changelog

gcc库的原代码,对编程有很大帮助.

Fri Aug 25 18:33:27 1995  Craig Burley  ([e-mail])

	* toplev.c (report_error_function): Don't attempt to use input
	file stack to identify nesting of #include's if file name oflocation
	diagnosed is not same as input_filename.

Fri Aug 25 07:31:47 1995  Richard Kenner  ([e-mail])

	* integrate.c (output_inline_function): Switch to function obstack.

Mon Aug 21 13:29:54 1995  J"orn Rennecke ([e-mail])

	* i386.c (arithmetic_comparison_operator): New function.
	(print_operand): Take into account that overflow flag is not
	set the same as after a compare instruction.
	* i386.md (decrement_and_branch_until_zero): Use
	arithmetic_comparison_operator to decide if there is comparison
	suitable to be expressed by condition code from an arithmetic op.

Mon Aug 21 13:26:13 1995  Philippe De Muyter ([e-mail])

	* m68k.md (adddi3, subdi3): "&" added to clobber's constraints.

Mon Aug 21 12:11:14 1995  Jim Wilson  <[e-mail]>

	* t-sparclite (MULTILIB_*, LIBGCC, INSTALL_LIBGCC): Define.

	* sh.md (movdi-1, movdf-1): Make conditional on reload_completed,
	delete conditions checking for pseudo registers and Q addresses.
	Add code to handle SUBREG.

	* local-alloc.c (wipe_dead_reg): Make a register mentioned in a
	REG_INC note die after the instruction.

	* m68k.md: For all dbra pattern, change constraint from 'g' to 'd*g'.

	* Makefile.in: (underscore.c): Rename rule to stamp-under, and
	touch stamp-under at the end.  Add new rule for underscore.c that
	depends on stamp-under.

	* sh.c (reg_unused_after): For a SEQUENCE, make sure all insns are
	safe before returning 1.

	* sh.h (PROMOTE_FUNCTION_ARGS, PROMOTE_FUNCTION_RETURN): Define.

	* sh.c (output_stack_adjust): Add new argument reg.  Use it instead
	of stack_pointer_rtx.
	(sh_expand_prologue, sh_expand_epilogue): Pass new argument to
	output_stack_adjust.

Sat Aug 19 17:34:15 1995  Jim Wilson  <[e-mail]>

	* sparc/gmon-sol2.c (_mcount): Define.
	* sparc/sol2.h (STARTFILE_SPEC, ENDFILE_SPEC): Delete superfluous
	-pg tests.
	(LINK_SPEC): Add libp directories to -Y when -pg.

	* unroll.c (calculate_giv_inc): Handle increment computed by ASHIFT.

Sat Aug 19 17:28:56 1995  Philippe De Muyter ([e-mail])

	* m68k.md (subdi3): Should not be commutative.
	(one_cmpldi2): Fixed typo with register operand.

Sat Aug 19 17:20:43 1995  Michael Meissner  <[e-mail]>

	* rs6000.c (output_prolog): Fixup code to set stack pointer
	if stack size > 32k.
	* rs6000.md (sync_isync): Renamed from sync; added an isync insn
	after the sync to properly deal with PowerPC's with split I/D caches.
	* sysv4.h (INITIALIZE_TRAMPOLINE): Sync function now named sync_isync.

Sat Aug 19 17:07:09 1995  Doug Evans  <[e-mail]>

	* h8300.h (STATIC_CHAIN_REGNUM): Use r3.
	(REGISTER_NAMES): Print r7 as sp.
	(ADDITIONAL_REGISTER_NAMES): Recognize r7.
	(ASM_OUTPUT_ALIGN): Alignment is power of 2.
	* h8300.md (fancy_btst,fancy_btst1): Branch target must be
	operand 0 for length attribute to work.

Sat Aug 19 16:43:11 1995  Paul Franklin  <[e-mail]>

	* assert.h: Declare __eprintf with attribute noreturn.

Sat Aug 19 16:40:12 1995  Jason Merrill  <[e-mail]>

	* stddef.h: Don't define wchar_t if __cplusplus is defined.

