1 files changed, 135 insertions, 0 deletions
diff --git a/llvm/include/llvm/TextAPI/Symbol.h b/llvm/include/llvm/TextAPI/Symbol.h
new file mode 100644
index 000000000000..02f184d2502f
--- /dev/null
+++ b/llvm/include/llvm/TextAPI/Symbol.h
@@ -0,0 +1,135 @@
+//===- llvm/TextAPI/Symbol.h - TAPI Symbol ----------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TEXTAPI_MACHO_SYMBOL_H
+#define LLVM_TEXTAPI_MACHO_SYMBOL_H
+
+#include "llvm/ADT/BitmaskEnum.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/TextAPI/ArchitectureSet.h"
+#include "llvm/TextAPI/Target.h"
+
+namespace llvm {
+namespace MachO {
+
+// clang-format off
+
+/// Symbol flags.
+enum class SymbolFlags : uint8_t {
+  /// No flags
+  None             = 0,
+
+  /// Thread-local value symbol
+  ThreadLocalValue = 1U << 0,
+
+  /// Weak defined symbol
+  WeakDefined      = 1U << 1,
+
+  /// Weak referenced symbol
+  WeakReferenced   = 1U << 2,
+
+  /// Undefined
+  Undefined        = 1U << 3,
+
+  /// Rexported
+  Rexported        = 1U << 4,
+
+  LLVM_MARK_AS_BITMASK_ENUM(/*LargestValue=*/Rexported),
+};
+
+// clang-format on
+
+enum class SymbolKind : uint8_t {
+  GlobalSymbol,
+  ObjectiveCClass,
+  ObjectiveCClassEHType,
+  ObjectiveCInstanceVariable,
+};
+
+constexpr StringLiteral ObjC1ClassNamePrefix = ".objc_class_name_";
+constexpr StringLiteral ObjC2ClassNamePrefix = "_OBJC_CLASS_$_";
+constexpr StringLiteral ObjC2MetaClassNamePrefix = "_OBJC_METACLASS_$_";
+constexpr StringLiteral ObjC2EHTypePrefix = "_OBJC_EHTYPE_$_";
+constexpr StringLiteral ObjC2IVarPrefix = "_OBJC_IVAR_$_";
+
+using TargetList = SmallVector<Target, 5>;
+class Symbol {
+public:
+  Symbol(SymbolKind Kind, StringRef Name, TargetList Targets, SymbolFlags Flags)
+      : Name(Name), Targets(std::move(Targets)), Kind(Kind), Flags(Flags) {}
+
+  void addTarget(Target target) { Targets.emplace_back(target); }
+  SymbolKind getKind() const { return Kind; }
+  StringRef getName() const { return Name; }
+  ArchitectureSet getArchitectures() const {
+    return mapToArchitectureSet(Targets);
+  }
+  SymbolFlags getFlags() const { return Flags; }
+
+  bool isWeakDefined() const {
+    return (Flags & SymbolFlags::WeakDefined) == SymbolFlags::WeakDefined;
+  }
+
+  bool isWeakReferenced() const {
+    return (Flags & SymbolFlags::WeakReferenced) == SymbolFlags::WeakReferenced;
+  }
+
+  bool isThreadLocalValue() const {
+    return (Flags & SymbolFlags::ThreadLocalValue) ==
+           SymbolFlags::ThreadLocalValue;
+  }
+
+  bool isUndefined() const {
+    return (Flags & SymbolFlags::Undefined) == SymbolFlags::Undefined;
+  }
+
+  bool isReexported() const {
+    return (Flags & SymbolFlags::Rexported) == SymbolFlags::Rexported;
+  }
+
+  using const_target_iterator = TargetList::const_iterator;
+  using const_target_range = llvm::iterator_range<const_target_iterator>;
+  const_target_range targets() const { return {Targets}; }
+
+  using const_filtered_target_iterator =
+      llvm::filter_iterator<const_target_iterator,
+                            std::function<bool(const Target &)>>;
+  using const_filtered_target_range =
+      llvm::iterator_range<const_filtered_target_iterator>;
+  const_filtered_target_range targets(ArchitectureSet architectures) const;
+
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+  void dump(raw_ostream &OS) const;
+  void dump() const { dump(llvm::errs()); }
+#endif
+
+  bool operator==(const Symbol &O) const {
+    return std::tie(Name, Kind, Targets, Flags) ==
+           std::tie(O.Name, O.Kind, O.Targets, O.Flags);
+  }
+
+  bool operator!=(const Symbol &O) const { return !(*this == O); }
+
+  bool operator<(const Symbol &O) const {
+    return std::tie(Name, Kind, Targets, Flags) <
+           std::tie(O.Name, O.Kind, O.Targets, O.Flags);
+  }
+
+private:
+  StringRef Name;
+  TargetList Targets;
+  SymbolKind Kind;
+  SymbolFlags Flags;
+};
+
+} // end namespace MachO.
+} // end namespace llvm.
+
+#endif // LLVM_TEXTAPI_MACHO_SYMBOL_H