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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/66652] try_transform_to_exit_first_loop_alt generates incorrect loop
Date: Tue, 30 Jun 2015 08:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66652

--- Comment #5 from vries at gcc dot gnu.org ---
Author: vries
Date: Tue Jun 30 08:35:57 2015
New Revision: 225162

URL: https://gcc.gnu.org/viewcvs?rev=225162&root=gcc&view=rev
Log:
Use max_loop_iterations in transform_to_exit_first_loop_alt

2015-06-30  Tom de Vries  <tom@codesourcery.com>

        PR tree-optimization/66652
        * tree-parloops.c (try_transform_to_exit_first_loop_alt): Use
        max_loop_iterations to determine if nit + 1 overflows.

        * testsuite/libgomp.c/parloops-exit-first-loop-alt-3.c (f): Rewrite
        using restrict pointers.
        (main): Add arguments to calls to f.
        * testsuite/libgomp.c/parloops-exit-first-loop-alt.c: Same.

        * gcc.dg/parloops-exit-first-loop-alt-pr66652.c: New test.
        * gcc.dg/parloops-exit-first-loop-alt-3.c (f):  Rewrite using restrict
        pointers.
        * gcc.dg/parloops-exit-first-loop-alt.c: Same.

Added:
    trunk/gcc/testsuite/gcc.dg/parloops-exit-first-loop-alt-pr66652.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/parloops-exit-first-loop-alt-3.c
    trunk/gcc/testsuite/gcc.dg/parloops-exit-first-loop-alt.c
    trunk/gcc/tree-parloops.c
    trunk/libgomp/ChangeLog
    trunk/libgomp/testsuite/libgomp.c/parloops-exit-first-loop-alt-3.c
    trunk/libgomp/testsuite/libgomp.c/parloops-exit-first-loop-alt.c