changelog

gcc库的原代码,对编程有很大帮助.

	* xm-pa.h (HAVE_STRERROR): Define.
	(__BSD_NET2__): Define.

Wed Jul 26 09:10:25 1995  Jason Merrill  <[e-mail]>

	* expr.c (preexpand_calls): Don't look past a CLEANUP_POINT_EXPR.

Wed Jul 26 08:43:42 1995  Jim Wilson  <[e-mail]>

	* cse.c (cse_insn): When do special handling for (set REG0 REG1),
	must delete REG_EQUAL note from insn if it mentions REG0.

	* loop.c (find_and_verify_loops): When moving blocks of code, verify
	that the just destination is not in an inner nested loop.
	(mark_loop_jump): Don't mark label as loop exit if it jumps to
	an inner nested loop.

Wed Jul 26 08:40:31 1995  Paul Eggert  <[e-mail]>

	* cccp.c (do_include, read_name_map): Omit leading "./" and
	trailing "/" when it makes sense.
	(skip_redundant_dir_prefix): New function.

Wed Jul 26 08:36:41 1995  Michael Meissner  <[e-mail]>

	* stmt.c (emit_nop): Do not emit a nop if there is a single
	insn before a label or at the start of a function.

Wed Jul 26 08:21:21 1995  Doug Evans  <[e-mail]>

	* Makefile.in (gfloat.h): Delete previous copy before updating.

Wed Jul 26 08:18:29 1995  Roland McGrath  <[e-mail]>

	* Makefile.in (STAGESTUFF): Add stamp-crtS.
	(crtbeginS.o, crtendS.o, stamp-crtS): New rules; just like
	crtbegin.o et al, but compiled using -fPIC.
	* configure (*-*-gnu*): Add crtbeginS.o and crtendS.o to $extra_parts.

Wed Jul 26 08:11:52 1995  Michael Gschwind  <[e-mail]>

	* pdp11.md: Fixed typos ('bhos' -> 'bhis').

Wed Jul 26 08:05:41 1995  Jim Wilson  <[e-mail]>

	* hp320.h, m68k.h, m68kv4.h (LEGITIMATE_PIC_OPERAND_P): Reject
	CONST_DOUBLE with MEM with invalid pic address.
	* reload1.c (real.h): Include it.
	* Makefile.in (reload1.o): Depends on real.h.

Wed Jul 26 07:58:22 1995  Ian Lance Taylor  <[e-mail]>

	* gcc.c (MULTILIB_DIRS): Provide default if not defined.
	(multilib_defaults): New static variable.
	(default_arg): New static function.
	(set_multilib_dir): Ignore default arguments.
	(print_multilib_info): Ignore entries which use default arguments.

Tue Jul 25 10:06:09 1995  Michael Meissner  <[e-mail]>

	* rs6000.md (allocate_stack): Don't copy the LR register to
	the new stack end.
	* rs6000.c (rs6000_stack_info): Correctly store the LR in
	the caller's frame, not the current frame, for V.4 calls.
	* rs6000/eabi.asm (_save*, _rest*): Provide all mandated V.4 save
	and restore functions, except for the save*_g functions which
	return the GOT address.

Fri Jul 21 14:24:25 1995  Michael Meissner  <[e-mail]>

	* rs6000/eabi.h (__eabi): Load up r13 to be the small data
	pointer, unless -mrelocatable.

	* rs6000/aix3newas.h (LINK_SPEC): Import machine independent
	functions if -mcpu=common.
	* rs6000/milli.exp: Import file referenced in aix3newas.h.

	* rs6000/eabi.asm (__eabi): Support for fixing up user initialized
	pointers when -mrelocatable is used.
	* rs6000/eabi.h (ASM_OUTPUT_INT): Record any pointers initialized
	by the user if -mrelocatable, to be fixed up by __eabi.
	(CONST_SECTION_ASM_OP): If -mrelocatable, put read-only stuff in .data,
	not .rodata, to allow user initialized pointers to be updated by __eabi.

