not operate with stack frame
11// explicitly and does not generate prologues/epilogues of functions.
12// As a result, we are not required to implemented the frame lowering
13// functionality substantially.
14//
15//===----------------------------------------------------------------------===//
16
17#ifndef LLVM_LIB_TARGET_SPIRV_SPIRVFRAMELOWERING_H
18#define LLVM_LIB_TARGET_SPIRV_SPIRVFRAMELOWERING_H
19
20#include "llvm/CodeGen/TargetFrameLowering.h"
21#include "llvm/Support/Alignment.h"
22
23namespace llvm {
24class SPIRVSubtarget;
25
26class SPIRVFrameLowering : public TargetFrameLowering {
27public:
28 explicit SPIRVFrameLowering(const SPIRVSubtarget &sti)
29 : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, Align(8), 0) {}
30
31 void emitPrologue(MachineFunction &MF,
32 MachineBasicBlock &MBB) const override {}
33 void emitEpilogue(MachineFunction &MF,
34 MachineBasicBlock &MBB) const override {}
35
36protected:
37 bool hasFPImpl(const MachineFunction &MF) const override { return false; }
38};
39} // namespace llvm
40#endif // LLVM_LIB_TARGET_SPIRV_SPIRVFRAMELOWERING_H
41