changelog.3

早期freebsd实现

Tue Jul  9 22:21:22 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* loop.c (find_and_verify_loops): RETURN insns aren't listed in
	loop_number_exit_labels, so don't try to remove JUMP_LABEL of a
	RETURN from that list.

	* rtlanal.c (reg_referenced_between_p): New function.
	* jump.c (jump_optimize): Use it instead of reg_used_between_p when
	checking for "if (...) x = a; else x = b;" case.

Tue Jul  9 13:03:53 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* expr.c (move_block_to_reg): Don't force_const_mem on non-constant.

Tue Jul  9 09:13:32 1991  Tom Wood  (wood at dg-rtp.dg.com)

	* c-decl.c (finish_struct): Record tagged types as a TYPE_DECL
	with a NULL DECL_NAME.
	(finish_enum): Ditto.
	* cplus-decl.c (finish_enum): Ditto.
	* cplus-class.c (finish_struct): Ditto.

	* dbxout.c (dbxout_symbol): Ignore TYPE_DECLs for tagged types.
	* cplus-dbxout.c (dbxout_symbol): Ditto.
	* sdbout.c (sdbout_symbol): Ditto.

	* toplev.c (compile_file): DECL_NAME may be null.

	* dwarfout.c (output_symbol): Use output_dies_for_tagged_type for
	TYPE_DECLs of tagged types.
	(dwarfout_output_tagged_type): Deleted.
	(output_dies_for_tagged_type): Mark TREE_ASM_WRITTEN early.

Mon Jul  8 19:36:44 1991  Tom Wood  (wood at dg-rtp.dg.com)

	* jump.c (jump_optimize): Check for extra labels when detecting
	"if (...) x = a; else x = b;".  Include the insn for "x = a;" when
	testing for data conflict.

Mon Jul  8 19:34:14 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* integrate.c (copy_for_inline, case MEM): Must copy a MEM even if
	it has a constant address if that address involves a LABEL_REF.

	* rtlanal.c (reg_set_p): Only check for REG_INC notes and a CALL_INSN
	if we are passed an insn.
	* local-alloc.c (optimize_reg_copy): Remove tests now done in
	reg_set_p.

Mon Jul  8 16:38:49 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* c-parse.y (yylex): Pedantic warning here for `asm'.
	No warning for `__asm__'.
	(maybe_type_qual, maybeasm, extdef): No warning here.

	* objc-actions.c: Rename OBJC_SELS_R_INTS to OBJC_INT_SELECTORS.
	Rename OBJC_UNIQUE_SELS to OBJ_NONUNIQUE_SELECTORS, reversing sense.
	Eliminate OBJC_SELS_R_STRUCT_PTRS.

Mon Jul  8 06:37:00 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* rtlanal.c (reg_{used,set}_between_p): Allow FROM_INSN == TO_INSN;
	return 0 in that case.

	* jump.c (mark_jump_label): Fix typo in use of GET_RTX_LENGTH.

	* reload.c (reload_strict_low): Change comment to say that this is
	always zero; we don't use it any more.

Sun Jul  7 22:14:13 1991  Michael Meissner  ([e-mail])

	* tm-mips.h (FRAME_POINTER_REQUIRED): Fix typo that required a frame
	if alloca was not called, instead of the reverse.

Sun Jul  7 17:14:17 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* cccp.c (struct file_buf): New field system_header_p.
	Everything that pushes on instack now initializes this field.
	(finclude): New arg to set that field.  Callers changed.
	(do_include): Pass that arg as 1 for <...>, else 0.

	* cccp.c (do_include): Warn for first use of #import
	except in system header files.
	(handle_directive): Support #import if compiling for Next.

	* cccp.c (do_pragma): For #pragma once, warn it is obsolete.

Sun Jul  7 14:29:04 1991  James Van Artsdalen  (james at bigtex.cactus.org)

	* tm-att386.h (NO_DOLLAR_IN_LABEL): Define this here,
	* tm-i386sco.h (NO_DOLLAR_IN_LABEL):    not here.

Sun Jul  7 06:20:03 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* rtlanal.c (reg_set_p): Return 1 if REG is found in a REG_INC
	note or if INSN is a CALL_INSN and REG is a hard reg.
	(reg_set_last): Only return a register or constant; if returning a
	register, ensure it isn't modified between the SET we found and INSN.

	* jump.c (jump_optimize): If SMALL_REGISTER_CLASSES, don't make a
	store-flag insn if any register involved is a hard reg.

Sat Jul  6 14:51:15 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* expr.c (expand_assignment): Don't abort for volatile structure field
	even if the structure is in a register.
	NOTE: This leaves the problem of implementing whatever meaning
	a volatile field should actually have.

