* local-alloc.c (update_equiv_regs): Use gcc_assert, gcc_unreachable.
	(block_alloc, find_free_reg): Likewise.
	* loop-doloop.c (doloop_modify): Likewise.
	* loop-invariant.c (record_use): Likewise.
	* loop-iv.c (get_biv_step_1, get_biv_step, iv_analyze,
	get_iv_value, canon_condition, eliminate_implied_condition,
	eliminate_implied_condition, simplify_using_initial_values,
	shorten_into_mode, canonicalize_iv_subregs,
	iv_number_of_iterations): Likewise.
	* loop-unroll.c (expand_var_during_unrolling): Likewise.
	* loop-unswitch.c (compare_and_jump_seq, unswitch_single_loop,
	unswitch_loop): Likewise.
	* loop.c (INSN_LUID, loop_optimize, rtx_equal_for_loop_p,
	move_movables, replace_call_address, find_and_verify_loops,
	rtx_equal_for_prefetch_p, fold_rtx_mult_add, loop_iterations,
	record_giv, final_giv_value, general_induction_var,
	simplify_giv_expr, extension_within_bounds_p, try_copy_prop,
	loop_giv_dump): Likewise.

From-SVN: r97394