* df.c (iterate_dataflow_sbitmap, iterate_dataflow_bitmap):
	Add casts to remove warnings.

From-SVN: r47412

2001-11-25  Daniel Berlin  <dan@cgsoftware.com>

	* df.c: Add prototypes for hybrid_search_bitmap and
	hybrid_search_sbitmap.
	(hybrid_search_bitmap): New function.
	(hybrid_search_sbitmap): New function.
	(iterative_dataflow_sbitmap): Change to use hybrid_search_sbitmap.
	(iterative_dataflow_bitmap): Ditto.

From-SVN: r47326

	* ChangeLog.0, ChangeLog.2, ChangeLog.3, ChangeLog.4, ChangeLog,
	FSFChangeLog.10, c-decl.c, cppfiles.c, cppinit.c, cpplex.c,
	cpplib.c, cppmain.c, cse.c, df.c, diagnostic.c, dominance.c,
	dwarf2out.c, dwarfout.c, emit-rtl.c, errors.c, except.c, except.h,
	explow.c, function.c, gcse.c, genrecog.c, predict.c, regmove.c,
	sched-rgn.c, ssa-ccp.c, stmt.c, toplev.c: Fix spelling errors.

From-SVN: r47279

	* gcse.c (try_replace_reg): Copy RTX before creating note.

	* df.h (df_ref_flags): New uenum.
	(DF_REF_FLAGS): New macro.
	(struct ref): Add field "flags".
	* df.c (HANDLE_SUBREG): Remove.
	(df_ref_create): Likewise; set flags field of ref.
	(df_def_record_1): Strip down read_write subreg; remove
	commented out code; set READ_WRITE flag.
	(read_modify_subreg_p): New static function.
	(df_uses_record): Cleanup SET handling; set READ_WRITE flag;
	new argument "flags".
	(df_insn_refs_record): Update call of df_uses_record.
	(df_insn_modify): Avoid #if 0 around comment.
	(df_dump): Dump the read/write flag.

	* predict.c (propagate_freq): Make cyclic_probability and frequency
	volatile

	* i386.c (ix86_cc_mode): Accept USE.

	* cfgrtl.c (purge_dead_edges):  Cleanup EDGE_ABNORMAL flag if computed
	jump is turned into simplejump.

From-SVN: r47175

2001-11-07  Daniel Berlin  <dan@cgsoftware.com>

        * Makefile.in (df.o): Add fibheap.h to dependencies.

        * df.h: Add prototypes for transfer functions, iterative_dataflow
        functions.
        (enum df_flow_dir): New enum.
        (enum df_confluence_op): New enum.
        (struct df): Add inverse_rts_map.

        * df.c: Add sbitmap.h to the list of includes.
        (df_rd_global_compute): Removed.
        (df_ru_global_compute): Removed.
        (df_lr_global_compute): Removed.
        (df_rd_transfer_function): New function.
        (df_ru_transfer_function): New function.
        (df_lr_transfer_function): New function.
        (df_analyse_1): allocate/compute/free df->inverse_rts_map.
        Use iterative_dataflow_bitmap instead of df_*_global_compute.
        (iterative_dataflow_sbitmap): New function.
        (iterative_dataflow_bitmap): New function.

From-SVN: r46827

2001-11-01  Eric Christopher  <echristo@redhat.com>

        * config.gcc: Revert part of earlier patch.
        * config/mips/linux.h: Ditto.
	* df.c: Include tm_p.h to avoid warnings.
        * config/mips/mips.h (ABI_GAS_ASM_SPEC): Add defaults.  Adjust
	#if/#endif.
	* config/mips/mips.c: Define mips_abi regardless.
	(mips_output_function_prologues): Add long casts for .frame
	output.
	(override_options): Allow use of ABI_32.

From-SVN: r46707

	* lcm.c (optimize_mode_switching):  Do not rebuild liveness information
	when no changes has been made.

	* gcse.c (reg_set_bitmap): Turn into reg_set.
	(modify_mem_list_set, canon_modify_mem_list_set)
	(clear_modify_mem_tables, free_modify_mem_tables): New.
	(gcse_main); Use free_modify_mem_tables.
	(free_gcse_mem): Likewise; free the bitmaps.
	(alloc_gcse_main): Initialize the bitmaps.
	(canon_list_insert): Set canon_modify_mem_list_set.
	(record_last_mem_set_info): Likewise; set modify_mem_list_set.
	(compute_hash_table): Use clear_modify_mem_tables.
	(reset_opr_set_tables): Likewise.
	(oprs_not_set_p): reg_set_bitmap is regset.
	(mark_set, mark_clobber): Likewise.

