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 0, // hlsl_constant 46 20, // wasm_funcref 47 }; 48 49 class LLVM_LIBRARY_VISIBILITY WebAssemblyTargetInfo : public TargetInfo { 50 51 enum SIMDEnum { 52 NoSIMD, 53 SIMD128, 54 RelaxedSIMD, 55 } SIMDLevel = NoSIMD; 56 57 bool HasAtomics = false; 58 bool HasBulkMemory = false; 59 bool HasBulkMemoryOpt = false; 60 bool HasCallIndirectOverlong = false; 61 bool HasExceptionHandling = false; 62 bool HasExtendedConst = false; 63 bool HasFP16 = false; 64 bool HasMultiMemory = false; 65 bool HasMultivalue = false; 66 bool HasMutableGlobals = false; 67 bool HasNontrappingFPToInt = false; 68 bool HasReferenceTypes = false; 69 bool HasSignExt = false; 70 bool HasTailCall = false; 71 bool HasWideArithmetic = false; 72 73 std::string ABI; 74 75 public: 76 explicit WebAssemblyTargetInfo(const llvm::Triple &T, const TargetOptions &) 77 : TargetInfo(T) { 78 AddrSpaceMap = &WebAssemblyAddrSpaceMap; 79 NoAsmVariants = true; 80 SuitableAlign = 128; 81 LargeArrayMinWidth = 128; 82 LargeArrayAlign = 128; 83 SigAtomicType = SignedLong; 84 LongDoubleWidth = LongDoubleAlign = 128; 85 LongDoubleFormat = &llvm::APFloat::IEEEquad(); 86 MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 64; 87 // size_t being unsigned long for both wasm32 and wasm64 makes mangled names 88 // more consistent between the two. 89 SizeType = UnsignedLong; 90 PtrDiffType = SignedLong; 91 IntPtrType = SignedLong; 92 HasUnalignedAccess = true; 93 } 94 95 StringRef getABI() const override; 96 bool setABI(const std::string &Name) override; 97 bool useFP16ConversionIntrinsics() const override { return !HasFP16; } 98 99 protected: 100 void getTargetDefines(const LangOptions &Opts, 101 MacroBuilder &Builder) const override; 102 103 private: 104 static void setSIMDLevel(llvm::StringMap<bool> &Features, SIMDEnum Level, 105 bool Enabled); 106 107 bool 108 initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags, 109 StringRef CPU, 110 const std::vector<std::string> &FeaturesVec) const override; 111 bool hasFeature(StringRef Feature) const final; 112 113 void setFeatureEnabled(llvm::StringMap<bool> &Features, StringRef Name, 114 bool Enabled) const final; 115 116 bool handleTargetFeatures(std::vector<std::string> &Features, 117 DiagnosticsEngine &Diags) final; 118 119 bool isValidCPUName(StringRef Name) const final; 120 void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const final; 121 122 bool setCPU(const std::string &Name) final { return isValidCPUName(Name); } 123 124 ArrayRef<Builtin::Info> getTargetBuiltins() const final; 125 126 BuiltinVaListKind getBuiltinVaListKind() const final { 127 return VoidPtrBuiltinVaList; 128 } 129 130 ArrayRef<const char *> getGCCRegNames() const final { return {}; } 131 132 ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const final { 133 return {}; 134 } 135 136 bool validateAsmConstraint(const char *&Name, 137 TargetInfo::ConstraintInfo &Info) const final { 138 return false; 139 } 140 141 std::string_view getClobbers() const final { return ""; } 142 143 bool isCLZForZeroUndef() const final { return false; } 144 145 bool hasInt128Type() const final { return true; } 146 147 IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final { 148 // WebAssembly prefers long long for explicitly 64-bit integers. 149 return BitWidth == 64 ? (IsSigned ? SignedLongLong : UnsignedLongLong) 150 : TargetInfo::getIntTypeByWidth(BitWidth, IsSigned); 151 } 152 153 IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final { 154 // WebAssembly uses long long for int_least64_t and int_fast64_t. 155 return BitWidth == 64 156 ? (IsSigned ? SignedLongLong : UnsignedLongLong) 157 : TargetInfo::getLeastIntTypeByWidth(BitWidth, IsSigned); 158 } 159 160 CallingConvCheckResult checkCallingConvention(CallingConv CC) const override { 161 switch (CC) { 162 case CC_C: 163 case CC_Swift: 164 return CCCR_OK; 165 case CC_SwiftAsync: 166 return CCCR_Error; 167 default: 168 return CCCR_Warning; 169 } 170 } 171 172 bool hasBitIntType() const override { return true; } 173 174 bool hasProtectedVisibility() const override { return false; } 175 176 void adjust(DiagnosticsEngine &Diags, LangOptions &Opts) override; 177 }; 178 179 class LLVM_LIBRARY_VISIBILITY WebAssembly32TargetInfo 180 : public WebAssemblyTargetInfo { 181 public: 182 explicit WebAssembly32TargetInfo(const llvm::Triple &T, 183 const TargetOptions &Opts) 184 : WebAssemblyTargetInfo(T, Opts) { 185 if (T.isOSEmscripten()) 186 resetDataLayout( 187 "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-f128:64-n32:64-" 188 "S128-ni:1:10:20"); 189 else 190 resetDataLayout("e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-" 191 "S128-ni:1:10:20"); 192 } 193 194 protected: 195 void getTargetDefines(const LangOptions &Opts, 196 MacroBuilder &Builder) const override; 197 }; 198 199 class LLVM_LIBRARY_VISIBILITY WebAssembly64TargetInfo 200 : public WebAssemblyTargetInfo { 201 public: 202 explicit WebAssembly64TargetInfo(const llvm::Triple &T, 203 const TargetOptions &Opts) 204 : WebAssemblyTargetInfo(T, Opts) { 205 LongAlign = LongWidth = 64; 206 PointerAlign = PointerWidth = 64; 207 SizeType = UnsignedLong; 208 PtrDiffType = SignedLong; 209 IntPtrType = SignedLong; 210 if (T.isOSEmscripten()) 211 resetDataLayout( 212 "e-m:e-p:64:64-p10:8:8-p20:8:8-i64:64-i128:128-f128:64-n32:64-" 213 "S128-ni:1:10:20"); 214 else 215 resetDataLayout("e-m:e-p:64:64-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-" 216 "S128-ni:1:10:20"); 217 } 218 219 protected: 220 void getTargetDefines(const LangOptions &Opts, 221 MacroBuilder &Builder) const override; 222 }; 223 } // namespace targets 224 } // namespace clang 225 #endif // LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H 226