re PR objc/69844 (Possibly bogus error: unknown type name in ObjC code)

	PR objc/69844
	* c-parser.c (c_parser_for_statement): Properly handle ObjC classes
	in id_kind reclassification.

	* objc.dg/pr69844.m: New test.

From-SVN: r233643

gcc/c/ChangeLog

+2016-02-23  Jakub Jelinek  <jakub@redhat.com>
+
+	PR objc/69844
+	* c-parser.c (c_parser_for_statement): Properly handle ObjC classes
+	in id_kind reclassification.
+
 2016-02-16  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/69835

gcc/c/c-parser.c

@@ -5886,13 +5886,30 @@ c_parser_for_statement (c_parser *parser, bool ivdep)
   if (c_parser_next_token_is (parser, CPP_NAME))
     {
       c_token *token = c_parser_peek_token (parser);
-      tree decl = lookup_name (token->value);
-      if (decl == NULL_TREE || VAR_P (decl))
-	/* If DECL is null, we don't know what this token might be.  Treat
-	   it as an ID for better diagnostics; we'll error later on.  */
-	token->id_kind = C_ID_ID;
-      else if (TREE_CODE (decl) == TYPE_DECL)
-	token->id_kind = C_ID_TYPENAME;
+
+      if (token->id_kind != C_ID_CLASSNAME)
+	{
+	  tree decl = lookup_name (token->value);
+
+	  token->id_kind = C_ID_ID;
+	  if (decl)
+	    {
+	      if (TREE_CODE (decl) == TYPE_DECL)
+		token->id_kind = C_ID_TYPENAME;
+	    }
+	  else if (c_dialect_objc ())
+	    {
+	      tree objc_interface_decl = objc_is_class_name (token->value);
+	      /* Objective-C class names are in the same namespace as
+		 variables and typedefs, and hence are shadowed by local
+		 declarations.  */
+	      if (objc_interface_decl)
+		{
+		  token->value = objc_interface_decl;
+		  token->id_kind = C_ID_CLASSNAME;
+		}
+	    }
+	}
     }
 
   token_indent_info next_tinfo

gcc/testsuite/ChangeLog

+2016-02-23  Jakub Jelinek  <jakub@redhat.com>
+
+	PR objc/69844
+	* objc.dg/pr69844.m: New test.
+
 2016-02-23  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR libgfortran/69456

gcc/testsuite/objc.dg/pr69844.m

+/* PR objc/69844 */
+/* { dg-do compile } */
+/* { dg-options "-std=gnu99" } */
+
+@class D;
+
+void
+foo (void)
+{
+  for (;;)
+    ;
+  D *d = (id) 0;
+  (void) d;
+}
+
+void
+bar (void)
+{
+  for (int D = 0; D < 30; D++)
+    if (1)
+      ;
+  D *d = (id) 0;
+  (void) d;
+}