* var-tracking.c (dataflow_set_merge): Swap src and src2.

* var-tracking.c (dataflow_set_merge): Swap src and src2.
Reverted:
2010-01-13  Jakub Jelinek  <jakub@redhat.com>
PR debug/41371
* var-tracking.c (values_to_unmark): New variable.
(find_loc_in_1pdv): Clear VALUE_RECURSED_INTO of values in
values_to_unmark vector.  Moved body to...
(find_loc_in_1pdv_1): ... this.  Don't clear VALUE_RECURSED_INTO,
instead queue it into values_to_unmark vector.
(vt_find_locations): Free values_to_unmark vector.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@157257 138bc75d-0d04-0410-961f-82ee72b054a4