[multiple changes]

[gcc.git] / gcc / ChangeLog

Thu Oct 29 14:10:22 EST 1998  Andrew MacLeod  <amacleod@cygnus.com>

	* except.c (emit_eh_context): Make the EH context register stay alive
	at -O0 so stupid.c doesn't get confused.

1998-10-29 Herman A.J. ten Brugge <Haj.Ten.Brugge@net.HCC.nl>

	* emit-rtl.c (try_split): Do not try to split a BARRIER.

Thu Oct 29 01:33:54 1998  Jan Hubicka <hubicka@freesoft.cz>
			  Jeffrey A Law  (law@cygnus.com)

	* i386.md: Change ix86_cpu == PROCESSOR_PENTIUM to TARGET_PENTIUM
	(zero_extendsidi2): Use # in output template and handle completely by
	splits.
	(zero_extend splitters): New define_splits.
	(ashiftrt_32): New pattern.

Wed Oct 28 22:58:35 1998  Jason Merrill  <jason@yorick.cygnus.com>

	* tree.c (append_random_chars): New fn.
	(get_file_function_name_long): Use it.

Wed Oct 28 22:27:05 1998  Richard Henderson  <rth@cygnus.com>

	* Makefile.in (cc1): Put C_OBJS, and thence @extra_c_objs@ last.
	(LIBCPP_OBJS): New.  Add cppulp.o.
	(cppmain, fix-header): Depend on and use libcpp.a.
	* configure.in (extra_c_objs, extra_cxx_objs): Use libcpp.a instead
	of the individual object files.
	* objc/Make-lang.in (cc1obj): Put OBJC_OBJS, and thence @extra_c_objs@,
	last.

	* cccp.c (user_label_prefix): New.
	(main): Set it off -f*leading-underscore.
	(special_symbol): Use it.
	* cpplib.c (special_symbol): Likewise.
	(cpp_handle_option): Handle -f*leading-underscore.
	* cppulp.c: New file.

	* output.h (user_label_prefix): Declare it.
	* dwarf2out.c (ASM_NAME_TO_STRING): Prepend user_label_prefix.
	* toplev.c (f_options, main): Handle -f*leading-underscore.

	* defaults.h (ASM_OUTPUT_LABELREF): Use asm_fprintf instead of
	referencing USER_LABEL_PREFIX directly.
	* config/nextstep.h (ASM_OUTPUT_LABELREF): Likewise.
	* m32r/m32r.h (ASM_OUTPUT_LABELREF): Likewise.
	* final.c (asm_fprintf): Use user_label_prefix instead.
	* arm/thumb.c (thumb_print_operand): Likewise.

	* gcc.c (default_compilers): Pass -f*leading-underscore on to
	cpp wherever appropriate.

Wed Oct 28 23:09:25 1998  Robert Lipe  <robertl@dgii.com>

	* sco5.h (SUBTARGET_SWITCHES): Add documentation for OpenServer-
	specific compiler switches.

Wed Oct 28 21:05:53 1998  Jeffrey A Law  (law@cygnus.com)

	* Makefile.in (c-common.o): Depend on c-pragma.h.  Use $(RTL_H) instead
	of rtl.h.

Wed Oct 28 20:52:47 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>

	* gcc.c (EXTRA_SPECS, extra_specs): Introduce an intermediate
 	structure which has exactly the members provided by EXTRA_SPECS.
  	Xmalloc() the real `extra_specs', and initialize it from this
	intermediate structure.

	* alpha.h (EXTRA_SPECS): Revert change for missing initializers.

	* mips.h  (EXTRA_SPECS): Likewise.

	* sparc.h (EXTRA_SPECS): Likewise.

Wed Oct 28 16:46:07 1998  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de>
    
	* function.c (purge_addressof_1): Instead of aborting when a
	bitfield insertion as a replacement for (MEM (ADDRESSOF)) does not
	work just put the ADDRESSOF on stack.  Otherwise remember all such
	successfull replacements, so that exactly the same replacements
	can be made on the REG_NOTEs.  Remove the special case for CALL
	insns again.
	(purge_addressof_replacements): New variable.
	(purge_addressof): Clear it at end.

