changelog.2

早期freebsd实现

	* sdbout.c (sdbout_symbol): Apply changes in dbxout.c to deal with
	SUBREG.	 Don't emit a symbolic definition for variables that can't
	be represented.

Thu Jan 24 21:18:15 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* config: Conditional for setting $os was backward.
	Also mention name of make-var file if one exists.

	* out-i386.c: Delete a large piece of accidental insertion.

	* dwarfout.c: Don't include c-tree.h or cplus-tree.h.
	(INT_TYPE_SIZE, etc.): Define them if not overridden.
	(fundamental_type_code): Distinguish types by TYPE_PRECISION.
	But also check for the built-in C type names.

Thu Jan 24 15:23:17 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* gcc.c (default_compilers): Pass all args starting with "O" to 
	cc1 so that -O2 is passed along.

Thu Jan 24 13:10:27 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* stmt.c (expand_expr_stmt): Don't warn for any casts to void.

	* config: Fix typos setting shell vars.
	Rename config to config-dir.
	Insert missing \ in case for delta.

Wed Jan 23 16:31:27 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* emit-rtl.c (emit_jump_insn_{before,after}): Allow PATTERN to be
	a SEQUENCE.

	* loop.c (check_dbra_loop): Use emit_jump_insn_before when writing 
	out compare and jump sequence, not emit_insn_before, to ensure that
	if we only write one insn  that it is a JUMP_INSN.

	* toplev.c (flag_rerun_cse_after_loop): New: -frerun-cse-after-loop.
	(rest_of_compilation): Rerun cse after loop if desired.
	(main): Add support for -O2.
	Prescan args for -O and -O2 to set default values for many -f options.
	Add call to new macro OPTIMIZATION_OPTIONS.
	Save status of -version until all args have been processed; then
	write out the info.
	(print_single_switch): New function.
	(print_switch_values): Renamed from print_target_switch_defaults.
	Now prints out currently enabled -f, -m, and -W switches.  Calls
	print_single_switch to write out switch and handle long lines.

	* rtl.def (SUBREG): Change rtx class from 'o' to 'x'.

	* cse.c (find_comparison_args): Ignore hash table entry if not valid.

Wed Jan 23 00:12:24 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* config: File renamed from config.gcc.
	Allow abbreviations for +-options.
	Allow config HOST TARGET.
	Support +gas and +nfp as separate options.
	Rename all the machine alternatives to general scheme:
	cpu/company-system.  Allow abbreviations for cpu/company pairs.
	* config-dir: Dir renamed from config.

	* Makefile.in (install-dir): Create bindir here.

	* cccp.c (main): Delete duplicat p++ left in last change.

	* Makefile.in (GNULIB1, GNULIB1_TARGET): Renamed from GNULIB*.
	(gnulib1.portable, gnulib1.target): Renamed from gnulib.*.
	They now make a file named gnulib1, from gnulib1.c.
	(LIB1FUNCS, LIB1FUNCS_EXTRA): Renamed from LIBFUNCS*.
	(for-bootstrap, rest.encap): Depend on gnulib, not GNULIB2_TARGET.
	(stamp-gnulib2): This file is no longer used.
	(gnulib2.portable): Old stamp-gnulib2 rule renamed to this.
	Now create a file named gnulib2, from gnulib2.c alone.
	(gnulib): New target, combines gnulib1 and gnulib2 into gnulib.
	(mostlyclean): Delete additional temporary files.
	No need to avoid deleting stamp-gnulib2.
	(clean): Delete gnulib1 and gnulib2, but not stamp-gnulib2.
	(realclean): No need to delete gnulib here.
	(install-gnulib): Changed dependencies.
	* gnulib1.c: File gnulib.c renamed.

	* Makefile.in (install-dir): Create bindir here.

	* cccp.c (main): Delete duplicat p++ left in last change.

Sun Jan 20 14:00:16 1991  Michael Tiemann  (tiemann at cygnus.com)

	* cplus-class.c (finish_struct): Conditionalize EMPTY_FIELD_BOUNDARY
	on whether or not it is defined.  Similarly for	PCC_BIT_FIELD_MATTERS. 

Wed Jan 16 18:56:30 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* cse.c (fold_rtx): When folding dispatch table, stay inside bounds.

Wed Jan 16 08:11:48 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* reload.c (find_reloads_toplev): Fix typo in recent change.

	* reload1.c (eliminate_regs): If we have a non-paradoxical
	(subreg (pseudo)) and the pseudo has an equivalent memory
	location, replace the SUBREG because find_reloads may do it.

