Daily bump.

[gcc.git] / gcc / ChangeLog

2005-01-08  Eric Botcazou  <ebotcazou@libertysurf.fr>

	* configure.ac (DWARF-2 debug_line): Use objdump.
	* configure: Regenerate.

2005-01-08  Jeff Law  <law@redhat.com>
	    Diego Novillo  <dnovillo@redhat.com>

	PR tree-optimization/18241
	* tree-nrv.c (tree_nrv): Ignore volatile return values.
	* tree-ssa-dse.c (dse_optimize_stmt): Do not optimize
	statements with volatile operands.
	* tree-ssa-operands.c (add_stmt_operand): Do add volatile
	operands after marking a statement with has_volatile_ops.

2005-01-08  Roger Sayle  <roger@eyesopen.com>

	* tree.c (int_fits_type_p): Always honor integer constant
	TYPE_MIN_VALUE and TYPE_MAX_VALUE if they exist.

2005-01-08  Roger Sayle  <roger@eyesopen.com>

	* ifcvt.c (find_if_case_1): Reinstate 2005-01-04 change, now that
	the latent bug in rtl_delete_block has been resolved.

2005-01-08  Richard Sandiford  <rsandifo@redhat.com>

	* config/mips/t-iris6 (MULTILIB_DIRNAMES): Use -mabi argument values.
	(MULTILIB_OSDIRNAMES): Use the standard lib, lib32 and lib64.

2005-01-08  Richard Sandiford  <rsandifo@redhat.com>

	* config/mips/t-slibgcc-irix (SHLIB_LINK): Install a copy of the
	library as @multilib_dir@/$(SHLIB_SONAME).

2005-01-07  Eric Botcazou  <ebotcazou@libertysurf.fr>

	* configure.ac (HAVE_AS_OFFSETABLE_LO10): Fix typo.
	* configure: Regenerate.

2005-01-07  Jakub Jelinek  <jakub@redhat.com>

	* c-common.c (handle_mode_attribute): For ENUMERAL_TYPE, also copy
	TYPE_MODE.

2005-01-07  David Edelsohn  <edelsohn@gnu.org>

	PR target/13674
	* config/rs6000/rs6000.c (rs6000_legitimize_reload_address):
	Convert non-word aligned offset address using ld/std into
	indirect address.

2005-01-07  Richard Henderson  <rth@redhat.com>

	* config/i386/i386.md (sse_loadhps splitter): Fix operand number typo.

2005-01-07  Richard SAndiford  <rsandifo@redhat.com>

	* tree.h (IS_EXPR_CODE_CLASS): Use a straight-forward range check.

2005-01-07  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/19283
	* fold-const.c (fold_widened_comparison): Return NULL if shorter_type
	is not shorter than the original type.

	PR rtl-optimization/19012
	* config/i386/i386.md (addqi_1_slp): Set memory attribute.

	PR rtl-optimization/18861
	* cfgbuild.c (BLOCK_USED_BY_TABLEJUMP): Define.
	(FULL_STATE): Define.
	(mark_tablejump_edge): New function.
	(purge_dead_tablejump_edges): New function.
	(find_bb_boundaries): Use it.

	PR tree-optimization/18828
	* builtins.c (expand_builtin_next_arg): Remove argument and all
	the argument checking.
	(expand_builtin): Adjust caller.
	(expand_builtin_va_start): Likewise.  Remove error for too many
	arguments.
	(fold_builtin_next_arg): Issue error for too many arguments.
	After checking arguments, replace them with magic arguments that
	prevent further checking of the args.

2005-01-06  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

	* pa64-hpux.h (STARTFILE_SPEC): Fix typo in spec.

2005-01-06  Roger Sayle  <roger@eyesopen.com>

	PR target/6077
	* gcc.c (input_suffix_matches): Tweak the semantics of %{.s:...}
	and %{.S:...} (and their negative variants) to test whether the
	input file is assembler or pre-processed-assembler independent of
	the actual filename extension.

2005-01-06  Roger Sayle  <roger@eyesopen.com>

	* simplify-rtx.c (simplify_subreg): Simplify truncations of shifts
	of sign or zero extended values.

2005-01-06  Geoffrey Keating  <geoffk@apple.com>

	* c-cppbuiltin.c (builtin_define_float_constants): Set __*_EPSILON__
	for IBM long double format correctly.

