cobol: Increase the speed of COMP-3 to COMP-3 moves.

The prior method converted packed-decimal to binary, and then from
binary back to packed-decimal.  These changes speed that up by moving
the unconverted bytes of the packed-decimal representations.  The moves
are done directly when possible, and do a half-byte shift when
necessary.

The expansion of MOVE algorithms has led me to break out MOVE
functionality from gcc/cobol/genapi.cc to the new gcc/cobol/move.cc
file.

gcc/cobol/ChangeLog:

	* Make-lang.in: Incorporate new move.cc file.
	* genapi.cc (gg_attribute_bit_get): Removed.
	(treeplet_fill_source): Moved.
	(file_static_variable): Likewise.
	(move_helper): Likewise.
	(parser_initialize_programs): Use pointer without converting to
	size_t.
	(get_binary_value_from_float): Moved.
	(gg_attribute_bit_clear): Removed.
	(gg_attribute_bit_set): Removed.
	(digits_to_bytes): Moved.
	(get_bytes_needed): Moved.
	(data_decl_type_for): Moved.
	(parser_display_internal): Forward reference to move_helper.
	(get_literalN_value): Moved.
	(is_figconst_t): Moved.
	(parser_initialize_table): Moved.
	(is_figconst): Moved.
	(parser_move): Moved.
	(parser_move_multi): Moved.
	(parser_division): Use function_address as pointer in call to
	__gg__is_canceled.
	(conditional_abs): Moved.
	(get_reference_to_data): Moved.
	(mh_identical): Moved.
	(mh_source_is_literalN): Moved.
	(float_type_of): Moved.
	(mh_dest_is_float): Moved.
	(picky_memset): Moved.
	(picky_memcpy): Moved.
	(mh_numeric_display): Moved.
	(mh_little_endian): Moved.
	(mh_source_is_group): Moved.
	(mh_source_is_literalA): Moved.
	(have_common_parent): Moved.
	(mh_alpha_to_alpha): Moved.
	* genapi.h (move_helper): New declaration.
	* gengen.cc (gg_cast): Changes to someday detect aliasing
	conditions.
	(gg_show_type): Expand types.
	(gg_indirect_i): Take a size_t parameter.
	(gg_array_value): Use gg_cast() wrapper instead of fold_convert().
	(gg_memchr): Likewise.
	(gg_strcmp): Likewise.
	(gg_strncmp): Likewise.
	(gg_strlen): Likewise.
	(gg_strdup): Likewise.
	(gg_malloc): Likewise.
	(gg_realloc): Moved.
	* gengen.h (gg_indirect_i): New declaration.
	* genutil.cc (get_location): Starting to look for aliasing.
	(treeplet_fill_source): Moved.
	(data_decl_type_for): Moved.
	(attribute_bit_clear): Moved.
	(attribute_bit_get): Moved.
	(attribute_bit_set): Moved.
	* genutil.h (treeplet_fill_source): New declaration.
	(data_decl_type_for): Likewise.
	(attribute_bit_clear): Likewise.
	(attribute_bit_get): Likewise.
	(attribute_bit_set): Likewise.
	* move.cc: New file.

libgcobol/ChangeLog:

	* libgcobol.cc (__gg__to_be_canceled): Use pointer instead of size_t.
	(__gg__is_canceled): Likewise.

gcc/testsuite/ChangeLog:

	* cobol.dg/group2/COMP-3_to_COMP-3__IN-PHASE__MOVES.cob: New test.
	* cobol.dg/group2/COMP-3_to_COMP-3__IN-PHASE__MOVES.out: New test.
	* cobol.dg/group2/COMP-3_to_COMP-3__OUT-OF-PHASE__MOVES.cob: New test.
	* cobol.dg/group2/COMP-3_to_COMP-3__OUT-OF-PHASE__MOVES.out: New test.