1998-10-28 16:10 -0500	Zack Weinberg  <zack@rabi.phys.columbia.edu>

	 * c-lang.c: Declare extern char *yy_cur if USE_CPPLIB.
	   (lang_init): Call check_newline always.
	 * c-lex.c (init_parse) [USE_CPPLIB=1]: After calling
	   cpp_start_read, set yy_cur and yy_lim to read from
	   parse_in.token_buffer, so that we'll see the first #line
	   directive.
	 * cpplib.c (cpp_start_read): finclude the main input file
	   before processing -include/-imacros.	 Process -imacros and
	   -include separately, and handle -include by stacking a
	   buffer for the file in question as if it'd been #included.
	 * toplev.c (documented_lang_options) Recognize -H when
	   USE_CPPLIB is on.

1998-10-28 16:09 -0500	Zack Weinberg  <zack@rabi.phys.columbia.edu>

	 * cpplib.c: Merge do_once into do_pragma.  Break file handling
	   code out of do_include.
	   Move append_include_chain, deps_output,
	   file_cleanup, redundant_include_p, import_hash,
	   lookup_import, add_import, read_filename_string, read_name_map,
	   open_include_file, finclude, safe_read to cppfiles.c.
	   Move prototypes for deps_output, append_include_chain,
	   finclude to cpplib.h.  Move definition of struct
	   file_name_list there also.

	 * cppfiles.c: New file.  Contains all the above functions
	   broken out of cpplib.c; also hack_vms_include_specification
	   from cccp.c and find_include_file, a new function broken out of
	   do_include.

	 * Makefile.in (cppmain): Depend on cppfiles.o.
	   (fix-header): Likewise.
	   (cppfiles.o): New target.
	 * configure.in (--enable-c-cpplib): Add cppfiles.o to
	   extra_c_objs.  Add ../cppfiles.o to extra_cxx_objs.

Wed Oct 28 14:06:49 1998  Jim Wilson  <wilson@cygnus.com>

	* dwarfout.c (dwarfout_file_scope_decl): If DECL_CONTEXT, don't abort
	if pending_types is non-zero.
	(dwarfout_finish): Verify pending_types is zero before finishing.

Wed Oct 28 10:29:09 1998  Nick Clifton  <nickc@cygnus.com>

	* expr.c (convert_move): Use shifts to perform the move if a
	suitable extend pattern cannot be found.  Code written by
	Richard Henderson <rth@cygnus.com>.

Wed Oct 28 03:59:29 1998  Bernd Schmidt <crux@pool.informatik.rwth-aachen.de>

	* regclass.c (renumber, regno_allocated): New static variables, moved
	out of allocate_reg_info.
	(allocate_reg_info): Move these two variables outside the function.
	Move code to free memory into new function free_reg_info.
	(free_reg_info): New function, broken out of allocate_reg_info.
	* toplev.c (compile_file): Call free_reg_info, not allocate_reg_info.
	* rtl.h (allocate_reg_info): Don't declare.
	(free_reg_info): Declare.

	* final.c (cleanup_subreg_operands):  ASM_INPUTs need no treatment.

Wed Oct 28 02:38:12 1998  Jason Merrill  <jason@yorick.cygnus.com>

	* toplev.c (compile_file): Temporarily revert last change.

Wed Oct 28 00:00:35 1998  Jason Merrill  <jason@yorick.cygnus.com>

	* c-typeck.c (convert_for_assignment): Parenthesize.

1998-10-28  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de>

	* reload1.c (delete_output_reload): Avoid ambigous else.

Wed Oct 28 00:10:35 1998  Jeffrey A Law  (law@cygnus.com)

	* toplev.c (compile_file): Call allocate_reg_info to free register
	table memory.
	* rtl.h (allocate_reg_info): Declare.