	* df.h (DF_EQUIV_NOTES): New constant.
	(df_insn_refs_record): Record uses inside or REG_EQUIV/EQUAL notes
	when asked for.

	* sched-rgn.c (CHECK_DEAD_NOTES): New constant.
	(init_regions, schedule_insns): Conditionalize the checking
	code by CHECK_DEAD_NOTES; avoid multiple calls to update_life_info.

From-SVN: r46634

2001-10-10  Stan Shebs  <shebs@apple.com>

        * alias.c: Remove uses of "register" specifier in declarations
        of arguments and local variables.
        * c-common.c: Ditto.
        * c-convert.c: Ditto.
        * c-decl.c: Ditto.
        * c-format.c: Ditto.
        * c-semantics.c: Ditto.
        * c-typeck.c: Ditto.
        * caller-save.c: Ditto.
        * calls.c: Ditto.
        * cfg.c: Ditto.
        * cfgbuild.c: Ditto.
        * cfgrtl.c: Ditto.
        * collect2.c: Ditto.
        * combine.c: Ditto.
        * convert.c: Ditto.
        * cppexp.c: Ditto.
        * cppfiles.c: Ditto.
        * cse.c: Ditto.
        * dbxout.c: Ditto.
        * defaults.h: Ditto.
        * df.c: Ditto.
        * dwarf2out.c: Ditto.
        * dwarfout.c: Ditto.
        * emit-rtl.c: Ditto.
        * explow.c: Ditto.
        * expmed.c: Ditto.
        * expr.c: Ditto.
        * final.c: Ditto.
        * fix-header.c: Ditto.
        * floatlib.c: Ditto.
        * flow.c: Ditto.
        * fold-const.c: Ditto.
        * function.c: Ditto.
        * gcc.c: Ditto.
        * gcse.c: Ditto.
        * gen-protos.c: Ditto.
        * genattrtab.c: Ditto.
        * gencheck.c: Ditto.
        * genconfig.c: Ditto.
        * genemit.c: Ditto.
        * genextract.c: Ditto.
        * genflags.c: Ditto.
        * gengenrtl.c: Ditto.
        * genoutput.c: Ditto.
        * genpeep.c: Ditto.
        * genrecog.c: Ditto.
        * gensupport.c: Ditto.
        * global.c: Ditto.
        * gmon.c: Ditto.
        * graph.c: Ditto.
        * haifa-sched.c: Ditto.
        * hard-reg-set.h: Ditto.
        * hash.c: Ditto.
        * integrate.c: Ditto.
        * jump.c: Ditto.
        * lists.c: Ditto.
        * local-alloc.c: Ditto.
        * loop.c: Ditto.
        * mips-tdump.c: Ditto.
        * mips-tfile.c: Ditto.
        * optabs.c: Ditto.
        * prefix.c: Ditto.
        * print-rtl.c: Ditto.
        * read-rtl.c: Ditto.
        * real.c: Ditto.
        * recog.c: Ditto.
        * reg-stack.c: Ditto.
        * regclass.c: Ditto.
        * regmove.c: Ditto.
        * reload.c: Ditto.
        * reload1.c: Ditto.
        * reorg.c: Ditto.
        * resource.c: Ditto.
        * rtl.c: Ditto.
        * rtlanal.c: Ditto.
        * scan.c: Ditto.
        * sched-deps.c: Ditto.
        * sched-rgn.c: Ditto.
        * sdbout.c: Ditto.
        * simplify-rtx.c: Ditto.
        * stmt.c: Ditto.
        * stor-layout.c: Ditto.
        * toplev.c: Ditto.
        * tradcif.y: Ditto.
        * tradcpp.c: Ditto.
        * tree.c: Ditto.
        * unroll.c: Ditto.
        * varasm.c: Ditto.
        * xcoffout.c: Ditto.

