https://sourceware.org/bugzilla/show_bug.cgi?id=26685
Jan Beulich <jbeulich at suse dot com> changed:
What |Removed |Added
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CC| |jbeulich at suse dot com
--- Comment #3 from Jan Beulich <jbeulich at suse dot com> ---
(In reply to H.J. Lu from comment #0)
> [hjl@gnu-cfl-2 gcc]$ cat x.s
> movdir64b (%rdx), %rax
> movdir64b (%edx), %eax
> movdir64b foo(%rip), %rax
> movdir64b foo(%eip), %eax
> movdir64b foo(%rip), %eax
> [hjl@gnu-cfl-2 gcc]$ gcc -c x.s
> x.s: Assembler messages:
> x.s:5: Error: invalid register operand size for `movdir64b'
Which is intended, expected, and correct behavior.
> [hjl@gnu-cfl-2 gcc]$
>
> movdir64b foo(%rip), %eax
>
> should be treated as
>
> movdir64b foo(%eip), %eax
We should not silently change what the programmer has (mistakenly) written, as
it's ambiguous what would be meant: Could be they meant 32-bit addressing, but
could also be they means 64-bit one.
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