* gimple-fold.c (gimple_fold_builtin_strlen): Use set_strlen_range
	rather than set_range_info.
	* tree-ssa-strlen.c (set_strlen_range): Extracted from
	maybe_set_strlen_range.  Handle potentially boundary crossing
	cases more conservatively.
	(maybe_set_strlen_range): Parts refactored into set_strlen_range.
	Call set_strlen_range.
	* tree-ssa-strlen.h (set_strlen_range): Add prototype.

	* gcc.dg/strlenopt-36.c: Update.
	* gcc.dg/strlenopt-45.c: Update.
	* gcc.c-torture/execute/strlen-5.c: New test.
	* gcc.c-torture/execute/strlen-6.c: New test.
	* gcc.c-torture/execute/strlen-7.c: New test.

Co-Authored-By: Jeff Law <law@redhat.com>

From-SVN: r267531