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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/57521] [4.7/4.8/4.9 Regression] wrong code for expressions in loop at -O3
Date: Mon, 24 Jun 2013 13:48:00 -0000	[thread overview]
Message-ID: <bug-57521-4-WoV0cOJF99@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-57521-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57521

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's if-conversion (we do not vectorize anything here).  The predicates
are inserted correctly but the wrong ones are being used for the
predication.  That is because the predecessor edge we chose in
find_phi_replacement_condition is not fallthru and thus the predicate
we chose is bogus.  It seems to assume that critical edges are split.

I have a patch.


  parent reply	other threads:[~2013-06-24 13:48 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-04  0:47 [Bug tree-optimization/57521] New: " dhazeghi at yahoo dot com
2013-06-04  5:33 ` [Bug tree-optimization/57521] [4.7/4.8/4.9 Regression] " jakub at gcc dot gnu.org
2013-06-04 12:19 ` rguenth at gcc dot gnu.org
2013-06-24 13:48 ` rguenth at gcc dot gnu.org [this message]
2013-08-27 10:12 ` [Bug tree-optimization/57521] [4.7/4.8 " rguenth at gcc dot gnu.org
2013-09-09  9:51 ` rguenth at gcc dot gnu.org
2013-10-25 10:30 ` [Bug tree-optimization/57521] [4.7 " rguenth at gcc dot gnu.org
2014-03-18  8:47 ` rguenth at gcc dot gnu.org
2014-03-18  8:47 ` rguenth at gcc dot gnu.org

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