From-SVN: r46173

	* basic-block.h (flow_delete_insn, flow_delete_insn_chain): Kill.
	* cfg.c (delete_insn): Rename from ....; use remove_insn; do not
	remove some labels.
	(flow_delete_insn): This one.
	(delete_insn_chain): Rename from ...; do not care labels.
	(flow_delete_insn_chain): ... this one.
	(flow_delete_block): Remove the insns one BB has been expunged.
	(merge_blocks_nomove): Likewise.
	(try_redirect_by_replacing_jump): Use delete_insn[_chain]; do not care
	updating BB boundaries.
	(tidy_fallthru_edge): Likewise.
	(commit_one_edge_insertion): Likewise.
	* cfgbuild.c (find_basic_block): Likewise.
	(find_basic_blocks_1): Likewise.
	* cfgcleanup.c (merge_blocks_move_predecessor_nojumps): Likewise.
	(try_crossjump_to_edge): Likewise.
	(try_optimize_cfg): Likewise.
	* cse.c (delete_trivially_dead_insns): Likewise.
	* df.c (df_insn_delete): Likewise.
	* doloop.c (doloop_modify): Use delete_related_insns.
	* emit-rtl.c (try_split): Likewise.
	(remove_insn): Update BB boundaries.
	* expect.c (connect_post_landing_pads): Use delete_related_insns.
	* flow.c (delete_dead_jumptables): Use delete_insn[_chain]; do not care
	updating BB boundaries.
	(propagate_block_delete_insn): Likewise.
	(propagate_block_delete_libcall): Likewise.
	* function.c (delete_handlers): Use delete_related_insns.
	(thread_prologue_and_epilogue_insns): Likewise.
	* gcse.c (delete_null_pointer_checks): Use delete_related_insns.
	* genpeep.c (gen_peephole): Use delete_related_insns.
	* ifcvt.c (noce_process_if_block): Use delete_insn; do not care updating
	BB boundaries.
	(find_cond_trap): Likewise.
	* integrate.c (save_for_inline): Use delete_related_insns.
	(copy_insn_list): Likewise.
	* jump.c (pruge_linie_number_notes): Likewise.
	(duplicate_loop_exit_test): Likewise.
	(delete_computation): Likewise.
	(delete_related_insn): Rename from ...; use delete_insn
	(delete_insn): ... this one.
	(redirect_jump): Use delete_related_insns.
	* loop.c (scan_loop): Likewise.
	(move_movables): Likewise.
	(find_and_verify_loops): Likewise.
	(check_dbra_loop): Likewise.
	* recog.c (peephole2_optimize): Likewise.
	* reg-stack.c (delete_insn_for_stacker): Remove.
	(move_for_stack_reg): Use delete_insn.
	* regmove.c (combine_stack_adjustments_for_block): Likewise.
	* reload1.c (delete_address_reloads): Use delete_related_insns.
	(fixup_abnormal_edges): Use delete_insn.
	* recog.c (emit_delay_sequence): Use delete_related_insns.
	(delete_from-delay_slot): Likewise.
	(delete_scheduled_jump): likewise.
	(optimize_skip): Likewise.
	(try_merge_delay_insns): Likewise.
	(full_simple_delay_slots): Likewise.
	(fill_slots_from_thread): Likewise.
	(relax_delay_slots): Likewise.
	(make_return_insns): Likewise.
	(dbr_schedule): Likewise.
	* rtl.h (delete_insn): Rename to delete_related_insns.
	(delete_insn, delete_insn_chain): New prototypes.
	* ssa-ccp (sse_fast_dce):  Remove deleting of DEF, as it is done
	by df_insn_delete already.
	* ssa-dce.c (delete_insn_bb): Use delete_insn.
	* ssa.c (convert_from_ssa): Use delete_related_insns.
	* unroll.c (unroll_loop): Likewise.
	(calculate_giv_inc): Likewise.
	(copy_loop_body): Likewise.

