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