More rtx to rtx_insn * cleanups

More rtx to rtx_insn * cleanups

gcc/ChangeLog:
	* config/frv/frv-protos.h (frv_ifcvt_modify_insn): Strengthen 3rd
	param from rtx to rtx_insn *.
	* config/frv/frv.c (frv_ifcvt_add_insn): Likewise for "insn"
	param.
	(frv_ifcvt_modify_insn): Likwise.
	(frv_ifcvt_modify_final): Likwise for local "existing_insn",
	adding an as_a <rtx_insn *> cast.  Likewise for local "insn".
	* config/mips/mips.c (r10k_insert_cache_barriers): Add an
	as_a <rtx_insn *> cast to local "unprotected_region" once
	it's been established that it's not NULL or pc_rtx.
	* config/nds32/nds32-relax-opt.c (nds32_group_insns): Strengthen
	param "sethi" from rtx to rtx_insn *.
	(nds32_group_float_insns): Likewise for param "insn".
	* config/vax/vax-protos.h (vax_output_int_add): Likewise for 1st
	param.
	(vax_output_int_subtract): Likewise.
	* config/vax/vax.c (vax_output_int_add): Likewise for param
	"insn".
	(vax_output_int_subtract): Likewise.
	* emit-rtl.c (set_insn_deleted): Likewise, removing cast.
	(emit_pattern_after): Likewise for param "after".
	(emit_insn_after): Likewise.
	(emit_jump_insn_after): Likewise.
	(emit_call_insn_after): Likewise.
	(emit_debug_insn_after): Likewise.
	(emit_pattern_before): Likewise for param "before".
	(emit_insn_before): Likewise.
	(emit_jump_insn_before): Likewise.
	* final.c (get_insn_template): Likewise for param "insn", removing
	a cast.
	* output.h (get_insn_template): Likewise for 2nd param.
	* rtl.h (emit_insn_before): Likewise.
	(emit_jump_insn_before): Likewise.
	(emit_debug_insn_before_noloc): Likewise.
	(emit_insn_after): Likewise.
	(emit_jump_insn_after): Likewise.
	(emit_call_insn_after): Likewise.
	(emit_debug_insn_after): Likewise.
	(set_insn_deleted): Likewise for param.

From-SVN: r261715