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//==-- WebAssemblyTargetStreamer.h - WebAssembly Target Streamer -*- C++ -*-==//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file declares WebAssembly-specific target streamer classes.
/// These are for implementing support for target-specific assembly directives.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H
#define LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H
#include "llvm/BinaryFormat/Wasm.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Support/MachineValueType.h"
namespace llvm {
class MCSymbolWasm;
class formatted_raw_ostream;
/// WebAssembly-specific streamer interface, to implement support
/// WebAssembly-specific assembly directives.
class WebAssemblyTargetStreamer : public MCTargetStreamer {
public:
explicit WebAssemblyTargetStreamer(MCStreamer &S);
/// .local
virtual void emitLocal(ArrayRef<wasm::ValType> Types) = 0;
/// .functype
virtual void emitFunctionType(const MCSymbolWasm *Sym) = 0;
/// .indidx
virtual void emitIndIdx(const MCExpr *Value) = 0;
/// .globaltype
virtual void emitGlobalType(const MCSymbolWasm *Sym) = 0;
/// .tabletype
virtual void emitTableType(const MCSymbolWasm *Sym) = 0;
/// .tagtype
virtual void emitTagType(const MCSymbolWasm *Sym) = 0;
/// .import_module
virtual void emitImportModule(const MCSymbolWasm *Sym,
StringRef ImportModule) = 0;
/// .import_name
virtual void emitImportName(const MCSymbolWasm *Sym,
StringRef ImportName) = 0;
/// .export_name
virtual void emitExportName(const MCSymbolWasm *Sym,
StringRef ExportName) = 0;
protected:
void emitValueType(wasm::ValType Type);
};
/// This part is for ascii assembly output
class WebAssemblyTargetAsmStreamer final : public WebAssemblyTargetStreamer {
formatted_raw_ostream &OS;
public:
WebAssemblyTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS);
void emitLocal(ArrayRef<wasm::ValType> Types) override;
void emitFunctionType(const MCSymbolWasm *Sym) override;
void emitIndIdx(const MCExpr *Value) override;
void emitGlobalType(const MCSymbolWasm *Sym) override;
void emitTableType(const MCSymbolWasm *Sym) override;
void emitTagType(const MCSymbolWasm *Sym) override;
void emitImportModule(const MCSymbolWasm *Sym, StringRef ImportModule) override;
void emitImportName(const MCSymbolWasm *Sym, StringRef ImportName) override;
void emitExportName(const MCSymbolWasm *Sym, StringRef ExportName) override;
};
/// This part is for Wasm object output
class WebAssemblyTargetWasmStreamer final : public WebAssemblyTargetStreamer {
public:
explicit WebAssemblyTargetWasmStreamer(MCStreamer &S);
void emitLocal(ArrayRef<wasm::ValType> Types) override;
void emitFunctionType(const MCSymbolWasm *Sym) override {}
void emitIndIdx(const MCExpr *Value) override;
void emitGlobalType(const MCSymbolWasm *Sym) override {}
void emitTableType(const MCSymbolWasm *Sym) override {}
void emitTagType(const MCSymbolWasm *Sym) override {}
void emitImportModule(const MCSymbolWasm *Sym,
StringRef ImportModule) override {}
void emitImportName(const MCSymbolWasm *Sym,
StringRef ImportName) override {}
void emitExportName(const MCSymbolWasm *Sym,
StringRef ExportName) override {}
};
/// This part is for null output
class WebAssemblyTargetNullStreamer final : public WebAssemblyTargetStreamer {
public:
explicit WebAssemblyTargetNullStreamer(MCStreamer &S)
: WebAssemblyTargetStreamer(S) {}
void emitLocal(ArrayRef<wasm::ValType>) override {}
void emitFunctionType(const MCSymbolWasm *) override {}
void emitIndIdx(const MCExpr *) override {}
void emitGlobalType(const MCSymbolWasm *) override {}
void emitTableType(const MCSymbolWasm *) override {}
void emitTagType(const MCSymbolWasm *) override {}
void emitImportModule(const MCSymbolWasm *, StringRef) override {}
void emitImportName(const MCSymbolWasm *, StringRef) override {}
void emitExportName(const MCSymbolWasm *, StringRef) override {}
};
} // end namespace llvm
#endif
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