[Bug tree-optimization/81309] [8 regression] gcc.dg/vect/pr79347.c FAILs

["rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81309

--- Comment #1 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 4 Jul 2017, ro at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81309
> 
>             Bug ID: 81309
>            Summary: [8 regression] gcc.dg/vect/pr79347.c FAILs
>            Product: gcc
>            Version: 8.0
>             Status: UNCONFIRMED
>           Severity: normal
>           Priority: P3
>          Component: tree-optimization
>           Assignee: unassigned at gcc dot gnu.org
>           Reporter: ro at gcc dot gnu.org
>                 CC: rguenth at gcc dot gnu.org
>   Target Milestone: ---
> 
> Between 20170630 (r249833) and 20170702 (r249882), the gcc.dg/vect/pr79347.c
> test
> started to FAIL (seen on i386-pc-solaris2.12, both 32 and 64-bit, according
> to gcc-testresults on many targets):
> 
> +FAIL: gcc.dg/vect/pr79347.c -flto -ffat-lto-objects  scan-tree-dump-not vect
> "I
> nvalid sum of "
> +FAIL: gcc.dg/vect/pr79347.c scan-tree-dump-not vect "Invalid sum of "
> 
> Maybe this is due to
> 
> 2017-06-30  Richard Biener  <rguenther@suse.de>
> 
>         * tree-vect-slp.c (vect_slp_analyze_node_operations): Only
>         analyze the first scalar stmt.  Move vector type computation
>         for the BB case here from ...
>         * tree-vect-stmts.c (vect_analyze_stmt): ... here.  Guard
>         live operation processing in the SLP case properly.

I think Honza fixed this with

2017-07-03  Jan Hubicka  <hubicka@ucw.cz>

        * tree-vect-loop-manip.c (vect_do_peeling): Fix scaling up.