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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/57690] bextr sometimes used instead of shr
Date: Sun, 30 Jun 2013 09:48:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D57690

Uro=C5=A1 Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-06-30
     Ever confirmed|0                           |1

--- Comment #1 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
For some reason combine simplifies

  (zero_extend:DI (lshiftrt:SI (reg:SI 0 ax [orig:65 D.1730 ] [65])
                        (const_int 2 [0x2]))))

to=20

  (set (reg:DI 0 ax [orig:64 D.1733 ] [64])
       (zero_extract:DI (reg:DI 0 ax [orig:59 D.1732 ] [59])
                    (const_int 30 [0x1e])
                    (const_int 2 [0x2])))

perhaps correct RTX costs could prevent this transformation for -Os?
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Subject: [Bug preprocessor/57760] preprocessor directive supress g++ warning
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57760

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
Use -Wsystem-headers.  The directive marks the following contents as a system
header.