changelog.7

GUN开源阻止下的编译器GCC

	(PRINT_OPERAND, _ADDRESS): Call convex.c.
	(EXIT_BODY): Define for libgcc2.  Call atexit handler if present.
	
	convex.md: Add scheduling info.
	(movxx): One of the operands must be a register.
	(movdf, movdi):	Add anonymous patterns that can load an arbitrary 
	const_double by doing two immediate loads.  This is not superior
	to loading it from memory, and can be worse, so LEGITIMATE_CONSTANT_P
	still rejects these constants, but the patterns are still useful
	so rtx folding can produce arbitrary results.
	(floatunsdidf, floatunsdisf): Add patterns that avoid double rounding.
	(floatunssidf, floatunssisf): Add patterns that mimic gcc's default
	method, to keep SI cvts from promoting to the above DI cvts.
	(fix_truncdfsi2): Use cvtd.l even if cvtd.w is available -- on c34
	cvtd.w is microcoded and slower.
	(addqi3, subqi3, mulqi3): can do immediate with word insn.
	(subsi3): use sub/neg to get reverse subtract (reduces reg shuffling).
	(udivsi3): give up on having sign_expand_binop do this; people keep
	breaking it.  Manually extend unsigned SI to signed DI, then divide.
	(xshfxx3): The options rank differently on different machines, so 
	spell them all out and enable the appropriate ones under TARGET_Cxx.
	(sqrtxx2): Put under flag_fast_math.
	(sinxx2, cosxx2): I don't know why these exist, but they do, so supply
	them.  The other microcoded intrinsics are in convex math.h.
	(txtxx): Remove, no longer necessary.
	(cmpdi): Add alternative to fake "eq.l #0,sk" with "neg.l sk,scratch".
	(cmpqi): Omit, seems to produce marginally better cse than the old way.
	(cmpsf): Avoid compare against 0.0 in ieee mode, since -0.0 is 
	possible and would confuse old ucode.
	(movstrsi): Add.
	(anon): Add patterns to pick up on dbra optimizations and implement the
	sub/test part.  (This optimizes out the compare against 0.)
	(call, call_value): Use _pop form instead, and let convex.c replace
	the pushes with fp stores.
	(end): Put local variable list back.

	convex.c (init_convex): New. Fill in tables used by convex.h.
	(psw_disable_float): New.  Turn off float exception enables to
	make the environment more ieee-like.
	(set_cmp): Change name to output_cmp.
	(gen_cmp): Change name to output_condjmp.  Add handling for
	`neg.x' as a fake `eq.x #0' and for optimized-out compares
	that read the carry of a preceding decrement.
	(simplify_for_convex): New.  Replace addr-(-const) with
	addr+const so /bin/as will like the notation.
	(expand_movstr): New.  Generate pipelined load/store sequence.
	(asm_declare_function_name): New. Output arg count for debuggers.
	(print_operand): Moved from convex.h.  Add %u and %v to fetch
	subwords of a CONST_DOUBLE, %z to use in replacing shift by mul.
	(print_operand_address): Moved from convex.h.
	(outfloat): New, call REAL_VALUE_TO_DECIMAL.
	(replace_arg_pushes): New.  Replace sp by fp if possible; this does
	not allow us to get rid of sp but stores are faster than pushes on
	new machines.
	(emit_ap_optimizations): New.  Do simple live analysis of arg pointer
	register and eliminate dead reloads.
	
	math-convex.h: removed.
	fixinc.convex: new file.

Thu May  6 22:54:43 1993  Torbjorn Granlund  ([e-mail])

	* config/we32k/we32k.h (ASM_OUTPUT_ASCII): 
	Cast PTR to unsigned char *.
	* config/clipper/clix.h (ASM_OUTPUT_ASCII): Likewise.

Thu May  6 20:20:41 1993  Brendan Kehoe  ([e-mail])

	* cp-decl.c (build_enumerator): Strip any no-op casts off the
	value before we try to do anything with it.

