* builtin-attrs.def (ATTR_NORETURN_NOTHROW_LEAF_COLD_LIST,
	ATTR_CONST_NORETURN_NOTHROW_LEAF_COLD_LIST,
	ATTR_TMPURE_NORETURN_NOTHROW_LEAF_COLD_LIST): New.
	* builtins.def (abort, trap, unreachable): Declare cold.
	* calls.c (flags_from_decl_or_type): Lookup ECF_COLD.
	* tree-core.h (ECF_COLD): New.
	* tree.c (set_call_expr_flags): Handle ECF_COLD.
	(build_common_builtin_nodes): Mark unreachable and abort as cold.

	* class.c (build_vtbl_initializer): Mark dvirt_fn as cold.
	* decl.c (cxx_init_decl_processing, push_throw_library_fn): Likewise.
	(excpet.c): Mark terminate as cold.

	* gcc.dg/predict-14.c: Avoid cold function detection.
	* gcc.target/i386/umod-3.c: Likewise.

From-SVN: r249070