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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/67731] Combine of OR'ed bitfields should use bit-test
Date: Mon, 28 Sep 2015 11:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67731

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-09-28
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, so usually this gets optimized by fold-const.c optimize_bit_field_compare
but
appearantly that doesn't work here.  Not that I like this function very much...