modulo-sched.c (schedule_reg_moves): Clear distance1_uses if it is newly allocated.

2014-01-02  Felix Yang  <fei.yang0953@gmail.com>

	* modulo-sched.c (schedule_reg_moves): Clear distance1_uses if it
	is newly allocated.

From-SVN: r206366

gcc/ChangeLog

+2014-01-02  Felix Yang  <fei.yang0953@gmail.com>
+
+	* modulo-sched.c (schedule_reg_moves): Clear distance1_uses if it
+	is newly allocated.
+
 2014-01-06  Richard Earnshaw  <rearnsha@arm.com>
 
 	* aarch64.c (aarch64_rtx_costs): Fix cost calculation for MADD.

gcc/modulo-sched.c

@@ -766,6 +766,9 @@ schedule_reg_moves (partial_schedule_ptr ps)
 
       distance1_uses = distances[1] ? sbitmap_alloc (g->num_nodes) : NULL;
 
+      if (distance1_uses)
+	bitmap_clear (distance1_uses);
+
       /* Every use of the register defined by node may require a different
 	 copy of this register, depending on the time the use is scheduled.
 	 Record which uses require which move results.  */