[Bug tree-optimization/69719] [5/6 Regression] wrong code at -O3 on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69719

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's a broken runtime alias check.  Probably no longer latent since

2015-11-10  James Greenhalgh  <james.greenhalgh@arm.com>

        Partial backport from trunk r228751.
        PR tree-optimization/68238
        2015-10-13  Richard Biener  <rguenther@suse.de>

        * tree-vect-loop.c (vect_estimate_min_profitable_iters): Use
        LOOP_VINFO_COMP_ALIAS_DDRS to estimate alias versioning cost.

on the branch.