public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/44141] Redundant loads and stores generated for AMD bdver1 target Date: Wed, 28 Mar 2012 08:01:00 -0000 [thread overview] Message-ID: <bug-44141-4-4ZuqWA0ry7@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-44141-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44141 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-03-28 07:47:58 UTC --- Having a vector mode changing subreg on the LHS of an instruction is a very common issue in the i386 backend, and unfortunately e.g. means that lots of insns can't be combined or simplified. I wonder if the expansion sometimes shouldn't use a non-subregged temporary as lhs and add a move from subreg of the temporary to the desired destination. BTW, if with TARGET_SSE_PACKED_SINGLE_INSN_OPTIMAL ps is more desirable than pd for movs, then perhaps it would be better to add a mode attr similar to ssemodesuffix, which would emit pd or ps for V2DFmode depending on TARGET_SSE_PACKED_SINGLE_INSN_OPTIMAL (see e.g. i128 mode attr).
next prev parent reply other threads:[~2012-03-28 7:48 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <bug-44141-4@http.gcc.gnu.org/bugzilla/> 2012-02-22 13:21 ` [Bug target/44141] " xiaoyuanbo at yeah dot net 2012-03-22 13:24 ` venkataramanan.kumar at amd dot com 2012-03-22 13:26 ` venkataramanan.kumar at amd dot com 2012-03-22 13:29 ` venkataramanan.kumar at amd dot com 2012-03-22 13:56 ` ubizjak at gmail dot com 2012-03-27 10:52 ` venkataramanan.kumar at amd dot com 2012-03-27 11:27 ` venkataramanan.kumar at amd dot com 2012-03-27 17:05 ` [Bug rtl-optimization/44141] " ubizjak at gmail dot com 2012-03-28 3:23 ` venkataramanan.kumar at amd dot com 2012-03-28 7:08 ` ubizjak at gmail dot com 2012-03-28 8:01 ` jakub at gcc dot gnu.org [this message] 2012-03-28 10:42 ` venkataramanan.kumar at amd dot com 2012-03-28 10:53 ` jakub at gcc dot gnu.org 2012-04-01 7:55 ` venkataramanan.kumar at amd dot com 2012-05-07 17:28 ` uweigand at gcc dot gnu.org 2012-05-08 10:28 ` [Bug target/44141] " rguenth at gcc dot gnu.org 2012-05-08 10:36 ` ubizjak at gmail dot com 2012-05-09 17:04 ` ubizjak at gmail dot com 2012-05-09 18:37 ` uros at gcc dot gnu.org 2012-05-09 20:42 ` 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-44141-4-4ZuqWA0ry7@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).