Tue Aug 15 18:01:01 1995  Paul Eggert  <[e-mail]>

	* cccp.c (warning_with_line): Fix typo in declaration when
	!HAVE_VPRINTF and defined (__STDC__).

Tue Aug 15 17:57:54 1995  Stephen L Moshier <[e-mail]>

	* real.c (ediv, emul): Set sign bit of IEEE -0.0 result.

Tue Aug 15 17:49:47 1995  Richard Kenner  ([e-mail])

	* expr.c (safe_from_p): Only safe if EXP is variable-size and X
	is BLKmode.

	* stmt.c (fixup_gotos): When some fixups done, reset to point
	to next instead of zeroing TREE_VALUE, which may be shared.

Mon Aug 14 09:15:45 1995  Doug Evans  <[e-mail]>

	* m68k/m68kemb.h (STARTFILE_SPEC): Define as empty.

Mon Aug 14 09:08:57 1995  Pat Rankin  <[e-mail]>

	* vax.c (vms_check_external): Update `pending_head' properly
	when the first list element is removed.

Mon Aug 14 09:01:32 1995  Jeffrey A. Law  <[e-mail]>

	* pa.md (call expanders): Emit a blockage insn after restoring
	%r19 when generating PIC.

Sun Aug 13 21:58:49 1995  Richard Kenner  ([e-mail])

	* toplev.c (main): Change text of unsupported -g option warning.

Sun Aug 13 21:47:57 1995  Andrew McCallum  <[e-mail]>

	* objc/selector.c (sel_get_any_typed_uid): New function.
	* objc/objc-api.h (sel_get_any_typed_uid): Declare new function.

Sun Aug 13 21:43:17 1995  John Carr  <[e-mail]>

	* c-typeck.c (c_expand_asm_operands): Check for read-only output
	operand where the variable is read-only but the type is not.

Sun Aug 13 21:16:12 1995  David Edelsohn  <[e-mail]>

	* rs6000.c (direct_return): Epilogue required if CR saved.

Sun Aug 13 19:09:25 1995  Jeff Law  ([e-mail])

	* configure (hppa1.?-hp-hpux10): Recognize and treat just like hpux9.

Sun Aug 13 19:07:23 1995  Doug Evans  <[e-mail]>

	* i960.md (movdi matchers): Fix src/dest order in unaligned
	reg->reg case.

Sun Aug 13 18:49:01 1995  DJ Delorie  <[e-mail]>

	* i386/xm-dos.h (HAVE_STRERROR): New definition.

	* msdos/configur.bat: Add missing carriage return.

Sun Aug 13 18:40:55 1995  Andrew Cagney  <[e-mail]>

	* Makefile.in (USER_H): Add va-ppc.h.

Sun Aug 13 18:36:17 1995  M. Warner Losh  <[e-mail]>

	* stmt.c (expand_asm_operands): Type '0'..'4' operands may
	allow regs, so move them to the default case. 

Sun Aug 13 18:32:35 1995  Paul Eggert  <[e-mail]>

	* cccp.c (warning_with_line): New function.
	(trigraph_pcp): Use it, to avoid reporting line number.
	(vwarning_with_line): Don't report line number if zero.

Sun Aug 13 18:23:08 1995  Jason Merrill  <[e-mail]>

	* toplev.c (vmessage): Support four arguments.

Sun Aug 13 18:19:51 1995  Michael Meissner  <[e-mail]>

	* ginclude/stdarg.h: Add ppc svr4 calling sequence support.
	* ginclude/varargs.h: Likewise.
	* ginclude/va-ppc.h: New file.

Sun Aug 13 18:05:20 1995  Michael Gschwind  <[e-mail]>

	* configure (pdp-*-*): Add support for t-pdp11.
	* t-pdp11: New file.
	* Makefile.in (LIBGCC2_CFLAGS): Add TARGET_LIBGCC2_CFLAGS.

Sun Aug 13 14:50:58 1995  Jim Wilson  <[e-mail]>

	* final.c (final_start_function): Always call sdbout_begin_function
	and xcoffout_begin_function, even if no line number info.

