changelog.8

gcc库的原代码,对编程有很大帮助.

Tue Jan 25 08:30:11 1994  Chip Salzenberg  ([e-mail])

	* cse.c (HASHBITS): Removed.
	(HASH, struct set, canon_hash, safe_hash, remove_from_table):
	Generate and use unsigned hash values, to avoid potential trouble
	with signed shift/overflow.
	Also name variables consistently: "hash", not "hash_code".
	(lookup, lookup_for_remove, insert, merge_equiv_classes): Likewise.
	(invalidate, rehash_using_reg, invalidate_for_call): Likewise.
	(find_best_addr, record_jump_cond, cse_insn):  Likewise.

Mon Jan 24 18:59:59 1994  Jim Wilson  ([e-mail])

	* expmed.c (store_split_bit_field):  For BYTES_BIG_ENDIAN, only
	pad on left if value not in memory.  Reject gen_lowpart_common
	output if it returns the input value.

	* unroll.c (copy_loop_body): When delete simplified condjump,
	protect the label, so that it doesn't get deleted also.

	* toplev.c (compile_file): If yyparse returns an error, pop all
	pending binding levels.

Mon Jan 24 18:30:53 1994  Doug Evans  ([e-mail])

	* objc/Object.h (streamVersion, read, write): #ifndef out for the
	alpha since TypedStream not supported there yet.
	* objc/Object.m (streamVersion, read, write): Ditto.

Mon Jan 24 17:40:56 1994  Jim Wilson  ([e-mail])

	* sparc.c (sparc_address_cost): Delete.
	* sparc.h (ADDRESS_COST): Define to 1.

	* bsd-5.h, mips-5.h, svr3-5.h, svr4-5.h (ASM_OUTPUT_NEWLINE):
	Define new macro.
	* mips.h (ASM_OUTPUT_NEWLINE): New default for new macro.
	(ASM_OUTPUT_ASCII): Use ASM_OUTPUT_NEWLINE.

	* sparc.h (ASM_OUTPUT_COMMON): Don't output .global.  Use SIZE not
	ROUNDED.
	(ASM_OUTPUT_LOCAL): Delete.
	(ASM_OUTPUT_ALIGNED_LOCAL): Define.

Sun Jan 23 18:57:01 1994  Richard Earnshaw ([e-mail])

	* expr.c (do_jump_for_compare): Initialize JUMP_LABEL for the branch
	insn before trying to invert it.

Sun Jan 23 18:40:23 1994  Samuel A. Figueroa  ([e-mail])

	* i386/os2.h (PATH_SEPARATOR): New macro.
	* i386/gas.h (ASM_FILE_START): Delete; identical to one in bsd.h,
	which is included.

Sun Jan 23 18:21:23 1994  Randy S. Welch  ([e-mail])

	* m68k/plexus.h: Assume GAS 2.x used and add support for debugging.

Sun Jan 23 06:19:28 1994  Richard Kenner  ([e-mail])

	* reload.c (find_reloads): Properly test for output operand
	when changing RELOAD_FOR_OUTPUT_ADDRESS to RELOAD_FOR_INPUT_ADDRESS.

	* combine.c (subst, case SUBREG): Handle paradoxical SUBREG of
	constant.
	(IF_THEN_ELSE): Add missing "else" and check for comparison
	before calling reversible_comparison_p.

	* c-typeck.c (output_init_elements): Use FIELD instead
	of constructor_fields when doing alignment and sizing.
	(output_pending_init_elements): Don't blow up when writing
	other than first field put haven't written anything yet.
	Update constructor_bit_index when we emit a skip.

	* toplev.c (rest_of_compilation): Defer compilation of function
	that were specified as inline, whether or not they actually were
	inlined.

	* alpha.h (OBJECT_FORMAT_COFF, EXTENDED_COFF, NM_FLAGS): Define.
	* x-alpha: New file.

	* combine.c (simplify_comparison): Can remove NOT on both operands
	if we swap comparison code.

	* rs6000.md: Insert some missing blank lines.

	* alpha.c (output_{pro,epi}log): Use assemble_name to output
	alpha_function_name.

	* combine.c (simplify_comparison): Fix typos in last change.

Sun Jan 23 05:59:31 1994  Per Bothner  ([e-mail])

	* c-typeck.c (really_start_incremental_init): Save current elements
	instead of clearing them.

Sat Jan 22 15:50:29 1994  Richard Kenner  ([e-mail])

	* c-typeck.c (c_expand_return): Issue a warning if returning
	address of non-static local object.

	* combine.c (if_then_else_cond): Don't do anything with COMPARE.
	(simplify_comparison): Strip SIGN_EXTEND, NOT, or NEG when
	both operands have it.

