changelog

gcc库的原代码,对编程有很大帮助.

	add loop around recursive call in case the instruction gets split.

Thu Oct 26 07:28:45 1995  J"orn Rennecke ([e-mail])

	* genrecog.c (write_tree_1): Avoid emitting '-2147483648'.

	* jump.c (duplicate_loop_exit_test): Return 0 if found
	a NOTE_INSN_LOOP_CONT.

Tue Oct 24 15:30:14 1995  Jeffrey A Law  <[e-mail]>

	* calls.c (expand_call): Make sure valreg is at least
	a full word.

Sun Oct 22 19:35:41 1995  Jim Wilson  <[e-mail]>

	* sh.h (INIT_SECTION_ASM_OP): Delete.
	(HAVE_ATEXIT): Define.

Sun Oct 22 07:46:04 1995  Richard Kenner  ([e-mail])

	* libgcc2.c (__fixuns[xds]fsi): #undef MIN and MAX before #include
	of limits.h.

	* pa.c (pa_adjust_cost): Use pa_cpu, not pa_cpu_attr.

Sun Oct 22 07:38:58 1995  J"orn Rennecke ([e-mail])

        * alpha.h (CONST_OK_FOR_LETTER_P): Use 'U' for unsigned constants.
        * alpha.c (alpha_emit_set_const): Likewise.
        * mips.c (gen_int_relational): Likewise.

Sun Oct 22 07:14:35 1995  Douglas Rupp  ([e-mail])

	* i386.c (i386_return_pops_args): Don't need a FUNDECL to
	check for type attributes in FUNTYPE.

Sat Oct 21 18:17:42 1995  Jim Wilson  <[e-mail]>

	* sh.md (define_delay): Don't accept any instruction for an annulled
	slot, only accept those for which in_delay_slot is yes.
	* sh.c (find_barrier): When hi_const returns true, increment count_si
	by two if found_si is true.
	Always use get_attr_length to compute length of instructions.
	If count_hi or count_si out of range at end, need two PREV_INSN calls
	not one.
	When create new label, set LABEL_NUSES to 1.
	(reg_unused_after): Ifdef out code for handling labels.
	(prepare_scc_operands): New local variable mode.  Set it from
	sh_compare_op0 or sh_compare_op1.  Use it instead of SImode in
	force_reg calls.
	
	* optabs.c (expand_float): Emit missing barrier after unconditional
	jump.

Sat Oct 21 14:16:46 1995  Torbjorn Granlund  <[e-mail]>

	* alpha.md (cmpdf): Make conditional on TARGET_FP.

Fri Oct 20 19:11:12 1995  J"orn Rennecke ([e-mail])

	* combine.c (distribute_notes): Delete instructions without
	side effect that set a subreg of an unused register.

	* m68k.h (PREFERRED_RELOAD_CLASS): Check for !G constants
	for DATA_OR_FP_REGS also.

Fri Oct 20 18:57:10 1995  Ian Lance Taylor  <[e-mail]>

	* genmultilib: Output negations of unused alternatives, even if
	one of the alternatives is selected.

Fri Oct 20 18:48:50 1995  Jeff Law  ([e-mail])

	* integrate.c (output_inline_function): Turn on flag_no_inline
	to avoid function integration once we begin writing deferred
	output functions.

Fri Oct 20 18:46:33 1995  Michael Meissner  <[e-mail]>

	* rs6000.c (float_conv_temp): Delete global variable.
	(stack_temps): New static array to hold stack temps.
	(offsettable_mem_operand): Delete function.
	(offsettable_addr_operand, rs6000_stack_temp): New functions.
	(output_epilog): Zero stack_temps.

	* rs6000.h (offsettable_addr_operand): Declare instead of
	offsettable_mem_operand.
	(PREDICATE_CODES): Use offsettable_addr_operand.
	(float_conv_temp): Delete variable.

