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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/57558] Issue with number of iterations calculation Date: Mon, 10 Jun 2013 08:48:00 -0000 [thread overview] Message-ID: <bug-57558-4-d12yeBGI3p@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-57558-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57558 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Blocks| |53947 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- That's because the first variant can loop infinitely for n == ULONG_MAX and that "infinite" cannot be represented using new induction variable as the vectorizer wants to. Well, not easily at least.
next prev parent reply other threads:[~2013-06-10 8:48 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-06-07 14:45 [Bug tree-optimization/57558] New: " ysrumyan at gmail dot com 2013-06-10 8:48 ` rguenth at gcc dot gnu.org [this message] 2013-10-04 11:09 ` [Bug tree-optimization/57558] " a.sinyavin at samsung dot com 2015-05-06 15:16 ` alalaw01 at gcc dot gnu.org 2015-09-25 13:49 ` [Bug tree-optimization/57558] Loop not vectorized if iteration count could be infinite alalaw01 at gcc dot gnu.org
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