Split out RTL reader

[Joseph S. Myers]

On Tue, 26 Jun 2001, Zack Weinberg wrote:

> 	* rtl.c: Split RTL reader (read_rtx, read_skip_spaces,
> 	traverse_md_constants, fatal_with_file_and_line,
> 	fatal_expected_char, read_name, read_string, def_hash,
> 	def_name_eq_p, read_constants, and related data) to its own
> 	file.  Weed out now-unnecessary #includes.
> 	* read-rtl.c: New file.
> 	* Makefile.in (HOST_RTL): Add read-rtl.o.
> 	(read-rtl.o): New rule.
> 	(rtl.o, $(HOST_PREFIX_1)rtl.o): Update dependencies.

The documentation of passes and files of the compiler in gcc.texi should
be updated.

-- 
Joseph S. Myers
jsm28@cam.ac.uk