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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/113189] New: `(-X * Y) * -X` can be optimized to `(X * Y) * X` Date: Mon, 01 Jan 2024 09:39:38 +0000 [thread overview] Message-ID: <bug-113189-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113189 Bug ID: 113189 Summary: `(-X * Y) * -X` can be optimized to `(X * Y) * X` Product: gcc Version: 14.0 Status: UNCONFIRMED Keywords: missed-optimization, TREE Severity: enhancement Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: pinskia at gcc dot gnu.org Target Milestone: --- Take: ``` int f(int X, int Y) { return (-X * Y) * -X; } double fd(double X, double Y) { return (-X * Y) * -X; } int g(int X, int Y) { return ((-X) << Y) * -X; } ``` The negative should be optimized away but currently is only optimized at the RTL level.
next reply other threads:[~2024-01-01 9:39 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-01-01 9:39 pinskia at gcc dot gnu.org [this message] 2024-01-01 9:43 ` [Bug tree-optimization/113189] " pinskia at gcc dot gnu.org 2024-01-01 13:31 ` jsm28 at gcc dot gnu.org
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