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[Bug gas/26685] Error: invalid register operand size for `movdir64b'

From: jbeulich at suse dot com
Subject: [Bug gas/26685] Error: invalid register operand size for `movdir64b'
Date: Thu, 01 Oct 2020 11:37:36 +0000


--- Comment #5 from Jan Beulich <jbeulich at suse dot com> ---
(In reply to H.J. Lu from comment #4)
> This specific case came from
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97257
> The address prefix changes the register operand in these instructions.
> (%rip) is a special case.

Which address prefix? There's not enough data in that bug for me to understand.
But in any event, it's gcc producing wrong code then, and hence the issue
should be fixed there, rather than silently "correcting" ambiguous code in gas.

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