From-SVN: r21006

        * rtlanal.c (reg_overlap_mentioned_p): Handle STRICT_LOW_PART.  If
        either argument is CONSTANT_P, then return zero.
        * reload.c (reg_overlap_mentioned_for_reload_p): Similarly.

From-SVN: r21005

        * configure.in: Also look at $srcdir/gas/configure to find a
        gas version #.

From-SVN: r21004

From-SVN: r21003

From-SVN: r21002

 
	* i386/cygwin32.h (ASM_DECLARE_FUNCTION_NAME): Merge duplicate
	definitions from last two patches.

From-SVN: r21001

 
	* i386/cygwin32.h (ASM_DECLARE_FUNCTION_NAME): Merge duplicate
	definitions from last two patches.

From-SVN: r21000

reload1.c (choose_reload_regs): Don't set reload_override_in if EQUIV is clobbered in INSN and the reload is...

	* reload1.c (choose_reload_regs): Don't set reload_override_in
	if EQUIV is clobbered in INSN and the reload is done after INSN.

From-SVN: r20999

From-SVN: r20998

	* expr.c (emit_queue): If emitting a SEQUENCE, set QUEUED_INSN
	to the first insn of the sequence.

From-SVN: r20997

From-SVN: r20996

From-SVN: r20995

	* decl.c (xref_tag): Handle attributes between 'class' and name.
	* parse.y (aggr): Likewise.
	* semantics.c (finish_class_definition): Likewise.
	* Makefile.in (EXPECTED): Adjust.
	* cp-tree.h: Declare flag_optional_diags and warn_multichar.
	* decl2.c: Define them.
	(lang_decode_option): Handle them.
	* lang-options.h: Add -foptional-diags.
	* class.c (finish_struct): Don't complain about multiple meanings of
	name if -fno-optional-diags.
	* decl.c (pushdecl_class_level): Likewise.
	* lex.c (real_yylex): Check warn_multichar.

From-SVN: r20994

From-SVN: r20993

mn10200.md (various zero/sign extension patterns): zero and sign extensions which use "sub" clobber cc0.

        * mn10200.md (various zero/sign extension patterns): zero and sign
        extensions which use "sub" clobber cc0.

From-SVN: r20992

From-SVN: r20990

From-SVN: r20989

        * print-rtl.c (print_rtx): Only print fp values when REAL_VALUE_TYPE
        is a double.

From-SVN: r20988

From-SVN: r20987

From-SVN: r20986

reload.c (find_equiv_reg): When looking for stack pointer + const, make sure we don't use a stack adjust.

        * reload.c (find_equiv_reg): When looking for stack pointer + const,
        make sure we don't use a stack adjust.

From-SVN: r20985

	* reload.c (find_equiv_reg): If need_stable_sp is set,
	check if stack pointer is changed directly.

From-SVN: r20984

	* tree.h (DECL_NON_ADDR_CONST_P): New accessor macro.
	(struct tree_decl): Add non_addr_const_p field.
	* tree.c (staticp): Use.
	* i386/cygwin32.h (CPP_PREDEFINES): Map __declspec(x) to GCC
	attributes.
	(SUBTARGET_SWITCHES): Switches to turn on/off dllimport|export
	attributes. Also accept -mwindows option.
	(VALID_MACHINE_DECL_ATTRIBUTE): New macro.
	(MERGE_MACHINE_DECL_ATTRIBUTE): New macro.
	(REDO_SECTION_INFO_P): New macro.
	(DRECTVE_SECTION_FUNCTION): New macro.
	(drectve_section): Cover function to implement above.
	(SWITCH_TO_SECTION_FUNCTION): New macro.
	(switch_to_section): Covert function to implement above.
	(EXTRA_SECTIONS): Add in_drectve.
	(EXTRA_SECTION_FUNCTIONS): Add in_drectve and switch_to_section.
	(ENCODE_SECTION_INFO): Delete old macro and redefine as a function.
	(STRIP_NAME_ENCODING): Handle new attributes.
	(ASM_OUTPUT_LABELREF): New macro.
	(ASM_OUTPUT_FUNCTION_NAME): New macro.
	(ASM_OUTPUT_COMMON): New macro.
	(ASM_OUTPUT_DECLARE_OBJECT_NAME): New macro.
	* i386/mingw32.h (CPP_PREDEFINES): Map __declspec(x) to GCC
	attributes.
	* i386/winnt.c (i386_pe_valid_decl_attribute_p): New function.
	(i386_pe_merge_decl_attributes): New function.
	(i386_pe_check_vtable_importexport): New function.
	(i386_pe_dllexport_p): New function.
	(i386_pe_dllimport_p): New function.
	(i386_pe_dllexport_name_p): New function.
	(i386_pe_dllimport_name_p): New function.
	(i386_pe_mark_dllexport): New function.
	(i386_pe_mark_dllimport): New function.
	(i386_pe_encode_section_info): New function.
	(i386_pe_unique_section): Strip encoding from name first.

