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 UnimplementedSIMD128, 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 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 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 bool handleTargetFeatures(std::vector<std::string> &Features, 81 DiagnosticsEngine &Diags) final; 82 83 bool isValidCPUName(StringRef Name) const final; 84 void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const final; 85 86 bool setCPU(const std::string &Name) final { return isValidCPUName(Name); } 87 88 ArrayRef<Builtin::Info> getTargetBuiltins() const final; 89 90 BuiltinVaListKind getBuiltinVaListKind() const final { 91 return VoidPtrBuiltinVaList; 92 } 93 94 ArrayRef<const char *> getGCCRegNames() const final { return None; } 95 96 ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const final { 97 return None; 98 } 99 100 bool validateAsmConstraint(const char *&Name, 101 TargetInfo::ConstraintInfo &Info) const final { 102 return false; 103 } 104 105 const char *getClobbers() const final { return ""; } 106 107 bool isCLZForZeroUndef() const final { return false; } 108 109 bool hasInt128Type() const final { return true; } 110 111 IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final { 112 // WebAssembly prefers long long for explicitly 64-bit integers. 113 return BitWidth == 64 ? (IsSigned ? SignedLongLong : UnsignedLongLong) 114 : TargetInfo::getIntTypeByWidth(BitWidth, IsSigned); 115 } 116 117 IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final { 118 // WebAssembly uses long long for int_least64_t and int_fast64_t. 119 return BitWidth == 64 120 ? (IsSigned ? SignedLongLong : UnsignedLongLong) 121 : TargetInfo::getLeastIntTypeByWidth(BitWidth, IsSigned); 122 } 123 124 CallingConvCheckResult checkCallingConvention(CallingConv CC) const override { 125 switch (CC) { 126 case CC_C: 127 case CC_Swift: 128 return CCCR_OK; 129 default: 130 return CCCR_Warning; 131 } 132 } 133 134 bool hasExtIntType() const override { return true; } 135 136 bool hasProtectedVisibility() const override { return false; } 137 }; 138 139 class LLVM_LIBRARY_VISIBILITY WebAssembly32TargetInfo 140 : public WebAssemblyTargetInfo { 141 public: 142 explicit WebAssembly32TargetInfo(const llvm::Triple &T, 143 const TargetOptions &Opts) 144 : WebAssemblyTargetInfo(T, Opts) { 145 resetDataLayout("e-m:e-p:32:32-i64:64-n32:64-S128"); 146 } 147 148 protected: 149 void getTargetDefines(const LangOptions &Opts, 150 MacroBuilder &Builder) const override; 151 }; 152 153 class LLVM_LIBRARY_VISIBILITY WebAssembly64TargetInfo 154 : public WebAssemblyTargetInfo { 155 public: 156 explicit WebAssembly64TargetInfo(const llvm::Triple &T, 157 const TargetOptions &Opts) 158 : WebAssemblyTargetInfo(T, Opts) { 159 LongAlign = LongWidth = 64; 160 PointerAlign = PointerWidth = 64; 161 SizeType = UnsignedLong; 162 PtrDiffType = SignedLong; 163 IntPtrType = SignedLong; 164 resetDataLayout("e-m:e-p:64:64-i64:64-n32:64-S128"); 165 } 166 167 protected: 168 void getTargetDefines(const LangOptions &Opts, 169 MacroBuilder &Builder) const override; 170 }; 171 } // namespace targets 172 } // namespace clang 173 #endif // LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H 174