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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/109829] Optimizing __builtin_signbit(x) ? -x : x or abs for FP
Date: Sun, 14 May 2023 23:08:31 +0000	[thread overview]
Message-ID: <bug-109829-4-ZFnEVJpKFj@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-109829-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109829

--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:82502b5c3463bde98d4b7ffb9ecef9b123799ed1

commit r14-813-g82502b5c3463bde98d4b7ffb9ecef9b123799ed1
Author: Andrew Pinski <apinski@marvell.com>
Date:   Sat May 13 22:25:21 2023 +0000

    MATCH: Add pattern for `signbit(x) ? x : -x` into abs (and swapped)

    This adds a simple pattern to match.pd for `signbit(x) ? x : -x`
    into abs<x>. This can be done for all types even ones that honor
    signed zeros and NaNs because both signbit and - are considered
    only looking at/touching the sign bit of those types and does
    not trap either.

    OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

            PR tree-optimization/109829

    gcc/ChangeLog:

            * match.pd: Add pattern for `signbit(x) !=/== 0 ? x : -x`.

    gcc/testsuite/ChangeLog:

            * gcc.dg/tree-ssa/abs-3.c: New test.
            * gcc.dg/tree-ssa/abs-4.c: New test.

  parent reply	other threads:[~2023-05-14 23:08 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-12 13:23 [Bug tree-optimization/109829] New: " antoshkka at gmail dot com
2023-05-12 18:16 ` [Bug tree-optimization/109829] " pinskia at gcc dot gnu.org
2023-05-12 19:25 ` pinskia at gcc dot gnu.org
2023-05-12 19:34 ` pinskia at gcc dot gnu.org
2023-05-12 20:02 ` jakub at gcc dot gnu.org
2023-05-12 20:03 ` jakub at gcc dot gnu.org
2023-05-12 20:18 ` pinskia at gcc dot gnu.org
2023-05-13 15:53 ` pinskia at gcc dot gnu.org
2023-05-13 22:29 ` pinskia at gcc dot gnu.org
2023-05-14  4:04 ` pinskia at gcc dot gnu.org
2023-05-14 23:08 ` cvs-commit at gcc dot gnu.org [this message]
2023-05-14 23:09 ` pinskia at gcc dot gnu.org

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