1 //=== WebAssembly.h - Declare WebAssembly target feature support *- C++ -*-===// 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 declares WebAssembly TargetInfo objects. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H 14 #define LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H 15 16 #include "clang/Basic/TargetInfo.h" 17 #include "clang/Basic/TargetOptions.h" 18 #include "llvm/Support/Compiler.h" 19 #include "llvm/TargetParser/Triple.h" 20 21 namespace clang { 22 namespace targets { 23 24 static const unsigned WebAssemblyAddrSpaceMap[] = { 25 0, // Default 26 0, // opencl_global 27 0, // opencl_local 28 0, // opencl_constant 29 0, // opencl_private 30 0, // opencl_generic 31 0, // opencl_global_device 32 0, // opencl_global_host 33 0, // cuda_device 34 0, // cuda_constant 35 0, // cuda_shared 36 0, // sycl_global 37 0, // sycl_global_device 38 0, // sycl_global_host 39 0, // sycl_local 40 0, // sycl_private 41 0, // ptr32_sptr 42 0, // ptr32_uptr 43 0, // ptr64 44 0, // hlsl_groupshared 45 20, // wasm_funcref 46 }; 47 48 class LLVM_LIBRARY_VISIBILITY WebAssemblyTargetInfo : public TargetInfo { 49 50 enum SIMDEnum { 51 NoSIMD, 52 SIMD128, 53 RelaxedSIMD, 54 } SIMDLevel = NoSIMD; 55 56 bool HasNontrappingFPToInt = false; 57 bool HasSignExt = false; 58 bool HasExceptionHandling = false; 59 bool HasBulkMemory = false; 60 bool HasAtomics = false; 61 bool HasMutableGlobals = false; 62 bool HasMultivalue = false; 63 bool HasTailCall = false; 64 bool HasReferenceTypes = false; 65 bool HasExtendedConst = false; 66 67 std::string ABI; 68 69 public: 70 explicit WebAssemblyTargetInfo(const llvm::Triple &T, const TargetOptions &) 71 : TargetInfo(T) { 72 AddrSpaceMap = &WebAssemblyAddrSpaceMap; 73 NoAsmVariants = true; 74 SuitableAlign = 128; 75 LargeArrayMinWidth = 128; 76 LargeArrayAlign = 128; 77 SigAtomicType = SignedLong; 78 LongDoubleWidth = LongDoubleAlign = 128; 79 LongDoubleFormat = &llvm::APFloat::IEEEquad(); 80 MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 64; 81 // size_t being unsigned long for both wasm32 and wasm64 makes mangled names 82 // more consistent between the two. 83 SizeType = UnsignedLong; 84 PtrDiffType = SignedLong; 85 IntPtrType = SignedLong; 86 } 87 88 StringRef getABI() const override; 89 bool setABI(const std::string &Name) override; 90 91 protected: 92 void getTargetDefines(const LangOptions &Opts, 93 MacroBuilder &Builder) const override; 94 95 private: 96 static void setSIMDLevel(llvm::StringMap<bool> &Features, SIMDEnum Level, 97 bool Enabled); 98 99 bool 100 initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags, 101 StringRef CPU, 102 const std::vector<std::string> &FeaturesVec) const override; 103 bool hasFeature(StringRef Feature) const final; 104 105 void setFeatureEnabled(llvm::StringMap<bool> &Features, StringRef Name, 106 bool Enabled) const final; 107 108 bool handleTargetFeatures(std::vector<std::string> &Features, 109 DiagnosticsEngine &Diags) final; 110 111 bool isValidCPUName(StringRef Name) const final; 112 void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const final; 113 114 bool setCPU(const std::string &Name) final { return isValidCPUName(Name); } 115 116 ArrayRef<Builtin::Info> getTargetBuiltins() const final; 117 118 BuiltinVaListKind getBuiltinVaListKind() const final { 119 return VoidPtrBuiltinVaList; 120 } 121 122 ArrayRef<const char *> getGCCRegNames() const final { return std::nullopt; } 123 124 ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const final { 125 return std::nullopt; 126 } 127 128 bool validateAsmConstraint(const char *&Name, 129 TargetInfo::ConstraintInfo &Info) const final { 130 return false; 131 } 132 133 std::string_view getClobbers() const final { return ""; } 134 135 bool isCLZForZeroUndef() const final { return false; } 136 137 bool hasInt128Type() const final { return true; } 138 139 IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final { 140 // WebAssembly prefers long long for explicitly 64-bit integers. 141 return BitWidth == 64 ? (IsSigned ? SignedLongLong : UnsignedLongLong) 142 : TargetInfo::getIntTypeByWidth(BitWidth, IsSigned); 143 } 144 145 IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final { 146 // WebAssembly uses long long for int_least64_t and int_fast64_t. 147 return BitWidth == 64 148 ? (IsSigned ? SignedLongLong : UnsignedLongLong) 149 : TargetInfo::getLeastIntTypeByWidth(BitWidth, IsSigned); 150 } 151 152 CallingConvCheckResult checkCallingConvention(CallingConv CC) const override { 153 switch (CC) { 154 case CC_C: 155 case CC_Swift: 156 return CCCR_OK; 157 case CC_SwiftAsync: 158 return CCCR_Error; 159 default: 160 return CCCR_Warning; 161 } 162 } 163 164 bool hasBitIntType() const override { return true; } 165 166 bool hasProtectedVisibility() const override { return false; } 167 168 void adjust(DiagnosticsEngine &Diags, LangOptions &Opts) override; 169 }; 170 171 class LLVM_LIBRARY_VISIBILITY WebAssembly32TargetInfo 172 : public WebAssemblyTargetInfo { 173 public: 174 explicit WebAssembly32TargetInfo(const llvm::Triple &T, 175 const TargetOptions &Opts) 176 : WebAssemblyTargetInfo(T, Opts) { 177 if (T.isOSEmscripten()) 178 resetDataLayout("e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-f128:64-n32:64-" 179 "S128-ni:1:10:20"); 180 else 181 resetDataLayout( 182 "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"); 183 } 184 185 protected: 186 void getTargetDefines(const LangOptions &Opts, 187 MacroBuilder &Builder) const override; 188 }; 189 190 class LLVM_LIBRARY_VISIBILITY WebAssembly64TargetInfo 191 : public WebAssemblyTargetInfo { 192 public: 193 explicit WebAssembly64TargetInfo(const llvm::Triple &T, 194 const TargetOptions &Opts) 195 : WebAssemblyTargetInfo(T, Opts) { 196 LongAlign = LongWidth = 64; 197 PointerAlign = PointerWidth = 64; 198 SizeType = UnsignedLong; 199 PtrDiffType = SignedLong; 200 IntPtrType = SignedLong; 201 if (T.isOSEmscripten()) 202 resetDataLayout("e-m:e-p:64:64-p10:8:8-p20:8:8-i64:64-f128:64-n32:64-" 203 "S128-ni:1:10:20"); 204 else 205 resetDataLayout( 206 "e-m:e-p:64:64-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"); 207 } 208 209 protected: 210 void getTargetDefines(const LangOptions &Opts, 211 MacroBuilder &Builder) const override; 212 }; 213 } // namespace targets 214 } // namespace clang 215 #endif // LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H 216