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[Bug middle-end/54146] Very slow compile with attribute((flatten))
- From: "steven at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 17 Aug 2012 09:42:15 +0000
- Subject: [Bug middle-end/54146] Very slow compile with attribute((flatten))
- Auto-submitted: auto-generated
- References: <bug-54146-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54146
--- Comment #54 from Steven Bosscher <steven at gcc dot gnu.org> 2012-08-17 09:42:15 UTC ---
Author: steven
Date: Fri Aug 17 09:42:06 2012
New Revision: 190475
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190475
Log:
PR middle-end/54146
* tree-ssa-loop-im.c (lim_bitmap_obstack): New bitmap_obstack.
(memref_free): Don't free the bitmaps individually here.
(mem_ref_alloc): Allocate the bitmaps on the new bitmap obstack.
(analyze_memory_references): Likewise.
(tree_ssa_lim_initialize): Initialize the new bitmap obstack.
(tree_ssa_lim_finalize): Release it.
* dse.c (dse_bitmap_obstack): New bitmap obstack.
(dse_obstack): New obstack.
(get_group_info): Allocate the bitmaps on the new bitmap obstack.
(dse_step0): Allocate the scratch bitmap on reg_obstack. Initialize
the new bitmap obstack and normal obstack. Use XNEWVEC for bb_table.
(record_store): Allocate regs_set on reg_obstack.
(dse_step1): Allocate regs_live on reg_obstack.
(dse_step2_init): Allocate offset_map_n and offset_map_p on the new
obstack.
(dse_step3_scan): Allocate bitmaps on the new bitmap obstack.
(dse_step3): Likewise.
(dse_confluence_0): Likewise.
(dse_confluence_n): Likewise.
(dse_transfer_function): Likewise.
(dse_step7): Destroy the new obstacks, and everything allocated on
them, in one big sweep.
(rest_of_handle_dse): Update.
* cfgexpand.c (stack_var_bitmap_obstack): New bitmap obstack.
(add_stack_var_conflict): Allocate bitmaps on it.
(add_scope_conflicts_1): Likewise.
(add_scope_conflicts): Likewise.
(update_alias_info_with_stack_vars): Likewise.
(init_vars_expansion): Move TREE_USED fiddling expand_used_vars.
Initialize the new bitmap obstack.
(fini_vars_expansion): Release it.
(estimated_stack_frame_size): Use init_vars_expansion to set things up
and always clean up at the end.
(expand_used_vars): Do the TREE_USED trickery here. Always call
fini_vars_expansion.
* tree-ssa-live.h (struct tree_live_info_d): Make livein and liveout
arrays of bitmap_head to avoid one indirection per bitmap access.
(live_on_entry, live_on_exit, live_var_map, live_merge_and_clear,
make_live_on_entry): Update.
* tree-ssa-live.c (partition_view_bitmap): Don't double-free 'used'.
(liveness_bitmap_obstack): New bitmap obstack.
(remove_unused_locals): Use it to allocate all bitmaps on. Update
for livein/liveout changes in tree-ssa-live.h.
(delete_tree_live_info): Release the bitmap obstack.
(loe_visit_block, live_worklist, set_var_live_on_entry,
calculate_live_on_exit, dump_live_info): Update.
(calculate_live_ranges): Initialize the bitmap.
* tree-ssa-ter.c (ter_bitmap_obstack): New bitmap obstack.
(new_temp_expr_table): Allocate bitmap on it.
(make_dependent_on_partition, add_to_partition_kill_list,
add_dependence, process_replaceable): Likewise.
(find_replaceable_exprs): Initialize and release the new obstack here.
* df-problems.c (df_lr_add_problem): Allocate persistent bitmap
for out_of_date_transfer_functions on df_bitmap_obstack.
(df_live_add_problem): Likewise.
(df_chain_add_problem): Likewise.
(df_word_lr_add_problem): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgexpand.c
trunk/gcc/df-problems.c
trunk/gcc/dse.c
trunk/gcc/tree-ssa-live.c
trunk/gcc/tree-ssa-live.h
trunk/gcc/tree-ssa-loop-im.c
trunk/gcc/tree-ssa-loop-manip.c
trunk/gcc/tree-ssa-ter.c