	* combine.c (num_sign_bit_copies): Ifndef WORD_REGISTER_OPERATIONS,
	ensure we don't do the wrong thing if X is narrower than MODE.

Thu Jan 20 01:06:23 1994  Jeffrey A. Law  ([e-mail])

	* pa.h (ASM_OUTPUT_SOURCE_LINE): Make the first source line stab
	for each procedure special to avoid the need for nasty hacks in GAS.

	* pa.md (iorscc): Fix typo.

Wed Jan 19 19:35:37 1994  Torbjorn Granlund  ([e-mail])

	* pa.h (ASM_GLOBALIZE_LABEL): Don't globalize function labels here.

Mon Jan 17 16:38:16 1994  Jim Wilson  ([e-mail])

	* xcoffout.c (xcoffout_begin_block): Don't emit a .bb for the
	function level scope.
	(xcoffout_end_block): Don't emit a .eb for the function level
	scope.

Sun Jan 16 14:29:31 1994  Richard Stallman  ([e-mail])

	* config.sub: Alphabetize the list of machine-name aliases.
	Add nh3000 and nh[45]000.
	Delete duplicate clauses for hp9k2... and hp9k31...

Sat Jan 15 18:06:45 1994  Torbjorn Granlund  ([e-mail])

	* config/sparc/sparc.md (smulsi3_highpart): New pattern.
	(umulsi3_highpart): New pattern.
	* config/mips/mips.md (smulsi3_highpart): New pattern.
	(umulsi3_highpart): New pattern.

Thu Jan 13 18:54:27 1994  Jim Wilson  ([e-mail])

