| 1 | //===-- SPIRVFrameLowering.h - Define frame lowering for SPIR-V -*- C++-*--===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This class implements SPIRV-specific bits of TargetFrameLowering class. |
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| 10 | // The target uses only virtual registers. It does not operate with stack frame |
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| 11 | // explicitly and does not generate prologues/epilogues of functions. |
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| 12 | // As a result, we are not required to implemented the frame lowering |
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| 13 | // functionality substantially. |
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| 14 | // |
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| 15 | //===----------------------------------------------------------------------===// |
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| 16 | |
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| 17 | #ifndef LLVM_LIB_TARGET_SPIRV_SPIRVFRAMELOWERING_H |
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| 18 | #define LLVM_LIB_TARGET_SPIRV_SPIRVFRAMELOWERING_H |
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| 19 | |
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| 20 | #include "llvm/CodeGen/TargetFrameLowering.h" |
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| 21 | #include "llvm/Support/Alignment.h" |
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| 22 | |
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| 23 | namespace llvm { |
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| 24 | class SPIRVSubtarget; |
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| 25 | |
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| 26 | class SPIRVFrameLowering : public TargetFrameLowering { |
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| 27 | public: |
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| 28 | explicit SPIRVFrameLowering(const SPIRVSubtarget &sti) |
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| 29 | : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, Align(8), 0) {} |
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| 30 | |
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| 31 | void emitPrologue(MachineFunction &MF, |
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| 32 | MachineBasicBlock &MBB) const override {} |
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| 33 | void emitEpilogue(MachineFunction &MF, |
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| 34 | MachineBasicBlock &MBB) const override {} |
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| 35 | |
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| 36 | bool hasFP(const MachineFunction &MF) const override { return false; } |
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| 37 | }; |
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| 38 | } // namespace llvm |
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| 39 | #endif // LLVM_LIB_TARGET_SPIRV_SPIRVFRAMELOWERING_H |
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| 40 | |
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