changelog.8

gcc库的原代码,对编程有很大帮助.

Tue Mar  1 19:43:31 1994  Stan Shebs  ([e-mail])

	* a29k/a29k.h (TARGET_SOFT_FLOAT): Define.
	(TARGET_SWITCHES): Add -msoft-float.
	* a29k/a29k.md (all floating point): Disable floating point insns
	if doing soft floats.

Tue Mar  1 19:36:05 1994  Glenn Holloway  ([e-mail])

        * defaults.h (ASM_OUTPUT_ADDR_DIFF_ELT): Use
	ASM_OUTPUT_INTERNAL_LABEL instead of ASM_GENERATE_INTERNAL_LABEL.

Tue Mar  1 19:26:47 1994  Jim Wilson  ([e-mail])

	* sparc/sol2.h (JUMP_TABLES_IN_TEXT_SECTION): Delete.
	* sparc/sysv4.h (JUMP_TABLES_IN_TEXT_SECTION): Add.

	* c-typeck.c (build_binary_op): Pass TREE_TYPE (orig_op0) not
	orig_op0 to TREE_UNSIGNED.

Tue Mar  1 18:33:33 1994  Richard Kenner  ([e-mail])

	* varasm.c (output_constant): Strip off some NOP_EXPRs
	before further processing.

Tue Mar  1 12:00:00 1994  Stan Cox  ([e-mail])

	* m88k.c (legitimize_address, print_operand): Make -fPIC work
	again.  Put addresses inside UNSPEC when loading them to
	ensure that cse won't mistakenly optimize them.
        
	* m88k.md: Two new patterns, to match (HIGH (UNSPEC (..))) and
	(LO_SUM (reg) (UNSPEC (..)))  as generated above.

	* m88k.h: (GO_IF_LEGITIMATE_ADDRESS) Reject invalid PIC addresses.

Tue Mar  1 11:00:14 1994  Doug Evans  ([e-mail])

	* configure: Fix some typos.
	* config.sub: Move comment to proper place.

Mon Feb 28 18:31:50 1994  Doug Evans  ([e-mail])

	* ns32k/encore.h (ASM_OUTPUT_ASCII): Fix typo.

Mon Feb 28 18:31:42 1994  Steve Chamberlain  ([e-mail])

	* expr.c (convert_move): Change name of truncsipsi to truncsipsi2
	to conform to existing convention, same with extendpsisi.

Mon Feb 28 08:11:55 1994  Jim Meyering  ([e-mail])

	* cccp.c (check_precompiled): Delete unused var dollar_loc.
	(pcstring_used): Delete unused var TMP.
	(write_output): Delete unused var WRITTEN.
	(assertion_lookup): Delete unused var BP.
	(pedwarn_with_file_and_line): Delete unused var I.

Mon Feb 28 07:12:24 1994  Julian Bradfield  ([e-mail])

	* m68k.md (call): Change HPUX_ASM case.
	* m68k/hp320.h (READONLY_DATA_SECTION, LEGITIMATE_PIC_OPERAND_P):
	Defined.
	(FUNCTION_PROLOGUE): Emit PIC prologue.

Mon Feb 28 06:21:18 1994  Richard Kenner  ([e-mail])

	* reload1.c (eliminate_regs, case MULT): New case, to apply
	distributive law, when needed.

	* stor-layout.c (variable_size): If global_bindings_p < 0,
	don't even make the SAVE_EXPR.

	* reg-stack.c (reg_to_stack): Use GET_RTX_CLASS.
	Clear LABEL_REFs here.
	(find_blocks): Make algorithm identical to that inreg_to_stack.
	Use GET_RTX_CLASS.
	Don't clear LABEL_REFs here.
	Build a list of labels referenced by other than jumps.
	If computed jump, mark using that list and forced_labels.
	(uses_reg_or_mem): New function, copied from flow.c.

	* optabs.c (expand_binop): Use expand_divmod to do
	integer division for DIV of MODE_COMPLEX_INT operands.

Sun Feb 27 20:24:30 1994  Rob Austein  ([e-mail])

	* protoize.c (process_aux_info_file): Properly start over on
	file error.

