gcc/

	* read-rtl.c (mapping): Remove index field.  Add current_value field.
	Define heap vectors.
	(iterator_group): Fix long line.  Remove num_builtins field and
	uses_iterator fields.  Make apply_iterator take a void * parameter.
	(iterator_use, atttribute_use): New structures.
	(iterator_traverse_data, BELLWETHER_CODE, bellwether_codes): Delete.
	(current_iterators, iterator_uses, attribute_uses): New variables.
	(uses_mode_iterator_p, uses_code_iterator_p): Delete.
	(apply_mode_iterator, apply_code_iterator): Take a void * parameter.
	(map_attr_string, apply_iterator_to_string): Remove iterator
	and value parameters.  Look through all current iterator values
	for a matching attribute.
	(mode_attr_index, apply_mode_maps): Delete.
	(apply_iterator_to_rtx): Replace with...
	(copy_rtx_for_iterators): ...this new function.
	(uses_iterator_p, apply_iterator_traverse): Delete.
	(apply_attribute_uses, add_current_iterators, apply_iterators): New
	functions.
	(add_mapping): Remove index field.  Set current_value field.
	(initialize_iterators): Don't set num_builtins and uses_iterator_p
	fields.
	(find_iterator): Delete.
	(record_iterator_use, record_attribute_use): New functions.
	(record_potential_iterator_use): New function.
	(check_code_iterator): Remove handling of bellwether codes.
	(read_rtx): Remove mode maps.  Truncate iterator and attribute uses.
	(read_rtx_code, read_nested_rtx, read_rtx_variadic): Remove mode_maps
	parameter.  Use the first code iterator value instead of the
	bellwether_codes array.  Use record_potential_iterator_use
	for modes.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@188525 138bc75d-0d04-0410-961f-82ee72b054a4

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