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From: "irar at il dot ibm dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/37416] [4.4 Regression] Failure to return number of loop iterations Date: Sat, 22 Nov 2008 15:10:00 -0000 [thread overview] Message-ID: <20081122150848.31876.qmail@sourceware.org> (raw) In-Reply-To: <bug-37416-9531@http.gcc.gnu.org/bugzilla/> ------- Comment #2 from irar at il dot ibm dot com 2008-11-22 15:08 ------- (In reply to comment #1) > This bug is shamefully incomplete. There is no way anyone willing to give this > a look can know what to look for. > For example, a few things one would have to know before he/she can even begin > to consider whether/how to analyze the problem: > 1. What is the target where you see this? > 2. What compiler flags are you using? -O3 > 3. Where do you look for the number of iterations (which dump)? vectorizer's dump > 4. What "missed-optimization" does this cause (something not vectorized)? the loop is not vectorized because the number of iterations is unknown > Please read http://gcc.gnu.org/bugs.html#report before filing more bugs. -- irar at il dot ibm dot com changed: What |Removed |Added ---------------------------------------------------------------------------- GCC build triplet| |x86_64-suse-linux GCC host triplet| |x86_64-suse-linux GCC target triplet| |x86_64-suse-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37416
next prev parent reply other threads:[~2008-11-22 15:10 UTC|newest] Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2008-09-08 6:39 [Bug tree-optimization/37416] New: " irar at il dot ibm dot com 2008-09-13 12:07 ` [Bug tree-optimization/37416] [4.4 Regression] " rguenth at gcc dot gnu dot org 2008-10-22 3:08 ` mmitchel at gcc dot gnu dot org 2008-11-21 20:58 ` steven at gcc dot gnu dot org 2008-11-22 15:10 ` irar at il dot ibm dot com [this message] 2008-11-22 15:49 ` rguenth at gcc dot gnu dot org 2008-12-09 17:16 ` jakub at gcc dot gnu dot org 2008-12-09 20:38 ` jakub at gcc dot gnu dot org 2008-12-09 22:50 ` jakub at gcc dot gnu dot org 2008-12-10 10:50 ` jakub at gcc dot gnu dot org 2008-12-10 10:55 ` jakub at gcc dot gnu dot org
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