2005-01-06  Daniel Berlin <dberlin@dberlin.org>
	
	Fix PR tree-optimization/18792

	* tree-data-ref.c (build_classic_dist_vector): Change first_loop
	to first_loop_depth, and use loop depth instead of loop number.
	(build_classic_dir_vector): Ditto.
	(compute_data_dependences_for_loop): Use depth, not loop number.
	* tree-loop-linear.c (try_interchange_loops): Use loop depth, not loop 
	number. Pass in loops, instead of loop numbers.
	(gather_interchange_stats): Ditto.
	(linear_transform_loops): Ditto.

2005-01-06  Richard Sandiford  <rsandifo@redhat.com>

	PR rtl-opt/13299
	* loop.c (get_monotonic_increment, biased_biv_fits_mode_p,
	biv_fits_mode_p, extension_within_bounds_p): New functions.
	(check_ext_dependent_givs): Use them.

2005-01-06  Roger Sayle  <roger@eyesopen.com>

	* cfgrtl.c (rtl_delete_block): A basic block may be followed by
	more than one barrier, in which case we should delete them all.

2005-01-06  Tobias Schlueter  <tobias.schlueter@physik.uni-muenchen.de>

	* gcc.c (process_command): Change year in 'gcc --version' to 2005.

2005-01-05  Daniel Berlin  <dberlin@dberlin.org>
	
	Fix PR middle-end/19286
	Fix PR debug/19267
	* dwarf2out.c (gen_subprogram_die): If we've already tried to
	output this subprogram, simply ignore this attempt to do it again.
	(add_abstract_origin_attribute): Don't abort trying to add the abstract
	origin attribute if it's not possible.
	(gen_block_die): Don't ignore subblocks of "unused" blocks.
	(decls_for_scope): Ditto.
	* gimple-low.c (mark_blocks_with_used_subblocks): Remove.
	(mark_used_blocks): Don't call mark_blocks_with_used_subblocks.
	
2005-01-05  Richard Henderson  <rth@redhat.com>

	PR target/11327
	* config/i386/i386.c (BUILTIN_DESC_SWAP_OPERANDS): New.
	(bdesc_2arg): Use it.
	(ix86_expand_binop_builtin): Force operands into registers
	when optimizing.
	(ix86_expand_unop_builtin, ix86_expand_unop1_builtin,
	ix86_expand_sse_compare, ix86_expand_sse_comi, 
	ix86_expand_builtin): Likewise.

2005-01-05  Richard Henderson  <rth@redhat.com>

	* config/ia64/ia64.c (rtx_needs_barrier): Handle CONST_VECTOR
	and VEC_SELECT.
	* config/ia64/vect.md (mulv8qi3): Re-implement with mix_[rl].
	(mulv4hi3): Set itanium_class mmmul.
	(fpack_sfxf, fpack_xfsf, fpack_xfxf): Remove.
	(fpack): Rename from fpack_sfsf.

2005-01-05  Richard Henderson  <rth@redhat.com>

	PR rtl-opt/10692
	* reload1.c (do_input_reload): Restrict the optimization deleteing
	a previous output reload to RELOAD_FOR_INPUT.

2005-01-05  Steven Bosscher  <stevenb@suse.de>

	* combine.c (expand_compound_operation)  <ZERO_EXTRACT>: Add
	comment that we fall through after case.
	(mark_used_regs_combine): Don't expect a SIGN_EXTRACT in a SET_DEST.
	(distribute_links): Likewise.
	* cse.c (cse_insn): Likewise.
	* cselib.c (cselib_invalidate_mem): Likewise.
	* df.c: Update comments at the top of the file.
	(read_modify_subreg_p): Update comments here too.
	(df_def_record_1): Don't expect a SIGN_EXTRACT in a SET_DEST.
	* flow.c (mark_set_1): Likewise.
	(mark_used_regs): Likewise.
	* gcse.c (mems_conflict_for_gcse_p): Likewise.
	(canon_list_insert): Likewise.
	(mark_set): Likewise.
	(try_replace_reg): Likewise.
	(store_killed_in_insn): Likewise.
	* loop.c (count_one_set): Likewise.
	(basic_induction_var): Likewise.
	* postreload-gcse.c (find_mem_conflicts): Likewise.
	* postreload.c (reload_combine_note_store): Likewise.
	(move2add_note_store): Likewise.
	* reload.c (find_equiv_reg): Likewise.
	(mark_referenced_resources): Likewise.
	* rtlanal.c (set_noop_p): Likewise.
	(note_stores): Likewise.
	(note_uses): Likewise.
	* sched-deps.c (sched_analyze_1): Likewise.
	* sched-rgn.c (check_live_1): Likewise.
	(update_live_1): Likewise.
	* config/i860/i860.c: Likewise.

