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