	* cp-call.c (convert_harshness): Take volatility, in addition to
	constness, into account when figuring out the penalty for the
	type under question.

	* cp-decl.c (grokdeclarator): Undo unneeded change of Apr 6 when we
	returned the type of the local typedef, instead of the typedef itself.

Thu May  6 19:21:34 1993  Doug Evans  ([e-mail])

	* reload1.c (eliminate_regs, case {PRE,POST}_{INC,DEC}): Account
	for PUSH_ROUNDING.

Thu May  6 18:17:19 1993  Richard Stallman  ([e-mail])

	* config/i386/sequent.h (DBX_OUTPUT_LBRAC, DBX_OUTPUT_RBRAC):
	Override the usual definitions.

	* objc/hash.h, objc/objc.h, objc/runtime.h, objc/sarray.h:
	Use gstddef.h, with doublequotes.

Thu May  6 15:58:18 1993  Ian Lance Taylor  ([e-mail])

	* fixincludes: More fixes for IRIX 4.0.1.  Rather than replacing
	[^A-Z]CTRL, replace [^A-Z_]CTRL and [^A-Z]_CTRL.  Also patch
	"//" in elf_abi.h which the sed script breaks.

Thu May  6 13:58:39 1993  Jim Wilson  ([e-mail])

	* clix.h: Include "clipper/clipper.h" instead of "clipper.h".
	* config.sub (os): Add -clix*.
	* configure (clipper-intergraph-clix): Add clipper/ filename prefixes.

	* c-typeck.c (pointer_diff): Error if op1 is pointer to incomplete
	type.

	* fixinc.svr4 (sys/varargs.h): Replace.

Thu May  6 11:58:28 1993  Richard Stallman  ([e-mail])

	* reload1.c (forget_old_reloads_1): Accept and ignore 2nd arg.
	(reload_as_needed): Pass that second arg.

	* c-parse.in: For Objc, expect just 20 conflicts.

	* objc-act.c (OBJC_GEN_METHOD_LABEL): Do use CAT_NAME.

	* config/i386/i386.md (extendsidi2): Use cdq or cltd, not cwtl.

        * configure (i[34]86-*-bsd): Don't use collect2.

	* c-typeck.c (convert_for_assignment): Don't use convert_and_check
	when handling arithmetic types here.

	* c-common.c (truthvalue_conversion): Turn off Apr 29 change.

Thu May  6 05:44:23 1993  Richard Kenner  ([e-mail])

	* reload.c (find_equiv_reg): Don't look inside a CONST_DOUBLE;
	use operand_subword instead.

	* varasm.c (record_constant): Properly make the header of
	a struct constant_descriptor.

	* function.c (walk_fixup_memory_subreg): Add new arg UNCRITICAL.
	(fixup_var_refs_insn): Call with UNCRITICAL of 1 when processing
	REG_NOTES.

	* integrate.c (expand_inline_function): Don't call convert_to_mode
	unless we need to; some converstions of VOIDmode objects can
	mess them up.

	* expmed.c (store_split_bit_field): Properly handle VALUE when
	it is a CONST_DOUBLE.

	* fold-const.c (decode_field_reference): Don't do anything for
	non-integral fields.

	* cse.c (simplify_binary_operation, simplify_relational_operation):
	Check for MODE_CC modes, not just CCmode.

Thu May  6 00:54:40 1993  Kresten Krab Thorup  ([e-mail])

        * objc/class.c, objc/hash.c: Change calloc to __objc_xcalloc.
        * objc/objects.c (class_create_instance): bzero new instances

	* objc/sendmsg.c (__objc_send_initialize, class_add_method_list):
	Allow multiple +initialize methods per class.

Wed May  5 21:40:04 1993  Richard Stallman  ([e-mail])

	* config/i386/sequent.h (LINK_LIBGCC_SPECIAL): #if 0.

	* toplev.c (main): Improve error message in previous change.

