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Committing ChangeLog that goes with hot/cold partitioning fix I checked in...

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Committing ChangeLog that goes with hot/cold partitioning fix I checked
in earlier today (I forgot to check in the ChangeLog at the time and only
just noticed).

From-SVN: r97347
This commit is contained in:
Caroline Tice 2005-03-31 11:38:44 -08:00
parent 92cf604f5b
commit f7052523f6
1 changed files with 176 additions and 0 deletions
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@ -34,6 +34,182 @@
callers.
(do_tlink): Check lderrout as well as ldout.
2005-03-31 Caroline Tice <ctice@apple.com>
* Makefile.in (varasm.o): Add basic-block.h to list of requirements.
(bb-reorder.o): Add errors.h to list of requirements.
(STAGEFEEDBACK_FLAGS_TO_PASS): Add -freorder-blocks-and-partition to
profiledbootstrap flags.
* bb-reorder.c (errors.h): Add new include.
(struct bbro_basic_block_data_def): Add new field, in_trace.
(add_unlikely_executed_notes): Remove function.
(mark_bb_for_unlikely_executed_section): Remove function.
(insert_section_boundary_note): New function.
(verify_hot_cold_block_grouping): New function.
(push_to_next_round_p): Remove variables and tests that push all
cold blocks to last round.
(find_traces): Remove code that added extra round of trace finding
when doing partitioning.
(find_traces_1_round) : Remove variable last_round; add code to
update new struct field, in_trace; correct trace_length where it was
incorrect before (after call to copy_bb); change code that pushed all
cold blocks to last round. Instead verify that all blocks going into
a trace belong in the same partition.
(connect_traces): Modify to connect the traces in two passes, if the
function contains both hot and cold blocks. The first pass connects
all the traces for blocks in the partition that the first block in
the function belongs to; the second pass connnects all the traces
containing blocks that belong in the other partition.
(find_rarely_executed_basic_blocks_and_crossing_edges): Remove
code that automatically put the first block in a function into the
hot partition if the function had any hot blocks.
(fix_crossing_unconditional_branches): Check number of succ edges
before attempting to get one.
(fix_edges_for_rarely_executed_code): Update comment describing
function.
(reorder_basic_blocks): Add code to initialize new field (in_trace);
remove call to add_unlikely_executed_notes; add call to
verify_hot_cold_block_grouping.
(duplicate_computed_gotos): Don't change computed goto if it's a
crossing edge.
(partition_hot_cold_basic_blocks): Update function comment.
* cfgcleanup.c (try_simplify_condjump): Remove redundacy from
condition.
(try_forward_edges): Likewise.
(merge_blocks_move_predecessor_nojumps): Likewise.
(merge_blocks_move_successor_nojumps): Likewise.
(merge_blocks_move): Likewise.
(try_crossjump_bb): Likewise.
* cfglayout.c (update_unlikely_executed_notes): Remove function.
(fixup_reorder_chain): Remove code for adding UNLIKELY_EXECUTED_CODE
notes to cold bb's; remove call to update_unlikely_executed_notes.
(duplicate_insn_chain): change NOTE_INSN_UNLIKELY_EXECUTED_CODE to
NOTE_INSN_SWITCH_TEXT_SECTIONS.
* cfglayout.h (scan_ahead_for_unlikely_executed_note): Remove
function declaration.
* cfgrtl.c (can_delete_note_p): Remove UNLIKELY_EXECUTED_CODE note
from consideration.
(rtl_can_merge_blocks): Remove redundancy from condition.
(try_redirect_by_replacing_jump): Likewise.
(force_nonfallthru_and_redirect): Remove code for adding
UNLIKELY_EXECUTED_CODE notes to cold bb's.
(commit_one_edge_insertion): Likewise.
(cfg_layout_can_merge_blocks_p): Remove redundancy from condition.
* dbxout.c (FORCE_TEXT): Replace function_section with
current_function_section.
(struct dbx_debug_h): Add do_nothing function for new debug_hooks
function, switch_text_section.
(struct xcoff_debug): Likewise.
(dbxout_function_end): Add code to put out label diffs for both
hot and cold sections.
* debug.c (struct do_nothing_debug_hooks): Add do_nothing function
for new debug_hooks funciton, switch_text_section..
* debug.h (struct gcc_debug_hooks): Add new function to debug_hooks,
switch_text_section.
* dwarf2out.c (struct dw_fde_struct): Add five new fields:
dw_fde_hot_section_label, dw_fde_hot_section_end_label,
dw_fde_unlikely_section_label, dw_fde_unlikely_section_end_label and
dw_fde_switched_sections.
(output_call_frame_info): Add test to see if function switches text
sections in the middle; if so, use appropriate extra hot and cold
section labels to compute size deltas for the hot and cold sections.
(dwarf2out_begin_prologue): Add code to initialize new fields in
dw_fde_struct.
