changelog.1

早期freebsd实现

Tue Apr 10 21:08:06 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* cccp.c (do_line): No error if string follows number without space.

Tue Apr 10 20:52:02 1990  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* recog.c (apply_change_group): Return a zero if rejected changes.

	* loop.c (update_giv_derive): If a giv is only set conditionally, it
	may only derive other givs in its own basic block.

Tue Apr 10 13:09:40 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* tm-ctix.h:  New file.  Waiting for papers from Ronald Cole.
	csusac!unify![e-mail].

	* cse.c (rtx_cost): Use new macro RTX_COSTS.
	(COSTS_N_INSNS): New macro for use in RTX_COSTS.

	* config.gcc: Fix typos in conditionals and case.  Also usage message.
	Missing backslashes in `echo | tee'.
	Unset various vars after pass 1.

	* c-typeck.c (build_c_cast): Complain if function type specified.

	* expmed.c (synth_mult): Accept max_cost as arg and cut off there.
	Pass it along recursively, making it smaller.
	Eliminate quadratic loop, thus postponing powers of 2.
	Costs are now signed.  Initialize best_alg->cost from max_cost
	and change to -1 only before returning.
	(expand_mult): Pass cost of multiply as max cost.
	Use synth_mult only if optimizing.
	In alg_compound case, sign was backward.
	Use TEM as target for force_operand there, to get better output.

Tue Apr 10 07:09:51 1990  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* expr.c (expand_expr, case COND_EXPR): Add missing argument to
	operand_equal_p.
	Check for (X ? unop A : A) in addition to (X ? A + B : A).

	* Makefile.in (protoize, unprotoize): Compile with GCC, not just link.

	* fold-const.c (fold): Fix typo in converting conditional to COND.

	* expr.c (expand_expr): Treat (A ? 1 : 0) as A when A is a comparison.
	(do_jump): Special-case (A ? 1 : 0) and (A ? 0 : 1).

	* expr.c (store_expr): Fix typo in checking mode of target.

Mon Apr  9 18:33:55 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* integrate.c (expand_inline_function): Clear out parm_copies.

Mon Apr  9 18:00:40 1990  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* tree.def: SAVE_EXPR now has three operands.
	* tree.h: Add new field SAVE_EXPR_CONTEXT; SAVE_EXPR_RTL remains last.
	* tree.c (save_expr): Set context to current function.
	(decl_function_context): Context is in SAVE_EXPR_CONTEXT if SAVE_EXPR.
	* calls.c (expand_call): Call make_tree to build an RTL_EXPR instead
	of explicitly making SAVE_EXPR.
	* cplus-typeck.c (c_expand_return): Use make_tree instead of SAVE_EXPR.
	* c-parse.y, objc-parse.y: Don't call mark_addressable here.
	* expr.c (expand_expr, ..._DECL cases): If non-local, make addressable.
	(expand_expr, case SAVE_EXPR): If defined in containing function, put
	put into stack.
	* function.c (put_var_into_stack): Use SAVE_EXPR_RTL for SAVE_EXPR.
	* print-tree.c (dump): SAVE_EXPR_RTL is now third operand.
	* stmt.c (expand_asm_operands): Call save_expr instead of making
	tree node directly.

Mon Apr  9 00:08:15 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* Makefile.in (install): Turn off x bit on SYSCALLS.c.X.

	* i860.md (cmpeqsf, etc.): Change opcode name to pfeq.ss, etc.

	* tm-m68k.h (PRINT_OPERAND_PRINT_FLOAT): Delete spurious backslash.

	* c-decl.c (store_parm_decls): Don't do storedecls in prototype case.
	That was discarding the enumerators already pushdecl'd.

	* gcc.c (exec_prefix, startfile_prefix): Record prefix search paths.
	(find_a_file): New function to search a path.
	(find_exec_file): Deleted; find_a_file used instead.
	(find_file): Just call find_a_file.
	(add_prefix): Add name to a prefix path.
	(process_command): Call that.

	* gcc.c (spec_list): Generalize asm_spec, etc., to arbitrary names.
	(set_spec): New function.  Set the old specific vars and spec list.
	(do_spec_1): Handle `%(' and `%[' for general specs.

	* ns32k.md (ashlhi3): Use %0, not %1.

	* cplus-tree.h (TREE_ANON_UNION_ELEM, DECL_ANON_UNION_ELEM):
	regdecl_attr is now in decl, not common.
	(TREE_PARMLIST): Use external_attr.
	(TREE_VIA_PUBLIC): Use static_attr.

