public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/109764] New: V2SI multiply high is not vectorized on x86_64 Date: Sun, 07 May 2023 16:21:37 +0000 [thread overview] Message-ID: <bug-109764-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109764 Bug ID: 109764 Summary: V2SI multiply high is not vectorized on x86_64 Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: ubizjak at gmail dot com Target Milestone: --- The folowing testcase: --cut here-- #define N 2 unsigned int ur[N], ua[N], ub[N]; void mulh (void) { int i; for (i = 0; i < N; i++) ur[i] = ((unsigned long) ua[i] * ub[i]) >> 32; } void mulh_slp (void) { ur[0] = ((unsigned long) ua[0] * ub[0]) >> 32; ur[1] = ((unsigned long) ua[1] * ub[1]) >> 32; } --cut here-- should vectorize on x86_64 with the patch I'm going to attach, and with -fno-vect-cost-model. The compiler however does not even consider "<s>mulv2si3_highpart" pattern.
next reply other threads:[~2023-05-07 16:21 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-05-07 16:21 ubizjak at gmail dot com [this message] 2023-05-07 16:23 ` [Bug tree-optimization/109764] " ubizjak at gmail dot com 2023-05-08 7:19 ` rguenth at gcc dot gnu.org 2023-05-08 8:09 ` ubizjak at gmail dot com
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-109764-4@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).