	* iris3.h (CPP_SPEC): Define __SIZE_TYPE__, __PTRDIFF_TYPE__, and
	__mips.
	(SIZE_TYPE, PTRDIFF_TYPE): Delete.
	* mips.c (dfhigh, dflow, sfhigh, sflow): New variables.
	(mips_sw_reg_names): Consistently use $ as name prefix.
	(large_int): Handle 64 bit constants.
	(reg_or_0_operand, mips_const_double_ok): Don't examine
	CONST_DOUBLE internals.
	(mips_const_double_ok): Use REAL_VALUE_* macros.
	(simple_memory_operand): Add 64 bit support.  Only test
	TARGET_GP_OPT to determine if doing gp optimizations.  Pass
	address not MEM to eliminate_constant_term.  Use SMALL_INT.
	(mips_fill_delay_slot): Add 64 bit support.
	(mips_move_1word): Add 64 bit support.  Don't examine CONST_DOUBLE
	internals.
	(mips_move_2words): Likewise.
	(mips_address_cost): Pass address not MEM to
	eliminate_constant_term.  Use SMALL_INT.
	(gen_int_relational): New variable mode.  Add 64 bit support.
	(gen_conditional_branch): Add 64 bit support.
	(block_move_load_store, block_move_loop, block_move_call,
	expand_block_move, output_block_move, function_arg_advance,
	function_arg, function_arg_partial_nregs): Likewise.
	(override_options): Clear MASK_GPOPT if threshold is zero or
	negative.  Set MASK_GPOPT if optimizing.  Set mips_isa from -misa=
	option, else from MIPS_ISA_DEFAULT if defined, else to 1.  Make
	default cpu depend on isa.  Add cpus r4400, r4600, orion.  Rewrite
	TARGET_NAME_REGS support.  Initialize dfhigh, dflow, sfhigh,
	sflow.  Add 64 bit support.
	(print_operand): Use REAL_VALUE_* macros.
	(mips_output_external): Don't depend on mips_section_threshold.
	(make_temp_file): Define P_tmpdir when __MSDOS__.  Malloc filename
	string.  Don't unlink temp file when __MSDOS__.
	(mips_asm_file_start): Delete TARGET_NAME_REGS support.
	(mips_asm_file_end): Unlike temp file when __MSDOS__.
	(mips_declare_object): Don't test mips_sections_threshold.
	(compute_frame_size, save_restore_insns, function_prologue,
	mips_expand_prologue, function_epilogue, mips_expand_epilogue):
	Add 64 bit support.
	(function_epilogue): Correctly output `#' before .set volatile.
	* mips.h (enum cmp_type): Add 64 bit support.
	(enum processor_type): Add PROCESSOR_R4600.
	(MASK_64BIT, TARGET_64BIT): New mask bit, to indicate 64 bit mode.
	(HAVE_64BIT_P, OPTIMIZATION_OPTIONS): Delete.
	(CPP_SPEC): Don't abort if not defined.
	(CC1_SPEC): -mips1 and -mips2 imply -mfp32. -mips3 implies -mfp64.
	(CPP_SPEC): Define __SIZE_TYPE__, __PTRDIFF_TYPE__, and __mips.
	(BITS_PER_WORD, UNITS_PER_WORD, INT_SIZE_TYPE, LONG_TYPE_SIZE,
	LONG_LONG_TYPE_SIZE, POINTER_SIZE, POINTER_BOUNDARY,
	PARM_BOUNDARY, EMPTY_FIELD_BOUNDARY, HARD_REGNO_NREGS,
	CONST_OK_FOR_LETTER_P, STACK_ARGS_ADJUST, FUNCTION_PROFILER,
	TRAMPOLINE_TEMPLATE, TRAMPOLINE_SIZE, TRAMPOLINE_ALIGNMENT,
	INITIALIZE_TRAMPOLINE, CASE_VECTOR_MODE, MOVE_MAX,
	TRULY_NOOP_TRUNCATION, Pmode, FUNCTION_MODE,
	ASM_OUTPUT_ADDR_VEC_ELT, ASM_OUTPUT_ADDR_DIFF_ELT,
	ASM_OUTPUT_REG_PUSH, ASM_OUTPUT_REG_POP): Add 64 bit support.
	(MAX_BITS_PER_WORD, MAX_UNITS_PER_WORD, UNITS_PER_FPREG,
	MAX_INT_TYPE_SIZE, MAX_WCHAR_TYPE_SIZE, MAX_LONG_TYPE_SIZE,
	MAX_MOVE_MAX): Define.
	(INDEX_REG_CLASS): NO_REGS not GR_REGS.
	(CONST_DOUBLE_OK_FOR_LETTER_P): Don't examine CONST_DOUBLE
	internals.
	(PREFERRED_RELOAD_CLASS): Return CLASS if it isn't ALL_REGS.
	(TRANSFER_FROM_TRAMPOLINE, ASM_OUTPUT_CASE_LABEL): Delete.
	(REGNO_OK_FOR_INDEX_P, REG_OK_FOR_INDEX_P): Redefine to 0.
	(GO_IF_LEGITIMATE_ADDRESS): Delete redundant code0 == REG test.
	(ENCODE_SECTION_INFO): Don't test mips_section_threshold.
	(CONST_COSTS): CONST_INT have cost 0 not CONSTS_N_INSNS (0).  Pass
	address not MEM to eliminate_constant_term.  Add 64 bit support.
	(MEMORY_MOVE_COST, ASM_OUTPUT_DOUBLE_INT): Define.
	(EXTRA_SECTIONS): Delete in_last_p1.
	(SELECT_RTX_SECTION): Delete division by BITS_PER_UNIT.
	(NO_BUILTIN_SIZE_TYPE, NO_BUILTIN_PTRDIFF_TYPE): Define.
	(SIZE_TYPE, PTRDIFF_TYPE): Add 64 bit support.
	* mips.md (cpu): Add r4600.
	(define_function_unit): Correct numerous errors.  Add r4600.
	(adddi3*, subdi3*, mulsidi3, umulsidi3, negdi2*, one_cmpdl2*,
	nordi2*, anddi2*, iordi3*, xordi3*, movdi*, ashldi3*, ashrdi3*,
	lshrdi3*, seq, sne, sgt, sge, slt, sle, sgtu, sgeu, sltu, sleu,
	indirect_jump, tablejump, call*, call_value*): Add 64 bit support.
	(adddi3_internal_3, addsi3_internal_2, subdi3_internal_3,
	subsi3_internal_2, muldi3, muldi3_internal, divmoddi4, udivmoddi4,
	divdi3, moddi3, udivdi3, umoddi3, absdi3, ffsdi2,
	negdi2_internal_2, anddi3_internal1, xordi3_immed, truncdisi2,
	truncdihi2, truncdiqi2, zero_extendsidi2,
	zero_extendsidi2_interal, zero_extendhidi2, zero_extendqidi2,
	extendsidi2, extendhidi2, extendhidi2_internal, extendqidi2,
	extendqidi2_insn, fix_truncdfdi2, fix_truncsfdi2, floatdidf2,
	floatdisf2, fixuns_truncdfdi2, fixuns_truncdfsi2,
	ashldi3_internal4, ashrdi3_internal_4, lshrdi3_internal4, cmpdi,
	tstdi, branch_zero_di, branch_equality_di, seq_di_zero, seq_di,
	sne_di_zero, sne_di, sgt_di, sge_di, slt_di, sle_di_const,
	sle_di_reg, sgtu_di, sgeu_di, sltu_di, sleu_di_const, sleu_di_reg,
	indirect_jump_internal1, indirect_jump_internal2,
	tablejump_internal1, tablejump_internal2): New patterns.
	(mulsi3): Add missing mips_move_1word parameter.
	(mulsi3+1): Don't split on r4000.
	(divmodsi4, udivmodsi4, udivsi3, umodsi3): Correct lengths.
	(divsi3, modsi3, udivsi3, umodsi3): Allow constant operands.
	(sqrtdf2, sqrtsf2): Correct type attribute.
	(abssi2): Add mips2 support.
	(movsi_unaligned, movsi_ulw, movsi_usw): Comment out.
	(movsf, movdf): Use F not E.
	(cmpdf, cmpsf, branch_fp*, s{eq,ne,lt,le,gt,ge}_[ds]f): Depend on
	TARGET_HARD_FLOAT.
	* va-mips.h: Add 64 bit support.

