* alias.c (alias_set_entry_d): Add is_pointer and has_pointer.
	(alias_stats): Add num_universal.
	(alias_set_subset_of): Special case pointers; be ready for NULL
	children.
	(alias_sets_conflict_p): Special case pointers; be ready for NULL
	children.
	(init_alias_set_entry): Break out from ...
	(record_alias_subset): ... here; propagate new fields;
	allocate children only when really needed.
	(get_alias_set): Do less generous pointer globbing.
	(dump_alias_stats_in_alias_c): Update statistics.
	* gcc.dg/alias-8.c: Do not xfail.
	* gcc.dg/pr62167.c: Prevent FRE.
	* gcc.dg/alias-14.c: New testcase.

From-SVN: r223883