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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/42145] Incorrect "may be used uninitialized warning" for a very specific test case Date: Tue, 19 Nov 2013 22:16:00 -0000 [thread overview] Message-ID: <bug-42145-4-WUa5Xsgr0k@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-42145-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42145 Jeffrey A. Law <law at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |law at redhat dot com --- Comment #5 from Jeffrey A. Law <law at redhat dot com> --- -Os disables jump threading except for very specific circumstances because the block duplication generally increases code size. As a result of restricting the optimizer, certain paths through the CFG which are unexecutable have to be left in the CFG which leads to the false positive.
next prev parent reply other threads:[~2013-11-19 22:16 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <bug-42145-4@http.gcc.gnu.org/bugzilla/> 2013-11-19 9:11 ` manu at gcc dot gnu.org 2013-11-19 22:16 ` law at redhat dot com [this message] 2013-11-19 22:19 ` law at redhat dot com 2013-11-19 22:23 ` law at redhat dot com 2013-11-19 22:30 ` law at redhat dot com 2013-11-20 0:42 ` law at redhat dot com 2013-11-20 1:13 ` law at redhat dot com
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