stmt.c (same_case_target_p): New function to determine whether two case labels branch to the same target.


	* stmt.c (same_case_target_p): New function to determine whether
	two case labels branch to the same target.  Split out from...
	(group_case_nodes): ... here.  Use same_case_target_p instead.
	(strip_default_case_nodes): Remove explicit case nodes
	that branch to the default destination.
	(expand_end_case_type): Call strip_default_case_nodes after
	group_case_nodes, to simplify the case-list before we count it.
	Only generate table_label RTX when actually needed.  Try to share
	thiscase->exit_label and thiscase->data.case_stmt.default_label
	when a switch has no explicit default case.  Simplify test for
	constant index.

From-SVN: r61570