tree-vect-patterns: Fix up ICE in upper_bound [PR109115]

tree-vect-patterns: Fix up ICE in upper_bound [PR109115]

As mentioned in the PR, range_of_expr returns false if the type
of the expression isn't suitable for corresponding range type,
but doesn't if the range is undefined for other reasons.  Still,
lower/upper_bound is defined only for ranges which actually have
at least one pair of subranges, VR_UNDEFINED range doesn't have it.

2023-03-14  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/109115
	* tree-vect-patterns.cc (vect_recog_divmod_pattern): Don't use
	r.upper_bound () on r.undefined_p () range.

	* gcc.dg/pr109115.c: New test.