1 //==-- WebAssemblyTargetStreamer.h - WebAssembly Target Streamer -*- 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 /// \file 10 /// This file declares WebAssembly-specific target streamer classes. 11 /// These are for implementing support for target-specific assembly directives. 12 /// 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H 16 #define LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H 17 18 #include "llvm/BinaryFormat/Wasm.h" 19 #include "llvm/CodeGenTypes/MachineValueType.h" 20 #include "llvm/MC/MCStreamer.h" 21 22 namespace llvm { 23 24 class MCSymbolWasm; 25 class formatted_raw_ostream; 26 27 /// WebAssembly-specific streamer interface, to implement support 28 /// WebAssembly-specific assembly directives. 29 class WebAssemblyTargetStreamer : public MCTargetStreamer { 30 public: 31 explicit WebAssemblyTargetStreamer(MCStreamer &S); 32 33 /// .local 34 virtual void emitLocal(ArrayRef<wasm::ValType> Types) = 0; 35 /// .functype 36 virtual void emitFunctionType(const MCSymbolWasm *Sym) = 0; 37 /// .indidx 38 virtual void emitIndIdx(const MCExpr *Value) = 0; 39 /// .globaltype 40 virtual void emitGlobalType(const MCSymbolWasm *Sym) = 0; 41 /// .tabletype 42 virtual void emitTableType(const MCSymbolWasm *Sym) = 0; 43 /// .tagtype 44 virtual void emitTagType(const MCSymbolWasm *Sym) = 0; 45 /// .import_module 46 virtual void emitImportModule(const MCSymbolWasm *Sym, 47 StringRef ImportModule) = 0; 48 /// .import_name 49 virtual void emitImportName(const MCSymbolWasm *Sym, 50 StringRef ImportName) = 0; 51 /// .export_name 52 virtual void emitExportName(const MCSymbolWasm *Sym, 53 StringRef ExportName) = 0; 54 55 protected: 56 void emitValueType(wasm::ValType Type); 57 }; 58 59 /// This part is for ascii assembly output 60 class WebAssemblyTargetAsmStreamer final : public WebAssemblyTargetStreamer { 61 formatted_raw_ostream &OS; 62 63 public: 64 WebAssemblyTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS); 65 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; 75 }; 76 77 /// This part is for Wasm object output 78 class WebAssemblyTargetWasmStreamer final : public WebAssemblyTargetStreamer { 79 public: 80 explicit WebAssemblyTargetWasmStreamer(MCStreamer &S); 81 82 void emitLocal(ArrayRef<wasm::ValType> Types) override; emitFunctionType(const MCSymbolWasm * Sym)83 void emitFunctionType(const MCSymbolWasm *Sym) override {} 84 void emitIndIdx(const MCExpr *Value) override; emitGlobalType(const MCSymbolWasm * Sym)85 void emitGlobalType(const MCSymbolWasm *Sym) override {} emitTableType(const MCSymbolWasm * Sym)86 void emitTableType(const MCSymbolWasm *Sym) override {} emitTagType(const MCSymbolWasm * Sym)87 void emitTagType(const MCSymbolWasm *Sym) override {} emitImportModule(const MCSymbolWasm * Sym,StringRef ImportModule)88 void emitImportModule(const MCSymbolWasm *Sym, 89 StringRef ImportModule) override {} emitImportName(const MCSymbolWasm * Sym,StringRef ImportName)90 void emitImportName(const MCSymbolWasm *Sym, 91 StringRef ImportName) override {} emitExportName(const MCSymbolWasm * Sym,StringRef ExportName)92 void emitExportName(const MCSymbolWasm *Sym, 93 StringRef ExportName) override {} 94 }; 95 96 /// This part is for null output 97 class WebAssemblyTargetNullStreamer final : public WebAssemblyTargetStreamer { 98 public: WebAssemblyTargetNullStreamer(MCStreamer & S)99 explicit WebAssemblyTargetNullStreamer(MCStreamer &S) 100 : WebAssemblyTargetStreamer(S) {} 101 emitLocal(ArrayRef<wasm::ValType>)102 void emitLocal(ArrayRef<wasm::ValType>) override {} emitFunctionType(const MCSymbolWasm *)103 void emitFunctionType(const MCSymbolWasm *) override {} emitIndIdx(const MCExpr *)104 void emitIndIdx(const MCExpr *) override {} emitGlobalType(const MCSymbolWasm *)105 void emitGlobalType(const MCSymbolWasm *) override {} emitTableType(const MCSymbolWasm *)106 void emitTableType(const MCSymbolWasm *) override {} emitTagType(const MCSymbolWasm *)107 void emitTagType(const MCSymbolWasm *) override {} emitImportModule(const MCSymbolWasm *,StringRef)108 void emitImportModule(const MCSymbolWasm *, StringRef) override {} emitImportName(const MCSymbolWasm *,StringRef)109 void emitImportName(const MCSymbolWasm *, StringRef) override {} emitExportName(const MCSymbolWasm *,StringRef)110 void emitExportName(const MCSymbolWasm *, StringRef) override {} 111 }; 112 113 } // end namespace llvm 114 115 #endif 116