[Bug rtl-optimization/77541] [7 Regression] wrong code with 512bit vectors of int128 @ -O1

[vmakarov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77541

--- Comment #4 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #2)
> (In reply to Uroš Bizjak from comment #1)
> > This is RA failure, where reload tries to fix up:
> 
> To be clear, it is LRA pass, not reload.

Yes, it is a LRA bug.  I can not reproduce it with -O but I reproduced it with
-O2.

I am working on it.  I hope to have a fix at the end of week.