MATCH: Extend min_value/max_value to pointer types

MATCH: Extend min_value/max_value to pointer types

Since we already had the infrastructure to optimize
`(x == 0) && (x > y)` to false for integer types,
this extends the same to pointer types as indirectly
requested by PR 96695.

OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

gcc/ChangeLog:

	PR tree-optimization/96695
	* match.pd (min_value, max_value): Extend to
	pointer types too.

gcc/testsuite/ChangeLog:

	PR tree-optimization/96695
	* gcc.dg/pr96695-1.c: New test.
	* gcc.dg/pr96695-10.c: New test.
	* gcc.dg/pr96695-11.c: New test.
	* gcc.dg/pr96695-12.c: New test.
	* gcc.dg/pr96695-2.c: New test.
	* gcc.dg/pr96695-3.c: New test.
	* gcc.dg/pr96695-4.c: New test.
	* gcc.dg/pr96695-5.c: New test.
	* gcc.dg/pr96695-6.c: New test.
	* gcc.dg/pr96695-7.c: New test.
	* gcc.dg/pr96695-8.c: New test.
	* gcc.dg/pr96695-9.c: New test.