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From: "tim at klingt dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/41103] g++-4.3/4.4 generates wrong code on x86_64 Date: Tue, 18 Aug 2009 14:36:00 -0000 [thread overview] Message-ID: <20090818143609.7945.qmail@sourceware.org> (raw) In-Reply-To: <bug-41103-12873@http.gcc.gnu.org/bugzilla/> ------- Comment #5 from tim at klingt dot org 2009-08-18 14:36 ------- compiling with -fno-strict-aliasing doesn't do any difference. the error is actually related to some code, that does a pointer/tag compression, packing a pointer and an integer to a 64bit pointer [1] in order to deal with the lack of cmpxchg16b instructions on early x86_64 cpus. hth, tim [1] http://tim.klingt.org/git?p=boost_lockfree.git;a=blob;f=boost/lockfree/detail/tagged_ptr_ptrcompression.hpp -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41103
next prev parent reply other threads:[~2009-08-18 14:36 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2009-08-18 11:30 [Bug c++/41103] New: " tim at klingt dot org 2009-08-18 11:35 ` [Bug c++/41103] " tim at klingt dot org 2009-08-18 11:37 ` tim at klingt dot org 2009-08-18 11:50 ` tim at klingt dot org 2009-08-18 14:25 ` rguenth at gcc dot gnu dot org 2009-08-18 14:36 ` tim at klingt dot org [this message] [not found] <bug-41103-4@http.gcc.gnu.org/bugzilla/> 2011-10-19 0:17 ` paolo.carlini at oracle dot com 2011-10-19 7:52 ` rguenth at gcc dot gnu.org 2012-05-13 22:19 ` paolo.carlini at oracle dot com
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