[Bug tree-optimization/59058] [4.7/4.8/4.9 Regression] wrong code at -O3 on x86_64-linux-gnu (affecting gcc 4.6 to trunk)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59058

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Nov 21 09:15:05 2013
New Revision: 205197

URL: http://gcc.gnu.org/viewcvs?rev=205197&root=gcc&view=rev
Log:
2013-11-21  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/59058
    * tree-loop-distribution.c (struct partition_s): Add plus_one
    member.
    (build_size_arg_loc): Apply niter adjustment here.
    (generate_memset_builtin): Adjust.
    (generate_memcpy_builtin): Likewise.
    (classify_partition): Do not use number_of_exit_cond_executions
    but record whether niter needs to be adjusted.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-loop-distribution.c