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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/96715] Failure to optimize copysign of variable by negated variable Date: Tue, 25 Aug 2020 05:22:04 +0000 [thread overview] Message-ID: <bug-96715-4-sJ9EMCDRdA@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-96715-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96715 --- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>: https://gcc.gnu.org/g:bb5e895245ebef488b63efc239f64488aef65cf1 commit r11-2832-gbb5e895245ebef488b63efc239f64488aef65cf1 Author: Jakub Jelinek <jakub@redhat.com> Date: Tue Aug 25 07:21:26 2020 +0200 match.pd: Simplify copysign (x, -x) to -x [PR96715] The following patch implements an optimization suggested in the PR, copysign(x,-x) can be optimized into -x (even without -ffast-math, should work fine even for signed zeros and infinities or nans). 2020-08-25 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/96715 * match.pd (copysign(x,-x) -> -x): New simplification. * gcc.dg/tree-ssa/copy-sign-3.c: New test.
next prev parent reply other threads:[~2020-08-25 5:22 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-08-19 20:31 [Bug tree-optimization/96715] New: " gabravier at gmail dot com 2020-08-24 14:13 ` [Bug tree-optimization/96715] " jakub at gcc dot gnu.org 2020-08-25 5:22 ` cvs-commit at gcc dot gnu.org [this message] 2020-08-25 11:14 ` rguenth at gcc dot gnu.org
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