https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83444
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Tue Dec 19 18:10:04 2017 New Revision: 255835 URL: https://gcc.gnu.org/viewcvs?rev=255835&root=gcc&view=rev Log: PR tree-optimization/83444 * tree-ssa-strlen.c (strlen_check_and_optimize_stmt): For the character load case, if get_stridx on MEM_REF's operand doesn't look usable, retry with get_addr_stridx. * gcc.dg/strlenopt-38.c: New test. Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/testsuite/gcc.dg/strlenopt-38.c trunk/gcc/tree-ssa-strlen.c