Sun Feb 27 17:42:19 1994  Jim Wilson  ([e-mail])

	* expmed.c (store_split_bit_field): If OP0 is a SUBREG, then
	compute WORD from the base register, instead of from the SUBREG.
	(extract_split_bit_field): Likewise.
	(extract_bit_field): Sign-extend multiword bitfield if necessary.

	* emit-rtl.c (subreg_realpart_p): New function.
	* integrate.c (copy_rtx_and_substitute): Use subreg_realpart_p
	instead of subreg_lowpart_p for CONCAT.

	* c-pragma.c (HANDLE_PRAGMA_WEAK): Depend on ASM_OUTPUT_DEF not
	SET_ASM_OP when defining it.
	* dwarfout.c (ASM_OUTPUT_DEF): Delete definition.
	* defaults.h (ASM_OUTPUT_DEF): Add it here.
	* varasm.c (handle_pragma_weak): Depend on ASM_OUTPUT_DEF not
	SET_ASM_OP when defining it.  Use ASM_OUTPUT_DEF to output value
	instead of SET_ASM_OP and explicit ASM_OUTPUT_LABELREF calls.

	* calls.c (expand_call): Set nregs to -1 for BLKmode parameter,
	then before move_block_to_reg call set it to the type size.

	* reorg.c (try_merge_delay_insns): Success when SLOT_NUMBER ==
	NUM_SLOTS not when NEXT_TO_MATCH == 0.

	* expmed.c (store_fixed_bit_field): Adjust BITPOS so that it
	fits inside MODE before adjusting OFFSET to get an aligned address.

	* expmed.c (store_fixed_bit_field): Move float mode to integral
	mode conversion from near end of function to top of function.

	* c-typeck.c (process_init_element): Check for constructor_type
	set before dereferencing it in the string cst code.

Sun Feb 27 17:28:06 1994  Philippe De Muyter  ([e-mail])

	* m68k/mot3300.h (TARGET_DEFAULT): Default to 68020-40.
	(ASM_SPEC): New macro.
	(FUNCTION_VALUE, FUNCTION_VALUE_REGNO_P): Return pointer in a0.
	(*_LIBCALL): Use functions from sysV68's library.
	(INIT_CUMULATIVE_ARGS, FUNCTION_ARG*): Some libcalls pass
	parameters in registers.

Sun Feb 27 15:20:35 1994  Ron Guilmette  ([e-mail])

	* flags.h (id_clash_len): Now unsigned.
	(warn_larger_than, larger_than_size): New variables.
	* toplev.c: Likewise.
	(main): Support -Wlarger-than-NN.
	* c-common.c (declare_hidden_char_array): Build new type if
	warn_larger_than.
	* c-decl.c (finish_decl, finish_function): Issue warning for
	large objects, if requested.

Sun Feb 27 10:50:50 1994  Richard Kenner  ([e-mail])

	* integrate.c (expand_inline_function): Allow extra arguments
	and force their evaluation for side-effects.

	* local-alloc.c (qty_compare{,_1}): Give multi-word regs higher
	priority, as stated in the comments.
	* global.c (allocno_compare): Likewise.

	* c-common.c (binary_op_error): Initialize OPNAME.
	* c-decl.c (store_parm_decls): Initialize some vars.
	* c-lex.c (readescape): Initialize FIRSTDIG.
	* c-typeck.c (type_lists_compatible_p): Initialize NEWVAL.
	(pop_init_level): Initialize SIZE.
	(output_pending_init_elements): Initialize NEXTPOS_TREE.
	* calls.c (expand_call): Initialize OLD_PENDING_ADJ.
	* cccp.c (main, args case 'D'): Rewrite to avoid uninitialized var.
	(main, args case 'A'): Delete unused var P1.
	(rescan): Initialize STR.
	(do_xifdef, do_endif): Initialize arg to skip_to_end_of_comment.
	* expr.c (emit_move_insn): Delete unused vars.
	(emit_move_insn_1): Don't set SUBMODE unless used.
	(expand_builtin, case BUILT_IN_SAVEREGS): Clean up uses of VALREG
	and SAVED_VALREG.
	* final.c (final_scan_insn): Always set OPS and use alloca.
	* gcc.c (execute): Initialize PROG.
	* optabs.c (emit_float_lib_cmp): Init LIBFUNC; abort if not reset.
	* stmt.c (expand_start_bindings): Properly set NOTE if bytecode.
	* tree.c (make_node, stabilize_reference_1): Abort if unknown class.
	* varasm.c (make_decl_rtl): Initialize NAME and abort if not reset.

