PR33002: When we instantiate the definition of a static data member, we might
have attached an initializer to the in-class declaration. If so, include the
initializer in the update record for the instantiation.

llvm-svn: 306065
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index dcacabe..1c0db14 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -5033,9 +5033,18 @@
       case UPD_CXX_ADDED_FUNCTION_DEFINITION:
         break;
 
-      case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER:
+      case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER: {
+        const VarDecl *VD = cast<VarDecl>(D);
         Record.AddSourceLocation(Update.getLoc());
+        if (VD->getInit()) {
+          Record.push_back(!VD->isInitKnownICE() ? 1
+                                                 : (VD->isInitICE() ? 3 : 2));
+          Record.AddStmt(const_cast<Expr*>(VD->getInit()));
+        } else {
+          Record.push_back(0);
+        }
         break;
+      }
 
       case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT:
         Record.AddStmt(const_cast<Expr *>(