public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
From: Richard Biener <rguenth@gcc.gnu.org>
To: gcc-cvs@gcc.gnu.org
Subject: [gcc r11-10168] middle-end/103193 - avoid canonicalizing <= and >= to == for floats
Date: Fri, 22 Jul 2022 11:21:53 +0000 (GMT)	[thread overview]
Message-ID: <20220722112153.3EE06383469E@sourceware.org> (raw)

https://gcc.gnu.org/g:e2b97d6883a72b0c51dd0455acea43e21b5537d9

commit r11-10168-ge2b97d6883a72b0c51dd0455acea43e21b5537d9
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Nov 15 12:13:40 2021 +0100

    middle-end/103193 - avoid canonicalizing <= and >= to == for floats
    
    This avoids doing aforementioned canoncalization when -ftrapping-math
    is in effect and we honor NaNs.
    
    2021-11-15  Richard Biener  <rguenther@suse.de>
    
            PR middle-end/103193
            * match.pd: Avoid canonicalizing (le/ge @0 @0) to (eq @0 @0)
            with NaNs and -ftrapping-math.
    
    (cherry picked from commit d9ca2ca381e44a332703155d07b50b84aa21f80d)

Diff:
---
 gcc/match.pd | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gcc/match.pd b/gcc/match.pd
index e89601c0c14..8126f90ee75 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -4114,7 +4114,10 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
   (if (! FLOAT_TYPE_P (TREE_TYPE (@0))
        || ! HONOR_NANS (@0))
    { constant_boolean_node (true, type); }
-   (if (cmp != EQ_EXPR)
+   (if (cmp != EQ_EXPR
+	/* With -ftrapping-math conversion to EQ loses an exception.  */
+	&& (! FLOAT_TYPE_P (TREE_TYPE (@0))
+	    || ! flag_trapping_math))
     (eq @0 @0)))))
 (for cmp (ne gt lt)
  (simplify


                 reply	other threads:[~2022-07-22 11:21 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

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=20220722112153.3EE06383469E@sourceware.org \
    --to=rguenth@gcc.gnu.org \
    --cc=gcc-cvs@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).