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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/64309] if (1 & (1 << n)) not simplified to if (n == 0) Date: Tue, 16 Dec 2014 18:29:00 -0000 [thread overview] Message-ID: <bug-64309-4-es4uSqiKDO@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-64309-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64309 --- Comment #14 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Author: mpolacek Date: Tue Dec 16 18:29:01 2014 New Revision: 218787 URL: https://gcc.gnu.org/viewcvs?rev=218787&root=gcc&view=rev Log: PR middle-end/64309 * match.pd: Add ((1 << A) & 1) != 0 -> A == 0 and ((1 << A) & 1) == 0 -> A != 0. * gcc.dg/pr64309.c: New test. Added: trunk/gcc/testsuite/gcc.dg/pr64309.c Modified: trunk/gcc/ChangeLog trunk/gcc/match.pd trunk/gcc/testsuite/ChangeLog
next prev parent reply other threads:[~2014-12-16 18:29 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-12-15 2:49 [Bug rtl-optimization/64309] New: " olegendo at gcc dot gnu.org 2014-12-15 11:45 ` [Bug middle-end/64309] " mpolacek at gcc dot gnu.org 2014-12-15 13:23 ` mpolacek at gcc dot gnu.org 2014-12-15 19:08 ` olegendo at gcc dot gnu.org 2014-12-15 19:22 ` mpolacek at gcc dot gnu.org 2014-12-15 20:19 ` glisse at gcc dot gnu.org 2014-12-15 20:41 ` olegendo at gcc dot gnu.org 2014-12-15 20:46 ` mpolacek at gcc dot gnu.org 2014-12-15 20:46 ` jakub at gcc dot gnu.org 2014-12-15 20:49 ` mpolacek at gcc dot gnu.org 2014-12-15 21:06 ` glisse at gcc dot gnu.org 2014-12-15 21:11 ` glisse at gcc dot gnu.org 2014-12-16 8:54 ` rguenther at suse dot de 2014-12-16 18:29 ` mpolacek at gcc dot gnu.org [this message] 2014-12-16 18:30 ` mpolacek at gcc dot gnu.org
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