[Bug target/94298] x86 duplicates loads

[rguenther at suse dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94298

--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 24 Mar 2020, ubizjak at gmail dot com wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94298
> 
> --- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
> (In reply to rguenther@suse.de from comment #2)
> 
> > So I wonder whether the bug is that there is a memory alternative
> > in the first place?
> 
> Memory alternative should be OK, we do have insns that access memory. Perhaps
> vec_interleave_high/vec_interleave_low shouldn't be used by middel end in this
> particular case?

It's going through the generic vec_perm_const expander.