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From: "amacleod at redhat dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/108360] [13 Regression] Dead Code Elimination Regression at -Os since r13-2048-g418b71c0d535bf Date: Tue, 10 Jan 2023 19:28:08 +0000 [thread overview] Message-ID: <bug-108360-4-1zFbJN2BY3@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-108360-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108360 --- Comment #6 from Andrew Macleod <amacleod at redhat dot com> --- and VRP1 turned that if (_21 < 0) into if (_21 == -1) So yes, that was a correct transformation in FRE3, but the side effect is we lose the ability to look back and determine better ranges for _6 and h_23 as _6 is no longer part of the branch
next prev parent reply other threads:[~2023-01-10 19:28 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-01-10 13:10 [Bug tree-optimization/108360] New: Dead Code Elimination Regression at -Os (trunk vs. 12.2.0) yann at ywg dot ch 2023-01-10 14:48 ` [Bug tree-optimization/108360] [13 Regression] Dead Code Elimination Regression at -Os since r13-2048-g418b71c0d535bf marxin at gcc dot gnu.org 2023-01-10 17:00 ` jakub at gcc dot gnu.org 2023-01-10 17:32 ` jakub at gcc dot gnu.org 2023-01-10 17:45 ` jakub at gcc dot gnu.org 2023-01-10 19:18 ` amacleod at redhat dot com 2023-01-10 19:26 ` amacleod at redhat dot com 2023-01-10 19:28 ` amacleod at redhat dot com [this message] 2023-03-27 11:37 ` rguenth at gcc dot gnu.org 2023-04-08 14:37 ` law at gcc dot gnu.org 2023-04-26 6:57 ` [Bug tree-optimization/108360] [13/14 " rguenth at gcc dot gnu.org 2023-07-27 9:25 ` rguenth at gcc dot gnu.org 2023-08-07 8:53 ` pinskia at gcc dot gnu.org 2023-08-09 1:25 ` pinskia at gcc dot gnu.org 2024-05-21 9:13 ` [Bug tree-optimization/108360] [13/14/15 " jakub at gcc dot gnu.org
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