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