	* i386-protos.h (ix86_libcall_value, ix86_function_value,
	ix86_function_arg_regno_p, ix86_function_arg_boundary,
	ix86_return_in_memory, ix86_function_value): Declare.
	* i386.c (x86_64_int_parameter_registers, x86_64_int_return_registers):
	new static valurables.
	(x86_64_reg_class): New enum
	(x86_64_reg_class_name): New array.
	(classify_argument, examine_argument, construct_container,
	 merge_classes): New static functions.
	(optimization_options): Enable flag_omit_frame_pointer and disable
	flag_pcc_struct_return on 64bit.
	(ix86_libcall_value, ix86_function_value,
	ix86_function_arg_regno_p, ix86_function_arg_boundary,
	ix86_return_in_memory, ix86_function_value): New global functions.
	(init_cumulative_args): Refuse regparm on x86_64, set maybe_vaarg.
	(function_arg_advance): Handle x86_64 passing conventions.
	(function_arg): Likewise.
	* i386.h (FUNCTION_ARG_BOUNDARY): New macro.
	(RETURN_IN_MEMORY): Move offline.
	(FUNCTION_VALUE, LIBCALL_VALUE): Likewise.
	(FUNCTION_VALUE_REGNO_P): New macro.
	(FUNCTION_ARG_REGNO_P): Move offline.
	(struct ix86_args): Add maybe_vaarg.
	* next.h (FUNCTION_VALUE_REGNO_P): Delete.
	* unix.h (FUNCTION_VALUE_REGNO_P): Delete.

From-SVN: r45726

	* basic-block.h (free_bb_for_insn): Declare.
	* bb-reorder.c (label_for_bb): Use block_label.
	(emit_jump_to_block_after): Remove.
	(insert_intra_1): Do not update block_for_insn.
	(insert_inter_bb_scope_notes): Likewise; update bb->end
	* cfg.c (free_bb_for_insn): New.
	(try_rediret_by_replacing_jump): Avoid set_block_for_new_insns call.
	(force_nonfallthru_and_redirect): Likewise; do not update BB boundaries.
	(commit_one_edge_insertion): Likewise.
	(commit_one_edge_insertion): Do not update BB boundary.
	(commit_edge_insertions): Do not call compute_bb_for_insn.
	* cfgbuild.c (find_basic_blocks): Do not free basic_block_for_insn.
	* cfgcleanup.c (merge_blocks_move_predecessor): Use reorder_insns_nobb.
	(merge_blocks_move_successor_nojumps): Likewise.
	(try_crossjump_to_edge): Do not update block_for_insn.
	* combine.c (combine_instructions): Remove compute_bb_for_insn call.
	* df.c (df_pattern_emit_later): Do not update BB boundary.
	(df_jump_pattern_emit_after): Likewise.
	(df_insn_move_before): Use emit_insn_before.
	* emit-rtl.c (try_split): Emit after trial to get bb boundary updated
	 properly.
	(add_insn_after, add_insn_before, emit_insns_after): Update BB
	boundaries and basic_block_for_insn.
	(reorder_insns_nobb): Rename from reorder_insns.
	(reorder_insns): New.
	(emit_block_insn_before, emit_block_insn_after): Kill.
	* flow.c (check_function_return_warnings): Do not call
	compute_bb_for_insn; Do not free basic_block_for_insn.
	(attempt_auto_inc): Do not update basic_block_for_insn.
	* function.c (emit_return_into_block): Likewise;
	do not update BB boundaries.
	* gcse.c (handle_avail_expr): Do not update basic_block_for_insn.
	(insert_insn_end_bb): Use emit_insn_before; Likewise.
	(pre_insert_copy_insn): Likewise.
	(update_ld_motion_notes): Likewise.
	(insert_insn_start_bb): Likewise.
	(replace_store_insn): Likewise.
	* ifcvt.c (noce_process_if_block): Likewise.
	(if_convert): Do not call compute_bb_for_insn.
	* lcm.c (optimize_mode_switching): Do not update BB boundaries.
	Use emit_insn_before and emit_insn_after.
	* recog.c (split_all_insns): Do not update BB boundaries;
	Do not call compute_bb_for_insn.
	(peephole2_optimize): Do not update BB boundaries.
	* reg-stack.c (emit_pop_insn): Use emit_insn_after and
	emit_insn_before.
	(emit_swap_insn): Likewise.
	(convert_regs_1): Likewise.
	* reload1.c (reload): Call compute_bb_for_insn.
	* rtl.h (reorder_insns_nobb): Declare.
	* ssa.c (rename_equivalent_regs): Use emit_insn_before.
	* toplev.c (rest_of_compilation): Call free_bb_for_insn
	at places CFG is invalidated; do not call compute_bb_for_insn.

	* cfg.c (expunge_block): Invalidate BB structure.

	* (merge_blocks_nomove): Update properly BLOCK_FOR_INSN
	array.

