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 .Case("reference-types", HasReferenceTypes) 49 .Default(false); 50 } 51 52 bool WebAssemblyTargetInfo::isValidCPUName(StringRef Name) const { 53 return llvm::find(ValidCPUNames, Name) != std::end(ValidCPUNames); 54 } 55 56 void WebAssemblyTargetInfo::fillValidCPUList( 57 SmallVectorImpl<StringRef> &Values) const { 58 Values.append(std::begin(ValidCPUNames), std::end(ValidCPUNames)); 59 } 60 61 void WebAssemblyTargetInfo::getTargetDefines(const LangOptions &Opts, 62 MacroBuilder &Builder) const { 63 defineCPUMacros(Builder, "wasm", /*Tuning=*/false); 64 if (SIMDLevel >= SIMD128) 65 Builder.defineMacro("__wasm_simd128__"); 66 if (SIMDLevel >= UnimplementedSIMD128) 67 Builder.defineMacro("__wasm_unimplemented_simd128__"); 68 if (HasNontrappingFPToInt) 69 Builder.defineMacro("__wasm_nontrapping_fptoint__"); 70 if (HasSignExt) 71 Builder.defineMacro("__wasm_sign_ext__"); 72 if (HasExceptionHandling) 73 Builder.defineMacro("__wasm_exception_handling__"); 74 if (HasBulkMemory) 75 Builder.defineMacro("__wasm_bulk_memory__"); 76 if (HasAtomics) 77 Builder.defineMacro("__wasm_atomics__"); 78 if (HasMutableGlobals) 79 Builder.defineMacro("__wasm_mutable_globals__"); 80 if (HasMultivalue) 81 Builder.defineMacro("__wasm_multivalue__"); 82 if (HasTailCall) 83 Builder.defineMacro("__wasm_tail_call__"); 84 if (HasReferenceTypes) 85 Builder.defineMacro("__wasm_reference_types__"); 86 } 87 88 void WebAssemblyTargetInfo::setSIMDLevel(llvm::StringMap<bool> &Features, 89 SIMDEnum Level) { 90 switch (Level) { 91 case UnimplementedSIMD128: 92 Features["unimplemented-simd128"] = true; 93 LLVM_FALLTHROUGH; 94 case SIMD128: 95 Features["simd128"] = true; 96 LLVM_FALLTHROUGH; 97 case NoSIMD: 98 break; 99 } 100 } 101 102 bool WebAssemblyTargetInfo::initFeatureMap( 103 llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags, StringRef CPU, 104 const std::vector<std::string> &FeaturesVec) const { 105 if (CPU == "bleeding-edge") { 106 Features["nontrapping-fptoint"] = true; 107 Features["sign-ext"] = true; 108 Features["atomics"] = true; 109 Features["mutable-globals"] = true; 110 setSIMDLevel(Features, SIMD128); 111 } 112 // Other targets do not consider user-configured features here, but while we 113 // are actively developing new features it is useful to let user-configured 114 // features control availability of builtins 115 setSIMDLevel(Features, SIMDLevel); 116 if (HasNontrappingFPToInt) 117 Features["nontrapping-fptoint"] = true; 118 if (HasSignExt) 119 Features["sign-ext"] = true; 120 if (HasExceptionHandling) 121 Features["exception-handling"] = true; 122 if (HasBulkMemory) 123 Features["bulk-memory"] = true; 124 if (HasAtomics) 125 Features["atomics"] = true; 126 if (HasMutableGlobals) 127 Features["mutable-globals"] = true; 128 if (HasMultivalue) 129 Features["multivalue"] = true; 130 if (HasTailCall) 131 Features["tail-call"] = true; 132 if (HasReferenceTypes) 133 Features["reference-types"] = true; 134 135 return TargetInfo::initFeatureMap(Features, Diags, CPU, FeaturesVec); 