	* rtl.dec (SIGN_EXTRACT): Document that this cannot appear as
	an lvalue.
	(ZERO_EXTRACT): Mention that this one can be an lvalue.

	* doc/rtl.texi: Update documentation for bit-fields and SET.

2005-01-05  Roger Sayle  <roger@eyesopen.com>

	* ifcvt.c (find_if_case_1): Revert 2005-01-04 change.

2005-01-05  Jan Hubicka  <jh@suse.cz>
	    Richard Henderson  <rth@redhat.com>

	PR target/18910
	* config/i386/i386.c (ix86_expand_move): Handle tls symbols 
	with an offset.

2005-01-05  Richard Henderson  <rth@redhat.com>

	PR target/12902
	* config/i386/i386.md (sse_movhps, sse_movlps): Remove.
	(sse_shufps): Change operand 3 to const_int_operand.
	(sse2_storelps): Fix typo in template.
	(sse_storehps, sse_loadhps, sse_storelps, sse_loadlps): New.
	* config/i386/i386.c (ix86_expand_vector_move_misalign): Use them.
	(ix86_expand_builtin): Likewise.

2005-01-05  Julian Brown  <julian@codesourcery.com>

	* config/arm/arm.c (arm_return_in_memory): Treat complex types
	as aggregates for AAPCS ABIs.

2005-01-05  Stan Shebs  <shebs@apple.com>

	* unwind-dw2-fde-darwin.c (examine_objects): Use 64-bit
	Mach-O getters if ppc64.
	* config/darwin.c (darwin_asm_output_dwarf_delta): Obey
	size argument.
	* config/darwin.h (ASM_PREFERRED_EH_DATA_FORMAT): Use
	signed four-byte field for global code case.
	(STARTFILE_SPEC): Avoid crt2.o for 64-bit compilation.

2005-01-05  Roger Sayle  <roger@eyesopen.com>

	PR middle-end/19100
	* c-common.c: Include real.h.
	(c_common_truthvalue_conversion): Avoid destructively modifying expr.
	Correctly handle TREE_CONSTANT_OVERFLOW for INTEGER_CST.
	Correctly handle TREE_CONSTANT_OVERFLOW and NaNs for REAL_CST.
	* Makefile.in (c-common.o): Update dependencies.

2005-01-05  Joseph S. Myers  <joseph@codesourcery.com>

	* c-parse.in (asm_string): Add trailing semicolon.

2005-01-05  Joseph S. Myers  <joseph@codesourcery.com>

	* c-parse.in (asm_string): New.  Don't allow wide strings in
	'asm'.
	(simple_asm_expr, asm_argument, asm_operand, asm_clobbers): Use
	asm_string instead of STRING.

2005-01-05  Joseph S. Myers  <joseph@codesourcery.com>

	* c-typeck.c (constructor_no_implicit): Remove.
	(set_designator, process_init_element): Don't check
	constructor_no_implicit.

2005-01-05  J"orn Rennecke <joern.rennecke@st.com>
	    Kaz Kojima  <kkojima@gcc.gnu.org>

	PR target/16482
	* lcm.c (create_pre_exit): New.
	(optimize_mode_switching): In MODE_ENTRY / MODE_EXIT case, set
	ENTRY_EXIT_EXTRA to 3.  Use create_pre_exit.

2004-01-05  Richard Earnshaw  <rearnsha@arm.com>

	* arm.h (TARGET_OPTIONS): Correctly record -mhard-float and
	-msoft-float in target_float_switch.
	* arm.c (arm_override_options): Fix processing of target_float_switch.

2004-01-05  Richard Earnshaw  <rearnsha@arm.com>

	* arm/vfp.md (arm_movsi_vfp): Hide VFP register classes from register
	preferencing.

