[Bug target/59539] Missed optimisation: VEX-prefixed operations don't need aligned data

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59539

--- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #6)
> Created attachment 31464 [details]
> gcc49-pr59539.patch
> 
> So like this instead?  The half-merged AVX512f support makes any changes
> hard, it isn't clear if the masked variant will be needed or not, but it
> can't be handled that easily, so I've kept it in the expander name for now,
> just don't optimize it.

Yes, but why you use misaligned_operand check? This check is used in move
patterns to generate movu insn *instead of* mova. I guess that we can skip this
check entirely.