public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "tnfchris at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/103253] [12 Regression] ICE: Segmentation fault (in convert_mult_to_fma or in vect_recog_mask_conversion_pattern) since r12-5129-g8ed62c929c7c4462
Date: Tue, 16 Nov 2021 09:39:11 +0000	[thread overview]
Message-ID: <bug-103253-4-HWtq9rIYjd@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-103253-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103253

--- Comment #7 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
> .COND_MUL might raise an exception and DCE removes unused LHS of calls.  Looks like FMA analysis doesn't like internal fns w/o a LHS?

That makes sense, it looks like it needs the LHS to find the uses to see if
it's an ADD.  So likely `convert_mult_to_fma` should return false if there's no
LHS as there are no uses then and it can't be an FMA.

  parent reply	other threads:[~2021-11-16  9:39 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-15 17:05 [Bug tree-optimization/103253] New: [12 Regression] ICE: Segmentation fault (in convert_mult_to_fma) asolokha at gmx dot com
2021-11-15 17:21 ` [Bug tree-optimization/103253] [12 Regression] ICE: Segmentation fault (in convert_mult_to_fma or in vect_recog_mask_conversion_pattern) asolokha at gmx dot com
2021-11-16  8:16 ` [Bug tree-optimization/103253] [12 Regression] ICE: Segmentation fault (in convert_mult_to_fma or in vect_recog_mask_conversion_pattern) since r12-5129-g8ed62c929c7c4462 marxin at gcc dot gnu.org
2021-11-16  8:27 ` asolokha at gmx dot com
2021-11-16  8:42 ` tnfchris at gcc dot gnu.org
2021-11-16  9:02 ` tnfchris at gcc dot gnu.org
2021-11-16  9:32 ` rguenth at gcc dot gnu.org
2021-11-16  9:39 ` tnfchris at gcc dot gnu.org [this message]
2021-11-16  9:44 ` rguenther at suse dot de
2021-11-16 10:12 ` tnfchris at gcc dot gnu.org
2021-11-16 10:29 ` rguenther at suse dot de
2021-11-18 11:24 ` cvs-commit at gcc dot gnu.org
2021-11-18 11:26 ` tnfchris at gcc dot gnu.org
2021-12-13  8:22 ` [Bug tree-optimization/103253] Unused COND_MUL isn't removed by DCE even with -fno-trapping-math tnfchris at gcc dot gnu.org
2022-05-06  8:31 ` jakub at gcc dot gnu.org
2023-05-08 12:23 ` rguenth 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-103253-4-HWtq9rIYjd@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: link
Be 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).