2004-01-05  Uros Bizjak  <uros@kss-loka.si>

	* doc/invoke.texi (Intel 386 and AMD x86-64 Options):
        Replace i387 with 'i386 compiler' in -mfpmath=sse option.

2005-01-04  Roger Sayle  <roger@eyesopen.com>

	* ifcvt.c (find_if_case_1): Avoid creating an empty forwarder block,
	if deleting the then-block allows the test-block to fallthru to the
	else-block.

2005-01-04  Andrew Pinski  <pinskia@physics.uc.edu>

	PR c/19152
	* c-decl.c (diagnose_mismatched_decls): Accept "extern inline" declared
	after the full declaration if the are in two different TUs.

2005-01-04  Richard Henderson  <rth@redhat.com>

	PR tree-opt/19158
	* tree-sra.c (generate_one_element_init): Just
	call gimplify_and_add.
	(generate_element_init): Record the
	new referenced variables and mark them for renaming
	and split out to ...
	(generate_element_init_1): This.
	(scalarize_init): Don't call push_gimplify_context/
	pop_gimplify_context.

2005-01-04  Geoffrey Keating  <geoffk@apple.com>

	* toplev.c (get_src_pwd): Handle failure of getpwd().

2005-01-04  Roger Sayle  <roger@eyesopen.com>

	* fold-const.c (fold_single_bit_test): Delete unreachable handling
	of TRUTH_NOT_EXPR.
	(fold): Don't call fold_single_bit_test with a TRUTH_NOT_EXPR, as
	all the cases handled by it are inverted by invert_truthvalue.

2005-01-04  Eric Botcazou  <ebotcazou@libertysurf.fr>

	* config/sparc/sparc.md (save_register_windowdi): Add missing mode.
	(save_register_windowsi): Likewise.

2005-01-04  Richard Henderson  <rth@redhat.com>

	* tree-mudflap.c (mf_varname_tree): Fix thinko setting declname.

2005-01-04  Uros Bizjak  <uros@kss-loka.si>

	PR middle-end/17767
	* cse.c (fold_rtx) [RTX_COMPARE, RTX_COMM_COMPARE]: Don't attempt
	any simplifications of vector mode comparison operators.
	* simplify-rtx.c (simplify_relational_operation): Fix variable name.

2005-01-04  Paolo Bonzini  <bonzini@gnu.org>
	    Devang Patel  <dpatel@apple.com>

	PR tree-optimization/18308
	* tree-if-conv.c (add_to_dst_predicate_list): Gimplify
	the operands before creating a new expression.
	* dojump.c (do_jump): Make drop_through_label available
	for all cases.  Add expansion of COND_EXPR.

2005-01-04  Ira Rosen  <irar@il.ibm.com>

	* tree-vectorizer.c (vect_analyze_offset_expr): Test for
	INTEGER_CST instead of TREE_CONSTANT.
	(vect_gen_niters_for_prolog_loop): Test for INTEGER_CST
	instead of TREE_CONSTANT.
	(vect_analyze_pointer_ref_access): Test for INTEGER_CST
	instead of TREE_CONSTANT.

2005-01-04  Eric Botcazou  <ebotcazou@libertysurf.fr>

	* tree-eh.c (replace_goto_queue): Return early if the queue is empty.

2005-01-04  Uros Bizjak  <uros@kss-loka.si>

	PR target/19240
	* config/i386/i386.md (*fop_df_1_i387): Disable for TARGET_SSE_MATH.
	(*fop_df_1_i387): Disable for (TARGET_SSE2 && TARGET_SSE_MATH).

2005-01-03  Richard Henderson  <rth@redhat.com>

	* fold-const.c (force_fit_type): Cope with types larger than 2 HWI.
	(fold_convert_const_int_from_int, fold_convert_const_int_from_real,
	fold_convert_const_real_from_real): Split out from ...
	(fold_convert_const): ... here.

2005-01-03  Richard Henderson  <rth@redhat.com>

	PR target/19235
	* config/i386/i386.md (movdi_2): Separate SSE1 and SSE2 alternatives.
	(mov<MMXMODEI>_internal): Likewise.
	(movdf_nointeger): Prefer Y while not preferring, but allowing, x.
	Add V2SF case; use it for SSE1; don't use TI.
	(movdf_integer): Likewise.
	(mov<SSEMODEI>_internal, movti_internal): Force V4SF for SSE1.