	* rs6000.h (TARGET_SWITCHES): Add -mdebug-{stack,arg}.
	(TARGET_{ELF,NO_TOC,TOC}): Add defaults for non system V.
	(rs6000_stack): New structure to describe stack layout.
	(RS6000_{REG_SAVE,SAVE_AREA,VARARGS_*}): New macros used to
	support both AIX and V.4 calling sequences.
	(FP_ARG_*, GP_ARG_*): Ditto.
	(FP_SAVE_INLINE): Ditto.
	(STARTING_FRAME_OFFSET): Modify to support both AIX and V.4
	calling sequences.
	(FIRST_PARM_OFFSET): Ditto.
	(REG_PARM_STACK_SPACE): Ditto.
	(STACK_POINTER_OFFSET): Ditto.
	(FUNCTION_ARG_REGNO_P): Ditto.
	({,INIT_}CUMULATIVE_ARGS): Ditto.
	(LEGITIMATE_LO_SUM_ADDRESS_P): Ditto.
	(FUNCTION_ARG{,_ADVANCE,PARTIAL_NREGS,PASS_BY_REFERENCE}): Ditto.
	(SETUP_INCOMING_VARARGS): Ditto.
	(EXPAND_BUILTIN_SAVEREGS): Ditto.
	(CAN_ELIMINATE): Ditto.
	(INITIAL_ELIMINATION_OFFSET): Ditto.
	(LEGITIMATE_CONSTANT_POOL_{BASE,ADDRESS}_P): Ditto.
	(GO_IF_{LEGITIMATE_ADDRESS,MODE_DEPENDENT_ADDRESS}): Ditto.
	(LEGITIMIZE_ADDRESS): Ditto.
	(CONST_COSTS): Ditto.
	(ASM_OUTPUT_SPECIAL_POOL_ENTRY_P): Ditto.
	(ASM_OUTPUT_REG_{PUSH,POP}): Use reg_names to print registers.
	(function declarations): Add new rs6000.c function declarations,
	and delete decls of deleted functions.
	(SHIFT_COUNT_TRUNCATED): Parenthesize the expression.
	
	* rs6000.c (init_cumulative_args): New function to support AIX
	and V.4 calling sequences.
	(function_arg{,_advance,partial_nregs,pass_by_reference}): Ditto.
	(setup_incoming_varargs): Ditto.
	(expand_builtin_saveregs): Ditto.
	(rs6000_stack_info): Ditto.
	(debug_stack_info): Ditto.
	(direct_return): Changes to support AIX and V.4 calling sequences.
	(first_reg_to_save): Ditto.
	(svr4_traceback): Ditto.
	(output_{prolog,epilog}): Ditto.
	(print_operand): Use reg_names to print registers.  Add support
	for V.4 HIGH/LO_SUM address modes.
	(must_save_cr): Function deleted, in rewrite of AIX/V.4 calling
	sequence support.
	(rs6000_sa_size): Ditto.
	(rs6000_pushes_stack): Ditto.
	(output_toc): Add abort if no toc.

	* rs6000.md (call insns): Add a new argument to flag a V.4
	function needs to set bit 6 of the CR.
	(elf_{low,high}): New V.4 functions to create addresses via HIGH
	and LO_SUM patterns.
	(movsi): Use elf_{low,high} if appropriate.
	(mov{si,di}_update): Name these patterns for allocate_stack.
	(allocate_stack): Support for V.4 stack layout.
	(sync): New pattern for V.4 trampolines to issue the sync
	instruction.
	
	* rs6000/sysv4.h (TARGET_SWTICHES): Add -mcall-{aix,sysv}, and
	-mprototype.  Remove separate flag bit for -mno-toc.
	(SUBTARGET_OVERRIDE_OPTIONS): Don't test for -mno-toc.
	(FP_ARG_*): Adjust for V.4 calling sequences.
	(RS6000_*): Ditto.
	(FP_SAVE_INLINE): Ditto.
	(toc_section): Eliminate use of AIX style full TOC.
	(TRAMPOLINE_{TEMPLATE,SIZE}): Redefine for V.4 support.
	(INITIALIZE_TRAMPOLINE): Ditto.
	
	* rs6000/eabi.h (CPP_SPEC): Define _CALL_SYSV or _CALL_AIX,
	depending on whether -mcall-sysv or -mcall-aix was used.
	* rs6000/eabile.h (CPP_SPEC): Ditto.
	* rs6000/sysv4le.h (CPP_SPEC): Ditto.