	* mips/abi64.h (SETUP_INCOMING_VARARGS): In if statement, only
	subtract one for stdarg.  Don't subtract PRETEND_SIZE from
	argument pointer when calculating stack address.
	* mips.h (INITIAL_ELIMINATION_OFFSET): For 64 bit ABI, subtract
	current_function_pretend_args_size when converting from argument
	pointer.
	* va-mips.h (va_start): For stdarg, delete separate define for
	64 bit ABI.  For varargs, don't subtract 64, and only add -8 when
	all argument registers are used.

	* gcc.c (main): When concat gcc_exec_prefix and
	standard_startfile_prefix, put machine_suffix in the middle.

	* iris6.h (INIT_SECTION_ASM_OP): Don't define.
	(LD_INIT_SWITCH, LD_FINI_SWITCH, HAS_INIT_SECTION): Don't undef.
	(ASM_OUTPUT_CONSTRUCTOR, ASM_OUTPUT_DESTRUCTOR): Ifdef out.
	* configure (mips-sgi-irix6, mips-sgi-irix5cross64): Define
	use_collect2 to yes.

	* combine.c (move_deaths): When have a multi-reg hard register,
	if don't find a note, then recur for each individual hard register.

	* cse.c (set_nonvarying_address_components): Handle addresses
	which are the sum of two constant pseudo regs.
	(cse_rtx_addr_varies_p): Likewise.

	* Makefile.in (gfloat.h): Add a - before the rm command.

	* loop.c (find_and_verify_loops): Set dest_loop only if
	JUMP_LABEL (insn) is non-zero.

Mon Jul 31 14:31:53 1995  Ian Lance Taylor  <[e-mail]>

	* fixincludes: Avoid clobbering VxWorks drv/netif/if_med.h file.

Sat Jul 29 16:21:42 1995  Jason Merrill  <[e-mail]>

	* collect2.c: (XCOFF_SCAN_LIBS): Define if OBJECT_FORMAT_COFF and
	XCOFF_DEBUGGING_FORMAT.
	(SCAN_LIBRARIES): Also define if XCOFF_SCAN_LIBS.

Sat Jul 29 16:19:42 1995  Stuart D. Gathman  <[e-mail]>

	* collect2.c (scan_libraries): Implement for AIX.

Sat Jul 29 09:59:33 1995  Michael Gschwind  <[e-mail]>

	* configure: (pdp11-*-bsd) New target.
	* 2bsd.h: New file.

	* pdp11.c (output_move_double): Handle CONST_INT parameters properly. 
	* pdp11.h (RTX_COSTS): Fill in missing default values.
	* pdp11.md (truncdfsf2, extendsfdf2, floatsidf2, fix_truncdfsi2):
	Allow register parameters, required by gcc to generate correct code. 
	* xm-pdp11.h: Include tm.h.

Sat Jul 29 09:55:17 1995  Andreas Schwab  <[e-mail]>

	* configure (m68k-*-linux*aout*, m68k-*-linux*): New targets.
	* m68k/linux-aout.h, m68k/linux.h, m68k/t-linux, m68k/xm-linux.h: New.
	* m68k.md [USE_GAS]: Output `jbsr' instead of `jsr' for normal
	function calls and `bsr.l' instead of `bsr' for pic function calls.

Sat Jul 29 09:44:13 1995  Jim Wilson  <[e-mail]>

	* sh.h (CAN_DEBUG_WITHOUT_FP): Comment out.

	* reload.c (find_reloads_address_1, case PLUS): When handle SUBREG,
	add SUBREG_WORD offset to SUBREG_REG register number.
	(find_reloads_address_1, case SUBREG): If a pseudo register inside
	a SUBREG is larger than the class, then reload the entire SUBREG.
	* sh.h (SUBREG_OK_FOR_INDEX_P): New macro.
	(INDEX_REGISTER_RTX_P): Use it.

Sat Jul 29 09:33:19 1995  Doug Evans  <[e-mail]>

	* mips/netbsd.h (CPP_SPEC): Fix typo.

	* configure (a29k-*-vxworks*): Define extra_parts for crt{begin,end}.o.
	* t-a29k, t-a29kbase, t-vx29k ({,CROSS_}LIBGCC1): Define as empty.

