https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66852

--- Comment #10 from Jeffrey Walton <noloader at gmail dot com> ---
(In reply to Richard Biener from comment #6)
> So I suppose the IsAligned template is wrong.

So I'm clear (please forgive my ignorance)...

According to http://www.felixcloutier.com/x86/MOVDQA.html, vmovdqa requires
values double quad word alignment (16-byte). A word64 is aligned on 8-bytes,
and does not meet the precondition to use the instruction. Naively, that seems
like a problem to me.

Will that create problems with GCC and vectorizations?

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