(dwarf2out_switch_text_section): New function (invoked through
debug_hook); updates new fields in dw_fde_struct appropriately and
increments separate_line_info_table_in_use.
(dwarf2_debug_hooks): Initialize switch_text_section function to be
dwarf2out_switch_text_section.
(struct var_loc_node): Add new field, section_label.
(output_aranges): Add code to check whether in hot or cold section and
use the appropriate label in calculating deltas.
(output_ranges): Likewise.
(output_line_info): Add code to check which section we're in and
use appropriate hot/cold label.
(add_location_or_constant_value_attribute): Likewise.
(gen_subprogam_die): Modify arange attributes to use correct labels.
(dwarf2out_begin_block): Change call to function_section into call to
current_function_section.
(dwarf2out_end_block): Likewise.
(dwarf2out_source_line): Likewise.
(dwarf2out_var_location): Add code to check whether in hot or cold
section and use the appropriate label.
* except.c (output_function_exception_table): Change call to
function_section into call to current_function_section.
* final.c (profile_function): Likewise.
(scan_ahead_for_unlikely_executed_note): Remove function.
(final_scan_insn): Remove calls to
scan_ahead_for_unlikely_executed_note, and related code for switching
to cold section, except for the single time
NOTE_INSN_SWITCH_TEXT_SECTIONS may be encountered; add calls to
debug_hooks->switch_text_sections; replace appropriate calls to
function_section with calls to current_function_section.
* ifcvt.c (find_if_case_1): Remove redundancy from condition, add
test_bb to condition.
(find_if_case_2): Likewise.
* insn-notes.def: Change NOTE_INSN_UNLIKELY_EXECUTED_CODE to
NOTE_INSN_SWITCH_TEXT_SECTIONS. Update comment appropriately.
* opts.c (decode_options): Change warning about hot/cold partitioning
with exceptionss to inform (so as not to cause bootstrap failures);
remove warning about partitioning with DWARF debug info.
* output.h (current_function_section): Add new function decl.
(insert_section_boundary_note): Likewise.
(enum in_section): Move this declaration here from varasm.c.
(unlikely_section_label): Likewise.
(unlikely_text_section_name): Likewise.
(last_text_section_name): New global variable.
(last_text_section): Likewise.
(hot_section_label): Likewise.
(hot_section_end_label): Likewise.
(cold_section_end_label): Likewise.
* passes.c (rest_of_handle_final): Free unlikely_text_section_name.
* print-rtl.c (print_rtx): Change NOTE_INSN_UNLIKELY_EXECUTED_CODE
to NOTE_INSN_SWITCH_TEXT_SECTIONS.
* reg-stack.c (emit_swap_insn): Remove UNLIKELY_EXECUTED_CODE note
insn from consideration.
* sdbout.c (sdb_debug_hooks): Add do_nothing for new function,
switch_text_section.
* varasm.c (basic-block.h): Add new include.
(unlikely_section_label_printed): Remove global variable.
(unlikely_section_label): Make global variable not be static any more.
(unlikely_text_section_name): Likewise.
(hot_section_end_label): New global variable (not static)
(first_function_block_is_cold): Likewise.
(hot_section_label): Likewise.
(cold_section_end_label): Likewise..
(last_text_section): New global variable, not static.
(last_text_section_name): New global variable, not static.
(initialize_cold_section_name): New function.
(enum in_section): Move declaration to output.h.
(text_section): Update last_text_section.
(unlikely_text_section): Replace code to determine cold section name
with call to initialize_cold_section_name; Add code to update
last_text_section; remove code for printing out label.
(named_section_real): Add code to update last_text_section and
last_text_section_name as appropriate.
(function_section): Change test for 'unlikely' to depend on
first_function_block_is_cold (moved old test to
current_function_section).
(current_function_section): New function.
(assemble_start_function): Move code that frees
unlikely_text_section_name; initialize hot_section_end_label;
print hot and cold section labels at the start of the function;
set first_function_block_is_cold, if appropriate; initialize l
ast_text_section; add call to insert_section_boundary_note.
(assemble_end_function): Add code to write out hot and cold section
end labels.
*vmsdbgout.c (vmsdbg_debug_hooks): Add do_nothing for new function,
switch_text_section.
* config/darwin.c (machopic_select_section): Replace incorrect
function in base_funs; update reloc for cold sections if necessary.
* config/darwin.h (SECTION_FUNCTION): Add code to update
last_text_section if appropriate.
(text_unlikely_section): Remove.
* config/sparc/sparc.c (sparc_output_deferred_case_vectors): Likewise.
* config/stormy16/stormy16.c (stormy_16_output_addr_vec): Likewise.
* config/xtensa/xtensa.c (override_options): Turn off hot/cold
partitioning for this architecture.
2005-03-31 Olivier Hainque <hainque@adacore.com>
* dwarf2out.c (dwarf2out_frame_finish): Honor DWARF2_FRAME_INFO