136 } 137 138 bool WebAssemblyTargetInfo::handleTargetFeatures( 139 std::vector<std::string> &Features, DiagnosticsEngine &Diags) { 140 for (const auto &Feature : Features) { 141 if (Feature == "+simd128") { 142 SIMDLevel = std::max(SIMDLevel, SIMD128); 143 continue; 144 } 145 if (Feature == "-simd128") { 146 SIMDLevel = std::min(SIMDLevel, SIMDEnum(SIMD128 - 1)); 147 continue; 148 } 149 if (Feature == "+unimplemented-simd128") { 150 SIMDLevel = std::max(SIMDLevel, SIMDEnum(UnimplementedSIMD128)); 151 continue; 152 } 153 if (Feature == "-unimplemented-simd128") { 154 SIMDLevel = std::min(SIMDLevel, SIMDEnum(UnimplementedSIMD128 - 1)); 155 continue; 156 } 157 if (Feature == "+nontrapping-fptoint") { 158 HasNontrappingFPToInt = true; 159 continue; 160 } 161 if (Feature == "-nontrapping-fptoint") { 162 HasNontrappingFPToInt = false; 163 continue; 164 } 165 if (Feature == "+sign-ext") { 166 HasSignExt = true; 167 continue; 168 } 169 if (Feature == "-sign-ext") { 170 HasSignExt = false; 171 continue; 172 } 173 if (Feature == "+exception-handling") { 174 HasExceptionHandling = true; 175 continue; 176 } 177 if (Feature == "-exception-handling") { 178 HasExceptionHandling = false; 179 continue; 180 } 181 if (Feature == "+bulk-memory") { 182 HasBulkMemory = true; 183 continue; 184 } 185 if (Feature == "-bulk-memory") { 186 HasBulkMemory = false; 187 continue; 188 } 189 if (Feature == "+atomics") { 190 HasAtomics = true; 191 continue; 192 } 193 if (Feature == "-atomics") { 194 HasAtomics = false; 195 continue; 196 } 197 if (Feature == "+mutable-globals") { 198 HasMutableGlobals = true; 199 continue; 200 } 201 if (Feature == "-mutable-globals") { 202 HasMutableGlobals = false; 203 continue; 204 } 205 if (Feature == "+multivalue") { 206 HasMultivalue = true; 207 continue; 208 } 209 if (Feature == "-multivalue") { 210 HasMultivalue = false; 211 continue; 212 } 213 if (Feature == "+tail-call") { 214 HasTailCall = true; 215 continue; 216 } 217 if (Feature == "-tail-call") { 218 HasTailCall = false; 219 continue; 220 } 221 if (Feature == "+reference-types") { 222 HasReferenceTypes = true; 223 continue; 224 } 225 if (Feature == "-reference-types") { 226 HasReferenceTypes = false; 227 continue; 228 } 229 230 Diags.Report(diag::err_opt_not_valid_with_opt) 231 << Feature << "-target-feature"; 232 return false; 233 } 234 return true; 235 } 236 237 ArrayRef<Builtin::Info> WebAssemblyTargetInfo::getTargetBuiltins() const { 238 return llvm::makeArrayRef(BuiltinInfo, clang::WebAssembly::LastTSBuiltin - 239 Builtin::FirstTSBuiltin); 240 } 241 242 void WebAssembly32TargetInfo::getTargetDefines(const LangOptions &Opts, 243 MacroBuilder &Builder) const { 244 WebAssemblyTargetInfo::getTargetDefines(Opts, Builder); 245 defineCPUMacros(Builder, "wasm32", /*Tuning=*/false); 246 } 247 248 void WebAssembly64TargetInfo::getTargetDefines(const LangOptions &Opts, 249 MacroBuilder &Builder) const { 250 WebAssemblyTargetInfo::getTargetDefines(Opts, Builder); 251 defineCPUMacros(Builder, "wasm64", /*Tuning=*/false); 252 } 253