[Bug tree-optimization/65443] Don't peel last iteration from loop in transform_to_exit_first_loop

["vries at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65443

--- Comment #18 from vries at gcc dot gnu.org ---
Author: vries
Date: Fri Jun  5 15:57:34 2015
New Revision: 224154

URL: https://gcc.gnu.org/viewcvs?rev=224154&root=gcc&view=rev
Log:
Add transform_to_exit_first_loop_alt

2015-06-05  Tom de Vries  <tom@codesourcery.com>

        merge from gomp4 branch:
        2015-05-28  Tom de Vries  <tom@codesourcery.com>

        PR tree-optimization/65443
        * tree-parloops.c (replace_imm_uses, replace_uses_in_bb_by)
        (replace_uses_in_bbs_by, transform_to_exit_first_loop_alt)
        (try_transform_to_exit_first_loop_alt): New function.
        (transform_to_exit_first_loop): Use
        try_transform_to_exit_first_loop_alt.

        * gcc.dg/parloops-exit-first-loop-alt-2.c: New test.
        * gcc.dg/parloops-exit-first-loop-alt-3.c: New test.
        * gcc.dg/parloops-exit-first-loop-alt.c: New test.

        * testsuite/libgomp.c/parloops-exit-first-loop-alt-2.c: New test.
        * testsuite/libgomp.c/parloops-exit-first-loop-alt-3.c: New test.
        * testsuite/libgomp.c/parloops-exit-first-loop-alt.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/parloops-exit-first-loop-alt-2.c
    trunk/gcc/testsuite/gcc.dg/parloops-exit-first-loop-alt-3.c
    trunk/gcc/testsuite/gcc.dg/parloops-exit-first-loop-alt.c
    trunk/libgomp/testsuite/libgomp.c/parloops-exit-first-loop-alt-2.c
    trunk/libgomp/testsuite/libgomp.c/parloops-exit-first-loop-alt-3.c
    trunk/libgomp/testsuite/libgomp.c/parloops-exit-first-loop-alt.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-parloops.c
    trunk/libgomp/ChangeLog