Sun Apr  8 23:43:59 1990  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* fold-const (fold): Two conversions in a row are needed if from a
	pointer type to an integer type of a different precision.

	* flow.c (mark_used_regs): When replacing addition with register
	in auto-increment creation, mark that insn must be re-recognized.

Sun Apr  8 13:56:17 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* tm-m68k.h (ASM_OUTPUT_FLOAT): Defn depends on CROSS_COMPILER.
	(PRINT_OPERAND): Depends on CROSS_COMPILER and HOST_WORDS_BIG_ENDIAN.
	(PRINT_OPERAND_EXTRACT_FLOAT, PRINT_OPERAND_PRINT_FLOAT):
	These new subroutines contain the code that depends.

	* xm-m68k.h, xm-mips.h, xm-pyr.h, xm-tahoe.h (HOST_WORDS_BIG_ENDIAN):
	New macro, defined in these files.

	* config.gcc: Define macro CROSS_COMPILE if making cross-compiler.
	* Makefile.in (INTERNAL_CFLAGS): Include CROSS.

	* config.gcc: Decode -host argument.  Set $host and $target.
	Rename vars for files to link to, to tm_file, xm_file, etc.
	Let $host override xm_file value.
	Mention $host in messages and config.status if diff from $target.
	Check for errors in args at beginning of processing.

	* expmed.c (expand_shift): Make no insns if count is 0.

	* cse.c (rtx_cost): Increase default cost of mult and div.

	* expmed.c (synth_mult): New function.  Finds best way to multiply
	by given constant, and the cost.
	(expand_mult): Use that.
	(init_expmed): Init new vars add_cost, shift_cost, mult_cost,
	and negate_cost.  mult_is_cheap has been deleted.

	* expmed.c (store_bit_field): Don't use insv if unit for copying
	mem to reg won't hold the entire field.

Sun Apr  8 12:54:07 1990  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* expr.c (expand_expr, case COND_EXPR): Add OK_DEFER_POP to path with
	only OK_DEFER_POP.

Sun Apr  8 12:50:54 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* i386.md (insv): Use SImode for operand 0.

Sat Apr  7 15:24:56 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* emit-rtl.c (gen_lowpart, gen_highpart): When checking mode class,
	check for not MODE_FLOAT.
	* cse.c (fold_rtx): Likewise when avoiding x-x -> 0 for IEEE float.
	* jump.c (jump_back_p): Likewise.
	* optabs.c (emit_cmp_insn): Likewise, comparing result of libcall.
	* expr.c (move_block_to_reg, emit_push_insn): Likewise,
	when putting floats in memory.

	* machmode.def (PSImode, PDImode): Class is now MODE_PARTIAL_INT.
	* expr.c (convert_to_mode): Don't treat them as ints.

	* fixincludes: When making directory links, assume any relative path
	is within /usr/include.

Sat Apr  7 14:56:27 1990  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* function.c (assign_stack_local, assign_outer_stack_local):
	Don't use division for rounding to avoid problems with negative
	dividends; use logical operations instead.
	No need to ever align stricter than BIGGEST_ALIGNMENT.

Sat Apr  7 14:38:36 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* expr.c (expand_expr, case CONSTRUCTOR:): Finish Jan 12 change
	in store_expr by calling store_constructor if target is a temp.

	* cse.c (cse_insn): For regs invalidated by calls, go back to
	checking for fp and ap explicitly, not fixed_regs.

Sat Apr  7 14:06:43 1990  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* recog.h: Define num_validated_changes and cancel_changes.
	* recog.c (validate_change, apply_change_group, cancel_changes):
	Support changes both within an insn and within a MEM.

Sat Apr  7 00:45:49 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* sparc.md (addcc and subcc patterns): Set CC_NO_OVERFLOW.

Fri Apr  6 15:20:51 1990  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* cccp.c (lookup_import): Return -1 for not found to agree with
	the open system call.  Use -2 for duplicate.
	(do_include): -2 now means duplicate; previously, -1 meant not found
	from open and duplicate from lookup_import.

Fri Apr  6 00:06:08 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* c-decl.c (poplevel): Use DECL_INITIAL to detect undef label.

	* sparc.md (peephole for returning sum): Use more restrictive preds.

	* reload1.c (choose_reload_regs): When testing reload reg
	for HARD_REGNO_MODE_OK, use SImode instead of VOIDmode.

Thu Apr  5 14:00:41 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* cccp.c (main, include_defaults): Use STANDARD_INCLUDE_DIR
	instead of /usr/include.
	* Makefile.in (cccp.o): Specify STANDARD_INCLUDE_DIR.

