2010-03-17 Stan Shebs <stan@codesourcery.com>

2010-03-17 Stan Shebs  <stan@codesourcery.com>

	* ax-gdb.h (struct axs_value): New field optimized_out.
	(gen_trace_for_var): Add gdbarch argument.
	* ax-gdb.c (gen_trace_static_fields): New function.
	(gen_traced_pop): Call it, add gdbarch argument.
	(gen_trace_for_expr): Update call to it.
	(gen_trace_for_var): Ditto, and report optimized-out variables.
	(gen_struct_ref_recursive): Check for optimized-out value.
	(gen_struct_elt_for_reference): Ditto.
	(gen_static_field): Pass gdbarch instead of expression, assume
	optimization if field not found.
	(gen_var_ref): Set the optimized_out flag.
	(gen_expr): Error on optimized-out variable.
	* tracepoint.c (collect_symbol): Handle struct-valued vars as
	expressions, skip optimized-out variables with computed locations.
	* dwarf2loc.c (dwarf2_tracepoint_var_ref): Flag instead of
	erroring out if location expression missing.
	(loclist_tracepoint_var_ref): Don't error out here.