Fix ia64 scheduler/predicated insn bug report from SAP.

	* sched-deps.c (add_dependence): When elide conditional dependence,
	check that insn doesn't modify cond2.

From-SVN: r45938

gcc/ChangeLog

+2001-10-01  Jim Wilson  <wilson@redhat.com>
+
+	* sched-deps.c (add_dependence): When elide conditional dependence,
+	check that insn doesn't modify cond2.
+
 2001-10-01  Dale Johannesen  <dalej@apple.com>
 
 	* config/rs6000/rs6000.h (enum processor_type): Add support

gcc/sched-deps.c

@@ -222,7 +222,12 @@ add_dependence (insn, elem, dep_type)
       cond2 = get_condition (elem);
       if (cond1 && cond2
 	  && conditions_mutex_p (cond1, cond2)
-	  && !modified_in_p (cond1, elem))
+	  /* Make sure first instruction doesn't affect condition of second
+	     instruction if switched.  */
+	  && !modified_in_p (cond1, elem)
+	  /* Make sure second instruction doesn't affect condition of first
+	     instruction if switched.  */
+	  && !modified_in_p (cond2, insn))
 	return;
     }