pa.c (legitimize_pic_address): Use UNSPEC_DLTIND14R to identify unspec used for loading address from DLT.

	* pa.c (legitimize_pic_address): Use UNSPEC_DLTIND14R to identify
	unspec used for loading address from DLT.
	* pa.md: Define constants for the uses of UNSPEC and UNSPEC_VOLATILE.
	Change all users of UNSPEC and UNSPEC_VOLATILE to use new constants.
	Don't use short code sequence when loading the address of a nonlocal
	label.
	(nonlocal_goto): New expander.
	(indirect_goto): New jump pattern for nonlocal gotos.
	(short_jump): Remove extra whitespace.
	(builtin_longjmp): Clobber memory and hard frame pointer.  Restore
	frame pointer via virtual_stack_vars_rtx when we have a nonlocal goto
	pattern.

From-SVN: r83003