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 
23 namespace llvm {
24 class SPIRVSubtarget;
25 
26 class SPIRVFrameLowering : public TargetFrameLowering {
27 public:
SPIRVFrameLowering(const SPIRVSubtarget & sti)28   explicit SPIRVFrameLowering(const SPIRVSubtarget &sti)
29       : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, Align(8), 0) {}
30 
emitPrologue(MachineFunction & MF,MachineBasicBlock & MBB)31   void emitPrologue(MachineFunction &MF,
32                     MachineBasicBlock &MBB) const override {}
emitEpilogue(MachineFunction & MF,MachineBasicBlock & MBB)33   void emitEpilogue(MachineFunction &MF,
34                     MachineBasicBlock &MBB) const override {}
35 
hasFP(const MachineFunction & MF)36   bool hasFP(const MachineFunction &MF) const override { return false; }
37 };
38 } // namespace llvm
39 #endif // LLVM_LIB_TARGET_SPIRV_SPIRVFRAMELOWERING_H
40