1 //==-- WebAssemblyTargetStreamer.h - WebAssembly Target Streamer -*- C++ -*-==//
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
7 //===----------------------------------------------------------------------===//
10 /// This file declares WebAssembly-specific target streamer classes.
11 /// These are for implementing support for target-specific assembly directives.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H
16 #define LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H
18 #include "llvm/BinaryFormat/Wasm.h"
19 #include "llvm/MC/MCStreamer.h"
20 #include "llvm/Support/MachineValueType.h"
25 class formatted_raw_ostream;
27 /// WebAssembly-specific streamer interface, to implement support
28 /// WebAssembly-specific assembly directives.
29 class WebAssemblyTargetStreamer : public MCTargetStreamer {
31 explicit WebAssemblyTargetStreamer(MCStreamer &S);
34 virtual void emitLocal(ArrayRef<wasm::ValType> Types) = 0;
36 virtual void emitFunctionType(const MCSymbolWasm *Sym) = 0;
38 virtual void emitIndIdx(const MCExpr *Value) = 0;
40 virtual void emitGlobalType(const MCSymbolWasm *Sym) = 0;
42 virtual void emitTableType(const MCSymbolWasm *Sym) = 0;
44 virtual void emitTagType(const MCSymbolWasm *Sym) = 0;
46 virtual void emitImportModule(const MCSymbolWasm *Sym,
47 StringRef ImportModule) = 0;
49 virtual void emitImportName(const MCSymbolWasm *Sym,
50 StringRef ImportName) = 0;
52 virtual void emitExportName(const MCSymbolWasm *Sym,
53 StringRef ExportName) = 0;
56 void emitValueType(wasm::ValType Type);
59 /// This part is for ascii assembly output
60 class WebAssemblyTargetAsmStreamer final : public WebAssemblyTargetStreamer {
61 formatted_raw_ostream &OS;
64 WebAssemblyTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS);
66 void emitLocal(ArrayRef<wasm::ValType> Types) override;
67 void emitFunctionType(const MCSymbolWasm *Sym) override;
68 void emitIndIdx(const MCExpr *Value) override;
69 void emitGlobalType(const MCSymbolWasm *Sym) override;
70 void emitTableType(const MCSymbolWasm *Sym) override;
71 void emitTagType(const MCSymbolWasm *Sym) override;
72 void emitImportModule(const MCSymbolWasm *Sym, StringRef ImportModule) override;
73 void emitImportName(const MCSymbolWasm *Sym, StringRef ImportName) override;
74 void emitExportName(const MCSymbolWasm *Sym, StringRef ExportName) override;
77 /// This part is for Wasm object output
78 class WebAssemblyTargetWasmStreamer final : public WebAssemblyTargetStreamer {
80 explicit WebAssemblyTargetWasmStreamer(MCStreamer &S);
82 void emitLocal(ArrayRef<wasm::ValType> Types) override;
83 void emitFunctionType(const MCSymbolWasm *Sym) override {}
84 void emitIndIdx(const MCExpr *Value) override;
85 void emitGlobalType(const MCSymbolWasm *Sym) override {}
86 void emitTableType(const MCSymbolWasm *Sym) override {}
87 void emitTagType(const MCSymbolWasm *Sym) override {}
88 void emitImportModule(const MCSymbolWasm *Sym,
89 StringRef ImportModule) override {}
90 void emitImportName(const MCSymbolWasm *Sym,
91 StringRef ImportName) override {}
92 void emitExportName(const MCSymbolWasm *Sym,
93 StringRef ExportName) override {}
96 /// This part is for null output
97 class WebAssemblyTargetNullStreamer final : public WebAssemblyTargetStreamer {
99 explicit WebAssemblyTargetNullStreamer(MCStreamer &S)
100 : WebAssemblyTargetStreamer(S) {}
102 void emitLocal(ArrayRef<wasm::ValType>) override {}
103 void emitFunctionType(const MCSymbolWasm *) override {}
104 void emitIndIdx(const MCExpr *) override {}
105 void emitGlobalType(const MCSymbolWasm *) override {}
106 void emitTableType(const MCSymbolWasm *) override {}
107 void emitTagType(const MCSymbolWasm *) override {}
108 void emitImportModule(const MCSymbolWasm *, StringRef) override {}
109 void emitImportName(const MCSymbolWasm *, StringRef) override {}
110 void emitExportName(const MCSymbolWasm *, StringRef) override {}
113 } // end namespace llvm