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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/109441] missed optimization when all elements of vector are known Date: Tue, 11 Apr 2023 13:17:52 +0000 [thread overview] Message-ID: <bug-109441-4-fMJJ8KmwHT@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-109441-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109441 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2023-04-11 Status|UNCONFIRMED |NEW Ever confirmed|0 |1 Version|unknown |13.0 CC| |rguenth at gcc dot gnu.org --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Well, it doesn't need std::vector for this, a C testcase with a large enough array (> 16 elements, the unroll limit) suffers from the same "problem". But IMHO it's academic, right? GCC only transforms loopy code like you suggest by complete peeling of the loop, it doesn't attempt to "simulate" IL (and if, then it would only up to some complexity limit).
next prev parent reply other threads:[~2023-04-11 13:17 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-04-06 18:31 [Bug tree-optimization/109441] New: " hiraditya at msn dot com 2023-04-06 18:36 ` [Bug tree-optimization/109441] " pinskia at gcc dot gnu.org 2023-04-06 18:40 ` hiraditya at msn dot com 2023-04-11 13:17 ` rguenth at gcc dot gnu.org [this message] 2023-05-17 17:23 ` hiraditya at msn dot com 2023-05-18 5:34 ` rguenth at gcc dot gnu.org
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