2009-10-22 Razya Ladelsky <razya@il.ibm.com>

2009-10-22  Razya Ladelsky  <razya@il.ibm.com>

        * cfgloopmanip.c  (duplicate_subloops): Export.
        * tree-parloops.c (loop_parallel_p): Dump if loop is innermost.
        (transform_to_exit_first_loop): Duplicate bbs starting from
        header up to loop->latch instead of exit->src.
        Initialize control variable to the correct number of iterations.
        (gather_scalar_reductions): Do not register double reductions.
        (parallelize_loops): Dump which loop is tested.
        Indicate whether the parallelized loop is inner or not.
        Remove the innermost-loop requirement.
        * cfgloop.h (duplicate_subloops): Export.
        * tree-cfg.c (add_phi_args_after_redirect): New function.
        (gimple_duplicate_sese_tail): Remove the no-subloops constraint.
        Call duplicate_subloops.
        Update number of iterations at the exit condition.
        Don't redirect nexits always to the loop exit.
        Redirect copied edges from latch to the loop exit.
        * testsuite/libgomp.graphite/force-parallel-2.c: Adjust scan.
        * testsuite/gcc.dg/autopar/outer-1.c: New testcase.
        * testsuite/gcc.dg/autopar/outer-2.c: New testcase.
        * testsuite/gcc.dg/autopar/outer-3.c: New testcase.
        * testsuite/gcc.dg/autopar/outer-4.c: New testcase.
        * testsuite/gcc.dg/autopar/outer-5.c: New testcase.
        * testsuite/gcc.dg/autopar/outer-6.c: New testcase.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@153457 138bc75d-0d04-0410-961f-82ee72b054a4