Thu Jan 13 06:14:17 1994  Paul Eggert  ([e-mail])

	* c-parse.in (maybe_attribute): Allow multiple __attribute__
	clauses on a declaration.

Thu Jan 13 06:01:09 1994  Richard Kenner  ([e-mail])

	* a29k.h (REG_CLASS_CONTENTS): Fix problems with last word of
	register set in some classes.

	* a29k.h (MEMORY_MOVE_COST): New macro.

Thu Jan 13 05:42:30 1994  Torbjorn Granlund  ([e-mail])

	* config.sub: Fix typo in -hiux* case.

Wed Jan 12 13:25:12 1994  Per Bothner  ([e-mail])

	* dbxout.c (dbxout_range_type):  If the range has a base type
	(TREE_TYPE), emit it, even if that is some other integer type.

Wed Jan 12 06:02:23 1994  David Edelsohn  ([e-mail])

	* rs6000.h (MASK and TARGET): Change POWERPCSQR to PPCFPX to
	describe both fsqrt and fsel.
	(TARGET_SWITCHES): powerpc64 implies ppcfpx.
	* rs6000.c (rs6000_override_options): Change POWERPCSQR to PPCFPX.
	* rs6000.md (sqrtsf2, sqrtdf2): Change POWERPCSQR to PPCFPX.
	(maxsf3, minsf3, maxdf3, mindf3): New patterns using fsel instruction.

Tue Jan 11 19:14:31 1994  Richard Kenner  ([e-mail])

	* a29k.c (output_prolog): Update debug reg map when 
	we have -mkernel-registers.

	* fold-const.c (fold, truth_andor): Don't apply distributive
	law when it would change evaluation order.
	Clean up code a bit to improve flow.

Mon Jan 10 19:37:27 1994  David Robinson ([e-mail])

	* expr.c (emit_move_insn_1): Call gen_realpart and gen_imagpart
	instead of gen_lowpart and gen_highpart.
	* function.c (assign_parms): Likewise.
	* optabs.c: Remove redundant prototype for gen_highpart.

Mon Jan 10 19:14:07 1994  Richard Earnshaw ([e-mail])

	* jump.c (comparison_dominates_p): NE is dominated by LT, GT, LTU
	and GTU.

Mon Jan 10 19:06:57 1994  Richard Kenner  ([e-mail])

	* emit-rtl.c (gen_{real,imag}part): Extract value from
	CONCAT directly.
	(gen_lowpart_common, gen_highpart): Don't do it here.

	* cse.c (simplify_relational_operation): Don't do anything with CC0
	in addition to MODE_CC values.

	* expr.c (protect_from_queue): If (MEM (QUEUED ...)), modify a
	new MEM instead of the one we were passed.

	* i386/linux.h: Update banner, reformat comments.
	(STARTFILE_SPEC, GPLUSPLUS_INCLUDE_DIR): No longer conditional
	on CROSS_COMPILER.
	* Makefile.in (gcc.o, cccp.o): No longer define TOOLDIR.

	* regclass.c (globalize_reg): New function.
	(init_reg_sets_1): Don't handle global regs here.
	* varasm.c (make_decl_rtl): Call globalize_reg, not init_reg_sets_1.

	* a29k.c (print_operand, case 'F'): If we have to do the last
	prolog insn, give that priority for an unfilled delay slot.

	* function.c (preserve_rtl_expr_result): New function.	
	* expr.c (exand_expr, case RTL_EXPR): Call it.

Mon Jan 10 13:43:04 1994  Jim Wilson  ([e-mail])

	* sched.c (new_insn_dead_notes): Compare registers with rtx_equal_p.

	* Makefile.in (Makefile, stmp-fixinc, deduced.h, stmp-fixproto):
	Execute shell scripts with $(SHELL).
	* config/x-lynx (SHELL): Define to /bin/bash.

Sun Jan  9 22:31:00 1994  Jeffrey A. Law  ([e-mail])

	* pa.md (special indexed fpstores): Fix assorted typos.

Sun Jan  9 04:34:17 1994  James Van Artsdalen  (james at bigtex.cactus.org)

	* jump.c (follow_jumps): Don't follow tablejumps.

	* Makefile.in (install-headers-cpio): Run cpio in include-dir.