Sat Feb 26 13:09:37 1994  Doug Evans  ([e-mail])
	
	* mips-tfile.c (fatal, error): Don't use prototypes
	ifndef HAVE_VPRINTF.

	* fixincludes: Fix including of machine/r3_cpu.h and machine/r4_cpu.h
	in machine/cpu.h on Ultrix 4.3.

Sat Feb 26 07:14:04 1994  Richard Kenner  ([e-mail])

	* rs6000.h (MASK_NO_SUM_IN_TOC, TARGET_NO_SUM_IN_TOC): New macros.
	(MASK_MINIMAL_TOC): Change bit value.
	(TARGET_SWITCHES): Add -mno-sum-in-toc; use -mfull-toc instead
	of -mnormal-toc, other minor changes.
	* rs6000.md (movsi): If -mno-sum-in-toc, do addition of
	symbol + const.

	* jump.c (rtx_renumbered_equal_p): Fix bug in comparing SUBREGs
	and REGs.
	Two commutative operations are equal if the operands are in the
	opposite order.

	* function.c (fixup_var_refs_insn): Delete CLOBBER of VAR.  If
	VAR is being assigned into by a libcall sequence, remove the
	libcall notes.

	* cse.c (count_reg_usage, case SET): If SRC has side-effects,
	count a usage of DEST in it.

	* expr.c (store_expr): In promoted TARGET case, if EXP is a
	volatile MEM and WANT_VALUE is nonzero, only reference the MEM once.
	Return TARGET if it is a hard register; clean up return code.

	* tree.c (substitute_in_type, case REAL_TYPE): Fix typo in
	previous change.

Fri Feb 25 06:42:20 1994  Richard Kenner  ([e-mail])

	* tree.c (substitute_in_type, case REAL_TYPE): Allow
	TYPE_{MIN,MAX}_VALUE to be unassigned.

	* combine.c (if_then_else_cond): Fix typo in narrowing of a SUBREG.

	* alpha.md (neg[sd]f2): Use %R1 consistently.

	* reload.c (find_reloads): Don't restrict class of multiword
	operand to preferred class.
	(find_reloads_address_1): Rework to use `switch'.
	Reload a SUBREG of a hard reg as a unit.

	* alpha.md (mul*): Disallow multiply by constant.

Thu Feb 24 21:20:11 1994  Ian Lance Taylor  ([e-mail])

	* fixinc.sco: In <prototypes.h>, fix prototypes of getcwd and
	link.

Thu Feb 24 13:06:05 1994  Richard Stallman  ([e-mail])

	* config.sub: Don't force os=-hpux for hp9k2... and hp9k3...

Thu Feb 24 11:17:11 1994  Jeffrey A. Law  ([e-mail])

	* configure (hppa*-*-osf*): Renamed from hppa*-*-mach.  Target
	filenames changed accordingly.

Thu Feb 24 08:54:27 1994  Bob Miorelli  (pwa-b![e-mail])

	* lynx.h (LIB_SPEC, LINK_SPEC): Add missing blanks.

Thu Feb 24 08:42:07 1994  Ian Willis  ([e-mail])

	* i386/sco.h, i386/scodbx.h (HANDLE_SYSV_PRAGMA): Define.

Thu Feb 24 07:31:44 1994  Richard Kenner  ([e-mail])

	* loop.c (maybe_eliminate_biv_1): Ignore GIV if it isn't
	always computed.

	* loop.c (scan_loop, strength_reduce): Go back to LOOP_TOP, not
	its NEXT_INSN (in case SCAN_START == LOOP_TOP).

Wed Feb 23 07:30:14 1994  Richard Kenner  ([e-mail])

	* reload1.c (choose_reload_regs): If EQUIV is a SUBREG, 
	make a new REG.

	* c-common.c (decl_attributes): Warn if attribute will be ignored.
	Allow `noreturn', `volatile', and `const' on object of type
	pointer to function.
	Always give decl with error or warning.
	* calls.c (expand_call): Functions may be const or volatile from
	their type.

