1 files changed, 124 insertions, 0 deletions
diff --git a/include/clang/AST/GlobalDecl.h b/include/clang/AST/GlobalDecl.h
new file mode 100644
index 0000000..c43e44c
--- /dev/null
+++ b/include/clang/AST/GlobalDecl.h
@@ -0,0 +1,124 @@
+//===--- GlobalDecl.h - Global declaration holder ---------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// A GlobalDecl can hold either a regular variable/function or a C++ ctor/dtor
+// together with its type.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_AST_GLOBALDECL_H
+#define LLVM_CLANG_AST_GLOBALDECL_H
+
+#include "clang/AST/DeclCXX.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/Basic/ABI.h"
+
+namespace clang {
+
+/// GlobalDecl - represents a global declaration. This can either be a
+/// CXXConstructorDecl and the constructor type (Base, Complete).
+/// a CXXDestructorDecl and the destructor type (Base, Complete) or
+/// a VarDecl, a FunctionDecl or a BlockDecl.
+class GlobalDecl {
+  llvm::PointerIntPair<const Decl*, 2> Value;
+
+  void Init(const Decl *D) {
+    assert(!isa<CXXConstructorDecl>(D) && "Use other ctor with ctor decls!");
+    assert(!isa<CXXDestructorDecl>(D) && "Use other ctor with dtor decls!");
+
+    Value.setPointer(D);
+  }
+
+public:
+  GlobalDecl() {}
+
+  GlobalDecl(const VarDecl *D) { Init(D);}
+  GlobalDecl(const FunctionDecl *D) { Init(D); }
+  GlobalDecl(const BlockDecl *D) { Init(D); }
+  GlobalDecl(const ObjCMethodDecl *D) { Init(D); }
+
+  GlobalDecl(const CXXConstructorDecl *D, CXXCtorType Type)
+  : Value(D, Type) {}
+  GlobalDecl(const CXXDestructorDecl *D, CXXDtorType Type)
+  : Value(D, Type) {}
+
+  GlobalDecl getCanonicalDecl() const {
+    GlobalDecl CanonGD;
+    CanonGD.Value.setPointer(Value.getPointer()->getCanonicalDecl());
+    CanonGD.Value.setInt(Value.getInt());
+    
+    return CanonGD;
+  }
+
+  const Decl *getDecl() const { return Value.getPointer(); }
+
+  CXXCtorType getCtorType() const {
+    assert(isa<CXXConstructorDecl>(getDecl()) && "Decl is not a ctor!");
+    return static_cast<CXXCtorType>(Value.getInt());
+  }
+
+  CXXDtorType getDtorType() const {
+    assert(isa<CXXDestructorDecl>(getDecl()) && "Decl is not a dtor!");
+    return static_cast<CXXDtorType>(Value.getInt());
+  }
+  
+  friend bool operator==(const GlobalDecl &LHS, const GlobalDecl &RHS) {
+    return LHS.Value == RHS.Value;
+  }
+  
+  void *getAsOpaquePtr() const { return Value.getOpaqueValue(); }
+
+  static GlobalDecl getFromOpaquePtr(void *P) {
+    GlobalDecl GD;
+    GD.Value.setFromOpaqueValue(P);
+    return GD;
+  }
+  
+  GlobalDecl getWithDecl(const Decl *D) {
+    GlobalDecl Result(*this);
+    Result.Value.setPointer(D);
+    return Result;
+  }
+};
+
+} // end namespace clang
+
+namespace llvm {
+  template<class> struct DenseMapInfo;
+
+  template<> struct DenseMapInfo<clang::GlobalDecl> {
+    static inline clang::GlobalDecl getEmptyKey() {
+      return clang::GlobalDecl();
+    }
+  
+    static inline clang::GlobalDecl getTombstoneKey() {
+      return clang::GlobalDecl::
+        getFromOpaquePtr(reinterpret_cast<void*>(-1));
+    }
+
+    static unsigned getHashValue(clang::GlobalDecl GD) {
+      return DenseMapInfo<void*>::getHashValue(GD.getAsOpaquePtr());
+    }
+    
+    static bool isEqual(clang::GlobalDecl LHS, 
+                        clang::GlobalDecl RHS) {
+      return LHS == RHS;
+    }
+      
+  };
+  
+  // GlobalDecl isn't *technically* a POD type. However, its copy constructor,
+  // copy assignment operator, and destructor are all trivial.
+  template <>
+  struct isPodLike<clang::GlobalDecl> {
+    static const bool value = true;
+  };
+} // end namespace llvm
+
+#endif