invoke.texi (-fipa-profile): Document.

invoke.texi (-fipa-profile): Document.

	* doc/invoke.texi (-fipa-profile): Document.
	* opts.c (decode_options): Enable ipa-profile at -O1.
	* timevar.def (TV_IPA_PROFILE): Define.
	* common.opt (fipa-profile): Add.
	* cgraph.c (cgraph_clone_node): Set local flag and clear vtable method flag
	for clones.
	(cgraph_propagate_frequency): Handle only local ones.
	* tree-pass.h (pass_ipa_profile): Declare.
	* ipa-profile.c (gate_profile): Use flag_ipa_profile.
	(pass_ipa_profile): Use TV_IPA_PROFILE.
	* ipa.c (ipa_profile): New function.
	(gate_ipa_profile): Likewise.
	(pass_ipa_profile): New global variable.
	* passes.c (pass_ipa_profile): New.

From-SVN: r158788