DWARF2 frame notes for hppa.

DWARF2 frame notes for hppa.

	* dwarf2out.c (dwarf2out_frame_debug_expr): Support adjusting
	stack pointer via a LO_SUM.  Ditto for setting a temp register
	used to save to the stack.  Set cfa_temp when setting fp, and
	allow matches to cfa_temp in addition to cfa_store when saving
	regs.  Handle POST_INC and LO_SUM register stores.  Document the
	changes and errors in rule 12 doco.

	* pa.c (set_reg_plus_d, store_reg, load_reg): Return last insn.
	(actual_fsize, local_fsize, save_fregs): Move for store_reg to see.
	(load_reg): Move closer to epilogue code.
	(DO_FRAME_NOTES): Define to control the following..
	(FRP): Define to set RTX_FRAME_RELATED_P on insns.
	(hppa_expand_prologue): Use FRP and REG_FRAME_RELATED_EXPR
	notes as necessary.
	(hppa_expand_epilogue): Likewise.

From-SVN: r41074