1 files changed, 152 insertions, 0 deletions
diff --git a/clang/lib/Basic/Targets/WebAssembly.h b/clang/lib/Basic/Targets/WebAssembly.h
new file mode 100644
index 000000000000..9665156b143f
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+++ b/clang/lib/Basic/Targets/WebAssembly.h
@@ -0,0 +1,152 @@
+//=== WebAssembly.h - Declare WebAssembly target feature support *- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares WebAssembly TargetInfo objects.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H
+#define LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H
+
+#include "clang/Basic/TargetInfo.h"
+#include "clang/Basic/TargetOptions.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Support/Compiler.h"
+
+namespace clang {
+namespace targets {
+
+class LLVM_LIBRARY_VISIBILITY WebAssemblyTargetInfo : public TargetInfo {
+  static const Builtin::Info BuiltinInfo[];
+
+  enum SIMDEnum {
+    NoSIMD,
+    SIMD128,
+    UnimplementedSIMD128,
+  } SIMDLevel = NoSIMD;
+
+  bool HasNontrappingFPToInt = false;
+  bool HasSignExt = false;
+  bool HasExceptionHandling = false;
+  bool HasBulkMemory = false;
+  bool HasAtomics = false;
+  bool HasMutableGlobals = false;
+  bool HasMultivalue = false;
+  bool HasTailCall = false;
+
+public:
+  explicit WebAssemblyTargetInfo(const llvm::Triple &T, const TargetOptions &)
+      : TargetInfo(T) {
+    NoAsmVariants = true;
+    SuitableAlign = 128;
+    LargeArrayMinWidth = 128;
+    LargeArrayAlign = 128;
+    SimdDefaultAlign = 128;
+    SigAtomicType = SignedLong;
+    LongDoubleWidth = LongDoubleAlign = 128;
+    LongDoubleFormat = &llvm::APFloat::IEEEquad();
+    MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 64;
+    // size_t being unsigned long for both wasm32 and wasm64 makes mangled names
+    // more consistent between the two.
+    SizeType = UnsignedLong;
+    PtrDiffType = SignedLong;
+    IntPtrType = SignedLong;
+  }
+
+protected:
+  void getTargetDefines(const LangOptions &Opts,
+                        MacroBuilder &Builder) const override;
+
+private:
+  static void setSIMDLevel(llvm::StringMap<bool> &Features, SIMDEnum Level);
+
+  bool
+  initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags,
+                 StringRef CPU,
+                 const std::vector<std::string> &FeaturesVec) const override;
+  bool hasFeature(StringRef Feature) const final;
+
+  bool handleTargetFeatures(std::vector<std::string> &Features,
+                            DiagnosticsEngine &Diags) final;
+
+  bool isValidCPUName(StringRef Name) const final;
+  void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const final;
+
+  bool setCPU(const std::string &Name) final { return isValidCPUName(Name); }
+
+  ArrayRef<Builtin::Info> getTargetBuiltins() const final;
+
+  BuiltinVaListKind getBuiltinVaListKind() const final {
+    return VoidPtrBuiltinVaList;
+  }
+
+  ArrayRef<const char *> getGCCRegNames() const final { return None; }
+
+  ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const final {
+    return None;
+  }
+
+  bool validateAsmConstraint(const char *&Name,
+                             TargetInfo::ConstraintInfo &Info) const final {
+    return false;
+  }
+
+  const char *getClobbers() const final { return ""; }
+
+  bool isCLZForZeroUndef() const final { return false; }
+
+  bool hasInt128Type() const final { return true; }
+
+  IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final {
+    // WebAssembly prefers long long for explicitly 64-bit integers.
+    return BitWidth == 64 ? (IsSigned ? SignedLongLong : UnsignedLongLong)
+                          : TargetInfo::getIntTypeByWidth(BitWidth, IsSigned);
+  }
+
+  IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final {
+    // WebAssembly uses long long for int_least64_t and int_fast64_t.
+    return BitWidth == 64
+               ? (IsSigned ? SignedLongLong : UnsignedLongLong)
+               : TargetInfo::getLeastIntTypeByWidth(BitWidth, IsSigned);
+  }
+};
+class LLVM_LIBRARY_VISIBILITY WebAssembly32TargetInfo
+    : public WebAssemblyTargetInfo {
+public:
+  explicit WebAssembly32TargetInfo(const llvm::Triple &T,
+                                   const TargetOptions &Opts)
+      : WebAssemblyTargetInfo(T, Opts) {
+    resetDataLayout("e-m:e-p:32:32-i64:64-n32:64-S128");
+  }
+
+protected:
+  void getTargetDefines(const LangOptions &Opts,
+                        MacroBuilder &Builder) const override;
+};
+
+class LLVM_LIBRARY_VISIBILITY WebAssembly64TargetInfo
+    : public WebAssemblyTargetInfo {
+public:
+  explicit WebAssembly64TargetInfo(const llvm::Triple &T,
+                                   const TargetOptions &Opts)
+      : WebAssemblyTargetInfo(T, Opts) {
+    LongAlign = LongWidth = 64;
+    PointerAlign = PointerWidth = 64;
+    SizeType = UnsignedLong;
+    PtrDiffType = SignedLong;
+    IntPtrType = SignedLong;
+    resetDataLayout("e-m:e-p:64:64-i64:64-n32:64-S128");
+  }
+
+protected:
+  void getTargetDefines(const LangOptions &Opts,
+                        MacroBuilder &Builder) const override;
+};
+} // namespace targets
+} // namespace clang
+#endif // LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H