From-SVN: r20983

        * libgcc2.c (L_exit): Provide a fake for atexit on systems which
        define ON_EXIT but not HAVE_ATEXIT.

From-SVN: r20982

From-SVN: r20981

From-SVN: r20980

        * i386.c (ix86_epilogue): For pentium processors, try to deallocate
        4 or 8 byte stacks with pop instructions instead of an add instruction.

From-SVN: r20979

From-SVN: r20978

X
	* i386/cygwin32.h: Add some declaration of external functions.
 	(ASM_DECLARE_FUNCTION_NAME): Define.
	(ASM_OUTPUT_EXTERNAL, ASM_OUTPUT_EXTERNAL_LIBCALL): Define.
	(ASM_FILE_END): Define.
	* i386/winnt.c (i386_pe_declare_function_type): New function.
	(struct extern_list, extern_head): Define.
	(i386_pe_record_external_function): New function.
	(i386_pe_asm_file_end): New function.

From-SVN: r20977

�
	* i386/cygwin32.h: Add some declaration of external functions.
 	(ASM_DECLARE_FUNCTION_NAME): Define.
	(ASM_OUTPUT_EXTERNAL, ASM_OUTPUT_EXTERNAL_LIBCALL): Define.
	(ASM_FILE_END): Define.
	* i386/winnt.c (i386_pe_declare_function_type): New function.
	(struct extern_list, extern_head): Define.
	(i386_pe_record_external_function): New function.
	(i386_pe_asm_file_end): New function.

Co-Authored-By: Jeffrey A Law <law@cygnus.com>

From-SVN: r20976

	* reload1.c (delete_dead_insn): Don't delete feeding insn
	if that insn has side effects.

From-SVN: r20975

        * flow.c (find_auto_inc): Clear UNCHANGING bit of register that is
        changed.

From-SVN: r20974

        * reload1.c (reload_reg_free_before_p): RELOAD_FOR_OPADDR_ADDR
        precedes RELOAD_FOR_OUTADDR_ADDRESS.

From-SVN: r20973

        * print-rtl.c (print_rtx): Display the real-value equivalent of
        a const_double when easy.
        * real.h (REAL_VALUE_TO_TARGET_SINGLE): Use a union to pun types.
        Zero memory first for predictability.
        (REAL_VALUE_TO_TARGET_DOUBLE): Likewise.
        * varasm.c (immed_real_const_1): Notice width of H_W_I == double.

From-SVN: r20972

        * c-parse.in (struct_head, union_head, enum_head): New nonterminals.
        (structsp): Use them.  Update files generated from c-parse.in.
        * extend.texi (Type Attributes): Document it.

From-SVN: r20971

From-SVN: r20970

From-SVN: r20969

        * c-decl.c: Add warn_multichar.
        (c_decode_option): Handle -Wno-multichar.
        * c-lex.c (yylex): Check it.
        * c-tree.h: Declare it.
        * toplev.c (lang_options): Add it.
        * invoke.texi: Document it.

From-SVN: r20968

        * gcse.c (hash_scan_insn): New argument IN_LIBCALL_BLOCK.  Changed
        caller.

From-SVN: r20967

combine.c (expand_compound_operation): Fix thinko in code to optimize (zero_extend:DI (subreg:SI (foo:DI) 0)) to foo:DI.

        * combine.c (expand_compound_operation): Fix thinko in code to optimize
        (zero_extend:DI (subreg:SI (foo:DI) 0)) to foo:DI.

From-SVN: r20966