2005-01-03  Ira Rosen  <irar@il.ibm.com>

	* tree-vectorizer.c (vect_strip_conversions): New function.
	(vect_analyze_offset_expr): Call vect_strip_conversions. Add
	check for binary class.	

2005-01-03  Daniel Berlin  <dberlin@dberlin.org>

	Fix PR debug/17924
	Fix PR debug/19191
	* dwarf2out.c (block_ultimate_origin): Follow decl origin if origin
	is a decl.
	* gimple-low.c (mark_blocks_with_used_vars): New function.
	(mark_blocks_with_used_subblocks): Ditto.
	(mark_used_blocks): Ditto.
	(pass_mark_used_blocks): New pass.
	* tree-inline.c: Include debug.h.
	(expand_call_inline): Call outlining_inline_function here.
	* tree-optimize.c (init_tree_optimization_passes): Add
	pass_mark_used_blocks. 
	* tree-pass.h (pass_mark_used_blocks): New.
	* Makefile.in (tree-inline.o): Add debug.h dependency.

2005-01-03  Geoffrey Keating  <geoffk@apple.com>

	* config/darwin.c (darwin_handle_weak_import_attribute): Permit
	VAR_DECLs to have weak_import attribute.

	* config/rs6000/darwin-fallback.c: Use 'ucontext_t' rather than
	'struct ucontext'.

2004-01-03  Steven Bosscher  <stevenb@suse.de>

	* passes.c (rest_of_compilation): Don't run regmove if only
	flag_expensive_optimizations, require flag_regmove instead.

2005-01-03  Eric Botcazou  <ebotcazou@libertysurf.fr>

	* config/sparc/litecoff.h (TARGET_OS_CPP_BUILTINS): Do not
	register "sparc".
	* config/sparc/sysv4-only.h (TARGET_OS_CPP_BUILTINS): Likewise.
	* config/sparc/rtemself.h (TARGET_SUB_OS_CPP_BUILTINS): Likewise.
	* config/sparc/sol2-64.h (TARGET_SUB_OS_CPP_BUILTINS): Delete.
	* config/sparc/sp64-elf.h (TARGET_SUB_OS_CPP_BUILTINS): Likewise.

2005-01-03  Richard Henderson  <rth@redhat.com>

	* config/ia64/ia64.c (TARGET_VECTOR_MODE_SUPPORTED_P): New.
	(ia64_const_ok_for_letter_p): New.
	(ia64_const_double_ok_for_letter_p): New.
	(ia64_extra_constraint): New.
	(ia64_expand_vecint_compare): New.
	(ia64_expand_vcondu_v2si): New.
	(ia64_expand_vecint_cmov): New.
	(ia64_expand_vecint_minmax): New.
	(ia64_print_operand): Add 'v'.
	(ia64_preferred_reload_class): New.
	(ia64_vector_mode_supported_p): New.
	* config/ia64/ia64.h (UNITS_PER_SIMD_WORD): New.
	(PREFERRED_RELOAD_CLASS): Move to function.
	(CONST_OK_FOR_LETTER_P): Move to function.
	(CONST_DOUBLE_OK_FOR_LETTER_P): Move to function.
	(CONSTRAINT_OK_FOR_Q, CONSTRAINT_OK_FOR_R): Remove.
	(CONSTRAINT_OK_FOR_S, CONSTRAINT_OK_FOR_T): Remove.
	(EXTRA_CONSTRAINT): Move to function.
	* config/ia64/ia64.md: Include vect.md.
	(itanium_class): Add mmalua.
	(type): Handle it.
	* config/ia64/itanium1.md (1_mmalua): New.  Add it to bypasses.
	(1b_mmalua): New.
	* config/ia64/itanium2.md (2_mmalua, 2b_mmalua): Similarly.
	* config/ia64/predicates.md (gr_reg_or_0_operand): Accept any
	CONST0_RTX.
	(const_int_2bit_operand): New.
	(fr_reg_or_0_operand): New.
	* config/ia64/ia64-modes.def: Add vector modes.
	* config/ia64/ia64-protos.h: Update.
	* config/ia64/vect.md: New file.

