Fix verifier ICE on wrong comdat local flag [PR93347]

Fix verifier ICE on wrong comdat local flag [PR93347]

gcc/ChangeLog:

2020-03-20  Jan Hubicka  <hubicka@ucw.cz>

	PR ipa/93347
	* cgraph.c (symbol_table::create_edge): Update calls_comdat_local flag.
	(cgraph_edge::redirect_callee): Move here; likewise.
	(cgraph_node::remove_callees): Update calls_comdat_local flag.
	(cgraph_node::verify_node): Verify that calls_comdat_local flag match
	reality.
	(cgraph_node::check_calls_comdat_local_p): New member function.
	* cgraph.h (cgraph_node::check_calls_comdat_local_p): Declare.
	(cgraph_edge::redirect_callee): Move offline.
	* ipa-fnsummary.c (compute_fn_summary): Do not compute
	calls_comdat_local flag here.
	* ipa-inline-transform.c (inline_call): Fix updating of
	calls_comdat_local flag.
	* ipa-split.c (split_function): Use true instead of 1 to set the flag.
	* symtab.c (symtab_node::add_to_same_comdat_group): Update
	calls_comdat_local flag.

gcc/testsuite/ChangeLog:

2020-03-20  Jan Hubicka  <hubicka@ucw.cz>

	* g++.dg/torture/pr93347.C: New test.