genmatch.c (parser::parse_expr): Improve error message for mis-placed flags.

2015-09-17  Richard Biener  <rguenther@suse.de>

	* genmatch.c (parser::parse_expr): Improve error message
	for mis-placed flags.

From-SVN: r227859

gcc/ChangeLog

 2015-09-17  Richard Biener  <rguenther@suse.de>
 
+	* genmatch.c (parser::parse_expr): Improve error message
+	for mis-placed flags.
+
+2015-09-17  Richard Biener  <rguenther@suse.de>
+
 	* passes.c (rest_of_decl_compilation): Always call early_global_decl
 	debug hook when we created a varpool node.
 	* dwarf2out.c (dwarf2out_late_global_decl): When in LTO call

gcc/genmatch.c

@@ -3857,6 +3857,9 @@ parser::parse_expr ()
 	  e->expr_type = expr_type;
 	  return op;
 	}
+      else if (!(token->flags & PREV_WHITE))
+	fatal_at (token, "expected expression operand");
+
       e->append_op (parse_op ());
     }
   while (1);