Tue Feb 22 11:00:12 1994  Ian Lance Taylor  ([e-mail])

	* fixincludes: In #[el]if, put double underscores around M32,
	m88k, pdp11, tower[_0-9]*, u370, u3b[0-9]*.  From Kaveh R.
	Ghazi.

	* fixinc.sco: Fix prototype declaration of utime in <sys/times.h>;
	it's broken in SCO 3.2v4.0.

Tue Feb 22 08:14:28 1994  Matthias Pfaller  ([e-mail]) 

	* ns32k.h (FUNCTION_{PROLOGUE,EPILOGUE}): %$ is not supported
	in fprintf.
	(ADJSP): New macro to resolve %$.

	* pc532.h (FRAME_POINTER_REQUIRED): Deleted.
	* pc532-mach.h (FRAME_POINTER_REQUIRED): Moved to here.
	(DEFAULT_PCC_STRUCT_RETURN): Deleted; redundant.

	* ns32k.c (output_move_dconst): New function.
	* ns32k.h (output_move_dconst): New declaration.
	* ns32k.md: Added peephole patterns for stack adjustments followed
	by QI/HI pushes.
	(movsi): Use output_move_dconst for TARGET_32532.
	(ffs): New patterns.

	* ns32k.c (global_symbolic_reference_mentioned_p): New function.
	(print_operand_address): Allow pc-relative mode not only
	for {LABEL, SYMBOL}_REF but for CONST too. If compiling PIC,
	transform "symbol+const(Rx)" to "const(symbol(sb))[Rx:b]".
	* ns32k.h (OVERRIDE_OPTIONS): New macro to support PIC.
	(FUNCTION_PROLOGUE): Save/Load sb when compiling PIC.
	(FUNCTION_EPILOGUE): Restore sb when compiling PIC.
	(INITIAL_FRAME_POINTER_OFFSET): Take saved sb into account when PIC.
	(LEGITIMATE_CONSTANT_P, GO_IF_LEGITIMATE_ADDRESS):
	Set current_function_uses_pic_offset_table if P uses a global
	symbolic reference.
	(ENCODE_SECTION_INFO): New macro to support PIC.

Tue Feb 22 07:59:27 1994  Torbjorn Granlund  ([e-mail])

	* alpha.md (divsi3): Emit all RTL from RTL template.
	(udivsi3, modsi3, umodsi3, divdi3, udivdi3, moddi3, umoddi3): Likewise.

Tue Feb 22 07:21:31 1994  Samuel A. Figueroa  ([e-mail])

	* i386/os2.h (LINK_SPEC, LIB_SPEC): New macros.
	(PATH_SEPARATOR): Delete from here.
	* i386/xm-os2.h (PATH_SEPARATOR): Add to here.

Mon Feb 21 17:48:39 1994  Jim Wilson  ([e-mail])

	* mips-tfile.c (fatal, error): Add ! HAVE_VPRINTF versions.

Sun Feb 20 16:53:02 1994  Ted Lemon  ([e-mail])

	* mips.c (mips_move_2words): Check for TARGET_FLOAT64 != TARGET_64BIT.
	(override_options): Don't override MASK_64BIT; don't allow -gp64
	without -mips3.
	* mips.h: Update mips3 comments.
	(TARGET_OPTIONS): Add gp64 and gp32.
	(SECONDARY_MEMORY_NEEDED): Don't allow fp<->gp copy if TARGET_FLOAT64
	!= TARGET_64BIT.
	(CC1_SPEC): Generate correct -mfp* and -mgp* from -mips*
	* mips.md (movdf_internal1): Disable if TARGET_FLOAT64 != TARGET_64BIT.
	(movdf_internal1a):  New pattern.
	* osfrose.h (CC1_SPEC): Update as above.

Sun Feb 20 15:40:45 1994  Jim Wilson  ([e-mail])

	* sparc.h (HARD_REGNO_MODE_OK): Update comment.

	* iris5.h (OBJECT_FORMAT_ELF): Add comments.
	* configure (mips-sgi-irix5): Use collect.

Sat Feb 19 14:25:41 1994  Ian Lance Taylor  ([e-mail])