Fix afdo profiles for functions that was not early-inlined

This patch should finish the oflining infrastructure by offlining
(prior AFDO annotation) all inline function instances that was not
early inlined.  This is mostly the case of recursive inlining or when
-fno-auto-profile-inlining is used which sould now produce comparable
code.

I also cleaned up offlining of self-recursive functions which now
happens through the worklist and reduces problem with recursive ivocation
of the funciton merging modifying datastructures at unexpected places.

gcc/ChangeLog:

	* auto-profile.cc (function_instance::set_name,
	function_instance::set_realized, function_instnace::realized_p,
	function_instance::set_in_worklist,
	function_instance::clear_in_worklist,
	function_instance::in_worklist_p): New member functions.
	(function_instance::in_worklist, function_instance::realized_):
	new.
	(get_relative_location_for_locus): Break out from ....
	(get_relative_location_for_stmt): ... here.
	(function_instance::~function_instance): Sanity check that
	removed function is not in worklist.
	(function_instance::merge): Do not offline realized instances.
	(function_instance::offline): Make private; add duplicate functions
	to worklist rather then merging immediately.
	(function_instance::offline_if_in_set):  Cleanup.
	(function_instance::remove_external_functions): Likewise.
	(function_instance::offline_if_not_realized): New member function.
	(autofdo_source_profile::offline_external_functions): Handle delayed
	functions.
	(autofdo_source_profile::offline_unrealized_inlines): New member function.
	(walk_block): New function.
	(mark_realized_functions): New function.
	(afdo_annotate_cfg): Fix dump.
	(auto_profile): Mark realized functions and offline rest; do not compute
	fn summary.

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-prof/afdo-crossmodule-1.c: Update template.

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