[Bug tree-optimization/68951] [6 Regression] ICE in vect_update_misalignment_for_peel

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68951

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-*-* aarch64-*-*
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |5.3.0
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|                            |2015-12-17
     Ever confirmed|0                           |1
            Summary|ICE on x86_64-pc-linux-gnu  |[6 Regression] ICE in
                   |at -O3 in both 32-bit and   |vect_update_misalignment_fo
                   |64-bit modes (in            |r_peel
                   |vect_update_misalignment_fo |
                   |r_peel, at                  |
                   |tree-vect-data-refs.c:889)  |
   Target Milestone|---                         |6.0

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed also on aarch64-linux-gnu.

Note once I change g_534's last dimension to be anything other than 1, the ICE
goes away.

Note also this is undefined code at runtime as you are accessing outside of the
bounds of the array.