* except.c (dw2_build_landing_pads): Use word_mode, not Pmode,
	as ncessary.
	(expand_eh_return): Convert between word_mode and Pmode.
	* unwind-dw2.c (extract_cie_info): Do not assume words and pointers
	are the same size.
	(execute_stack_op): Likewise.
	(execute_cfa_program): Likewise.
	(uw_frame_state_for): Likewise.
	(uw_update_context_1): Likewise.
	* unwind.inc (_Unwind_Reason_Code): Likewise.
	* config/mips/mips.h (EH_RETURN_DATA_REGNO): Define.
	(EH_RETURN_STACKADJ_RTX): Likewise.
	* config/mips/mips.c (compute_frame_size): Make space for saving
	EH return registers.
	(mips_expand_epilogue): Handle EH stack adjustments.
	* config/mips/mips.md (eh_return): New pattern.
	(eh_set_lr_si): Likewise.
	(eh_set_lr_di): Likewise.
	Add splitter to perform EH return after reload.

From-SVN: r42332