1 //===--- WebAssembly.cpp - Implement WebAssembly target feature support ---===// 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 // This file implements WebAssembly TargetInfo objects. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "WebAssembly.h" 14 #include "Targets.h" 15 #include "clang/Basic/Builtins.h" 16 #include "clang/Basic/Diagnostic.h" 17 #include "clang/Basic/TargetBuiltins.h" 18 #include "llvm/ADT/StringSwitch.h" 19 20 using namespace clang; 21 using namespace clang::targets; 22 23 const Builtin::Info WebAssemblyTargetInfo::BuiltinInfo[] = { 24 #define BUILTIN(ID, TYPE, ATTRS) \ 25 {#ID, TYPE, ATTRS, nullptr, ALL_LANGUAGES, nullptr}, 26 #define TARGET_BUILTIN(ID, TYPE, ATTRS, FEATURE) \ 27 {#ID, TYPE, ATTRS, nullptr, ALL_LANGUAGES, FEATURE}, 28 #define LIBBUILTIN(ID, TYPE, ATTRS, HEADER) \ 29 {#ID, TYPE, ATTRS, HEADER, ALL_LANGUAGES, nullptr}, 30 #include "clang/Basic/BuiltinsWebAssembly.def" 31 }; 32 33 static constexpr llvm::StringLiteral ValidCPUNames[] = { 34 {"mvp"}, {"bleeding-edge"}, {"generic"}}; 35 36 bool WebAssemblyTargetInfo::hasFeature(StringRef Feature) const { 37 return llvm::StringSwitch<bool>(Feature) 38 .Case("simd128", SIMDLevel >= SIMD128) 39 .Case("unimplemented-simd128", SIMDLevel >= UnimplementedSIMD128) 40 .Case("nontrapping-fptoint", HasNontrappingFPToInt) 41 .Case("sign-ext", HasSignExt) 42 .Case("exception-handling", HasExceptionHandling) 43 .Case("bulk-memory", HasBulkMemory) 44 .Case("atomics", HasAtomics) 45 .Case("mutable-globals", HasMutableGlobals) 46 .Case("multivalue", HasMultivalue) 47 .Case("tail-call", HasTailCall) 48 .Default(false); 49 } 50 51 bool WebAssemblyTargetInfo::isValidCPUName(StringRef Name) const { 52 return llvm::find(ValidCPUNames, Name) != std::end(ValidCPUNames); 53 } 54 55 void WebAssemblyTargetInfo::fillValidCPUList( 56 SmallVectorImpl<StringRef> &Values) const { 57 Values.append(std::begin(ValidCPUNames), std::end(ValidCPUNames)); 58 } 59 60 void WebAssemblyTargetInfo::getTargetDefines(const LangOptions &Opts, 61 MacroBuilder &Builder) const { 62 defineCPUMacros(Builder, "wasm", /*Tuning=*/false); 63 if (SIMDLevel >= SIMD128) 64 Builder.defineMacro("__wasm_simd128__"); 65 if (SIMDLevel >= UnimplementedSIMD128) 66 Builder.defineMacro("__wasm_unimplemented_simd128__"); 67 if (HasNontrappingFPToInt) 68 Builder.defineMacro("__wasm_nontrapping_fptoint__"); 69 if (HasSignExt) 70 Builder.defineMacro("__wasm_sign_ext__"); 71 if (HasExceptionHandling) 72 Builder.defineMacro("__wasm_exception_handling__"); 73 if (HasBulkMemory) 74 Builder.defineMacro("__wasm_bulk_memory__"); 75 if (HasAtomics) 76 Builder.defineMacro("__wasm_atomics__"); 77 if (HasMutableGlobals) 78 Builder.defineMacro("__wasm_mutable_globals__"); 79 if (HasMultivalue) 80 Builder.defineMacro("__wasm_multivalue__"); 81 if (HasTailCall) 82 Builder.defineMacro("__wasm_tail_call__"); 83 } 84 85 void WebAssemblyTargetInfo::setSIMDLevel(llvm::StringMap<bool> &Features, 86 SIMDEnum Level) { 87 switch (Level) { 88 case UnimplementedSIMD128: 89 Features["unimplemented-simd128"] = true; 90 LLVM_FALLTHROUGH; 91 case SIMD128: 92 Features["simd128"] = true; 93 LLVM_FALLTHROUGH; 94 case NoSIMD: 95 break; 96 } 97 } 98 99 bool WebAssemblyTargetInfo::initFeatureMap( 100 llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags, StringRef CPU, 101 const std::vector<std::string> &FeaturesVec) const { 102 if (CPU == "bleeding-edge") { 103 Features["nontrapping-fptoint"] = true; 104 Features["sign-ext"] = true; 105 Features["atomics"] = true; 106 Features["mutable-globals"] = true; 107 setSIMDLevel(Features, SIMD128); 108 } 109 // Other targets do not consider