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 static constexpr Builtin::Info BuiltinInfo[] = { 24 #define BUILTIN(ID, TYPE, ATTRS) \ 25 {#ID, TYPE, ATTRS, nullptr, HeaderDesc::NO_HEADER, ALL_LANGUAGES}, 26 #define TARGET_BUILTIN(ID, TYPE, ATTRS, FEATURE) \ 27 {#ID, TYPE, ATTRS, FEATURE, HeaderDesc::NO_HEADER, ALL_LANGUAGES}, 28 #define LIBBUILTIN(ID, TYPE, ATTRS, HEADER) \ 29 {#ID, TYPE, ATTRS, nullptr, HeaderDesc::HEADER, ALL_LANGUAGES}, 30 #include "clang/Basic/BuiltinsWebAssembly.def" 31 }; 32 33 static constexpr llvm::StringLiteral ValidCPUNames[] = { 34 {"mvp"}, {"bleeding-edge"}, {"generic"}}; 35 36 StringRef WebAssemblyTargetInfo::getABI() const { return ABI; } 37 38 bool WebAssemblyTargetInfo::setABI(const std::string &Name) { 39 if (Name != "mvp" && Name != "experimental-mv") 40 return false; 41 42 ABI = Name; 43 return true; 44 } 45 46 bool WebAssemblyTargetInfo::hasFeature(StringRef Feature) const { 47 return llvm::StringSwitch<bool>(Feature) 48 .Case("atomics", HasAtomics) 49 .Case("bulk-memory", HasBulkMemory) 50 .Case("exception-handling", HasExceptionHandling) 51 .Case("extended-const", HasExtendedConst) 52 .Case("half-precision", HasHalfPrecision) 53 .Case("multimemory", HasMultiMemory) 54 .Case("multivalue", HasMultivalue) 55 .Case("mutable-globals", HasMutableGlobals) 56 .Case("nontrapping-fptoint", HasNontrappingFPToInt) 57 .Case("reference-types", HasReferenceTypes) 58 .Case("relaxed-simd", SIMDLevel >= RelaxedSIMD) 59 .Case("sign-ext", HasSignExt) 60 .Case("simd128", SIMDLevel >= SIMD128) 61 .Case("tail-call", HasTailCall) 62 .Default(false); 63 } 64 65 bool WebAssemblyTargetInfo::isValidCPUName(StringRef Name) const { 66 return llvm::is_contained(ValidCPUNames, Name); 67 } 68 69 void WebAssemblyTargetInfo::fillValidCPUList( 70 SmallVectorImpl<StringRef> &Values) const { 71 Values.append(std::begin(ValidCPUNames), std::end(ValidCPUNames)); 72 } 73 74 void WebAssemblyTargetInfo::getTargetDefines(const LangOptions &Opts, 75 MacroBuilder &Builder) const { 76 defineCPUMacros(Builder, "wasm", /*Tuning=*/false); 77 if (HasAtomics) 78 Builder.defineMacro("__wasm_atomics__"); 79 if (HasBulkMemory) 80 Builder.defineMacro("__wasm_bulk_memory__"); 81 if (HasExceptionHandling) 82 Builder.defineMacro("__wasm_exception_handling__"); 83 if (HasExtendedConst) 84 Builder.defineMacro("__wasm_extended_const__"); 85 if (HasMultiMemory) 86 Builder.defineMacro("__wasm_multimemory__"); 87 if (HasHalfPrecision) 88 Builder.defineMacro("__wasm_half_precision__"); 89 if (HasMultivalue) 90 Builder.defineMacro("__wasm_multivalue__"); 91 if (HasMutableGlobals) 92 Builder.defineMacro("__wasm_mutable_globals__"); 93 if (HasNontrappingFPToInt) 94 Builder.defineMacro("__wasm_nontrapping_fptoint__"); 95 if (HasReferenceTypes) 96 Builder.defineMacro("__wasm_reference_types__"); 97 if (SIMDLevel >= RelaxedSIMD) 98 Builder.defineMacro("__wasm_relaxed_simd__"); 99 if (HasSignExt) 100 Builder.defineMacro("__wasm_sign_ext__"); 101 if (SIMDLevel >= SIMD128) 102 Builder.defineMacro("__wasm_simd128__"); 103 if (HasTailCall) 104 Builder.defineMacro("__wasm_tail_call__"); 105 106 Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1"); 107 Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2"); 108 Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4"); 109 Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8"); 110 } 111 112 void WebAssemblyTargetInfo::setSIMDLevel(llvm::StringMap<bool> &Features, 113 SIMDEnum Level, bool Enabled) { 114 if (Enabled) { 115 switch (Level) { 116 case RelaxedSIMD: 117 Features["relaxed-simd"] = true; 118 [[fallthrough]]; 119 case SIMD128: 120 Features["simd128"] = true; 121 [[fallthrough]]; 122 case NoSIMD: 123 break; 124 } 125 return; 126 } 127 128 switch (Level) { 129 case NoSIMD: 130 case SIMD128: 131 Features["simd128"] = false; 132 [[fallthrough]]; 133 case RelaxedSIMD: 134 Features["relaxed-simd"] = false; 135 break; 136 } 137 } 138 139 void WebAssemblyTargetInfo::setFeatureEnabled(llvm::StringMap<bool> &Features, 140 StringRef Name, 141 bool Enabled) const { 142 if (Name == "simd128") 143 setSIMDLevel(Features, SIMD128, Enabled); 144 else if (Name == "relaxed-simd") 145 setSIMDLevel(Features, RelaxedSIMD, Enabled); 146 else 147 Features[Name] = Enabled; 148 } 149 150 bool WebAssemblyTargetInfo::initFeatureMap( 151 llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags, StringRef CPU, 152 const std::vector<std::string> &FeaturesVec) const { 153 auto addGenericFeatures = [&]() { 154 Features["multivalue"] = true; 155 Features["mutable-globals"] = true; 156 Features["reference-types"] = true; 157 Features["sign-ext"] = true; 158 }; 159 auto addBleedingEdgeFeatures = [&]() { 160 addGenericFeatures(); 161 Features["atomics"] = true; 162 Features["bulk-memory"] = true; 163 Features["exception-handling"] = true; 164 Features["extended-const"] = true; 165 Features["half-precision"] = true; 166 Features["multimemory"] = true; 167 Features["nontrapping-fptoint"] = true; 168 Features["tail-call"] = true; 169 setSIMDLevel(Features, RelaxedSIMD, true); 170 }; 171 if (CPU == "generic") { 172 addGenericFeatures(); 173 } else if (CPU == "bleeding-edge") { 174 addBleedingEdgeFeatures(); 175 } 176 177 return TargetInfo::initFeatureMap(Features, Diags, CPU, FeaturesVec); 178 } 179 180 bool WebAssemblyTargetInfo::handleTargetFeatures( 181 std::vector<std::string> &Features, DiagnosticsEngine &Diags) { 182 for (const auto &Feature : Features) { 183 if (Feature == "+atomics") { 184 HasAtomics = true; 185 continue; 186 } 187 if (Feature == "-atomics") { 188 HasAtomics = false; 189 continue; 190 } 191 if (Feature == "+bulk-memory") { 192 HasBulkMemory = true; 193 continue; 194 } 195 if (Feature == "-bulk-memory") { 196 HasBulkMemory = false; 197 continue; 198 } 199 if (Feature == "+exception-handling") { 200 HasExceptionHandling = true; 201 continue; 202 } 203 if (Feature == "-exception-handling") { 204 HasExceptionHandling = false; 205 continue; 206 } 207 if (Feature == "+extended-const") { 208 HasExtendedConst = true; 209 continue; 210 } 211 if (Feature == "-extended-const") { 212 HasExtendedConst = false; 213 continue; 214 } 215 if (Feature == "+half-precision") { 216 SIMDLevel = std::max(SIMDLevel, SIMD128); 