	* PROJECTS: Remove entry for local spilling.

	* final.c (cleanup_subreg_operands): New function.
	(final_scan_insn): Use it.
	(alter_subreg): Clear the "used" field when we turn a SUBREG into
	a REG.
	* reload1.c (reload): Delete CLOBBER insns and also cleanup SUBREG
	operands when reload has finished.
	* reload.h (cleanup_subreg_operands): Declare..
	* flow.c (life_analysis_1): No longer delete CLOBBER insns after
	reload.  Handled in reload itself.

Tue Oct 27 23:32:34 1998  Bernd Schmidt <crux@pool.informatik.rwth-aachen.de>

	* reload1.c (verify_initial_offsets): New function.
	(reload): Call it after reload_as_needed.  Also verify that the frame
	size stays constant during reload_as_needed.
	* i386.h (CONST_DOUBLE_OK_FOR_LETTER_P): Undo Jul 26 change.

	* reload.h (struct insn_chain): Add need_operand_change element.
	* reload1.c (new_insn_chain): Clear it.
	(calculate_needs_all_insns): Set it; don't overload need_reload.
	(reload_as_needed): Use it.

	* reload.c (find_reloads_address): Use BASE_REG_CLASS instead of
	reload_address_base_reg_class throughout.  Similar for INDEX_REG_CLASS
	and reload_address_index_reg_class.
	(find_reloads_address_1): Likewise.
	* reload.h (reload_address_base_reg_class,
	reload_address_index_reg_class): Don't declare.
	* reload1.c (reg_old_renumber, pseudo_previous_regs,
	pseudo_forbidden_regs, bad_spill_regs_global): New static variables.
	(used_spill_regs): Now static.
	(reload_address_base_reg_class, reload_address_index_reg_class,
	regs_explicitly_used, counted_for_groups, counted_for_nongroups,
	basic_block_needs, max_needs, group_size, group_mode, max_groups,
	max_nongroups, max_needs_insn, max_groups_insn, max_nongroups_insn,
	forbidden_regs):
	Deleted variables.
	(init_reload): Delete code to compute base/index reg classes.
	(reload): Delete variable J.
	Delete code to manage basic_block_needs.
	Don't compute regs_explicitly_used.
	Allocate, initialize and free reg_old_renumber, pseudo_forbidden_regs,
	pseudo_previous_regs.
	Initialize bad_spill_regs_global.
	Don't call order_regs_for_reload here.
	Don't initialize spill_reg_order and n_spills.
	Don't forbid explicitly used regs to be used for spill regs.
	Change main loop to infinite loop, with explicit break statements.
	Make SOMETHING_CHANGED variable local to that loop.
	Don't initialize max_needs, max_groups, max_nongroups, max_needs_insn,
	max_groups_insn, max_nongroups_insn, group_size, group_mode.
	Make sure spilled_speudos is cleared before calling spill_hard_reg or
	new_spill_reg.
	Don't call dump_needs.
	Delete code to reset potential_reload_regs.
	Delete code to terminate loop conditional on the global needs variables
	showing no further needs.
	(calculate_needs_all_insns): Return void.  All callers changed.
	Initialize somehing_needs_elimination here, not in reload.
	Delete avoid_return_reg kludge.
	(calculate_needs): Lose AVOID_RETURN_REG and GLOBAL args, return void.
	All callers changed.
	Initialize the group_mode and group_size elements of the arg CHAIN.
	Delete code to manage basic_block_needs.
	Operate on elements of CHAIN instead of global variables.
	Delete avoid_return_reg kludge.
	(find_tworeg_group): Lose GLOBAL arg, take CHAIN arg, return void.
	All callers changed.
	Operate on elements of CHAIN instead of global variables.
	Delete special SMALL_REGISTER_CLASSES code.
	Delete spill_failure code; now in new_spill_reg.
	(find_group): Lose GLOBAL arg, take CHAIN arg, return void.
	All callers changed.
