ia64.c (ia64_encode_addr_area): Use gcc_assert and gcc_unreachable as appropriate.

ia64.c (ia64_encode_addr_area): Use gcc_assert and gcc_unreachable as appropriate.

	* config/ia64/ia64.c (ia64_encode_addr_area): Use gcc_assert and
	gcc_unreachable as appropriate.
	(ia64_expand_load_address, ia64_expand_tls_address,
	ia64_split_tmode, ia64_split_tmode_move, ia64_expand_compare,
	ia64_expand_vecint_compare, ia64_expand_vecint_minmax,
	next_scratch_gr_reg, ia64_initial_elimination_offset,
	ia64_expand_prologue, ia64_expand_epilogue,
	ia64_output_dwarf_dtprel, ia64_print_operand,
	ia64_register_move_cost, first_instruction, rws_access_regno,
	update_set_flags, rtx_needs_barrier, group_barrier_needed_p,
	ia64_sched_init, ia64_variable_issue,
	ia64_first_cycle_multipass_dfs_lookahead_guard,
	ia64_dfa_new_cycle, issue_nops_and_insn, get_template, bundling,
	ia64_st_address_bypass_p, ia64_ld_address_bypass_p, process_set,
	process_for_unwind_directive, ia64_hpux_file_end): Likewise.
	* config/ia64/ia64.h (ASM_OUTPUT_ADDR_VEC_ELT): Likewise.
	* config/ia64/ia64.md (*arm_movdi_vfp, *movdf_vfp): Likewise.
	* config/ia64/predicates.md (got_symbolic_operand,
	sdata_symbolic_operand): Likewise.
	* config/ia64/vect.md (vcondv2sf): Likewise.

From-SVN: r98817