https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82498
--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Sat Oct 14 18:47:14 2017 New Revision: 253760 URL: https://gcc.gnu.org/viewcvs?rev=253760&root=gcc&view=rev Log: PR middle-end/62263 PR middle-end/82498 * tree-ssa-forwprop.c (simplify_rotate): Allow def_arg1[N] to be any operand_equal_p operands. For & (B - 1) require B to be power of 2. Recognize (X << (Y & (B - 1))) | (X >> ((-Y) & (B - 1))) and similar patterns. * c-c++-common/rotate-5.c (f2): New function. Move old function to ... (f4): ... this. Use 127 instead of 128. (f3, f5, f6): New functions. (main): Test all f[1-6] functions, with both 0 and 1 as second arguments. * c-c++-common/rotate-6.c: New test. * c-c++-common/rotate-6a.c: New test. * c-c++-common/rotate-7.c: New test. * c-c++-common/rotate-7a.c: New test. * c-c++-common/rotate-8.c: New test. Added: trunk/gcc/testsuite/c-c++-common/rotate-6.c trunk/gcc/testsuite/c-c++-common/rotate-6a.c trunk/gcc/testsuite/c-c++-common/rotate-7.c trunk/gcc/testsuite/c-c++-common/rotate-7a.c trunk/gcc/testsuite/c-c++-common/rotate-8.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/testsuite/c-c++-common/rotate-5.c trunk/gcc/tree-ssa-forwprop.c