Tue Jan 15 01:41:28 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* loop.c (scan_loop): Condition for movability was wrong.
	A reg that isn't necessarily set may be unsafe
	even if used only inside the loop.
	However, a reg used only in the same basic block after the set is safe.
	So is a reg that isn't a user-level variable.

	* loop.c (loop_optimize): Reverse order of scanning loops.

	* loop.c (scan_loop): After skipping the insns of a libcall sequence,
	ignore notes when searching back to find the last insn of the seq.

	* cccp.c (main): Use envvar GCC_EXEC_PATH to specify translation
	of prefixe in default include dirs.

	* cccp.c (main): Do path_includes after explicit options.

	* combine.c (try_distrib): Don't push + thru negative count shifts.

Mon Jan 14 09:40:28 1991  Ken Raeburn  (raeburn at watch.com)

	* cplus-lex.c (yylex): Even in `extern "C"', the keywords are the
	same.

	* cplus-lex.c (input_from_saved_text): New function.  Set string
	source for FILE pointer.
	(yylex, do_pending_inlines): Call it.

	* cplus-parse.y (stmts, stmt): Type is now `tree'.  Some actions
	fixed to return it.

	* cplus-lex.c (reinit_parse_for_block): New function, with most of
	the guts of reinit_parse_for_method.  Magic argument IS_TEMPLATE
	chooses a set of error messages.
	(reinit_parse_for_method): Call it.
	cplus-template.c (reinit_parse_for_template): New function, also
	calls reinit_parse_for_block.

Mon Jan 14 07:20:36 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* loop.c (skip_consec_insns, move_movables, strength_reduce): Don't
	call find_reg_note on a NOTE.

Sun Jan 13 15:45:23 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* cccp.c: Separate namespace for assertions.  Don't expand macros
	inside assertions in #if.  Allow arbitrary token sequences.
	(rescan): Special handling after `#' if assertions_flag.
	(expand_to_temp_buffer): New arg sets assertions_flag. Callers changed.
	(eval_if_expression): Pass 1 for that arg.
	(skip_paren_group): New function.
	(assertion_hashtab, ASSERTION_HASHSIZE, ASSERTION_HASHNODE): New.
	(assertion_install, assertion_lookup, delete_assertion): New functions.
	(T_ASSERTION): Deleted.
	(tokenlist_list): Renamed from arglist_list.
	(read_token_list): Renamed from read_keyword_list.  Much changed.
	Copy the strings into the heap.
	(free_token_list): Renamed from free_keyword_list.  Free the strings.
	(do_assert, do_unassert): Considerably changed.
	(check_assertion): Somewhat changed.
	(check_macro_name): Extra arg contributes to error message.
	* cexp.y (yylex): Parse everything as a name if keyword_parsing.
	(rule for assertions): Set, then clear, keyword_parsing.
	(keywords): Allow empty sequence.  Allow nested parens.

Sat Jan 12 12:18:00 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* c-typeck.c (build_unary_op): Make better code for simple casts.

	* reload.c (find_reloads): Computing reload_when_needed, don't neglect
	operands that don't have output reloads.

	* cse.c (refers_to_mem_p): At check_addr, handle PLUS inside CONST.

Sat Jan 12 06:30:56 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* reorg.c (steal_delay_list_from_*): Add missing argument to calls to
	insn_sets_resource_p.
	(fill_eager_delay_slots, relax_delay_slots): Add missing argument
	to calls to mostly_true_jump.
	(relax_delay_slots): Correctly handle case where we can't invert jump.

	* reload.c (find_reloads_toplev): If we have a SUBREG of a
	pseudo that resides in memory and the address is not offsettable,
	substitute for the pseudo now so we can generate a reload for the
	address.

Fri Jan 11 14:39:09 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* tm-next.h (LIB_SPEC, STARTFILE_SPEC): Don't support -p.

Thu Jan 10 12:26:49 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* tm-sun2.h (CC1_SPEC): Define to ignore -sun2 and -target.
	(WORD_SWITCH_TAKES_ARG): Define to recognize -target.
	(LIB_SPEC): Define; handle -a.
	* tm-sun2os4.h: New file.
	* tm-m68k.h (TARGET_SWITCHES): Handle -msky and -mnosky.
	(TARGET_SKY): New macro.

	* tm-next.h (LIB_SPEC): Use -lsys_s, not -lc.

	* c-parse.y (yylex): Fix typo.

	* genoutput.c (output_prologue): Make insn-output.c use insn-codes.h.
	* Makefile.in (insn-output.o): Depend on insn-codes.h.

	* Makefile.in (install-headers): Save $(libsubdir) before cd.

