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: WebAssemblyTargetInfo(const llvm::Triple & T,const TargetOptions &)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 setCPU(const std::string & Name)89 bool setCPU(const std::string &Name) final { return isValidCPUName(Name); } 90 91 ArrayRef<Builtin::Info> getTargetBuiltins() const final; 92 getBuiltinVaListKind()93 BuiltinVaListKind getBuiltinVaListKind() const final { 94 return VoidPtrBuiltinVaList; 95 } 96 getGCCRegNames()97 ArrayRef<const char *> getGCCRegNames() const final { return None; } 98 getGCCRegAliases()99 ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const final { 100 return None; 101 } 102 validateAsmConstraint(const char * & Name,TargetInfo::ConstraintInfo & Info)103 bool validateAsmConstraint(const char *&Name, 104 TargetInfo::ConstraintInfo &Info) const final { 105 return false; 106 } 107 getClobbers()108 const char *getClobbers() const final { return ""; } 109 isCLZForZeroUndef()110 bool isCLZForZeroUndef() const final { return false; } 111 hasInt128Type()112 bool hasInt128Type() const final { return true; } 113 getIntTypeByWidth(unsigned BitWidth,bool IsSigned)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 getLeastIntTypeByWidth(unsigned BitWidth,bool IsSigned)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 checkCallingConvention(CallingConv CC)127 CallingConvCheckResult checkCallingConvention(CallingConv CC) const override { 128 switch (CC) { 129 case CC_C: 130 case CC_Swift: 131 return CCCR_OK; 132 default: 133 return CCCR_Warning; 134 } 135 } 136 hasExtIntType()137 bool hasExtIntType() const override { return true; } 138 hasProtectedVisibility()139 bool hasProtectedVisibility() const override { return false; } 140 141 void adjust(LangOptions &Opts) override; 142 }; 143 144 class LLVM_LIBRARY_VISIBILITY WebAssembly32TargetInfo 145 : public WebAssemblyTargetInfo { 146 public: WebAssembly32TargetInfo(const llvm::Triple & T,const TargetOptions & Opts)147 explicit WebAssembly32TargetInfo(const llvm::Triple &T, 148 const TargetOptions &Opts) 149 : WebAssemblyTargetInfo(T, Opts) { 150 resetDataLayout("e-m:e-p:32:32-i64:64-n32:64-S128-ni:1"); 151 } 152 153 protected: 154 void getTargetDefines(const LangOptions &Opts, 155 MacroBuilder &Builder) const override; 156 }; 157 158 class LLVM_LIBRARY_VISIBILITY WebAssembly64TargetInfo 159 : public WebAssemblyTargetInfo { 160 public: WebAssembly64TargetInfo(const llvm::Triple & T,const TargetOptions & Opts)161 explicit WebAssembly64TargetInfo(const llvm::Triple &T, 162 const TargetOptions &Opts) 163 : WebAssemblyTargetInfo(T, Opts) { 164 LongAlign = LongWidth = 64; 165 PointerAlign = PointerWidth = 64; 166 SizeType = UnsignedLong; 167 PtrDiffType = SignedLong; 168 IntPtrType = SignedLong; 169 resetDataLayout("e-m:e-p:64:64-i64:64-n32:64-S128-ni:1"); 170 } 171 172 protected: 173 void getTargetDefines(const LangOptions &Opts, 174 MacroBuilder &Builder) const override; 175 }; 176 } // namespace targets 177 } // namespace clang 178 #endif // LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H 179