Sat Jul 29 09:15:17 1995  Jeffrey A. Law  <[e-mail]>

	* pa/lib2funcs.asm (gcc_plt_call): Rewrite to avoid the need
	for being called by _sr4export.  Inline expand $$dyncall to
 	avoid the need for long-call and PIC support.

Sat Jul 29 07:30:04 1995  Oliver Kellogg  ([e-mail])

	* ms1750.inc (ucim.m, ucr.m, uc.m): New.
	* 1750a.md (cmpqi): Account for unsigned comparisons.
	(rotrqi3, rotrhi3): Reworked.
	* 1750a.c (notice_update_cc): INCM and DECM set condition codes.
	(unsigned_comparison_operator, next_cc_user_is_unsigned): New fcns.
	* 1750a.h (FUNCTION_EPILOGUE): Local variables freed from SP, not FP.
	(ASM_OUTPUT_BYTE): Make distinct from ASM_OUTPUT_CHAR.
	(ASM_OUTPUT_CONSTRUCTOR): Add FILE arg to assemble_name.

Fri Jul 28 09:40:07 1995  Jeffrey A. Law  <[e-mail]>

        * pa.h (DO_GLOBAL_DTORS_BODY): Use an asm statement to keep optimizer
	from deleting an assignment it believes dead.

Fri Jul 28 08:47:51 1995  Jim Wilson  <[e-mail]>

	* unroll.c (unroll_loop): When preconditioning, output code to
	execute loop once if initial value is greater than or equal to final
	value.

	* configure (lang_specs_files, lang_options_files): Add $srcdir to
	file names when adding them to these variables.

	* c-typeck.c (pointer_int_sum): Don't distribute if intop is unsigned
	and not the same size as ptrop.

	* function.c (assign_stack_temp): When split a slot, set base_offset
	and full_size in the newly created slot.
	(combine_temp_slots): Update full_size when slots are combined.

	* sh.c (reg_unused_after): New function.
	* sh.md (define_peephole): Add peepholes to use r0+rN addressing mode
	for some address reloads.

	* final.c (final_start_function): If SDB_DEBUG, call
	sdbout_begin_function.  If XCOFF_DEBUG, call xcoffout_begin_function
	instead of xcoffout_output_first_source_line.
	(final_scan_insn): Don't call sdbout_begin_function or
	xcoffout_begin_function.
	* xcoffout.c (xcoffout_output_first_source_line): Delete.
	(xcoffout_begin_function): Call dbxout_parms and
	ASM_OUTPUT_SOURCE_LINE.

	* va-mips.h: Change every occurance of #if __mips>=3 to
	#ifdef __mips64.
	* mips/abi64.h (CPP_SPEC): Output -D__mips64 when -mips3, or -mips4,
	or -mgp64.  Output -U__mips64 when -mgp32.
	* mips/dec-bsd.h, mips/elf64.h, mips/iris3.h: Likewise.
	* mips/iris5.h, mips/mips.h, mips/netbsd.h, mips/osfrose.h: Likewise.

	* i960.c (i960_function_epilogue): Don't clear g14 for functions with
	an argument block.
	(i960_output_reg_insn): Likewise.
	(i960_output_call_insn): Clear g14 for functions wtih an argument
	block.

Fri Jul 28 08:43:52 1995  Doug Evans  <[e-mail]>

	* i960.c (i960_arg_size_and_align): Correct alignment of XFmode
	values in library calls.
	* i960.md (movdi matchers): Support odd numbered regs.

Fri Jul 28 08:37:25 1995  Michael Gschwind  <[e-mail]>

	* pdp11.md (divhi3, modhi3, divmodhi4): Rewrite.
	
Wed Jul 26 10:15:52 1995  Hallvard B Furuseth  ([e-mail])

	* collect2.c (end_file): Fix typo in error message text.

Wed Jul 26 09:22:22 1995  Jeff Law  ([e-mail])

	* xm-pa.h (USE_C_ALLOCA): Always define.
	* xm-pahpux.h (USE_C_ALLOCA): Likewise.

	* x-pa (CC): Remove useless definition.