	* Makefile.in (gnulib): Depend on config.status.

	* gnulib2.c (__umulsidi3): Use #else around inline function.
	Use __-style names for all machines.

Wed Jan	 9 17:06:18 1991  Michael Tiemann  (tiemann at cygnus.com)

	* out-sparc.c (various places): Change \; to \n\t in printf
	strings.

	* sparc.md: Change PIC initialization pattern to recognize pattern
	that doesn't involve a clobber.
	* out-sparc.c: Rest of change is here, where PIC initialization is
	emitted.

	* cse.c (simplify_unary_operation, simplify_binary_operation):
	Correctly adjust VAL for bits outside MODE.

Wed Jan	 9 15:45:26 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* flow.c (libcall_dead_p): Handle a CALL in a PARALLEL.

Tue Jan	 8 13:35:50 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* expmed.c (emit_store_flag): Correct UNSIGNEDP value passed to
	convert_to_mode and expand_unop.

Mon Jan	 7 11:56:31 1991  Michael Tiemann  (tiemann at cygnus.com)

	* gplus.gperf: New keywords for templates and other extensions.

	* cplus-lex.c: Incorprate new gperf code.

	* cplus-class.c (resolve_scope_to_name): New function.
	(build_scoped_method_call): Call `resolve_scope_to_name' instead of
	handling by itself.
	* cplus-decl.c (pushdecl_class_level): Give forward declaration.
	(lookup_nested_type): New function.
	(pushtag,lookup_tag,xref_tag): Handle nested classes.
	(finish_function): Add comment about obscure argument passing
	convention for static method calls (at the call site).	Also, don't
	call operator delete with NULL pointer.	 Call it with
	`current_class_decl' instead.
	(globalize_nested_type): New function.	Used when we learn that a
	type which initially appeared to be nested should be defined in the
	global scope instead.
	(grokdeclarator): Call `globalize_nested_type' when grokking an
	as-yet undefined class type.
	* cplus-dem.c: Updated to handle qualified (i.e. nested) types.
	This means handling the new letter `Q' in mangled names.
	* cplus-init.c (build_member_call): Handle nested classes using
	`resolve_scope_to_name' instead of handling itself.
	* cplus-lex.c (typename_scope_in_progress): New static variable to
	allow the lexer to figure out what are nested class typenames,
	scoped member references, etc., without getting the parser too
	involved.
	(yylex): Recognize SCOPED_TYPENAME and TYPENAME_SCOPE tokens.
	Also, recognize '<' and '>' separately from ARITHCOMPARE so we can
	implement templates.
	No longer recognizes (X::*) or (X::&) as single tokens.
	* cplus-method.c (build_overload_nested_name): New function to build
	internal names for nested typenames.
	* cplus-parse.y: Handle parameterized type syntax (more or less).
	(dummy_decl): Gone!
	Nested types are now handled.
	* cplus-tree.h (DECL_UNDEFINED_FRIENDS): Moved out of DECL_CONTEXT
	slot of TYPE_DECLs.  DECL_CONTEXT of typename is now the enclosing
	type for nested types.
	(DECL_NESTED_TYPENAME): An identifier pointer that makes the name of
	the type unique for the compilation.
	(IDENTIFIER_*): When initializing, call `perm_calloc', not
	permalloc, since non-zero values actually mean something,
	and we don't guarantee to initialize everything in one go.
	* tree.c (perm_calloc): New function.
	* cplus-typeck.c (default_conversion): Don't defaultly convert a
	naked METHOD_REF such that it becomes a virtual function table
	index.	Only let this happen if user requests it with `&'.

	* Makefile.in: Handle new source file cplus-template.c.

Mon Jan	 7 15:03:53 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* c-typeck.c (process_init_constructor): Error if values
	provided for an array of empty elements.

	* out-i386.c (fp_top_dead_p1): Follow jump only if optimizing.
	(fp_call_internal): Discard result if unused.  Use fp_top_dead_p1.

	* cse.c (cse_insn): In special case for (set REG0 REG1),
	change any REG_EQUIV notes to REG_EQUAL.

	* tm-sun386i.h (PCC_BITFIELD_TYPE_MATTERS): Define it.

	* tm-att386.h (ASM_OUTPUT_LOCAL): Change back to data section.

	* genrecog.c (write_tree_1): Typo in printf string.

	* flow.c (libcall_dead_p): New arguments NOTE and INSN.
	Now test that the hard return reg in the call is dead.
	Callers changed.

Mon Jan	 7 12:27:07 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* recog.c (cancel_changes): Cancel changes in opposite order we made
	them.