+2006-05-19  Daniel Berlin  <dberlin@dberlin.org>
+            Kenneth Zadeck <zadeck@naturalbridge.com>
+
+       PR rtl-optimization/26855
+
+       * df-scan.c (mw_reg_pool, mw_link_pool): New allocation pools for
+       multiword refs.
+       (df_scan_alloc): Added code to properly handle multiword hard
+       registers and add all_blocks parameter.
+       (df_scan_free_internal, df_insn_refs_delete, df_ref_record): Added
+       code to properly handle multiword hard registers.
+       (df_rescan_blocks): Added code to remove deleted blocks from
+       bitmap.
+       (df_ref_create_structure, df_ref_record): Added code to properly
+       handle subregs.
+       (df_ref_record_1): Changed DF_REF_CLOBBER into DF_REF_MUST_CLOBBER
+       and set DF_REF_PARTIAL.
+       (df_defs_record): Changed DF_REF_CLOBBER into DF_REF_MUST_CLOBBER.
+       (df_uses_record): Added DF_REF_PARTIAL for subreg. 
+       (df_scan_add_problem): Added flags parameter.
+       (df_ref_create_structure): Changed switching structure.
+       (df_bb_refs_record): Fixed case where duplicate artificial refs
+       were created.  Changed location of flags.
+       (df_record_entry_block_defs): Added code to make stack pointer
+       live in entry block.  Refined cases where frame pointer is needed.
+       Changed location of flags.
+       (df_record_exit_block_uses, df_insn_refs_record): Changed location of flags.
+       (df_set_state): Removed function.
+       (df_grow_reg_info, df_reg_chain_unlink, df_ref_remove,
+       df_insn_create_insn_record, df_insn_refs_delete, 
+       df_ref_create_structure): Formatting changes.  
+       * df-core.c (df_mvs_dump, df_set_flags, df_clear_flags,
+       df_delete_basic_block): New function.
+       (df_init): Changed location of flags.
+       (df_add_problem): Added flags parameter and the way flags are
+       processed.
+       (df_insn_uid_debug, df_ref_debug, debug_df_defno, debug_df_ref,
+       debug_df_chain): Improved debugging output.
+       (df_insn_debug, df_insn_uid_debug): Added multiword reg support.
+       (df_refs_chain_dump): Removed df parameter.
+       (df_iterative_dataflow): Added consistency check.
+       (df_prune_to_subcfg): Made public.
+       (df_analyze_problem): Added blocks_to_init parameter and made
+       public.
+       (df_ref_record, df_bb_refs_record, df_mark_reg, 
+        df_record_exit_block_uses): Whitespace changes.
+       (df_dump): Whitespace changes.
+       * df.h: Some reordering to remove forward references.
+       (df_ref_flags.DF_REF_MW_HARDREG, DF_REF_PARTIAL,
+       DF_REF_MUST_CLOBBER, DF_REF_MAY_CLOBBER): New fields.
+       (df_ref_flags.DF_REF_CLOBBER): Deleted field.
+       (dataflow.flags): New field.
+       (df.flag): Deleted field.
+       (df_alloc_function): Added additional bitmap parameter.
+       (df_dependent_problem_function): New type.
+       (df_problem.changeable_flags): New field.
+       (df_ref_flags.DF_REF_DIES_AFTER_THIS_USE, DF_SCAN_INITIAL,
+       DF_SCAN_GLOBAL, DF_SCAN_POST_ALLOC, df_state): Removed.
+       (df_mw_hardreg): New struct.
+       (DF_INSN_UID_MWS): New macro.
+       (df_refs_chain_dump, df_ref_debug, df_chain_dump): Removed df
+       parameter.
+       (df_add_problem, df_ru_add_problem, df_rd_add_problem,
+       df_lr_add_problem, df_ur_add_problem, df_urec_add_problem,
+       df_ri_add_problem, df_scan_add_problem): Added flags parameter.
+       (df_set_state): Removed function.
+       (df_set_flags, df_clear_flags, df_delete_basic_block) New functions.
+       * df-problems.c (df_chain_dump): Removed df parameter.
+       (df_ru_alloc, df_rd_alloc, df_lr_alloc, df_ur_alloc,
+       df_urec_alloc, df_chain_alloc, df_ri_alloc): Added all blocks
+       parameter.
+       (df_ru_alloc, df_rd_alloc): Now resets all blocks.
+       (df_rd_bb_local_compute_process_def, df_ur_bb_local_compute,
+       df_chain_create_bb, df_create_unused_note, df_ri_bb_compute):
+       Split DF_REF_CLOBBER into DF_REF_MAY_CLOBBER and
+       DF_REF_MUST_CLOBBER cases.
+       (df_ru_bb_local_compute_process_def,
+       df_rd_bb_local_compute_process_def, df_lr_bb_local_compute,
+       df_lr_bb_local_compute, df_ur_bb_local_compute,
+       df_chain_create_bb): Made subreg aware.
+       (df_ru_bb_local_compute, df_rd_bb_local_compute,
+       df_lr_bb_local_compute, df_lr_bb_local_compute,
+       df_chain_create_bb): Cleanup to use proper macros.
+       (df_ur_local_finalize, df_urec_local_finalize): Removed unnecessary
+       code to fixup bitvectors.
+       (df_ri_alloc): Cleared lifetime.
+       (df_ignore_stack_reg, df_kill_notes, df_set_notes_for_mw,
+       df_create_unused_note): New function.
+       (df_ri_bb_compute, df_ri_compute): Added code to create/update
+       REG_DEAD and REG_UNUSED notes as well as register information.
+       (df_ru_dump, df_rd_dump, df_lr_dump, df_ur_dump, df_urec_dump,
+       df_chains_dump): Fixed crash if problem was never run.
+       (df_ru_add_problem, df_rd_add_problem, df_lr_add_problem,
+       df_ur_add_problem, df_urec_add_problem, df_chain_add_problem,
+       df_ri_add_problem): Processes flags in uniform manner.
+       (df_ru_alloc, df_ru_local_compute, df_ru_confluence_n, df_ru_free,
+       df_ru_dump, df_rd_local_compute, df_rd_confluence_n, df_rd_free,
+       df_rd_dump, df_urec_free_bb_info): Formatting changes.
+       (df_ru_free_bb_info, df_ru_bb_local_compute, df_ru_dump,
+       df_rd_free_bb_info, df_rd_bb_local_compute_process_def,
+       df_rd_bb_local_compute, df_rd_dump, df_lr_free_bb_info,
+       df_lr_bb_local_compute, df_lr_local_compute, df_ur_free_bb_info,
+       df_ur_dump, df_urec_free_bb_info, df_urec_dump,
+       df_chain_create_bb, df_ri_bb_compute): Whitespace changes.
+       * modulo-sched.c (sms_schedule): Added flag parameter to calls.
+       * see.c (see_initialize_data): Ditto.
+       * final.c (rest_of_clean_state) Added regstack_completed.
+       * rtl.h (regstack_completed): Ditto.
+       * reg-stack.c (regstack_completed): Ditto.
+

From-SVN: r113960