PR tree-optimization/84648
	* tree-ssa-loop-niter.c (adjust_cond_for_loop_until_wrap): New.
	(number_of_iterations_cond): Adjust exit cond for loop-until-wrap case
	by calling adjust_cond_for_loop_until_wrap.

	gcc/testsuite
	* gcc.dg/tree-ssa/pr84648.c: New test.
	* gcc.dg/pr68317.c: Add warning check on overflow.

From-SVN: r266171