2005-01-03  Richard Henderson  <rth@redhat.com>

	* simplify-rtx.c (simplify_binary_operation): Handle VEC_CONCAT.

2005-01-03  Uros Bizjak  <uros@kss-loka.si>

	PR target/19236
	* config/i386/i386.c (log1psf2): Change mode of operands[0,1]
	to SFmode.
	(log1pdf2): Change mode of operands[0,1] to DFmode.

2005-01-03  Eric Botcazou  <ebotcazou@libertysurf.fr>

	* config/sparc/sparc.h (SPARC_RELAXED_ORDERING): Define to false.
	* config/sparc/linux.h (SPARC_RELAXED_ORDERING): Define to true.
	* config/sparc/linux64.h (SPARC_RELAXED_ORDERING): Likewise.
	* config/sparc/sparc.c (TARGET_RELAXED_ORDERING): Define to
	SPARC_RELAXED_ORDERING.

2005-01-03  Richard Henderson  <rth@redhat.com>
	    Uros Bizjak  <uros@kss-loka.si>

	PR target/14631
	* config/i386/i386.c (ix86_expand_builtin): [IX86_BUILTIN_PINSRW,
	IX86_BUILTIN_PINSRW128]: Fix wrong selector range in error message.
	* config/i386/i386.md (mmx_pinsrw, sse2_pinsrw): Fix selector
	handling.
	(*mmx_pinsrw, *sse2_pinsrw): New patterns.
	* config/i386/i386/predicates.md (const_pow2_1_to_8_operand,
	const_pow2_1_to_128_operand): New predicates.

2005-01-02  Greg McGary  <greg@mcgary.org>

	* tree-mudflap.c (mf_varname_tree): decl_printable_name handles
	anonymous decls.
	(mf_xform_derefs_1) [RESULT_DECL, STRING_CST]: Handle as innermost
	object.  [ptr_type]: Remove unused variable.
	Remember nearest addressable array-element or record-component
	when checking bitfield components.  Tolerate empty BIND_EXPR.

2005-01-01  Richard Henderson  <rth@redhat.com>

	* tree-vectorizer.c (vect_analyze_offset_expr): Strip conversions
	that don't narrow the value.  Fail for other conversions.

2005-01-01  Richard Henderson  <rth@redhat.com>

	PR c/19031
	* c-decl.c (pop_file_scope): Call maybe_apply_pending_pragma_weaks.
	* c-lang.c (finish_file): Don't do it here.
	* objc/objc-act.c (objc_finish_file): Likewise.

	* cgraph.c (decl_assembler_name_equal): New.
	(cgraph_node_for_asm, cgraph_varpool_node_for_asm): New.
	(cgraph_varpool_node): Actually link up cgraph_varpool_nodes.
	* cgraph.h (struct cgraph_varpool_node): Add next.
	(cgraph_node_for_asm, cgraph_varpool_node_for_asm): Declare.
	* varasm.c (assemble_alias): Mark the target as needed.

2005-01-01  Andrew Pinski  <pinskia@physics.uc.edu>

	PR middle-end/19221
	* function.c (get_arg_pointer_save_area): Use entry_of_function
	instead of get_insns.

2005-01-01  Roger Sayle  <roger@eyesopen.com>
	    Andrew Pinski  <pinskia@physics.uc.edu>
	    James E. Wilson  <wilson@specifixinc.com>

	PR rtl-optimization/12092
	* loop.c (emit_prefetch_instructions): Do nothing if PREFETCH_BLOCK
	is zero.

2005-01-01  Roger Sayle  <roger@eyesopen.com>
	    Olivier Hainque  <hainque@act-europe.fr>

	* tree.c (int_fits_type_p): A narrower type always fits in a
	wider one, except for negative values into unsigned types.

2005-01-01  Roger Sayle  <roger@eyesopen.com>

	* tree.c (int_fits_type_p): Compare the result of force_fit_type
	with the original constant rather than require TREE_OVERFLOW.

2005-01-01  Steven Bosscher  <stevenb@suse.de>

	PR middle-end/17544
	* c-decl.c (finish_function): If compiling C99, annotate the
	compiler generated return with the current file name and line 0.
	* tree-cfg.c (remove_useless_stmts_warn_notreached): Only warn if
	the source line is greater than 0.
	(remove_bb): Likewise.

See ChangeLog.12 for earlier changes.