Wed May  5 19:36:15 1993  Jeffrey A. Law  ([e-mail])

	* combine.c (combinable_i3pat): Do not make REG_DEAD notes for
	the stack pointer, frame pointer, or arg pointer.

Wed May  5 17:57:30 1993  Richard Stallman  ([e-mail])

	* config/i386/sequent.h (LINK_LIBGCC_SPECIAL): Defined.

Wed May  5 00:01:57 PDT 1993  Ron Guilmette  (segfault![e-mail])

	* expr.h: Fix comment typos.  emit_block_move decl was hidden.

	* toplev.c (main): If C++ for Dwarf requested, warn and turn it off.

Wed May  5 21:48:24 1993  Kresten Krab Thorup  ([e-mail])

	* objc-act.c (check_methods_accessible): Handle interface types. 

Wed May  5 14:37:42 1993  Richard Kenner  ([e-mail])

	* fold-const.c: (optimize_bit_field_compare): Add missing arg
	to const_binop.

	* reg-stack.c (record_asm_reg_life): Don't abort for asm that
	doesn't match its constraints.

	* combine.c (num_sign_bit_copies, case SUBREG): Properly compute
	the number of sign bit copies of SUBREGs of promoted objects.

	* optabs.c (add_equal_note, expand_binop, expand_unop): Make
	copy of operands for REG_EQUAL note to avoid sharing RTL if
	called later than RTL generation.
	(emit_libcall_block, expand_fix): Likewise.
	* expr.c (convert_move): Likewise, though probably not
	called after RTL generation.

Wed May  5 14:11:12 1993  Ian Lance Taylor  ([e-mail])

	* fixincludes: Only quote argument to _IO[A-Z]*, not first item in
	parentheses.  Added patches for IRIX 4.0.1 header files to undo
	some inappropriate changes.

Wed May  5 11:34:59 1993  Richard Stallman  ([e-mail])

	* toplev.c (flag_defer_pop): Initialize to 0.
	(main): Set it to 1 if optimizing.

Wed May  5 06:38:47 1993  Tom Wood  ([e-mail])

	* configure (i[34]86-next-*, m68k-next-*): collect2 isn't needed.

Tue May  4 14:21:11 1993  Kresten Krab Thorup  ([e-mail])

        * objc/objc.h, objc/runtime.h: Remove inclusion of memory.h
        * objc/objc.h, objc/hash.h, objc/runtime.h: Remove inclusion of
        gstddef.h 

        * objc/Makefile (OBJC_H): Add typedstream.h 

        * objc/Object.h: Add includes objc/objc.h and objc/typedstreams.h 
        objc/Object.h: Removed `minimal' definitions.  Includes objc.h
        instead.  
        * objc/archive.c: Add include "typedstream.h"

        * objc/typedstream.h: New file.  Contents moved from
        objc/objc-api.h.

        * objc/objc.h (IvarList, Ivar, SymTab, Module, Method,
        Category, Super, objc_method_description, objc_protocol_list):
        Data definitions moved to objc/objc-api.h

        * objc/archive.c: Change malloc into __objc_xmalloc

        * objc/objc.h, objc/sendmsg.c: Remove any code for hash lookup
        * objc/cache.h: File removed

        * objc/objc-api.h (class_create_instance, object_copy,
        object_dispose): Definitions moved to objc/objects.c 

        * objc/objc.h: Remove declarations for library functions.
        * objc/Object.m (-conformsTo:): Bugfix: Also ask superclasses.

Tue May  4 23:46:37 1993  Brendan Kehoe  ([e-mail])

	* cp-decl.c (start_decl): Give an error, not a sorry, when they try
	to declare a template on a VAR_DECL or a TYPE_DECL.

	* cp-type2.c (process_init_constructor): If we have a VAR_DECL
	that's static in the class, don't try to use it when we're working
	on an initializer-list; it has no business being there.

	* cp-cvt.c (convert_pointer_to): Only call get_base_distance et al.
	on RECORD_TYPEs, not on UNION_TYPEs.

