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/MC/MCStreamer.h" 20 #include "llvm/Support/MachineValueType.h" 21 22 namespace llvm { 23 24 class MCSymbolWasm; 25 26 /// WebAssembly-specific streamer interface, to implement support 27 /// WebAssembly-specific assembly directives. 28 class WebAssemblyTargetStreamer : public MCTargetStreamer { 29 public: 30 explicit WebAssemblyTargetStreamer(MCStreamer &S); 31 32 /// .local 33 virtual void emitLocal(ArrayRef<wasm::ValType> Types) = 0; 34 /// .endfunc 35 virtual void emitEndFunc() = 0; 36 /// .functype 37 virtual void emitFunctionType(const MCSymbolWasm *Sym) = 0; 38 /// .indidx 39 virtual void emitIndIdx(const MCExpr *Value) = 0; 40 /// .globaltype 41 virtual void emitGlobalType(const MCSymbolWasm *Sym) = 0; 42 /// .eventtype 43 virtual void emitEventType(const MCSymbolWasm *Sym) = 0; 44 /// .import_module 45 virtual void emitImportModule(const MCSymbolWasm *Sym, 46 StringRef ImportModule) = 0; 47 /// .import_name 48 virtual void emitImportName(const MCSymbolWasm *Sym, 49 StringRef ImportName) = 0; 50 /// .export_name 51 virtual void emitExportName(const MCSymbolWasm *Sym, 52 StringRef ExportName) = 0; 53 54 protected: 55 void emitValueType(wasm::ValType Type); 56 }; 57 58 /// This part is for ascii assembly output 59 class WebAssemblyTargetAsmStreamer final : public WebAssemblyTargetStreamer { 60 formatted_raw_ostream &OS; 61 62 public: 63 WebAssemblyTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS); 64 65 void emitLocal(ArrayRef<wasm::ValType> Types) override; 66 void emitEndFunc() override; 67 void emitFunctionType(const MCSymbolWasm *Sym) override; 68 void emitIndIdx(const MCExpr *Value) override; 69 void emitGlobalType(const MCSymbolWasm *Sym) override; 70 void emitEventType(const MCSymbolWasm *Sym) override; 71 void emitImportModule(const MCSymbolWasm *Sym, StringRef ImportModule) override; 72 void emitImportName(const MCSymbolWasm *Sym, StringRef ImportName) override; 73 void emitExportName(const MCSymbolWasm *Sym, StringRef ExportName) override; 74 }; 75 76 /// This part is for Wasm object output 77 class WebAssemblyTargetWasmStreamer final : public WebAssemblyTargetStreamer { 78 public: 79 explicit WebAssemblyTargetWasmStreamer(MCStreamer &S); 80 81 void emitLocal(ArrayRef<wasm::ValType> Types) override; 82 void emitEndFunc() override; 83 void emitFunctionType(const MCSymbolWasm *Sym) override {} 84 void emitIndIdx(const MCExpr *Value) override; 85 void emitGlobalType(const MCSymbolWasm *Sym) override {} 86 void emitEventType(const MCSymbolWasm *Sym) override {} 87 void emitImportModule(const MCSymbolWasm *Sym, 88 StringRef ImportModule) override {} 89 void emitImportName(const MCSymbolWasm *Sym, 90 StringRef ImportName) override {} 91 void emitExportName(const MCSymbolWasm *Sym, 92 StringRef ExportName) override {} 93 }; 94 95 /// This part is for null output 96 class WebAssemblyTargetNullStreamer final : public WebAssemblyTargetStreamer { 97 public: 98 explicit WebAssemblyTargetNullStreamer(MCStreamer &S) 99 : WebAssemblyTargetStreamer(S) {} 100 101 void emitLocal(ArrayRef<wasm::ValType>) override {} 102 void emitEndFunc() override {} 103 void emitFunctionType(const MCSymbolWasm *) override {} 104 void emitIndIdx(const MCExpr *) override {} 105 void emitGlobalType(const MCSymbolWasm *) override {} 106 void emitEventType(const MCSymbolWasm *) override {} 107 void emitImportModule(const MCSymbolWasm *, StringRef) override {} 108 void emitImportName(const MCSymbolWasm *, StringRef) override {} 109 void emitExportName(const MCSymbolWasm *, StringRef) override {} 110 }; 111 112 } // end namespace llvm 113 114 #endif 115