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From: "vincenzo.innocente at cern dot ch" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/53785] coalescing multiple static instances in function scope Date: Thu, 28 Jun 2012 04:43:00 -0000 [thread overview] Message-ID: <bug-53785-4-rTB6ZaLdh7@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-53785-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53785 --- Comment #2 from vincenzo Innocente <vincenzo.innocente at cern dot ch> 2012-06-28 04:43:27 UTC --- I think that no one can rely on the way statics are initialized to tune side effects. The only things to guarantee are that is guarded and, I think, that the order is preserved (because of possible side effects). in case getId is inlined even the order can be optimized in my opinion... Now one can have race conditions, so getId could actually be called by different threads in a unpredictable way. With a single gard it will become a unique critical section (or a sort of transactional memory block). Maybe experts in initialization in multi-threaded environments shall comment further...
next prev parent reply other threads:[~2012-06-28 4:43 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-06-27 6:49 [Bug rtl-optimization/53785] New: " vincenzo.innocente at cern dot ch 2012-06-27 6:59 ` [Bug rtl-optimization/53785] " pinskia at gcc dot gnu.org 2012-06-28 4:43 ` vincenzo.innocente at cern dot ch [this message] 2024-03-17 0:02 ` [Bug c++/53785] " pinskia at gcc dot gnu.org 2024-03-17 0:03 ` pinskia at gcc dot gnu.org
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