2017-01-23  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/79196
	* tree-ssa-strlen.c (fold_strstr_to_memcmp): Rename to ...
	(fold_strstr_to_strncmp): ... this.  Fold the pattern to strncmp
	instead of memcmp.
	(strlen_optimize_stmt): Call the renamed function.
2017-01-23  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/79196
	* gcc.dg/asan/pr79196.c: New test.
	* gcc.dg/strlenopt-30.c: Update scanned pattern.

From-SVN: r244812