	* varasm.c (assemble_variable): No sdb output for initialized global.
	* toplev.c (compile_file): Output it here, at end of run.

	* stdarg.h (va_start): Round initial pointer value down
	to double boundary.  This is to eliminate big-endian adjustment.

	* fixincludes: Delete netinet/ip.h and sundev/vuid_event.h
	if no changes are needed.

	* c-typeck.c (build_c_cast): Reject array types for result.
	* cplus-typeck.c (build_c_cast): Likewise.

	* tm-*.h (ASM_OUTPUT_SKIP): Print size as unsigned.
	(ASM_OUTPUT_COMMON, ASM_OUTPUT_LOCAL): Likewise.

	* fold-const.c (fold): Simplify double truncation, double extension,
	or extension followed by truncation.

	* fixincludes: Don't ignore errors when making dirs.
	But check whether dir already exists.

	* cse.c (fold_rtx): Don't simplify real*0, because of nans.

	* real.h (dconst0, dconst1, dconstm1): Declare them.
	* tree.c (real_zerop, real_onep): New functions.
	* fold-const.c (fold): Check for trivial +, -, * with reals.
	Also use dconst0 instead of computing with REAL_VALUE_ATOF.

Tue Apr  3 22:52:26 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* m68k.md (32-bit bit fields): Special patterns added.
	(push byte and adjust stack by 2): New peephole.
	These from Bruce Robertson.

	* c-decl.c (grokdeclarator): Complain if fn defn has `typedef' etc.

Tue Apr  3 21:39:54 1990  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* expr.c (preexpand_calls): Reinsert check to not expand calls
	already preexpanded.

Mon Apr  2 07:05:34 1990  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* c-typeck.c (digest_init): Don't blow up on null list.

	* Makefile.in (cc1obj): Link OBJC_OBJS instead of C_OBJS.
	* objc-actions.c: Correct compilation errors.
	* objc-parse.y: Likewise.

Mon Apr  2 03:33:14 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* objc-actions.h: Define the objc tree codes.
	Declare doing_objc_thang.

Fri Mar 30 17:28:30 1990  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)

	* sdbout.c (PUT_SDB_EPILOGUE_END): Write out assembler name for
	function (i.e., usually include leading "_").

	* sdbout.c (PUT_SDB_...): Use new macro SDB_DELIM; it defaults to ";".

Fri Mar 30 15:25:20 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* jump.c (prev_active_insn, next_active_insn): New functions.
	These skip USEs and CLOBBERs.
	(jump_optimize): Use them instead of ..._real_insn
	for the simple optimizations.

	* integrate.c (expand_inline_function): Always index const_equiv_map
	with regno from current function.  And set up the map only after
	creating all the pseudos we will need for the parms.
	This requires intermediate tables parm_equivs and parm_copies.
	Make const_equiv_map big enough to handle all the pseudos we
	expect to make.  Record actual size, and don't look in it
	for regnos too large.
	(subst_constants, const_equiv): Don't access const_equiv_map
	if regno is too large.

	* function.c (trampoline_address): Push and pop obstacks around
	call to assign_outer_stack_local.

	* function.c (push_function_context, pop_function_context):
	Save and restore max_parm_reg and parm_reg_stack_loc.
	* function.h (struct function): Make slots.

	* c-decl.c (c_build_type_variant): New function.
	(grokdeclarator): Call that, for ARRAY_TYPE only, in fields and vars.
	* c-decl.c, c-typeck.c: All calls to build_type_variant use that now.

	* emit-rtl.c (reinstate_emit_status): Unused function deleted.

Thu Mar 29 15:35:47 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* tree.c (rtl_in_current_obstack): New function.
	* toplev.c (rest_of_compilation): Call that.
	This makes it true that rtl is allocated in current_obstack
	during optimization.

	* reload1.c (eliminate_frame_pointer): Scan equivalent addresses
	of pseudo-regs, and eliminate frame-pointer there too.
	(reload): Don't do this here.

	* c-decl.c (build_enumerator): Return pair of decl and value.
	(finish_enum): Go through the list replacing decls with names.

	* function.c (fixup_var_refs): Eliminate all but first arg.
	Use current sequence_stack, insn chain and rtl_expr_chain.
	(put_var_into_stack): Don't pass those args.
	If var is nonlocal, don't do it now; put it on fixup_var_refs_queue.
	(pop_function_context): Do fixup_var_refs on vars queued up.