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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/95433] Failure to completely optimize simple compare after operations Date: Sat, 01 Aug 2020 07:38:01 +0000 [thread overview] Message-ID: <bug-95433-4-6fhd7BNERo@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-95433-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95433 --- Comment #5 from Marc Glisse <glisse at gcc dot gnu.org> --- Patch posted at https://gcc.gnu.org/pipermail/gcc-patches/2020-August/551154.html for the original testcase. Note that solving univariate polynomial equations *in the integers* (the rationals are not much harder) is actually rather simple, just enumerate the divisors of the constant term and evaluate the polynomial on each of them to check which ones are roots. If someone wants to implement that...
next prev parent reply other threads:[~2020-08-01 7:38 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-30 3:16 [Bug tree-optimization/95433] New: " gabravier at gmail dot com 2020-05-30 6:43 ` [Bug tree-optimization/95433] " glisse at gcc dot gnu.org 2020-06-02 6:58 ` rguenth at gcc dot gnu.org 2020-06-03 20:37 ` joseph at codesourcery dot com 2020-06-04 11:09 ` ebotcazou at gcc dot gnu.org 2020-08-01 7:38 ` glisse at gcc dot gnu.org [this message] 2020-08-04 15:35 ` cvs-commit at gcc dot gnu.org 2020-08-10 10:53 ` cvs-commit at gcc dot gnu.org 2021-09-04 23:39 ` pinskia at gcc dot gnu.org
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