* ipa-inline-analysis.c (simple_edge_hints): Fix check for
	cross-module inlining.
	* cgraph.h (cgraph_node): Add flag merged.
	* ipa-icf.c (sem_function::merge): Maintain it.

	* lto-symtab.c (lto_cgraph_replace_node): Maintain merged flag.

From-SVN: r220372