[Bug gas/21874] x86: Multiple segment registers in the address are not detected with -masm=intel

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21874

--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jan Beulich from comment #11)
> (In reply to H.J. Lu from comment #10)
> > > > In the case of "fs:gs:[eax]", you can replace it with
> > > > "fs:[eax]" to get the same output.
> > > 
> > > In straight line code yes. But what if a first override is hidden deep in 
> > > a
> > > macro you can't or don't want to modify, but you need to add an override 
> > > to
> > > in one special case?
> > 
> > Do you have a real example?
> 
> No, I don't. But I don't assume you have a real example of someone having
> used something like fs:foo:[ebx] either, to support your original change.
> The reporter's example, as he states, did not result in bad code being
> generated (and for that case accepting the code was the intended behavior).

Someone bothered enough to open a bug report with a testcase.  That is
good enough for me.

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