Make inliner more careful about profile inconsistencies

Make inliner more careful about profile inconsistencies

This patch makes inliner to not subtract inlined function profile from the
offline copy in cases where profile is clearly not consistent.  As a result we
do not drop the offline version to likely never executed profile.  This helps
in cases the profile got lost, i.e. by comdat function merging and also for
auto-fdo.

gcc/ChangeLog:

	* ipa-inline-transform.cc (clone_inlined_nodes): Add KEEP_OFFLINE_COPY
	parameter.
	(inline_call): Sanity check profile and if it is clearly broken do
	not subtract profile from original function.
	* ipa-inline.cc (recursive_inlining): Update.
	* ipa-inline.h (clone_inlined_nodes): Update.