	* rs6000.md (move_to_float insns): Change move_to_float so
	that it doesn't have a clobber of the memory address, and instead
	passes the stack temp's memory address as one of the unspec args.
	(fix_truncdfsi2): Use rs6000_stack_temp to allocate the temp.
	(multiply, shift insns): Fix all cases of multiply and shift insns so
	that the right mnemonics are used for -mcpu=common with both
	-m{old,new}-mnemonics.

Fri Oct 20 17:58:19 1995  Jim Wilson  <[e-mail]>

	* expr.c (safe_from_p, case RTL_EXPR): Return 0 if RTL_EXPR_SEQUENCE
	exists.  Delete code to return 0 if exp_rtl is zero.

	* function.c (init_function_start): Don't call init_insn_lengths here.
	* toplev.c (rest_of_compilation): Call it here.

Thu Oct 19 19:19:06 1995  Richard Kenner  ([e-mail])

	* c-common.c (check_format_info): Make test for null pointer
	more general.

Thu Oct 19 18:56:16 1995  Satoshi Adachi  ([e-mail])

	* fixincludes (stdlib.h): Be more general in edit to change
	declaration of {c,m,re}alloc.

Thu Oct 19 18:48:53 1995  Torbjorn Granlund  <[e-mail]>

	* libgcc2.c (__udiv_w_sdiv): If we don't have sdiv_qrnnd, define
	dummy variant of __udiv_w_sdiv.
	
Thu Oct 19 18:45:21 1995  Jim Wilson  <[e-mail]>

	* alpha.h (ASM_SPEC): If GNU as is the default, then pass -g to
	the assembler if -malpha-as.  If GNU as is not the default, then pass
	-g to the assembler is not -mgas.

	* combine.c (distribute_notes): When search for new place to put
	REG_DEAD note, call distribute_links if this new place is between
	i2 and i3, and i2 uses the register.

Thu Oct 19 18:41:36 1995  Michael Meissner  <[e-mail]>

	* rs6000.md (float{,uns}sidf2): Rewrite to break the conversion
	process into several general insns.
	(move_to_float): New insns to move 2 integer regs into a float register
	through memory, taking endianess into account.  Make sure that the
	floating temporary is a valid address.  Use one temporary for all
	floats converted.
	(fix_truncdfsi2): Take endianess into account.

	* rs6000.c ({low_32_bit,offsettable_mem}_operand): The function
	low_32_bit_operand is now unused, delete it.  New function
	offsettable_mem_operand to determine if a memory address is
	offsettable.
	* rs6000.h ({low_32_bit,offsettable_mem}_operand): Ditto.
	(PREDICATE_CODES): Ditto.

	* rs6000.{c,h} (float_conv_temp): New global.
	* rs6000.c (output_epilog): Zero out float_conv_temp.

	* Makefile.in (libgcc{1,2}.a): Allow LIB{1,2}FUNCS_EXTRA files to
	end in .S as well as .c and .asm.

Wed Oct 18 17:56:45 1995  Jose Alonso  ([e-mail])

	* c-typeck.c (parser_build_binary_op): Warn about x^y==z, etc.

Mon Oct  9 12:38:06 1995  Michael Meissner  <[e-mail]>

	* protoize.c (reverse_def_dec_list): Silence compiler warnings.

Mon Oct  9 12:35:54 1995  Andrew Cagney  <[e-mail]>

	* ginclude/va-ppc.h (va_arg): Deal with long longs that would be
	passed in the 7th register, and are passed in the stack instead.

Fri Oct  6 13:47:10 1995  Jim Wilson  <[e-mail]>

	* alpha.h (ASM_SPEC): Add -g.

Fri Oct  6 13:42:50 1995  Richard Kenner  <[e-mail]>

	* alpha.h (alpha_{arg,auto}_offset): Make extern.

Fri Oct  6 13:24:43 1995  Michael Meissner  <[e-mail]>

	* rs6000.h (RETURN_ADDRESS_OFFSET): Correct previous change.

