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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/42694] Compiler could optimize pow (x, 0.75) into sqrt (x) * sqrt (sqrt (x)) Date: Tue, 26 Jan 2010 09:57:00 -0000 [thread overview] Message-ID: <20100126095730.15298.qmail@sourceware.org> (raw) In-Reply-To: <bug-42694-15150@http.gcc.gnu.org/bugzilla/> ------- Comment #4 from rguenth at gcc dot gnu dot org 2010-01-26 09:57 ------- Ugh, I don't like more switches. Instead I would say that using two sqrt calls instead of one pow call is always profitable if not optimizing for size and the target has an optab for sqrt. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42694
next prev parent reply other threads:[~2010-01-26 9:57 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-01-11 21:40 [Bug rtl-optimization/42694] New: " meissner at gcc dot gnu dot org 2010-01-11 21:42 ` [Bug rtl-optimization/42694] " meissner at gcc dot gnu dot org 2010-01-12 9:08 ` [Bug middle-end/42694] " rguenth at gcc dot gnu dot org 2010-01-26 0:40 ` meissner at gcc dot gnu dot org 2010-01-26 9:57 ` rguenth at gcc dot gnu dot org [this message] 2010-01-26 10:03 ` paolo dot carlini at oracle dot com 2010-04-14 15:02 ` meissner at gcc dot gnu dot org 2010-04-14 15:03 ` meissner at gcc dot gnu dot org [not found] <bug-42694-4@http.gcc.gnu.org/bugzilla/> 2010-12-07 17:42 ` meissner at gcc dot gnu.org 2010-12-08 16:34 ` meissner at gcc dot gnu.org
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