1 //===-- WebAssemblyMCTargetDesc.cpp - WebAssembly Target Descriptions -----===// 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 provides WebAssembly-specific target descriptions. 11 /// 12 //===----------------------------------------------------------------------===// 13 14 #include "MCTargetDesc/WebAssemblyMCTargetDesc.h" 15 #include "MCTargetDesc/WebAssemblyInstPrinter.h" 16 #include "MCTargetDesc/WebAssemblyMCAsmInfo.h" 17 #include "MCTargetDesc/WebAssemblyTargetStreamer.h" 18 #include "TargetInfo/WebAssemblyTargetInfo.h" 19 #include "llvm/MC/MCInstrInfo.h" 20 #include "llvm/MC/MCRegisterInfo.h" 21 #include "llvm/MC/MCSubtargetInfo.h" 22 #include "llvm/MC/TargetRegistry.h" 23 #include "llvm/Support/ErrorHandling.h" 24 using namespace llvm; 25 26 #define DEBUG_TYPE "wasm-mc-target-desc" 27 28 #define GET_INSTRINFO_MC_DESC 29 #define ENABLE_INSTR_PREDICATE_VERIFIER 30 #include "WebAssemblyGenInstrInfo.inc" 31 32 #define GET_SUBTARGETINFO_MC_DESC 33 #include "WebAssemblyGenSubtargetInfo.inc" 34 35 #define GET_REGINFO_MC_DESC 36 #include "WebAssemblyGenRegisterInfo.inc" 37 38 // Exception handling & setjmp-longjmp handling related options. 39 40 // Emscripten's asm.js-style exception handling 41 cl::opt<bool> WebAssembly::WasmEnableEmEH( 42 "enable-emscripten-cxx-exceptions", 43 cl::desc("WebAssembly Emscripten-style exception handling"), 44 cl::init(false)); 45 // Emscripten's asm.js-style setjmp/longjmp handling 46 cl::opt<bool> WebAssembly::WasmEnableEmSjLj( 47 "enable-emscripten-sjlj", 48 cl::desc("WebAssembly Emscripten-style setjmp/longjmp handling"), 49 cl::init(false)); 50 // Exception handling using wasm EH instructions 51 cl::opt<bool> 52 WebAssembly::WasmEnableEH("wasm-enable-eh", 53 cl::desc("WebAssembly exception handling")); 54 // setjmp/longjmp handling using wasm EH instrutions 55 cl::opt<bool> WebAssembly::WasmEnableSjLj( 56 "wasm-enable-sjlj", cl::desc("WebAssembly setjmp/longjmp handling")); 57 58 static MCAsmInfo *createMCAsmInfo(const MCRegisterInfo & /*MRI*/, 59 const Triple &TT, 60 const MCTargetOptions &Options) { 61 return new WebAssemblyMCAsmInfo(TT, Options); 62 } 63 64 static MCInstrInfo *createMCInstrInfo() { 65 auto *X = new MCInstrInfo(); 66 InitWebAssemblyMCInstrInfo(X); 67 return X; 68 } 69 70 static MCRegisterInfo *createMCRegisterInfo(const Triple & /*T*/) { 71 auto *X = new MCRegisterInfo(); 72 InitWebAssemblyMCRegisterInfo(X, 0); 73 return X; 74 } 75 76 static MCInstPrinter *createMCInstPrinter(const Triple & /*T*/, 77 unsigned SyntaxVariant, 78 const MCAsmInfo &MAI, 79 const MCInstrInfo &MII, 80 const MCRegisterInfo &MRI) { 81 assert(SyntaxVariant == 0 && "WebAssembly only has one syntax variant"); 82 return new WebAssemblyInstPrinter(MAI, MII, MRI); 83 } 84 85 static MCCodeEmitter *createCodeEmitter(const MCInstrInfo &MCII, 86 MCContext &Ctx) { 87 return createWebAssemblyMCCodeEmitter(MCII, Ctx); 88 } 89 90 static MCAsmBackend *createAsmBackend(const Target & /*T*/, 91 const MCSubtargetInfo &STI, 92 const MCRegisterInfo & /*MRI*/, 93 const MCTargetOptions & /*Options*/) { 94 return createWebAssemblyAsmBackend(STI.getTargetTriple()); 95 } 96 97 static MCSubtargetInfo *createMCSubtargetInfo(const Triple &TT, StringRef CPU, 98 StringRef FS) { 99 return createWebAssemblyMCSubtargetInfoImpl(TT, CPU, /*TuneCPU*/ CPU, FS); 100 } 101 102 static MCTargetStreamer * 103 createObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) { 104 return new WebAssemblyTargetWasmStreamer(S); 105 } 106 107 static MCTargetStreamer *createAsmTargetStreamer(MCStreamer &S, 108 formatted_raw_ostream &OS, 109 MCInstPrinter * /*InstPrint*/, 110 bool /*isVerboseAsm*/) { 111 return new WebAssemblyTargetAsmStreamer(S, OS); 112 } 113 114 static MCTargetStreamer *createNullTargetStreamer(MCStreamer &S) { 115 return new WebAssemblyTargetNullStreamer(S); 116 } 117 118 // Force static initialization. 119 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeWebAssemblyTargetMC() { 120 for (Target *T : 121 {&getTheWebAssemblyTarget32(), &getTheWebAssemblyTarget64()}) { 122 // Register the MC asm info. 123 RegisterMCAsmInfoFn X(*T, createMCAsmInfo); 124 125 // Register the MC instruction info. 126 TargetRegistry::RegisterMCInstrInfo(*T, createMCInstrInfo); 127 128 // Register the MC register info. 129 TargetRegistry::RegisterMCRegInfo(*T, createMCRegisterInfo); 130 131 // Register the MCInstPrinter. 132 TargetRegistry::RegisterMCInstPrinter(*T, createMCInstPrinter); 133 134 // Register the MC code emitter. 135 TargetRegistry::RegisterMCCodeEmitter(*T, createCodeEmitter); 136 137 // Register the ASM Backend. 138 TargetRegistry::RegisterMCAsmBackend(*T, createAsmBackend); 139 140 // Register the MC subtarget info. 141 TargetRegistry::RegisterMCSubtargetInfo(*T, createMCSubtargetInfo); 142 143 // Register the object target streamer. 144 TargetRegistry::RegisterObjectTargetStreamer(*T, 145 createObjectTargetStreamer); 146 // Register the asm target streamer. 147 TargetRegistry::RegisterAsmTargetStreamer(*T, createAsmTargetStreamer); 148 // Register the null target streamer. 149 TargetRegistry::RegisterNullTargetStreamer(*T, createNullTargetStreamer); 150 } 151 } 152