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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/67242] Missing optimization with float IV in SCEV-CCP
Date: Mon, 17 Aug 2015 07:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67242

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-08-17
            Summary|Missing optimization with   |Missing optimization with
                   |float                       |float IV in SCEV-CCP
     Ever confirmed|0                           |1
      Known to fail|                            |5.2.0

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  This is SCEV-const-prop not handling floats (obviously).  The trick
could be to handle this kind of DEFs of loop-closed PHI uses specially
(use the evolution of the source).