Fri Oct  6 13:14:43 1995  Doug Evans  <[e-mail]>

	* rtlanal.c (reg_set_last): Fix call to reg_set_between_p.

Tue Oct  3 12:31:38 1995  Richard Kenner  ([e-mail])

	* stor-layout.c (layout_type, case ARRAY_TYPE): Strip MAX_EXPR
	from upper bound when computing length if it just protects against
	negative length.

	* expr.c (emit_move_insn_1): When doing multi-word move, show
	output is clobbered.

Tue Oct  3 12:26:07 1995  Jim Wilson  <[e-mail]>

	* cse.c (set_nonvarying_address_components, case AND): Add *pend to
	end.  Add constant to start instead of subtracting it.

Tue Oct  3 12:23:28 1995  Torbjorn Granlund  <[e-mail]>

	* combine.c (simplify_rtx): In code that attempts to simplify
 	conditional expressions, if the result is an NE around another
	comparison, return the original expression.

	* longlong.h (mips umul_ppmm): Use `l' and `h' constraints;
	remove mflo and mfhi instructions.

Tue Oct  3 12:21:29 1995  Michael Meissner  <[e-mail]>

	* ginclude/va-ppc.h (va_start, stdarg case): Call
	__builtin_next_arg, and ignore the result, so that the compiler
	can report the proper error, if the second argument is not the
	last argument.

Tue Oct  3 12:02:51 1995  Kohtala Marko  <[e-mail]>

	* function.c (assign_stack_temp): Adjust full_size field of
	temp_slot when splitting an unused slot.

Tue Oct  3 11:51:59 1995  Mike Stump  <[e-mail]>

	* expr.c (expand_builtin_return_addr): Break out functionality
	from expand_builtin.
	(expand_builtin): Call expand_builtin_return_addr.
	* rs6000.h (RETURN_ADDR_RTX): Remove call to copy_to_reg.
	Offset to return address is 4 when !TARGET_64BIT and v4_call_p,
	8 otherwise.
	* sparc.h (RETURN_ADDR_RTX): Remove call to copy_to_reg.
	* alpha.h (RETURN_ADDR_RTX): New definition.

Sun Oct  1 21:23:30 1995  Richard Kenner  ([e-mail])

	* tree.c (staticp, case INDIRECT_EXPR): Disable case.

	* expr.c (expand_expr, case COMPONENT_REF): If getting component
	of union of variable size, propagate TARGET.

Fri Sep 29 07:48:09 1995  Richard Kenner  ([e-mail])

	* expr.c (store_expr): When storing promoted value, don't return
	MEM if address contains target.

Thu Sep 28 14:30:03 1995  Paul Eggert  <[e-mail]>

	* cccp.c (rescan): Expand `#if foo && #bar' without a bogus
	complaint about preprocessor directives within macro args.
	Expand `foo' in `foo#bar' without requiring a space before `#'.

Thu Sep 28 14:24:26 1995  Philippe De Muyter ([e-mail])

	* m68k.md (anonymous DImode shift patterns setting cc0): Turned
	off due to reload problems.

Thu Sep 28 14:05:22 1995  Niklas Hallqvist  ([e-mail])

	* Makefile.in (USER_H): Move up so can override.
	(INSTALL_ASSERT_H): New definition.
	(install-headers): Use it.
	(stmp-int-hdrs): Handle USER_H being empty.
	* config/x-netbsd (INSTALL_ASSERT_H): Define as empty.

	* i386/netbsd.h (WCHAR_{TYPE,UNSIGNED,TYPE_SIZE}): Now int.
	* m68k/netbsd.h, ns32k/netbsd.h, sparc/netbsd.h: Likewise.
	* vax/netbsd.h: Likewise.
	(SIZE_TYPE): Use unsigned int.

	* m68k.c (output_scc_di): Swap operands when needed.
	* m68k.h (LEGITIMATE_PIC_OPERAND): Allow SYMBOL_REF_FLAG symref.
	* m68k.md: Make both assembler syntaxes do the same for PIC calls.

