[Bug tree-optimization/115395] [15 regression] libarchive miscompiled with -O2 -march=znver2 -fno-vect-cost-model

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115395

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2024-06-08
             Status|UNCONFIRMED                 |NEW

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

Looks like it is doing the add twice:
```
  vect_offset_14.29_104 = _84 + vect__18.28_103;
  _106 = .REDUC_PLUS (vect_offset_14.29_104);
  _107 = offset_9 + _106;
```

Once before the reduction and once after.