ipa: Prevent materialization of clones with removed bodies (PR 92109)

ipa: Prevent materialization of clones with removed bodies (PR 92109)

2019-11-25  Martin Jambor  <mjambor@suse.cz>

	PR ipa/92109
	* cgraph.h (cgraph_node::remove_from_clone_tree): Declare.
	* cgraphclones.c (cgraph_node::remove_from_clone_tree): New method.
	(cgraph_materialize_clone): Move removel from clone tree to the
	the new method and use it instead.
	* ipa.c (symbol_table::remove_unreachable_nodes): When removing
	bodies of clones, also remove it from the clone tree.

From-SVN: r278670