* doc/invoke: Document -fpartition-functions-into-sections
	new flag.
	* tree-pass.h (pass_partition_blocks_size): Add new RTL pass.
	(pass_partition_blocks): Rename to...
	(pass_partition_blocks_hot_cold): This.
	(TODO_check_sections): Define.
	* target.h (bb_partitioning_into_sections): New struct in
	gcc_target.
	(estimate_section_overhead, estimate_instruction_size,
	start_new_section): New members to gcc_target.bb_partitioning.
	* ddg.c (mem_read_insn_p, mem_write_insn_p): Remove static.
	* ddg.h (mem_read_insn_p, mem_write_insn_p): Declare. 
	* final.c (final_scan_insn): Support new functionality.
	(pass_final): Add TODO_check_sections to todo_flags_start field.
	* toplev.c (process_options): Disable
	-fpartition-functions-into-sections if profile_flag or
	flag_unwind_tables are set, -ffunction-sections is not supported
	or debugging is set.
        * opts.c (common_handle_option): Handle
        OPT_fpartition_functions_into_sections.
        (decode_options): Disable the new functionality if
        HAS_LONG_COND_BRANCH or HAS_LONG_UNCOND_BRANCH are not defined;
        target does not supports have_named_sections; flag_exceptions or
        flag_unwind_tables are set.  Issue a warning that it doesn't work.
        * timevar.def (TV_PARTITION_BLOCKS_SIZE): New.
        * function.h (section_start_labels, section_end_labels,
        unlikely_part_text_section_name, part_text_section_name,
        number_of_sections, first_text_section_part_changed): New fields
        to function_subsections struct.
        (const_str): Define and DEF_VEC.
        * print-rtl.c (print_rtx): Avoid printing the basic-block number
        if -fpartition-functions-into-sections is set.
        * cfglayout.c: (relink_block_chain): Clear skip field.
        * common.opt (fpartition-functions-into-sections): Document
        new flag.
        * varasm.c (last_part_text_section_name): New variable.
        (in_part_section_p): Likewise.
        (initialize_part_section_name, text_part_section,
        output_sections): New functions.
        (function_section, current_function_section,
        assemble_start_function, assemble_end_function,
        default_section_type_flags): Support new functionality.
        * target-def.h (TARGET_ESTIMATE_SECTION_OVERHEAD,
        TARGET_ESTIMATE_INSTRUCTION_SIZE, TARGET_START_NEW_SECTION,
        TARGET_BB_PARTITIONING): Define.
        * rtl.h (NOTE_TEXT_SECTION): Define to hold the section id.
        * output.h (text_part_section): Add declaration.
        * bb-reorder.c (cfgloop.h, langhooks.h, hashtab.h, vec.h):
        New includes.
        (find_rarely_executed_basic_blocks_and_crossing_edges,
        partition_hot_cold_basic_blocks): Remove.
        (add_labels_and_missing_jumps,
        fix_edges_for_rarely_executed_code): Pass VEC instead of edge *.
        (partition_callbacks, loop_info_def,
        funcpart_basic_block_data_def, insn_aux) New structures.
        (loop_info): New typedef and DEF_VEC.
        (insns_aux, estimate_section_overhead, estimate_max_section_size,
        fbb_data_size, fbb_data): New static variables.
        (validate_fbb_data_element, estimate_size_of_insns_in_bb,
        split_bb, size_insert_section_boundary_note,
        start_new_section, start_new_section_for_loop,
        create_sections, size_crossing_edge_p, partition_basic_blocks,
        partition_hot_cold_init, partition_hot_cold_finalize,
        mark_hot_cold_blocks, hot_cold_crossing_edge_p,
        mark_crossing_edges, calculate_loop_boundary, loop_size_is_less,
        record_insns_size_estimation, record_loops_boundaries,
        free_fbb_data, check_unexpected_insns, partition_size_init,
        partition_size_finalize, get_estimate_section_overhead,
        instruction_size_exceeds_threshold,
        gate_handle_partition_blocks_size,
        rest_of_handle_partition_blocks_size, check_sections): New
        functions.
        (rest_of_handle_partition_blocks): Rename to...
        (rest_of_handle_partition_blocks_hot_cold): This and use the
        new callback functions to do the transformation.
        (gate_handle_partition_blocks): Rename to...
        (gate_handle_partition_blocks_hot_cold): This.
        (pass_partition_blocks): Rename to...
        (pass_partition_blocks_hot_cold): This.
        (insert_section_boundary_note): Avoid
        emitting NOTE_INSN_SWITCH_TEXT_SECTIONS if
        -fpartition-functions-into-sections is set.
        (pass_partition_functions): New pass.
        * Makefile.in (bb-reorder.o): Add CFGLOOP_H,
        LANGHOOKS_DEF_H, HASHTAB_H, vec.h to dependencies.
        * basic-block.h (bb_flags): Add new BB_FIRST_AFTER_SECTION_SWITCH
        flag.
	(skip): Add new field to struct rtl_bb_info.	
        (check_sections): Add declaration.
        * passes.c (pass_partition_blocks): Rename to...
        (pass_partition_blocks_hot_cold): This.
        (pass_partition_blocks_size): New.
        (execute_todo): Call to check_sections function.
        * config/spu/spu.c (vec.h): New include.
        (critical_section_type): New enum.
	(spu_estimate_instruction_size, spu_estimate_section_overhead,
	record_jump_table, end_critical_section, begin_critical_section,
	close_critical_sections, get_stub_size, spu_start_new_section):
	New functions.
	(critical_sections): New struct.
	(critical_sections_t): New typedef and DEF_VEC.
        (TARGET_ESTIMATE_SECTION_OVERHEAD,
        TARGET_ESTIMATE_INSTRUCTION_SIZE, TARGET_START_NEW_SECTION):
        Override.
        (spu_override_options): call fix_range to support new functionality.
        * config/spu/spu.h (HAS_LONG_COND_BRANCH, HAS_LONG_UNCOND_BRANCH):
        Define.
        * config/spu/spu.opt (mstub-size): New flag.
        * cfgrtl.c (rtl_verify_flow_info_1, rtl_verify_flow_info):
        Consider NOTE_INSN_VAR_LOCATION note.