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