When setting the anonymous namespace at PCH reading, it may still be initializing so avoid

the invariant checks at NamespaceDecl::setAnonymousNamespace().

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@107566 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/AST/Decl.h

@@ -344,6 +344,9 @@ public:
   static NamespaceDecl *castFromDeclContext(const DeclContext *DC) {
     return static_cast<NamespaceDecl *>(const_cast<DeclContext*>(DC));
   }
+  
+  friend class PCHDeclReader;
+  friend class PCHDeclWriter;
 };
 
 /// ValueDecl - Represent the declaration of a variable (in which case it is

lib/Frontend/PCHReaderDecl.cpp

@@ -564,13 +564,9 @@ void PCHDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
   D->setNextNamespace(
                     cast_or_null<NamespaceDecl>(Reader.GetDecl(Record[Idx++])));
 
-  // Only read one reference--the original or anonymous namespace.
   bool IsOriginal = Record[Idx++];
-  if (IsOriginal)
-    D->setAnonymousNamespace(
-                    cast_or_null<NamespaceDecl>(Reader.GetDecl(Record[Idx++])));
-  else
-    D->setOriginalNamespace(
+  D->OrigOrAnonNamespace.setInt(IsOriginal);
+  D->OrigOrAnonNamespace.setPointer(
                     cast_or_null<NamespaceDecl>(Reader.GetDecl(Record[Idx++])));
 }
 

test/PCH/cxx-namespaces.cpp

@@ -0,0 +1,10 @@
+// Test this without pch.
+// RUN: %clang_cc1 -include %S/cxx-namespaces.h -fsyntax-only -verify %s
+
+// Test with pch.
+// RUN: %clang_cc1 -x c++-header -emit-pch -o %t %S/cxx-namespaces.h
+// RUN: %clang_cc1 -include-pch %t -fsyntax-only -verify %s 
+
+void m() {
+  N::x = 0;
+}

test/PCH/cxx-namespaces.h

@@ -0,0 +1,7 @@
+// Header for PCH test cxx-namespaces.cpp
+
+namespace N {
+    namespace {
+        int x;
+    }
+}