217 HasHalfPrecision = true; 218 continue; 219 } 220 if (Feature == "-half-precision") { 221 HasHalfPrecision = false; 222 continue; 223 } 224 if (Feature == "+multimemory") { 225 HasMultiMemory = true; 226 continue; 227 } 228 if (Feature == "-multimemory") { 229 HasMultiMemory = false; 230 continue; 231 } 232 if (Feature == "+multivalue") { 233 HasMultivalue = true; 234 continue; 235 } 236 if (Feature == "-multivalue") { 237 HasMultivalue = false; 238 continue; 239 } 240 if (Feature == "+mutable-globals") { 241 HasMutableGlobals = true; 242 continue; 243 } 244 if (Feature == "-mutable-globals") { 245 HasMutableGlobals = false; 246 continue; 247 } 248 if (Feature == "+nontrapping-fptoint") { 249 HasNontrappingFPToInt = true; 250 continue; 251 } 252 if (Feature == "-nontrapping-fptoint") { 253 HasNontrappingFPToInt = false; 254 continue; 255 } 256 if (Feature == "+reference-types") { 257 HasReferenceTypes = true; 258 continue; 259 } 260 if (Feature == "-reference-types") { 261 HasReferenceTypes = false; 262 continue; 263 } 264 if (Feature == "+relaxed-simd") { 265 SIMDLevel = std::max(SIMDLevel, RelaxedSIMD); 266 continue; 267 } 268 if (Feature == "-relaxed-simd") { 269 SIMDLevel = std::min(SIMDLevel, SIMDEnum(RelaxedSIMD - 1)); 270 continue; 271 } 272 if (Feature == "+sign-ext") { 273 HasSignExt = true; 274 continue; 275 } 276 if (Feature == "-sign-ext") { 277 HasSignExt = false; 278 continue; 279 } 280 if (Feature == "+simd128") { 281 SIMDLevel = std::max(SIMDLevel, SIMD128); 282 continue; 283 } 284 if (Feature == "-simd128") { 285 SIMDLevel = std::min(SIMDLevel, SIMDEnum(SIMD128 - 1)); 286 continue; 287 } 288 if (Feature == "+tail-call") { 289 HasTailCall = true; 290 continue; 291 } 292 if (Feature == "-tail-call") { 293 HasTailCall = false; 294 continue; 295 } 296 297 Diags.Report(diag::err_opt_not_valid_with_opt) 298 << Feature << "-target-feature"; 299 return false; 300 } 301 return true; 302 } 303 304 ArrayRef<Builtin::Info> WebAssemblyTargetInfo::getTargetBuiltins() const { 305 return llvm::ArrayRef(BuiltinInfo, clang::WebAssembly::LastTSBuiltin - 306 Builtin::FirstTSBuiltin); 307 } 308 309 void WebAssemblyTargetInfo::adjust(DiagnosticsEngine &Diags, 310 LangOptions &Opts) { 311 TargetInfo::adjust(Diags, Opts); 312 // Turn off POSIXThreads and ThreadModel so that we don't predefine _REENTRANT 313 // or __STDCPP_THREADS__ if we will eventually end up stripping atomics 314 // because they are unsupported. 315 if (!HasAtomics || !HasBulkMemory) { 316 Opts.POSIXThreads = false; 317 Opts.setThreadModel(LangOptions::ThreadModelKind::Single); 318 Opts.ThreadsafeStatics = false; 319 } 320 } 321 322 void WebAssembly32TargetInfo::getTargetDefines(const LangOptions &Opts, 323 MacroBuilder &Builder) const { 324 WebAssemblyTargetInfo::getTargetDefines(Opts, Builder); 325 defineCPUMacros(Builder, "wasm32", /*Tuning=*/false); 326 } 327 328 void WebAssembly64TargetInfo::getTargetDefines(const LangOptions &Opts, 329 MacroBuilder &Builder) const { 330 WebAssemblyTargetInfo::getTargetDefines(Opts, Builder); 331 defineCPUMacros(Builder, "wasm64", /*Tuning=*/false); 332 } 333