ipa-cp: Avoid ICEs when looking at expanded thunks and unoptimized functions

ipa-cp: Avoid ICEs when looking at expanded thunks and unoptimized functions

2019-11-29  Martin Jambor  <mjambor@suse.cz>

	PR ipa/92476
	* ipa-cp.c (set_single_call_flag): Set node_calling_single_call in
	the summary only if the summary exists.
	(find_more_scalar_values_for_callers_subset): Check node_dead in
	the summary only if the summary exists.
	(ipcp_store_bits_results): Ignore nodes without lattices.
	(ipcp_store_vr_results): Likewise.
	* cgraphclones.c: Include ipa-fnsummary.h and ipa-prop.h and the
	header files required by them.
	(cgraph_node::expand_all_artificial_thunks): Analyze expanded thunks.

From-SVN: r278841