Remove cgraph_node::summary_uid and make cgraph_node::uid really unique.

Remove cgraph_node::summary_uid and make cgraph_node::uid really unique.

2018-06-08  Martin Liska  <mliska@suse.cz>

	* cgraph.c (cgraph_node::remove): Do not recycle uid.
	* cgraph.h (symbol_table::release_symbol): Do not pass uid.
	(symbol_table::allocate_cgraph_symbol): Do not set uid.
	* passes.c (uid_hash_t): Record removed_nodes by their uids.
	(remove_cgraph_node_from_order): Use the removed_nodes set.
	(do_per_function_toporder): Likwise.
	* symbol-summary.h (symtab_insertion): Use cgraph_node::uid
	instead of summary_uid.
	(symtab_removal): Likewise.
	(symtab_duplication): Likewise.
2018-06-08  Martin Liska  <mliska@suse.cz>

	* lto-partition.c (lto_balanced_map): Use cgraph_node::uid
	instead of summary_uid.

From-SVN: r261315