mips.c (USEFUL_INSN_P): Use NONDEBUG_INSN_P instead of INSN_P.

mips.c (USEFUL_INSN_P): Use NONDEBUG_INSN_P instead of INSN_P.

gcc/
	* config/mips/mips.c (USEFUL_INSN_P): Use NONDEBUG_INSN_P instead
	of INSN_P.
	(mips16e_collect_argument_saves): Skip debug instructions.
	(mips_74k_agen_init): Use CALL_P || JUMP_P instead of !NONJUMP_INSN_P.
	(mips16_lay_out_constants): Use USEFUL_INSN_P instead of INSN_P.
	(r10k_insert_cache_barriers): Likewise.
	(mips_reorg_process_insns): Likewise.

From-SVN: r151391