* dwarf2out.c (dwarf2out_vms_debug_main_pointer): New function.
	* dwarf2out.h (dwarf2out_vms_debug_main_pointer): Declare new function.
	* config/ia64/ia64-protos.h (ia64_start_function): Declare.
	* config/ia64/sysv4.h (ASM_DECLARE_FUNCTION_NAME): Move contents
	to ia64_start_function. Invoke it.
	* config/ia64/ia64.c (ia64_start_function): Call new function
	dwarf2out_vms_debug_main_pointer.

From-SVN: r161402