	* fold-const.c (div_and_round_double): Make lnum and lden unsigned.
	Use the small-denominator algorithm only for denom < 2**24.
	Fix backward conditionals in ?: operators in general case.
	Change i + j to i - 1 + j when indexing num.

Fri Jul  5 21:36:57 1991  Ken Raeburn  (raeburn at watch.com)

	* genpeep.c (match_rtx, case MATCH_OP_DUP): Output semicolon after
	"goto" statement.

Fri Jul  5 09:45:56 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* rs6000.md (andsi3): Bias alternatives so we always prefer constants.
	(define_splits of DImode, SFmode, and DFmode): Don't split
	unless after reload.
	(ashldi3, lshrdi3): Fix bugs in instruction order; use & in
	output constraint so can't conflict with operand 2; use '0'
	constraint to allow operands 0 and 1 to be the same register.

	* regclass.c (reg_n_sets): Move definition before use.

	* reorg.c (fill_simple_delay_slots): Candidate for delay slot cannot
	set anything set between it and the delay insn.

	* jump.c (jump_optimize): In "if (...) x = a; else x = b;", correctly
	specify range to check if X is used or set.
	Use rtx_equal_p to check for matching X.

Thu Jul  4 15:55:45 1991  Tom Wood  (wood at geech.gnu.ai.mit.edu)

	* cccp.c (default_include): Add /usr/mach/include for MACH systems.

	* configure (m88k-luna): Needs make-m88kluna.
	* make-m88kluna: New file.

	* dwarf.h: New file derived from the UNIX International
	Programming Languages Special Interest Group DWARF specification.
	* dwarfout.c (includes): Include "dwarf.h".
	(subscript_data_attribute): Use FMT_CODE to encode array subscripts.
	(languagribute): LANG type no longer provided by dwarf.h.
	(output_source_file_die): Determine proper language attribute.

Thu Jul  4 12:14:16 1991  James Van Artsdalen  (james at bigtex.cactus.org)

	* cplus-xref.c: define rindex if USG

Thu Jul  4 12:36:55 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* gcc.c (process_command): Correctly split -L from its arg.
	* SWITCHES_NEED_SPACES: New host machine option.
	This really ought to be defined now for certain hosts,
	but I don't know which ones they are.

Wed Jul  3 23:31:00 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* tm-m68k.h (ASM_OUTPUT_FLOAT): Check CROSS_COMPILE (there was a typo).

Wed Jul  3 22:05:55 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* cse.c (simplify_binary_operation, case MINUS): Fix typo in op number.

	* cse.c (cse_basic_block): Correctly handle the case where TO
	was a label with zero uses at the end of the function.

	* combine.c (significant_valid): New variable.
	(combine_instructions): Turn significant_valid off until after
	we finished computing reg_significant.
	(significant_bits): Ignore reg_significant when significant_valid
	is zero.

	* rtlanal.c (reg_set_last): Go past CALL_INSN as long as we are not
	looking for a hard register.

Wed Jul  3 21:07:18 1991  Jim Wilson  (wilson at wookumz.gnu.ai.mit.edu)

	* sched.c (schedule_block): When computing what registers are dead
	at the end of the current block, correctly handle REG_DEAD notes
	that refer to multi-word hard registers.

	* loop.c (mark_loop_jump): When invalidating loops with multiple
	entries, must invalidate every nested loop containing the target
	of a loop entry jump, except for those that also contain the jump
	itself.

	* loop.c (record_giv): When computing whether a giv is
	replaceable, check whether the biv update has a valid luid, and
	mark it as not replaceable if not.

	* combine.c (gen_rtx_combine): Call rtx_alloc instead of gen_rtx,
	because it is much faster, especially on some RISC machines.

	* fixincludes: Add optional argument which indicates where to put
	the fixed include files.  Echo the directory name where the
	include files will be put.

	* cccp.c (struct default_include): Don't examine
	STANDARD_INCLUDE_DIR or /usr/local/include when
	NO_STANDARD_INCLUDE_DIR is defined.  This is useful when building
	cross compilers. 
	(main): Only send SIGPIPE signal if the SIGPIPE signal exists on
	the host.
	(rescan, handle_directive, skip_if_group, validate_else,
	skip_to_end_of_comment, macarg1, discard_comments): Accept '//' as
	a comment in Objective-C as well as C++.  The Objective C language
	specifies that '//' starts a comment.

	* .gdbinit (ptn): Define new macro to print out the name of a type
	node.

