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.