[Bug target/66866] [miscompile] incorrect load address on manual vector shuffle

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66866

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |ASSIGNED
                 CC|uros at gcc dot gnu.org            |
           Assignee|unassigned at gcc dot gnu.org      |ubizjak at gmail dot com

--- Comment #6 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #5)
> "Safe" fix:

No, no... pextr to a temporary should be used here.

I plan to introduce pextr handling to "insv<mode>" pattern. Then,
ix86_expand_pinsr will call ix86_expand_pextr for non-lowpart src subregs (and
in a similar way, new ix86_expand_pextr will call ix86_expand_pinsr for
non-lowpart dst subregs).