	* stab.def: Correct errors in table for values of DSLINE and
	BSLINE.  Document the conflict between BROWS and BSLINE.  Document
	the value of the BROWS field.

Tue Jul  2 23:26:20 1991  Michael Meissner  (meissner at pogo.gnu.ai.mit.edu)

	* mips-tfile.c (toplevel): Add a comment explaining the MIPS ECOFF
	file format at the start of the file.

Tue Jul  2 14:00:39 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* c-typeck.c (build_array_ref): Report error here if the "array"
	is not an array or pointer.  Don't leave this for the PLUS_EXPR.

	* cccp.c: Inlcude containing file names/lines in error messages.
	(print_containing_files): New function.
	(error*, warning): Call it.
	(finclude): Increment input_file_stack_tick when file changes.

	* cccp.c: Include descrip.h.

Tue Jul  2 07:44:19 1991  Tom Wood  (wood at geech.gnu.ai.mit.edu)

	* tm-m88k.h (ASM_OUTPUT_SOURCE_LINE): Define only for SDB.
	* tm-m88kdgux.h (AS_BUG_*): Support these for now.

	* c-decl.c (finish_struct): Invoke dwarfout_output_tagged_type
	only when producing DWARF debugging info.
	* cplus-class.c (finish_struct): Ditto.

Mon Jul  1 23:03:34 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* toplev.c (compile_file): Close stack_reg_dump_file iff STACK_REGS.

Mon Jul  1 15:17:57 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* combine.c (set_significant): Ignore CLOBBERs.
	(simplify_and_const_int, case SUBREG): Only ignore paradoxical SUBREGs
	if BYTE_LOADS_ZERO_EXTEND.
	(record_value_for_reg): Fix typo; had I for REGNO.

Mon Jul  1 08:28:09 1991  Tom Wood  (wood at dg-rtp.dg.com)

	* final.c (output_source_line): Output DWARF line numbers.

	* dwarfout.c (dwarfout_output_tagged_type): New function.
	* c-decl.c (finish_struct): Call it.
	* cplus-class.c (finish_struct): Call it.

	* dwarfout.c (includes): Need insn-config.h and reload.h.
	(location_attribute): Use eliminate_regs for correct expression.
	(output_bound_representation): Use SAVE_EXPR_RTL to get rtl and
	then use eliminate_regs.

	* reload1.c (reload): When finished, indicate reg_equiv_constant
	and reg_equiv_memory_loc are no longer valid.
	(eliminate_regs): Don't attempt use of reg_equiv_constant or
	reg_equiv_memory_loc if they aren't valid.  No longer static.
	* reload.h: Declare eliminate_regs.

	* toplev.c (compile_file): Only call dwarfout_file_scope_symbol
	for VAR_DECLs. 

Sun Jun 30 15:49:39 1991  Ken Raeburn  (raeburn at watch.com)

	* expr.c (expand_builtin, case BUILT_IN_MEMCPY): If alignment test
	fails, and function was really BUILT_IN_STRCPY, zero out length
	parameter before expanding call.

Sun Jun 30 18:27:14 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu)

	* jump.c (jump_optimize): In "if (...) x = a; else x = b;", don't
	move the "x = b;" if the test modifies X or if X is a hard register
	and SMALL_REGISTER_CLASSES is defined.
	Turn "if (...) x = 1; else {...} if (x) ..." code on when we have cc0.

Sun Jun 30 13:49:03 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* gnulib2.c (__builtin_saveregs):
	For i860, make data structure fit in with va-i860.h.

	* tree.c (gcc_obstack_init):
	Support OBSTACK_CHUNK_ALLOC and OBSTACK_CHUNK_FREE.

	* calls.c (prepare_call_address): 3rd arg now address of chain var.
	(expand_call): Call changed.
	* expr.c (emit_library_call): Call changed.

	* function.c (fix_lexical_addr): In recursive call, pass slot address.

	* Makefile.in (cse.o): Added deps.

	* Makefile.in (GNULIB2_CFLAGS): Use -O2.

	* gnulib1.c, gnulib2.c (abort): Undefine only if defined.

	* genattr.c (main): Fix typo in comment end.

Sat Jun 29 21:57:28 1991  Torbjorn Granlund  (tege at zevs.sics.se)

	* longlong.h (__sparc8__ umul_ppmm): Insert 3 nop:s for wr delay.
	* longlong.h (___IBMR2__): Define umul_ppmm, add_ssaaaa, sub_ddmmss..
	* longlong.h (__sparc__): Don't call .umul; expand asm instead.
	  Don't define __umulsidi3 (i.e. use default definition).