split-paths: Move check for # of statements in join earlier

This moves the check for # of statements to copy in join to
be the first check. This check is the cheapest check so it
should be first. Plus add a print to the dump file since there
was none beforehand.

gcc/ChangeLog:

	* gimple-ssa-split-paths.cc (is_feasible_trace): Move
	check for # of statments in join earlier and add a
	debug print.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>