	Operate on elements of CHAIN instead of global variables.
	(maybe_mark_pseudo_spilled): New static function.
	(find_reload_regs): Lose GLOBAL arg, take CHAIN arg, return void.
	All callers changed.
	Operate on elements of CHAIN instead of global variables.
	Call order_regs_for_reload here, not in reload.
	Initialize spill_reg_order and n_spills.
	Simplify test whether an asm insn is involved.
	Delete spill_failure code; now in new_spill_reg.
	Call maybe_mark_pseudo_spilled for everything marked as live in
	CHAIN.  Merge CHAIN's used_spill_regs into the global variable
	used_spill_regs.
	(dump_needs): Take CHAIN arg.  No longer static, to prevent the
	compiler from optimizing this function (now unused) away.
	Operate on elements of CHAIN instead of global variables.
	(possible_group_p): Lose MAX_GROUPS arg, take CHAIN arg.  All callers
	changed.
	Operate on elements of CHAIN instead of global variables.
	(count_possible_groups): Lose GROUP_SIZE, GROUP_MODE, MAX_GROUPS args,
	take CHAIN arg.  All callers changed.
	Operate on elements of CHAIN instead of global variables.
	(new_spill_reg): Lose MAX_NEEDS, MAX_NONGROUPS, GLOBAL args, take
	CHAIN, NONGROUP args.  Return void.  All callers changed.
	Verify caller isn't trying to spill a pseudo.
	Simplify test for illegal reg, just use bad_spill_regs.
	Generate better error messages.
	Operate on elements of CHAIN instead of global variables.
	Mark spilled register in CHAIN's used_spill_regs element.
	Don't call spill_hard_reg.
	(spill_hard_reg): Lose GLOBAL arg, return void.  All callers changed.
	Mark spilled hard regs in bad_spill_regs_global.
	Mark affected pseudos in spilled_pseudos, but don't spill them.
	(ior_hard_reg_set): New static function.
	(finish_spills): Return int.  All callers changed.
	Compute spill_reg_order, n_spills and spill_regs here.  Also update
	regs_ever_live for regs used as spills.
	For every pseudo in spilled_pseudos, spill it and mark the previous
	hard reg it had in pseudo_previous_regs.  Compute which hard regs
	arseudo): New static function.
	(order_regs_for_reload): Take CHAIN arg.  All callers changed.
	Initialize bad_spill_regs from bad_spill_regs_global, then merge any
	hard registers explicitly used across the current insn into the set.
	Compute hard_reg_n_uses taking only pseudos live across this insn
	into account.
	Tweak sorting of potential_reload_regs.
	(compare_spill_regs): Delete function.
	(reload_as_needed): Don't sort the spill_regs array, it's computed
	in proper order in finish_spills.
	Delete avoid_return_reg kludge.
	Delete code to manage basic_block_needs.
	(allocate_reload_reg): Minor speed/readability tweaks.
	Operate on elements of CHAIN instead of global variables.
	(choose_reload_regs): Lose AVOID_RETURN_REG arg.  All callers changed.
	Delete avoid_return_reg kludge.
	Initialize reload_reg_used from CHAIN's used_spill_regs element.
	Delete unused label FAIL.
	(reload_combine): Replce reload_address_index_reg_class with
	INDEX_REGS.
	Don't use used_spill_regs to determine information about lifetime of
	hard regs.

Tue Oct 27 13:15:02 1998  Nick Clifton  <nickc@cygnus.com>
	
	* toplev.c (display_help): Ignore empty target specific
	options, and if -W is also specified on the command line then
	display undocumented options.

	* config/arm/arm.c: Updated with changes in devo sources.
	* config/arm/arm.h: Updated with changes in devo sources.
	* config/arm/lib1funcs.asm: Updated with changes in devo sources.
	* config/arm/lib1thumb.asm: Add ELF support.

