[Bug tree-optimization/46886] [4.5/4.6 Regression] wrong code with -ftree-parallelize-loops -fno-tree-ch

[razya at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46886

--- Comment #14 from razya at gcc dot gnu.org 2012-04-22 10:36:18 UTC ---
Author: razya
Date: Sun Apr 22 10:36:13 2012
New Revision: 186667

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186667
Log:
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.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-cfg.c
    trunk/gcc/tree-parloops.c