	* cfg.c (verify_flow_info): Verify the basic_block_for_insn array.

From-SVN: r45647

2001-08-28  Daniel Berlin  <dan@cgsoftware.com>

	* df.h (struct df): Add rts_order variable.

	* df.c (df_visit_next_rts): New function.
	(df_visit_next): Renamed to df_visit_next_rc
	(df_analyse_1): Allocate/compute/free rts_order as well.
	(df_rd_global_compute): Use df_visit_next_rc instead of
	df_visit_next.
	(df_ru_global_compute): Use df_visit_next_rts instead of
	df_visit_next.

	* flow.c (flow_reverse_top_sort_order_compute): New function.

	* basic-block.h: Add prototype.

From-SVN: r45246

	* df.c (df_uses_record): Return after recording all uses
	in ASM_OPERANDS.

From-SVN: r45184

2001-08-26  Daniel Berlin  <dan@cgsoftware.com>

	* df.c (df_insn_modify): Realloc the INSN table here, if
	necessary, here, too.

From-SVN: r45183

	* Makefile.in, alias.c, basic-block.h, bb-reorder.c, bitmap.c,
	bitmap.h, builtin-types.def, builtins.c, builtins.def,
	c-aux-info.c, c-common.c, c-common.def, c-common.h,
	c-convert.c, c-decl.c, c-dump.c, c-dump.h, c-errors.c,
	c-format.c, c-lang.c, c-lex.c, c-lex.h, c-parse.in,
	c-pragma.c, c-pragma.h, c-semantics.c, c-tree.h, c-typeck.c,
	caller-save.c, calls.c, collect2.c, collect2.h, combine.c,
	conditions.h, config.gcc, configure.frag, configure.in,
	conflict.c, convert.c, convert.h, cppspec.c, crtstuff.c,
	cse.c, cselib.c, cselib.h, dbxout.c, dbxout.h, defaults.h,
	dependence.c, df.c, df.h, diagnostic.c, diagnostic.h,
	doloop.c, dominance.c, dwarf.h, dwarf2.h, dwarf2asm.c,
	dwarf2asm.h, dwarf2out.c, dwarf2out.h, dwarfout.c,
	emit-rtl.c, errors.c, errors.h, except.c, except.h,
	exgettext, explow.c, expmed.c, expr.c, expr.h, final.c,
	fixproto, flags.h, flow.c, fold-const.c, fp-test.c,
	function.c, function.h, gbl-ctors.h, gcc.c, gcc.h, gcc.hlp,
	gccspec.c, gcov-io.h, gcse.c, genattr.c, genattrtab.c,
	gencheck.c, gencodes.c, genconfig.c, genemit.c,
	genextract.c, genflags.c, gengenrtl.c, genmultilib,
	genopinit.c, genoutput.c, genpeep.c, genrecog.c,
	gensupport.c, gensupport.h, ggc-callbacks.c, ggc-common.c,
	ggc-none.c, ggc-page.c, ggc-simple.c, ggc.h, global.c,
	graph.c, graph.h, gthr-aix.h, gthr-dce.h, gthr-posix.h,
	gthr-rtems.h, gthr-single.h, gthr-solaris.h, gthr-vxworks.h,
	gthr-win32.h, gthr.h, haifa-sched.c, halfpic.c, halfpic.h,
	hard-reg-set.h, hwint.h, ifcvt.c, input.h, insn-addr.h,
	integrate.c, integrate.h, jump.c, lcm.c, libgcc2.c,
	libgcc2.h, lists.c, local-alloc.c, loop.c, loop.h,
	machmode.def, machmode.h, main.c, mbchar.c, mbchar.h,
	mips-tdump.c, mips-tfile.c, mklibgcc.in, mkmap-flat.awk,
	mkmap-symver.awk, optabs.c, output.h, params.c, params.def,
	params.h, predict.c, predict.def, predict.h, prefix.c,
	prefix.h, print-rtl.c, print-tree.c, profile.c, protoize.c,
	read-rtl.c, real.c, real.h, recog.c, recog.h, reg-stack.c,
	regclass.c, regmove.c, regrename.c, regs.h, reload.c,
	reload.h, reload1.c, reorg.c, resource.c, resource.h, rtl.c,
	rtl.def, rtl.h, rtlanal.c, sbitmap.c, sbitmap.h,
	sched-deps.c, sched-ebb.c, sched-int.h, sched-rgn.c,
	sched-vis.c, sdbout.c, sdbout.h, sibcall.c, simplify-rtx.c,
	ssa-ccp.c, ssa-dce.c, ssa.c, ssa.h, stmt.c, stor-layout.c,
	stringpool.c, system.h, timevar.c, timevar.def, timevar.h,
	tlink.c, toplev.c, toplev.h, tree.c, tree.def, tree.h,
	tsystem.h, unroll.c, unwind-dw2-fde.c, unwind-dw2-fde.h,
	unwind-dw2.c, unwind-pe.h, unwind-sjlj.c, unwind.h,
	unwind.inc, varasm.c, varray.c, varray.h, xcoffout.c,
	xcoffout.h: replace "GNU CC" with "GCC".