Tue Oct 27 16:11:43 1998  David Edelsohn  <edelsohn@mhpcc.edu>
	
	* collect2.c (aix64_flag): New variable.
	(main, case 'b'): Parse it.
	(GCC_CHECK_HDR): object magic number must match mode.
	(scan_prog_file): Only check for shared object if valid header.
	Print debugging if header/mode mismatch.

Tue Oct 27 10:15:02 1998  Nick Clifton  <nickc@cygnus.com>

	Added support for arm-elf-linux configuration, submitted by Philip
	Blundell <pb@nexus.co.uk>, and integrated this with the arm-elf
	code developed by Catherine Moore <clm@cygnus.com>.  The following
	files are affected: 

	* configure.in: Add arm-*-linux-gnu, armv2-*-linux and arm-*-elf
	targets. 

	* configure: Regenerated.
	
	* config/arm/aout.h: Add default definitions of REGISTER_PREFIX,
	USER_LABEL_PREFIX and LOCAL_LABEL_PREFIX.  Make other macro
	definitions conditional on their not having been already defined.

	* config/arm/lin1funcs.asm: Add ELF only macros to generate .size
	and .type directives, and add "(PLT)" qualification to function
	calls.

	* config/arm/linux.h: Deleted.  This file is now superceeded by
	either linux-elf.h or linux-aout.h.

	* config/arm/linux-gas.h: Define `inhibit_libc' if cross-compiling.
	(CLEAR_INSN_CACHE): New macro, currently disabled (awaiting kernel
	support).
	Move definitions from old linux.h file here.
	
	* config/arm/elf.h: New file.  Generic ARM/ELF support.
	
	* config/arm/linux-aout.h: New file.  Support for Linux with a.out.
	
	* config/arm/linux-elf.h: New file.  Support for Linux with ELF.
	
	* config/arm/linux-elf26.h: New file.  Support for Linux with ELF
	using the 26bit APCS.
	
	* config/arm/unknown-elf.h: New file.  Support for OS'es other
	than Linux with ELF.

	* config/arm/t-arm-elf: New file.  makefile fragment for arm-elf
	builds.
	
	* config/arm/coff.h: Include aout.h for basic assembler macros.
	Add support for -mstructure_size_boundary=<n> command line option.
	
	* config/arm/arm.h: Add support for -mstructure_size_boundary=<n>
	command line option.  Make macro definitions conditional on their
	not having been already defined. 

	* config/arm/arm.c: Add support for -mstructure_size_boundary=<n>
	command line option.

	
Tue Oct 27 08:56:46 1998  Andrew MacLeod  <amacleod@cygnus.com>

	* dwarfout.c (ASM_OUTPUT_DWARF_STRING_NEWLINE): ASM_OUTPUT_DWARF_STRING
	has been changed to not include a newline. Use this macro instead.
	(output_enumeral_list, const_value_attribute, name_attribute,
	comp_dir_attribute, prototyped_attribute, producer_attribute,
	inline_attribute, pure_or_virtual_attribute, output_inheritance_die,
	dwarfout_file_scope_decl, generate_new_sfname_entry,
	generate_macinfo_entry, dwarfout_init, dwarfout_finish): Use
	ASM_OUTPUT_DWARF_STRING_NEWLINE macro.

Mon Oct 26 13:35:02 1998  Richard Henderson  <rth@cygnus.com>

	* combine.c (subst): Process the inputs to a parallel asm_operands
	only once.

Mon Oct 26 13:32:31 1998  Richard Henderson  <rth@cygnus.com>

	* stmt.c (expand_asm_operands): Accept `=' or `+' at any position.

Mon Oct 26 12:53:14 1998  Jeffrey A Law  (law@cygnus.com)

	* tm.texi (ASM_OUTPUT_MAX_SKIP_ALIGN): Document.

Mon Oct 26 00:36:58 PST 1998 Jeff Law  (law@cygnus.com)

	* version.c: Bump for snapshot.

