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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/52381] asm goto output operands diagnostics
Date: Mon, 27 Feb 2012 09:24:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52381

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |diagnostic
   Last reconfirmed|                            |2012-02-27
     Ever Confirmed|0                           |1
            Summary|asm goto output operands    |asm goto output operands
                   |                            |diagnostics
           Severity|enhancement                 |normal

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-27 09:22:52 UTC ---
I don't think asm goto was designed to contain more than a computed jump
instruction.  And I don't know how reliably we could allocate registers
for outputs on the multiple outgoing edges.

So, it's definitely by design.

Confirmed for the diagnostic issue.