	* cp-decl.c (grokdeclarator): Don't try to divine the name of the
	incomplete type for a field decl.

Tue May  4 19:55:29 1993  Jim Wilson  ([e-mail])

	* combine.c (distribute_notes, REG_DEAD case): Handle hard
	registers which partially overlap the destination of the insn.

Tue May  4 17:59:10 1993  Jeffrey A. Law  ([e-mail])

	* pa.md (casesi0): Remove incorrect fix from April 23.
	* pa.h (CASE_DROPS_THROUGH): Define.

Tue May  4 13:22:21 1993  John Hassey  ([e-mail])

	* t-dgux: Fixed name of link script.

Tue May  4 11:15:40 1993  Steve Chamberlain  ([e-mail])

	* sh.md (arith patterns): Rework constraints.
	* sh.h (ASM_OUTPUT_CASE_LABEL): Ensure jump table is aligned.
	* sh.c (arith_reg_operand): New constraint. (dump_constants):
	Force out a constant table if necessary.

Mon May  3 20:41:00 1993  Richard Stallman  ([e-mail])

	* tree.c (build_array_type): The main variant of an array type
	should always be an array whose element type is the main variant.

Mon May  3 19:27:04 1993  Jim Wilson  ([e-mail])

	* lite.h (CPP_PREDEFINES): Delete -Dsun and -Dunix.

	* combine.c (make_extraction): Move BYTES_BIG_ENDIAN !=
	BITS_BIG_ENDIAN offset correction after the offset calculation.
	* elxsi.h, mips.h (BITS_BIG_ENDIAN): Define to zero.

	* c-decl.c (grokdeclarator, ARRAY_REF case): Build array type, and
	then build the variant array type.

	* sparc.md (floatsitf2): Output fitoq not fitox.

	* i960.md (scc pattterns): Add missing mode to conditional operators.
	* i960.c (output_function_profiler): Add missing newlines in strings.

	* c-common.c (truthvalue_conversion): Don't optimize subtract of
	reals when target uses IEEE arithmetic.

	* c-parse.in: Delete cond.awk reference.
	* cond.awk: Delete file.

Mon May  3 16:58:55 1993  Richard Stallman  ([e-mail])

	* c-typeck.c (digest_init): Check size properly for wide-string.

	* Makefile.in (TEXI2DVI): New variable.
	(cpp.dvi, gcc.dvi): Use it.

Mon May  3 16:29:38 1993  Brendan Kehoe  ([e-mail])

	* cp-search.c (lookup_nested_field): Pass complain down as the value
	for lookup_field's `protect' argument.  This will help avoid
	incorrect visibility errors when we're parsing things.

Mon May  3 21:02:22 1993  H.J. Lu  ([e-mail])

	* config/i386/linux.h (FUNCTION_PROFILER, ASM_OUTPUT_ADDR_DIFF_ELT):
	Remove PIC stuff.  We wait for the ELF support in gas and binutils.
	(LINK_SPEC): Defined for -v.

Mon May  3 06:41:56 1993  Richard Stallman  ([e-mail])

	* objc/Makefile (copy-headers): Put `-' on mkdir command.

Sun May  2 09:28:43 1993  Richard Stallman  ([e-mail])

	* cccp.c (macroexpand): Treat `foo ( )' as 0 args if foo wants 0 args.

Sun May  2 07:37:45 1993  Richard Kenner  ([e-mail])

	* reload1.c (eliminate_regs, case SUBREG): Leave the SUBREG when
	the inner object is a pseudo on machines that extend byte
	loads (to be consistent with reload.c).
	* reload.c (push_reload): Allow non-paradoxical SUBREGs of MEM
	on machines that extend byte loads.	

Sun May  2 08:57:33 1993  Michael Meissner  ([e-mail])

	* real.c (EDOM, ERANGE): Do not define since errno.h was
	previously included.

Sun May  2 08:28:15 1993  Richard Stallman  ([e-mail])

	* cse.c (re