2016-12-14  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
	    Jakub Jelinek  <jakub@redhat.com>

	* tree-ssa-strlen.c (fold_strstr_to_memcmp): New function.
	(strlen_optimize_stmt): Call fold_strstr_to_memcmp.

testsuite/
	* gcc.dg/strlenopt-30.c: New test-case.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

From-SVN: r243633