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