[Bug tree-optimization/107254] [11 Regression] Wrong vectorizer code (GCC 11 only, Fortran)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107254

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |needs-bisection

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #1)
> Fixed with r12-2051-g7d810646d421f697 and started with
> r11-2453-gc89366b12ff4f362.
> 
> @Richi: Can you please take a look?

Can you bisect with -fno-vect-cost-model?  The r11-2453-gc89366b12ff4f362 just
affects cost modeling.

And yes, the "fix" eventually just hides a SLP pattern bug.