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 static const Builtin::Info BuiltinInfo[]; 26 27 enum SIMDEnum { 28 NoSIMD, 29 SIMD128, 30 RelaxedSIMD, 31 } SIMDLevel = NoSIMD; 32 33 bool HasNontrappingFPToInt = false; 34 bool HasSignExt = false; 35 bool HasExceptionHandling = false; 36 bool HasBulkMemory = false; 37 bool HasAtomics = false; 38 bool HasMutableGlobals = false; 39 bool HasMultivalue = false; 40 bool HasTailCall = false; 41 bool HasReferenceTypes = false; 42 bool HasExtendedConst = false; 43 44 std::string ABI; 45 46 public: 47 explicit WebAssemblyTargetInfo(const llvm::Triple &T, const TargetOptions &) 48 : TargetInfo(T) { 49 NoAsmVariants = true; 50 SuitableAlign = 128; 51 LargeArrayMinWidth = 128; 52 LargeArrayAlign = 128; 53 SimdDefaultAlign = 128; 54 SigAtomicType = SignedLong; 55 LongDoubleWidth = LongDoubleAlign = 128; 56 LongDoubleFormat = &llvm::APFloat::IEEEquad(); 57 MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 64; 58 // size_t being unsigned long for both wasm32 and wasm64 makes mangled names 59 // more consistent between the two. 60 SizeType = UnsignedLong; 61 PtrDiffType = SignedLong; 62 IntPtrType = SignedLong; 63 } 64 65 StringRef getABI() const override; 66 bool setABI(const std::string &Name) override; 67 68 protected: 69 void getTargetDefines(const LangOptions &Opts, 70 MacroBuilder &Builder) const override; 71 72 private: 73 static void setSIMDLevel(llvm::StringMap<bool> &Features, SIMDEnum Level, 74 bool Enabled); 75 76 bool 77 initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags, 78 StringRef CPU, 79 const std::vector<std::string> &FeaturesVec) const override; 80 bool hasFeature(StringRef Feature) const final; 81 82 void setFeatureEnabled(llvm::StringMap<bool> &Features, StringRef Name, 83 bool Enabled) const final; 84 85 bool handleTargetFeatures(std::vector<std::string> &Features, 86 DiagnosticsEngine &Diags) final; 87 88 bool isValidCPUName(StringRef Name) const final; 89 void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const final; 90 91 bool setCPU(const std::string &Name) final { return isValidCPUName(Name); } 92 93 ArrayRef<Builtin::Info> getTargetBuiltins() const final; 94 95 BuiltinVaListKind getBuiltinVaListKind() const final { 96 return VoidPtrBuiltinVaList; 97 } 98 99 ArrayRef<const char *> getGCCRegNames() const final { return None; } 100 101 ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const final { 102 return None; 103 } 104 105 bool validateAsmConstraint(const char *&Name, 106 TargetInfo::ConstraintInfo &Info) const final { 107 return false; 108 } 109 110 const char *getClobbers() const final { return ""; } 111 112 bool isCLZForZeroUndef() const final { return false; } 113 114 bool hasInt128Type() const final { return true; } 115 116 IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final { 117 // WebAssembly prefers long long for explicitly 64-bit integers. 118 return BitWidth == 64 ? (IsSigned ? SignedLongLong : UnsignedLongLong) 119 : TargetInfo::getIntTypeByWidth(BitWidth, IsSigned); 120 } 121 122 IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final { 123 // WebAssembly uses long long for int_least64_t and int_fast64_t. 124 return BitWidth == 64 125 ? (IsSigned ? SignedLongLong : UnsignedLongLong) 126 : TargetInfo::getLeastIntTypeByWidth(BitWidth, IsSigned); 127 } 128 129 CallingConvCheckResult checkCallingConvention(CallingConv CC) const override { 130 switch (CC) { 131 case CC_C: 132 case CC_Swift: 133 return CCCR_OK; 134 case CC_SwiftAsync: 135 return CCCR_Error; 136 default: 137 return CCCR_Warning; 138 } 139 } 140 141 bool hasBitIntType() const override { return true; } 142 143 bool hasProtectedVisibility() const override { return false; } 144 145 void adjust(DiagnosticsEngine &Diags, LangOptions &Opts) override; 146 }; 147 148 class LLVM_LIBRARY_VISIBILITY WebAssembly32TargetInfo 149 : public WebAssemblyTargetInfo { 150 public: 151 explicit WebAssembly32TargetInfo(const llvm::Triple &T, 152 const TargetOptions &Opts) 153 : WebAssemblyTargetInfo(T, Opts) { 154 if (T.isOSEmscripten()) 155 resetDataLayout("e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-f128:64-n32:64-" 156 "S128-ni:1:10:20"); 157 else 158 resetDataLayout( 159 "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"); 160 } 161 162 protected: 163 void getTargetDefines(const LangOptions &Opts, 164 MacroBuilder &Builder) const override; 165 }; 166 167 class LLVM_LIBRARY_VISIBILITY WebAssembly64TargetInfo 168 : public WebAssemblyTargetInfo { 169 public: 170 explicit WebAssembly64TargetInfo(const llvm::Triple &T, 171 const TargetOptions &Opts) 172 : WebAssemblyTargetInfo(T, Opts) { 173 LongAlign = LongWidth = 64; 174 PointerAlign = PointerWidth = 64; 175 SizeType = UnsignedLong; 176 PtrDiffType = SignedLong; 177 IntPtrType = SignedLong; 178 if (T.isOSEmscripten()) 179 resetDataLayout("e-m:e-p:64:64-p10:8:8-p20:8:8-i64:64-f128:64-n32:64-" 180 "S128-ni:1:10:20"); 181 else 182 resetDataLayout( 183 "e-m:e-p:64:64-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"); 184 } 185 186 protected: 187 void getTargetDefines(const LangOptions &Opts, 188 MacroBuilder &Builder) const override; 189 }; 190 } // namespace targets 191 } // namespace clang 192 #endif // LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H 193