Sun Oct 25 23:36:52 1998  Jason Merrill  <jason@yorick.cygnus.com>

	* stmt.c (expand_fixup): Set fixup->before_jump to a
	NOTE_INSN_DELETED instead of a NOTE_INSN_BLOCK_BEG.

Sun Oct 25 15:49:57 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>

	* Makefile.in (recog.o): Depend on toplev.h.
	(insn-emit.o): Depend on recog.h.
	(insn-peep.o): Depend on recog.h and insn-config.h.

	* combine.c (simplify_set): Remove unused variable `scratches'.

	* final.c (final_scan_insn): Wrap declaration of variables `vlen'
 	and `idx' in macro conditional controlling their use.

	* genemit.c (main): Make the generated output file include
 	recog.h.  Don't have it declare `insn_operand_constraint', since
 	we get it from recog.h.

	* genpeep.c (main): Make the generated output file include
	insn-config.h and recog.h.

	* recog.c: Include toplev.h.
	(extract_insn): Remove unused variable `p'.

	* regclass.c (fix_register): Add missing braces around initializer
	for `what_option'.
	(allocate_reg_info): Move variable `i' into the scope where it is
	used.  Change its type to `size_t'.

Sun Oct 25 13:10:15 1998  Bernd Schmidt <crux@pool.informatik.rwth-aachen.de>

	* reload.c (push_reload): When merging reloads, make sure
	that reload_in_reg and reload_in are from the same reload in
	all cases.

Sun Oct 25 12:07:00 1998  Mumit Khan  <khan@xraylith.wisc.edu>

	* i386/crtdll.h (CPP_PREDEFINES): Fix typo.
	* i386/mingw32.h (CPP_PREDEFINES): Likewise.

Fri Oct 23 23:42:03 1998  David Edelsohn  <edelsohn@mhpcc.edu>

	* loop.c (loop_has_tablejump): New variable.
	(prescan_loop): Scan for it.
	(insert_bct): Replace explicit scan with use of it.
	* regclass.c (regclass): Restore loop variable j.
	(record_reg_classes): Deterine op_types modifiers and initialize
	classes[i] before matching constraints.  Handle matching
	constraints 5-9.
	
Fri Oct 23 13:55:48 1998  Jim Wilson  <wilson@cygnus.com>

	* m32r/m32r.c (gen_split_move_double): Call alter_subreg.  Delete
	subreg support.

Fri Oct 23 16:19:24 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>

	* mips.h (EXTRA_SPECS): Add missing initializers.

Fri Oct 23 16:08:39 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>

	* sparc.h (EXTRA_SPECS): Add missing initializers.
	(sparc_defer_case_vector): Provide a prototype.

	* svr4.h (ASM_OUTPUT_ASCII): Cast STRING_LIMIT to (long) when
 	comparing it to the result of a pointer subtraction.

Fri Oct 23 15:34:14 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>

	* alpha.c (override_options): Use ISDIGIT(), not isdigit().  Cast
	the argument to (unsigned char).

	* alpha.h (EXTRA_SPECS): Add missing initializers.
	(ASM_GENERATE_INTERNAL_LABEL): Ensure the argument matches the
	format specifier.

Fri Oct 23 13:12:35 1998  Jeffrey A Law  (law@cygnus.com)

	* flow.c (life_analysis_1): Enable "rescan" code after reload.
	(propagate_block): Delete dead code after reload.

	* sched.c (update_flow_info): Revert Oct 19, 1998 change.  Brings
	back Oct 15, 1998 change.  
	* haifa-sched.c (update_flow_info): Likewise.
	* flow.c (life_analysis_1): Delete CLOBBER insns after reload.

	* mn10200.md (truncated shift): Accept constant inputs too.

Fri Oct 23 04:06:57 1998  Richard Earnshaw (rearnsha@arm.com)

	* machmode.h (mode_mask_array): No longer const.
	* rtl.c (init_rtl): Fully initialize it if EXTRA_CC_MODES defined.