* pa.c (reg_or_0_operand): Use CONST0_RTX instead of
	const0_rtx.
	(reg_or_0_or_nonsymb_mem_operand): New function.
	(emit_move_sequence): Copying CONST0_RTX into any
	register can be done directly.  Use CONST0_RTX instead
	of const0_rtx.
	(output_fp_move_double): Handle copying a CONST0_RTX
	into FP or integer registers.
	(print_operand): Handle "%r0" for DFmode and SFmode
	values too.

From-SVN: r3391