expr.c (do_store_flag): Don't crash if either side of a comparison is error_mark_node.

2000-10-24  Andrew Haley  <aph@cygnus.co.uk>

        * expr.c (do_store_flag): Don't crash if either side of a
        comparison is error_mark_node.

From-SVN: r37036

gcc/ChangeLog

+2000-10-24  Andrew Haley  <aph@cygnus.co.uk>
+
+	* expr.c (do_store_flag): Don't crash if either side of a
+	comparison is error_mark_node.
+
 2000-10-24  Jakub Jelinek  <jakub@redhat.com>
 
 	* sibcall.c (purge_mem_unchanging_flag): New function.

gcc/expr.c

@@ -10133,6 +10133,11 @@ do_store_flag (exp, target, mode, only_cheap)
 
   arg0 = TREE_OPERAND (exp, 0);
   arg1 = TREE_OPERAND (exp, 1);
+
+  /* Don't crash if the comparison was erroneous.  */
+  if (arg0 == error_mark_node || arg1 == error_mark_node)
+    return const0_rtx;
+
   type = TREE_TYPE (arg0);
   operand_mode = TYPE_MODE (type);
   unsignedp = TREE_UNSIGNED (type);