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From: "dgohman at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/44413] inefficient code for std::string::compare on x86-64 Date: Tue, 08 Jun 2010 14:54:00 -0000 [thread overview] Message-ID: <20100608145439.11862.qmail@sourceware.org> (raw) In-Reply-To: <bug-44413-19284@http.gcc.gnu.org/bugzilla/> ------- Comment #3 from dgohman at gmail dot com 2010-06-08 14:54 ------- Callers of compare are already exposed to __builtin_memcmp result values (with default traits) which vary depending on the target and compiler flags. And since _S_compare is only used as a tie-breaker after the memcmp, it's hard to imagine any code innocently relying on it returning a particular value. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44413
next prev parent reply other threads:[~2010-06-08 14:54 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-06-04 12:15 [Bug libstdc++/44413] New: " dgohman at gmail dot com 2010-06-04 16:52 ` [Bug libstdc++/44413] " redi at gcc dot gnu dot org 2010-06-07 14:52 ` paolo dot carlini at oracle dot com 2010-06-08 14:54 ` dgohman at gmail dot com [this message] 2010-06-08 15:09 ` paolo dot carlini at oracle dot com 2010-06-08 16:00 ` paolo dot carlini at oracle dot com 2010-06-09 9:16 ` paolo at gcc dot gnu dot org 2010-06-09 14:03 ` paolo at gcc dot gnu dot org 2010-06-09 15:14 ` paolo dot carlini at oracle dot com 2010-06-10 0:27 ` paolo dot carlini at oracle dot com
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