re PR middle-end/56461 (GCC is leaking lots of memory)

	PR middle-end/56461
	* tree-vect-stmts.c (vectorizable_conversion): Don't call
	vec_oprnds0.create (1) for modifier == NONE.

From-SVN: r196426

gcc/ChangeLog

 2013-03-04  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/56461
+	* tree-vect-stmts.c (vectorizable_conversion): Don't call
+	vec_oprnds0.create (1) for modifier == NONE.
+
+	PR middle-end/56461
 	* tree-vect-stmts.c (vectorizable_shift): Don't call create methods
 	on vec_oprnds0 or vec_oprnds1 before loop, only call it on
 	vec_oprnds1 right before pushing anything to it for

gcc/tree-vect-stmts.c

@@ -2616,15 +2616,13 @@ vectorizable_conversion (gimple stmt, gimple_stmt_iterator *gsi,
 
   if (!slp_node)
     {
-      if (modifier == NONE)
-	vec_oprnds0.create (1);
-      else if (modifier == WIDEN)
+      if (modifier == WIDEN)
 	{
 	  vec_oprnds0.create (multi_step_cvt ? vect_pow2(multi_step_cvt) : 1);
 	  if (op_type == binary_op)
 	    vec_oprnds1.create (1);
 	}
-      else
+      else if (modifier == NARROW)
 	vec_oprnds0.create (
 		   2 * (multi_step_cvt ? vect_pow2 (multi_step_cvt) : 1));
     }