re PR ipa/64686 (ICE: in edge_badness, at ipa-inline.c:912 during Firefox LTO build with enabled checking)

	PR ipa/64686
	* ipa-inline.c (inline_small_functions): Fix ordering issue between
	speculation resolution and key updates.
	* g++.dg/torture/pr64686.C: New testcase.

From-SVN: r220429