public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/63271] Should commute arithmetic with vector load Date: Tue, 16 Sep 2014 09:06:00 -0000 [thread overview] Message-ID: <bug-63271-4-cZGlY0LUWx@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-63271-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63271 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2014-09-16 Blocks| |53947 Ever confirmed|0 |1 --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- basic-block SLP misses treating a vector constructor as source to search for an SLP opportunity. And yes, it has issues with non-matching SLPs if adds of zero / multiplications of one could be inserted to make the SLP match. Both are missed optimization opportunities there. The SLP vectorizer also requires loads to end the SLP chain which isn't necessary either. We may have duplicate bugreports about each of the three issues (and they should be addressed separately with separate testcases).
next prev parent reply other threads:[~2014-09-16 9:06 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <bug-63271-4@http.gcc.gnu.org/bugzilla/> 2014-09-15 20:04 ` glisse at gcc dot gnu.org 2014-09-16 9:06 ` rguenth at gcc dot gnu.org [this message] 2021-08-15 22:34 ` pinskia at gcc dot gnu.org
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=bug-63271-4-cZGlY0LUWx@http.gcc.gnu.org/bugzilla/ \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).