dwarf2cfi.c (struct dw_trace_info): Add args_size_defined_for_eh.

dwarf2cfi.c (struct dw_trace_info): Add args_size_defined_for_eh.

	* dwarf2cfi.c (struct dw_trace_info): Add args_size_defined_for_eh.
	(notice_args_size): Set it in the current trace if no insn that can
	throw internally has been seen yet.
	(connect_traces): When connecting args_size between traces, allow the
	incoming values not to match if there is an insn setting it before the
	first insn that can throw internally; in that case, force the creation
	of a CFI note on this latter insn.

From-SVN: r265142