Put the mechanism in place to track modifications in an AST entity that were committed after

its initial creation/deserialization and store the changes in a chained PCH.

The idea is that the AST entities call methods on the ASTMutationListener to give notifications
of changes; the PCHWriter implements the ASTMutationListener interface and stores the incremental changes
of the updated entity. WIP

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@117235 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 8 insertions, 0 deletions

diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index c7b014efb5..313c2ea96b 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -20,6 +20,7 @@
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprCXX.h"
 #include "clang/AST/ExternalASTSource.h"
+#include "clang/AST/ASTMutationListener.h"
 #include "clang/AST/RecordLayout.h"
 #include "clang/Basic/Builtins.h"
 #include "clang/Basic/SourceManager.h"
@@ -5200,6 +5201,8 @@ ExternalASTSource::~ExternalASTSource() { }
 
 void ExternalASTSource::PrintStats() { }
 
+ASTMutationListener::~ASTMutationListener() { }
+
 
 //===----------------------------------------------------------------------===//
 //                          Builtin Type Computation
diff --git a/lib/AST/DeclBase.cpp b/lib/AST/DeclBase.cpp
index d60a06749d..483352f2d6 100644
--- a/lib/AST/DeclBase.cpp
+++ b/lib/AST/DeclBase.cpp
@@ -210,6 +210,10 @@ ASTContext &Decl::getASTContext() const {
   return getTranslationUnitDecl()->getASTContext();
 }
 
+ASTMutationListener *Decl::getASTMutationListener() const {
+  return getASTContext().getASTMutationListener();
+}
+
 bool Decl::isUsed(bool CheckUsedAttr) const { 
   if (Used)
     return true;
diff --git a/lib/AST/DeclCXX.cpp b/lib/AST/DeclCXX.cpp
index 8e1de4d027..f37151439f 100644
--- a/lib/AST/DeclCXX.cpp
+++ b/lib/AST/DeclCXX.cpp
@@ -14,6 +14,7 @@
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/DeclTemplate.h"
 #include "clang/AST/ASTContext.h"
+#include "clang/AST/ASTMutationListener.h"
 #include "clang/AST/CXXInheritance.h"
 #include "clang/AST/Expr.h"
 #include "clang/AST/TypeLoc.h"