re PR rtl-optimization/77425 (Pointer test follows dereference in sched-int.h)

	PR rtl-optimization/77425
	* sched-int.h (sd_iterator_cond): Don't update it_ptr->linkp if list
	is NULL.

From-SVN: r240163

gcc/ChangeLog

 2016-09-15  Jakub Jelinek  <jakub@redhat.com>
 
+	PR rtl-optimization/77425
+	* sched-int.h (sd_iterator_cond): Don't update it_ptr->linkp if list
+	is NULL.
+
 	PR middle-end/77475
 	* config/i386/i386.c (ix86_parse_stringop_strategy_string): Simplify,
 	use %qs instead of %s where desirable, use argument instead of arg in

gcc/sched-int.h

@@ -1624,10 +1624,11 @@ sd_iterator_cond (sd_iterator_def *it_ptr, dep_t *dep_ptr)
 	      sd_next_list (it_ptr->insn,
 			    &it_ptr->types, &list, &it_ptr->resolved_p);
 
-	      it_ptr->linkp = &DEPS_LIST_FIRST (list);
-
 	      if (list)
-		continue;
+		{
+		  it_ptr->linkp = &DEPS_LIST_FIRST (list);
+		  continue;
+		}
 	    }
 
 	  *dep_ptr = NULL;