	* rs6000/t-eabigas (MULTILIB_{OPTIONS,DIRNAMES}): Delete no-toc
	libraries, explicit big endian libraries.
	* rs6000/t-ppcgas (MULTILIB_{OPTIONS,DIRNAMES}): Ditto.
	
	* rs6000/t-eabiaix: New file for eabi, using -mcall-aix as the
	default.
	* rs6000/eabiaix.h: Ditto.

	* rs6000/t-eabilegas: New file for eabi on little endian systems.
	* rs6000/t-ppclegas: New file for V.4 on little endian systems.

	* rs6000/t-rs6000 (MULTILIB_{OPTIONS,DIRNAMES}): Build libgcc.a
	for -mcpu=common.

	* configure (powerpc-*-eabiaix): New configuration for defaulting
	to old-style AIX calling sequence.
	(powerpcle*): Use new t-{eabi,ppc}legas files, to avoid building
	explicit little endian multilib libraries.

Fri Jul 21 13:23:06 1995  Richard Kenner  ([e-mail])

	* toplev.c (main): Don't define sbrk #ifdef __alpha__.

Tue Jul 18 19:23:44 1995  Paul Eggert  <[e-mail]>

	* cccp.c (do_include): Prefix -H output lines with spaces, not dots.
	(output_dots): Remove.

	* cccp.c (main): cplusplus_comments now defaults to 1.
	But clear it if	-traditional or the new option -lang-c89 is given.
	* gcc.c (default_compilers, cpp): Specify -lang-c89 if -ansi is given.
	This turns off C++ comment recognition.

Tue Jul 18 19:16:38 1995  Jim Wilson  <[e-mail]>

	* va-sparc.h (va_arg): Add support for 128 bit long double type.

Tue Jul 18 19:11:18 1995  Jorn Rennecke  ([e-mail])

	* c-common.c (decl_attributes, case A_ALIGNED): Handle is_type
	case properly.

Tue Jul 18 19:03:02 1995  Richard Kenner  ([e-mail])

	* fold-const.c (fold, case CONVERT_EXPR): Don't merge conversions
	if outer is to handle a type with differing precision.

Mon Jul 17 14:37:35 1995  Pat Rankin  ([e-mail])

	* vax/vms.h (HAVE_ATEXIT): Define.
	(DO_GLOBAL_CTORS_BODY): Don't call atexit; let __do_global_ctors do it.
	* vax/xm-vms.h (HAVE_VPRINTF): Define.

Mon Jul 17 06:41:19 1995  Richard Kenner  ([e-mail])

	* c-typeck.c ({unsigned,signed}_type): Handle intXX_type_node types.

	* xm-alpha.h (sbrk): Add declaration.

	* convert.c (convert_to_integer): If TYPE is a enumeral type or
	if its precision is not the same as the size of its mode, 
	convert in two steps.

	* m68k.md (tstdi, cmpdi): Use match_scratch, not match_operand.

Fri Jul 14 19:23:42 1995  Andreas Schwab  <[e-mail]>

	* c-decl.c (field_decl_cmp): Rewritten to make sure that a null
	name always sorts low against other names.
	* c-typeck.c (lookup_field): Change name comparison to match what
	field_decl_cmp does.

Fri Jul 14 18:46:24 1995  Michael Meissner  <[e-mail]>

	* rs6000.md (movsi): Convert a CONST_DOUBLE into a CONST_INT of
	the low part.

Fri Jul 14 18:30:52 1995  Doug Evans  <[e-mail]>

	* toplev.c (main): Reword dwarf/c++/-g warning.

Fri Jul 14 18:19:34 1995  Richard Kenner  ([e-mail])

	* expr.h (NO_DEFER_POP): Remove last change.
	* expr.c (stor_expr): Force stack adjust before NO_DEFER_POP.
	(expand_expr, case COND_EXPR): Likewise.
	* stmt.c (expand_start_stmt_expr): Likewise.

Fri Jul 14 07:58:35 1995  Jim Wilson  <[e-mail]>

	* function.c (struct temp_slot): New fields base_offset, full_size.
	(assign_stack_temp): For !FRAME_GROWS_DOWNWARD, set p->size to size.
	Set new fields base_offset and full_size.
	(combine_temp_slots): Use new fields base_offset and full_size instead
	of slot and size.