From-SVN: r45105

	* dbxout.c: Fix comment formatting.
	* dependence.c: Likewise.
	* df.c: Likewise.
	* diagnostic.c: Likewise.
	* dominance.c: Likewise.
	* doprint.c: Likewise.
	* dwarf2out.c: Likewise.
	* dwarfout.c: Likewise.
	* emit-rtl.c: Likewise.
	* except.c: Likewise.
	* explow.c: Likewise.
	* expmed.c: Likewise.
	* expr.c: Likewise.
	* flow.c: Likewise.
	* fold-const.c: Likewise.
	* function.c: Likewise.

From-SVN: r44729

	* alias.c (nonlocal_mentioned_p):
	Rename CONST_CALL_P to CONST_OR_PURE_CALL_P
	* calls.c (emit_call_1): Likewise.
	* cse.c (cse_insn, invalidate_skipped_block): Likewise.
	* cselib.c (cselib_process_insn): Likewise.
	* df.c (df_insns_modify): Likewise.
	* flow.c (need_fake_edge_p): Likewise.
	(propagate_one_insn): Likewise.
	* haifa-sched.c (reemit_notes): Likewise.
	* integrate.c (copy_insn_list): Likewise.
	* jump.c (delete_prior_computation): Likewise.
	* local-alloc.c (validate_equiv_mem): Likewise.
	* loop.c (scan_loop): Likewise.
	* predict.c (estimate_probability): Likewise.
	* reload.c (reload): Likewise.
	* sched-deps (sched_analyze): Likewise.
	* rtl.h (CONST_CALL_P): rename to CONST_OR_PURE_CALL_P.
	* gcse.c (compute_hash_table): Likewise.
	(mark_call): Likewise.
	(store_killed_in_insn): Likewise.

From-SVN: r44688

2001-07-29  Daniel Berlin  <dan@cgsoftware.com>

	* df.c (df_rd_global_compute): Add successors to worklist, not
	current item.
	(df_ru_global_compute): Ditto for preds.

From-SVN: r44461

        * hard-reg-set.h (regs_invalidated_by_call): Declare.
        * regclass.c (regs_invalidated_by_call): Move from cse.c.
        (init_reg_sets_1): Move initialization from cse_main.
        * cse.c (regs_invalidated_by_call): Move to regclass.c.
        (cse_main): Move its initialization also.
        * df.c (df_insn_refs_record): Use regs_invalidated_by_call.
        * flow.c (propagate_one_insn): Likewise.
        * gcse.c (compute_hash_table): Likewise.
        (compute_kill_rd, compute_store_table): Likewise.
        * sched-deps.c (sched_analyze_1): Likewise.

From-SVN: r44053

        * ssa-ccp.c (first_phi_node): Remove.  Replace uses with calls to
        first_insn_after_basic_block_note instead.

        * df.c (df_bb_refs_unlink): #if 0 out for now.

        * ssa.h: Add prototype for ssa_const_prop
        * ssa-ccp.c: Add prototype for ssa_fast_dce and mark_references
        (ssa_ccp_substitute_constants): Fix signed vs unsigned comparison
        (ssa_fast_dce): Remove unused variable

From-SVN: r43906

        * Makefile.in (OBJS): Add df.o
        (df.o): Add dependencies.
        * basic-block.h (flow_depth_first_order_compute): Declare.
        * flow.c (flow_depth_first_order_compute): No longer declare.
        Make external.
        * df.c, df.h: New files.
	* po/POTFILES.in: Update for new files.

From-SVN: r43647