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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/107247] SLP reduction results fail to reduce to a single accumulator Date: Thu, 13 Oct 2022 14:30:47 +0000 [thread overview] Message-ID: <bug-107247-4-s5pwK5JQ3y@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-107247-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107247 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|ASSIGNED |RESOLVED --- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- This is now fixed for the cases not requiring permutations. One could think of a three-lane SLP reduction with three four component vectors being reduced by first "expanding" to four "three component" vectors, summing them and then extracting from the lower three lanes. Likewise for a six-lane SLP reduction which would get a more complex extraction of two-vector, six-lane pairs. Unless a compelling case comes along I don't consider these important.
next prev parent reply other threads:[~2022-10-13 14:30 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-10-13 12:37 [Bug tree-optimization/107247] New: " rguenth at gcc dot gnu.org 2022-10-13 12:59 ` [Bug tree-optimization/107247] " rguenth at gcc dot gnu.org 2022-10-13 14:28 ` cvs-commit at gcc dot gnu.org 2022-10-13 14:30 ` rguenth at gcc dot gnu.org [this message] 2023-12-12 3:17 ` pinskia at gcc dot gnu.org
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