2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
//==-- WebAssemblyTargetStreamer.h - WebAssembly Target Streamer -*- C++ -*-==//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file declares WebAssembly-specific target streamer classes.
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/// These are for implementing support for target-specific assembly directives.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H
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#define LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H
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#include "llvm/BinaryFormat/Wasm.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/Support/MachineValueType.h"
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namespace llvm {
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class MCWasmStreamer;
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class MCSymbolWasm;
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/// WebAssembly-specific streamer interface, to implement support
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/// WebAssembly-specific assembly directives.
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class WebAssemblyTargetStreamer : public MCTargetStreamer {
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public:
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explicit WebAssemblyTargetStreamer(MCStreamer &S);
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/// .local
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virtual void emitLocal(ArrayRef<wasm::ValType> Types) = 0;
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/// .endfunc
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virtual void emitEndFunc() = 0;
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/// .functype
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virtual void emitFunctionType(const MCSymbolWasm *Sym) = 0;
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/// .indidx
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virtual void emitIndIdx(const MCExpr *Value) = 0;
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/// .globaltype
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virtual void emitGlobalType(const MCSymbolWasm *Sym) = 0;
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/// .eventtype
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virtual void emitEventType(const MCSymbolWasm *Sym) = 0;
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/// .import_module
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virtual void emitImportModule(const MCSymbolWasm *Sym,
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StringRef ModuleName) = 0;
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protected:
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void emitValueType(wasm::ValType Type);
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};
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/// This part is for ascii assembly output
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class WebAssemblyTargetAsmStreamer final : public WebAssemblyTargetStreamer {
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formatted_raw_ostream &OS;
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void emitSignature(const wasm::WasmSignature *Sig);
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void emitParamList(const wasm::WasmSignature *Sig);
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void emitReturnList(const wasm::WasmSignature *Sig);
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public:
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WebAssemblyTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS);
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void emitLocal(ArrayRef<wasm::ValType> Types) override;
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void emitEndFunc() override;
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void emitFunctionType(const MCSymbolWasm *Sym) override;
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void emitIndIdx(const MCExpr *Value) override;
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void emitGlobalType(const MCSymbolWasm *Sym) override;
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void emitEventType(const MCSymbolWasm *Sym) override;
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void emitImportModule(const MCSymbolWasm *Sym, StringRef ModuleName) override;
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};
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/// This part is for Wasm object output
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class WebAssemblyTargetWasmStreamer final : public WebAssemblyTargetStreamer {
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public:
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explicit WebAssemblyTargetWasmStreamer(MCStreamer &S);
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void emitLocal(ArrayRef<wasm::ValType> Types) override;
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void emitEndFunc() override;
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void emitFunctionType(const MCSymbolWasm *Sym) override {}
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void emitIndIdx(const MCExpr *Value) override;
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void emitGlobalType(const MCSymbolWasm *Sym) override {}
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void emitEventType(const MCSymbolWasm *Sym) override {}
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void emitImportModule(const MCSymbolWasm *Sym,
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StringRef ModuleName) override {}
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};
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/// This part is for null output
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class WebAssemblyTargetNullStreamer final : public WebAssemblyTargetStreamer {
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public:
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explicit WebAssemblyTargetNullStreamer(MCStreamer &S)
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: WebAssemblyTargetStreamer(S) {}
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void emitLocal(ArrayRef<wasm::ValType>) override {}
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void emitEndFunc() override {}
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void emitFunctionType(const MCSymbolWasm *) override {}
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void emitIndIdx(const MCExpr *) override {}
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void emitGlobalType(const MCSymbolWasm *) override {}
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void emitEventType(const MCSymbolWasm *) override {}
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void emitImportModule(const MCSymbolWasm *, StringRef) override {}
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};
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} // end namespace llvm
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#endif
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