re PR ipa/64801 (kernel build failure due to ICF)

	PR ipa/64801
	* gcc.dg/tree-ssa/pr64801.c: New testcase.
	* cgraphunit.c (init_lowered_empty_function): Add CoUNT parameter;
	make sane BB profile.
	(cgraph_node::expand_thunk): Make sane BB profile.
	(cgraph_node::create_wrapper): Do not set call_stmt_cannot_inline_p.
	* cgraph.h (init_lowered_empty_function): Update prototype.
	* config/i386/i386.c (make_resolver_func): Update call.
	* predict.c (gate): Disable branch prediction pass if
	profile is already there.

From-SVN: r220230