user-configured features here, but while we 110 // are actively developing new features it is useful to let user-configured 111 // features control availability of builtins 112 setSIMDLevel(Features, SIMDLevel); 113 if (HasNontrappingFPToInt) 114 Features["nontrapping-fptoint"] = true; 115 if (HasSignExt) 116 Features["sign-ext"] = true; 117 if (HasExceptionHandling) 118 Features["exception-handling"] = true; 119 if (HasBulkMemory) 120 Features["bulk-memory"] = true; 121 if (HasAtomics) 122 Features["atomics"] = true; 123 if (HasMutableGlobals) 124 Features["mutable-globals"] = true; 125 if (HasMultivalue) 126 Features["multivalue"] = true; 127 if (HasTailCall) 128 Features["tail-call"] = true; 129 130 return TargetInfo::initFeatureMap(Features, Diags, CPU, FeaturesVec); 131 } 132 133 bool WebAssemblyTargetInfo::handleTargetFeatures( 134 std::vector<std::string> &Features, DiagnosticsEngine &Diags) { 135 for (const auto &Feature : Features) { 136 if (Feature == "+simd128") { 137 SIMDLevel = std::max(SIMDLevel, SIMD128); 138 continue; 139 } 140 if (Feature == "-simd128") { 141 SIMDLevel = std::min(SIMDLevel, SIMDEnum(SIMD128 - 1)); 142 continue; 143 } 144 if (Feature == "+unimplemented-simd128") { 145 SIMDLevel = std::max(SIMDLevel, SIMDEnum(UnimplementedSIMD128)); 146 continue; 147 } 148 if (Feature == "-unimplemented-simd128") { 149 SIMDLevel = std::min(SIMDLevel, SIMDEnum(UnimplementedSIMD128 - 1)); 150 continue; 151 } 152 if (Feature == "+nontrapping-fptoint") { 153 HasNontrappingFPToInt = true; 154 continue; 155 } 156 if (Feature == "-nontrapping-fptoint") { 157 HasNontrappingFPToInt = false; 158 continue; 159 } 160 if (Feature == "+sign-ext") { 161 HasSignExt = true; 162 continue; 163 } 164 if (Feature == "-sign-ext") { 165 HasSignExt = false; 166 continue; 167 } 168 if (Feature == "+exception-handling") { 169 HasExceptionHandling = true; 170 continue; 171 } 172 if (Feature == "-exception-handling") { 173 HasExceptionHandling = false; 174 continue; 175 } 176 if (Feature == "+bulk-memory") { 177 HasBulkMemory = true; 178 continue; 179 } 180 if (Feature == "-bulk-memory") { 181 HasBulkMemory = false; 182 continue; 183 } 184 if (Feature == "+atomics") { 185 HasAtomics = true; 186 continue; 187 } 188 if (Feature == "-atomics") { 189 HasAtomics = false; 190 continue; 191 } 192 if (Feature == "+mutable-globals") { 193 HasMutableGlobals = true; 194 continue; 195 } 196 if (Feature == "-mutable-globals") { 197 HasMutableGlobals = false; 198 continue; 199 } 200 if (Feature == "+multivalue") { 201 HasMultivalue = true; 202 continue; 203 } 204 if (Feature == "-multivalue") { 205 HasMultivalue = false; 206 continue; 207 } 208 if (Feature == "+tail-call") { 209 HasTailCall = true; 210 continue; 211 } 212 if (Feature == "-tail-call") { 213 HasTailCall = false; 214 continue; 215 } 216 217 Diags.Report(diag::err_opt_not_valid_with_opt) 218 << Feature << "-target-feature"; 219 return false; 220 } 221 return true; 222 } 223 224 ArrayRef<Builtin::Info> WebAssemblyTargetInfo::getTargetBuiltins() const { 225 return llvm::makeArrayRef(BuiltinInfo, clang::WebAssembly::LastTSBuiltin - 226 Builtin::FirstTSBuiltin); 227 } 228 229 void WebAssembly32TargetInfo::getTargetDefines(const LangOptions &Opts, 230 MacroBuilder &Builder) const { 231 WebAssemblyTargetInfo::getTargetDefines(Opts, Builder); 232 defineCPUMacros(Builder, "wasm32", /*Tuning=*/false); 233 } 234 235 void WebAssembly64TargetInfo::getTargetDefines(const LangOptions &Opts, 236 MacroBuilder &Builder) const { 237 WebAssemblyTargetInfo::getTargetDefines(Opts, Builder); 238 defineCPUMacros(Builder, "wasm64", /*Tuning=*/false); 239 } 240