[AST] Generate unique identifiers for CXXCtorInitializer objects.

This continues the work started in r342309 and r342315 to provide identifiers
to AST objects that are shorter and easier to read and remember than pointers.

Differential Revision: https://reviews.llvm.org/D54457

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@348198 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/AST/DeclCXX.h b/include/clang/AST/DeclCXX.h
index 3f0e5c959a633640a76084f1099006bffeea1ada..9b80d505ed7f9631db30ba499365773c2c3c3a48 100644 (file)
--- a/include/clang/AST/DeclCXX.h
+++ b/include/clang/AST/DeclCXX.h
@@ -2315,6 +2315,9 @@ public:
   CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo,
                      SourceLocation L, Expr *Init, SourceLocation R);
 
+  /// \return Unique reproducible object identifier.
+  int64_t getID(const ASTContext &Context) const;
+
   /// Determine whether this initializer is initializing a base class.
   bool isBaseInitializer() const {
     return Initializee.is<TypeSourceInfo*>() && !IsDelegating;

diff --git a/lib/AST/DeclCXX.cpp b/lib/AST/DeclCXX.cpp
index 9bb6e3a013a7c3d8927cefb2d61c84aeca0dcd24..81ee48c1829abbbc0b3c79a848257734cb50d08b 100644 (file)
--- a/lib/AST/DeclCXX.cpp
+++ b/lib/AST/DeclCXX.cpp
@@ -2246,6 +2246,14 @@ CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
     : Initializee(TInfo), Init(Init), LParenLoc(L), RParenLoc(R),
       IsDelegating(true), IsVirtual(false), IsWritten(false), SourceOrder(0) {}
 
+int64_t CXXCtorInitializer::getID(const ASTContext &Context) const {
+  Optional<int64_t> Out = Context.getAllocator().identifyObject(this);
+  assert(Out && "Wrong allocator used");
+  assert(*Out % alignof(CXXCtorInitializer) == 0 &&
+         "Wrong alignment information");
+  return *Out / alignof(CXXCtorInitializer);
+}
+
 TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
   if (isBaseInitializer())
     return Initializee.get<TypeSourceInfo*>()->getTypeLoc();