	* loop.c (loop_number_exit_count): New global variable.
	(loop_optimize): Allocate space for it.
	(find_and_verify_loops, mark_loop_jump): Set it.
	(strength_reduce, check_dbra_loop): Use loop_number_exit_count
	instead of loop_number_exit_labels.
	* loop.h (loop_number_exit_count): Declare it.
	* unroll.c (find_splittable_{regs,givs}, final_[bg]iv_value): Use
	loop_number_exit_count instead of loop_number_exit_labels.
	(reg_dead_after_loop): Check loop_number_exit_count, and fail
	if the count doesn't match loop_number_exit_labels.

	* cse.c (cse_insn): Ifdef out code that pre-truncates src_folded.

	* sparc.md (sethi_di_sp64): Return null string at end.

	* function.h (struct function): Add stdarg field.
	* function.c (current_function_stdarg): New global variable.
	(push_function_context_to): Save it.
	(pop_function_context_from): Restore it.
	(assign_parms): Set it.
	(init_function_start): Clear it.
	* output.h (current_function_stdarg): Declare it.
	* i960.md: Modify all patterns which handle stores to memory to also
	check current_function_varargs and current_function_stdarg.

	* reorg.c (fill_simple_delay_slots): When trying to take instruction
	from after the branch, don't continue past target label.  Local
	variables passed_label and target_uses are no longer necessary.

Thu Jul 13 19:30:04 1995  Jeff Law  ([e-mail])

	* pa.c (output_bb): Fix error in long backwards branch with
	nullified delay slot.

Thu Jul 13 19:26:13 1995  Jim Wilson  <[e-mail]>

	* expmed.c (SHIFT_COUNT_TRUNCATED): Use #ifdef not #if.

Mon Jul 10 20:16:44 1995  Paul Eggert  <[e-mail]>

	* cccp.c (rescan): Don't address outside of array when
	preprocessing C++ comments.

Mon Jul 10 20:05:46 1995  Michael Meissner  <[e-mail]>

	* rs6000.c (expand_block_move): Remove #if 0 conditionals
	against using larger block moves.

	* t-rs6000 (EXTRA_PARTS): Copy milli.exp to release dir.
	(milli.exp): Copy to build dir from machine dependend dir.

Mon Jul 10 20:03:29 1995  Richard Earnshaw ([e-mail])

	* arm.md (matcher for (shiftable_op (cond-exp) (reg))): If
	shiftable_op is minus, then subtract from zero when cond fails.

Mon Jul 10 19:58:26 1995  John F. Carr <[e-mail]>

	* sparc.h (SELECT_SECTION): Use TREE_CODE_CLASS instead of directly
	referencing tree_code_type.
	
Mon Jul 10 19:54:31 1995  Jim Wilson  <[e-mail]>

	* protoize.c (reverse_def_dec_list): Delete const qualifiers from
	local variables, and delete casts which were casting away const.

Mon Jul 10 19:14:39 1995  Richard Kenner  ([e-mail])

	* c-lang.c (finish_file): Add missing parm to start_function call.

	* jump.c (jump_optimize): Pass outer_code arg to rtx_cost.

	* varasm.c (assemble_name, bc_assemble_integer): Call
	bc_emit_labelref with proper args.

	* function.c (setjmp_args_warning): Remove bogus arg.

Mon Jul 10 18:20:54 1995  Fergus Henderson  ([e-mail])

	* gcc.c (p{fatal,error}_with_name, perror_exec): Quote filename.

Mon Jul 10 18:12:51 1995  Gran Uddeborg ([e-mail])

	* i386/iscdbx.h (STARTFILE_SPEC): Handle -Xp.

Wed Jul  5 02:42:17 1995  Per Bothner  ([e-mail])

	* cpphash.h (enum node_type):  Remove unneeded and non-standard
	forward declaration.

Sat Jul  1 20:15:39 1995  Jim Wilson  <[e-mail]>

	* mips/t-mips, mips/t-mips-gas (MULTILIB_*, LIBGCC, INSTALL_LIBGCC):
	Delete.

	* sparc/sol2.h (LINK_SPEC): Revert March 16 change.  Do not add -R
	for each -L.
	
	* collect2.c (libcompare): Verify that file name extensions are valid.
	Put files with invalid extension