MATCH: Simplify `min(a, b) op max(a, b)` to `a op b` [PR109401]

This patch simplify `min(a,b) op max(a,b)` to `a op b`. This optimization
will work for all the binary commutative operations. So, the `op` here can
be one of {plus, mult, bit_and, bit_xor, bit_ior, eq, ne, min, max}.

	PR tree-optimization/109401

gcc/ChangeLog:

	* match.pd (min(a,b) op max(a,b) -> a op b): New pattern.

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-ssa/pr109401.c: New test.
	* gcc.dg/tree-ssa/pr109401-1.c: New test.

Signed-off-by: Eikansh Gupta <quic_eikagupt@quicinc.com>