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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/114999] A few missing optimizations due to `a - b` and `b - a` not being detected as negatives of each other Date: Fri, 31 May 2024 21:46:10 +0000 [thread overview] Message-ID: <bug-114999-4-qIMDhzdY8M@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-114999-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114999 --- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> --- ``` float f(float a, float b, float x) { x = a - b; float t = 0; t = t - x; return t/x; } ``` ! HONOR_NANS (type) && ! HONOR_INFINITIES (type) ``` int f(int a, int b, int A) { A = ~A; int t = 0; t = t - A; return A != 0 ? A : t; } ``` Is not optimized at -O1 until phiopt3 .
prev parent reply other threads:[~2024-05-31 21:46 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-05-09 0:11 [Bug tree-optimization/114999] New: `a - b == b - a` -> `a == b` pinskia at gcc dot gnu.org 2024-05-09 0:11 ` [Bug tree-optimization/114999] " pinskia at gcc dot gnu.org 2024-05-09 0:16 ` [Bug tree-optimization/114999] A few missing optimizations due to `a - b` and `b - a` not being detected as negatives of each other pinskia at gcc dot gnu.org 2024-05-09 0:17 ` pinskia at gcc dot gnu.org 2024-05-09 0:33 ` pinskia at gcc dot gnu.org 2024-05-09 0:35 ` pinskia at gcc dot gnu.org 2024-05-25 2:55 ` pinskia at gcc dot gnu.org 2024-05-25 5:42 ` pinskia at gcc dot gnu.org 2024-05-31 21:29 ` pinskia at gcc dot gnu.org 2024-05-31 21:46 ` pinskia at gcc dot gnu.org [this message]
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