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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/113265] [11/12/13/14 Regression] Missed optimization for redundancy computation elimination may be due to constant propagation about 0 too late Date: Tue, 09 Jan 2024 23:01:52 +0000 [thread overview] Message-ID: <bug-113265-4-JBG6CcU1Ln@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-113265-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113265 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|unassigned at gcc dot gnu.org |pinskia at gcc dot gnu.org Status|NEW |ASSIGNED --- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Started with r8-4394-g81bd903a6aa903 which added the `-(a - b)` -> `b - a` simplification to match. Anyways I am going to fix this for GCC 15. Note /* (A - B) == 0 ? (A - B) : (B - A) same as (B - A) */ Could be represented via: @0 == 0 ? @0 : (maybe_neg @1) if (expr_is_negative (@0, @1)) ... Too. This would be merged into: /* A == 0 ? A : -A same as -A */ even.
next prev parent reply other threads:[~2024-01-09 23:01 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-01-08 8:25 [Bug tree-optimization/113265] New: [Regression] " 652023330028 at smail dot nju.edu.cn 2024-01-09 8:06 ` [Bug tree-optimization/113265] " rguenth at gcc dot gnu.org 2024-01-09 8:16 ` rguenth at gcc dot gnu.org 2024-01-09 8:43 ` pinskia at gcc dot gnu.org 2024-01-09 22:55 ` [Bug tree-optimization/113265] [11/12/13/14 Regression] " pinskia at gcc dot gnu.org 2024-01-09 23:01 ` pinskia at gcc dot gnu.org [this message] 2024-03-07 20:52 ` law at gcc dot gnu.org 2024-05-26 5:43 ` [Bug tree-optimization/113265] [11/12/13/14/15 " pinskia at gcc dot gnu.org 2024-05-26 5:44 ` pinskia at gcc dot gnu.org
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