Correcting transform_to_exit_first_loop + fix to PR tree-optimization/46886

Correcting transform_to_exit_first_loop + fix to PR tree-optimization/46886

2012-04-20  Razya Ladelsky  <razya@il.ibm.com>
                 Correcting transform_to_exit_first_loop + fix to
                 PR tree-optimization/46886
                 * tree-parloops.c (transform_to_exit_first_loop):
                 * Remove setting of number of iterations according to
                 * the loop pattern.
                 Duplicate from entry to exit->src instead of
loop->latch.
                 (pallelize_loops): Remove the condition preventing
do-while loops.
                 * tree-cfg.c (bool bb_in_region_p): New.
                 (gimple_duplicate_sese_tail): Adjust duplication of the
the subloops.
                 Adjust redirection of the duplicated iteration.

From-SVN: r186667