Tue Sep 26 16:51:44 1995  Michael Meissner  <[e-mail]>

	* mips.c (override_options): Don't allow anything but integers to
	go in the HI/LO registers.

Tue Sep 26 16:36:18 1995  John F. Carr  <[e-mail]>

	* c-common.c (check_format_info): Don't warn about format type
	mismatch if the argument is an ERROR_MARK.

Mon Sep 25 17:50:50 1995  Craig Burley  ([e-mail])

	* stor-layout.c (put_pending_sizes): New function.
	* tree.h (put_pending_sizes): Add declaration.
	* tree.c (save_expr): Return original for ERROR_MARK.

Fri Sep 22 19:20:01 1995  Jeff Law  ([e-mail])

	* expr.c (expand_builtin, case BUILT_IN_MEMCPY): Strip off
	all NOP exprs from the source and destination nodes, then
	set MEM_IN_STRUCT_P.

Fri Sep 22 18:50:31 1995  Michael Meissner  <[e-mail]>

	* rs6000/eabi.h (ASM_OUTPUT_INT): Test for whether the integer
	being output is also a constant so &sym - &sym2 is not fixed up.

Fri Sep 22 18:49:07 1995  Peter Flass  ([e-mail])

	* i370.md (cmpsi): Add missing constraints to operand 1.

Fri Sep 22 18:27:33 1995  Torbjorn Granlund  <[e-mail]>

	* i386.h (CONST_OK_FOR_LETTER_P): Make `N' match range 0..255
	for `outb' instruction.

	* pyr.h (PRINT_OPERAND): Handle code `R' for REG.
        * longlong.h (pyr umul_ppmm): Use it.

Fri Sep 22 18:24:38 1995  Richard Kenner  ([e-mail])

	* c-parse.in (enumlist): Propagate error_mark_node.

	* c-aux-info.c (gen_type): Handle ERROR_MARK.

	* alpha.md (movdi): Avoid memory sharing problem when in reload.

Wed Sep 20 14:27:09 1995  Peter Flass <[e-mail]>

        * mvs.h (FUNCTION_PROLOGUE): Maintain savearea forward chain
	per MVS standards.

Wed Sep 20 14:20:52 1995  Torbjorn Granlund  <[e-mail]>

        * pyr.md (cmphi recognizer): Make condition match constraints.
	(cmpqi recognizer): Likewise.

Wed Sep 20 12:42:59 1995  Richard Kenner  ([e-mail])

	* integrate.c (expand_inline_function): Do copy something setting
	the result register if it is setting it to itself and has a REG_NOTE.

	* integrate.c (set_decl_{origin_self,abstract_flags}): Treat
	a DECL_INITIAL of error_mark_node the same as one of NULL_TREE.

Tue Sep 19 19:30:18 1995  Dave Pitts  ([e-mail])

	* i370.md (cmphi, movhi, movstricthi, extendhisi2): Correct generation
	of short integer (Halfword)
	({add,sub,mul,and,ior,xor}hi3): Likewise.
	* i370/mvs.h (MACROPROLOGUE): New macro.
	(FUNCTION_{PRO,EPI}LOGUE): Added ability to use IBM supplied function
	prologue macros.
	(FUNCTION_PROLOGUE): Corrected function "in-line" prologue alignment
	problems.
	(ASM_DECLARE_FUNCTION_NAME): Changed alignment to FullWord.
	(ASM_OUTPUT_{SHORT,ASCII}): Reworked.

Tue Sep 19 19:22:15 1995  Douglas Rupp  ([e-mail])

	* winnt/win-nt.h: Renamed from winnt/win-nt.h.
	(LINK_SPEC): Add -noinhibit-exec.
	* {alpha,i386}/win-nt.h: Renamed from {alpha,i386}/winnt.h.
	Include winnt/win-nt.h, not winnt/winnt.h.