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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 target/36241] Executable compiled with -m64 almost three times faster than the one compiled with -m32 on Core2Duo Date: Thu, 15 May 2008 09:07:00 -0000 [thread overview] Message-ID: <20080515090621.7192.qmail@sourceware.org> (raw) In-Reply-To: <bug-36241-12313@http.gcc.gnu.org/bugzilla/> ------- Comment #1 from rguenth at gcc dot gnu dot org 2008-05-15 09:06 ------- First without -ffast-math the phiopt doesn't recognize the MAX_EXPR (see PR36190), second t.f90:24: note: not vectorized: number of iterations cannot be computed. t.f90:24: note: bad loop form. which is the problem for both testcases (so I don't see either one being vectorized). But I can confirm that -m32 is more than two times slower (also with SSE math), likely due to the use of integer(8). -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2008-05-15 09:06:21 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36241
next prev parent reply other threads:[~2008-05-15 9:07 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2008-05-15 8:05 [Bug target/36241] New: " dominiq at lps dot ens dot fr 2008-05-15 9:07 ` rguenth at gcc dot gnu dot org [this message] 2008-05-15 9:22 ` [Bug target/36241] " ubizjak at gmail dot com 2009-06-15 18:32 ` fxcoudert at gcc dot gnu dot org 2009-06-15 18:44 ` kargl at gcc dot gnu dot org 2009-06-16 20:30 ` dominiq at lps dot ens dot fr 2009-06-16 21:02 ` kargl at gcc dot gnu dot org 2009-06-17 9:19 ` ubizjak at gmail dot com 2009-06-29 8:47 ` ubizjak at gmail dot com
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