RFA: Add support for Renesas RX architecture to GCC (take 3)

[Nick Clifton]

Hi Guys,

  Here is the third revision of my patch to add support for the
  Renesas RX architecture to GCC.  I believe that I have address all
  of the issues raised by Richard Henderson and Joseph S. Myers.

  OK to apply ?

Cheers
  Nick

./ChangeLog
2009-10-08  Nick Clifton  <nickc@redhat.com>

	* MAINTAINERS: Add myself as a maintainer for the RX port.

gcc/ChangeLog
2009-10-08  Nick Clifton  <nickc@redhat.com>

	* config.gcc: Add support for RX target.
	* config/rx: New directory.
	* config/rx/constraints.md: New file.
	* config/rx/predicates.md: New file.
	* config/rx/rx.c: New file.
	* config/rx/rx.h: New file.
	* config/rx/rx.md: New file.
	* config/rx/rx.opt: New file.
	* config/rx/rx-protos.h: New file.
	* config/rx/t-rx: New file.
	* doc/extend.texi: Document RX function attributes.
	* doc/invoke.texi: Document RX specific command line options.
	* doc/contrib.texi: Document RX contribution.
	* doc/md.texi: Document RX constraints.
	* doc/install.texi: Document RX support.

libgcc/ChangeLog
2009-10-08  Nick Clifton  <nickc@redhat.com>

	* config.host: Add support for RX target.
	* config/rx: New directory.
	* config/rx/rx-abi-functions.c: New file. Supplementary
	functions for libgcc to support the RX ABI.
	* config/rx/rx-abi.h: New file.  Supplementary header file for
	libgcc RX ABI functions.
	* config/rx/t-rx: New file: Makefile fragment for building
	libgcc for the RX.

gcc/testsuite/ChangeLog
2009-10-08  Nick Clifton  <nickc@redhat.com>

	* lib/target-supports.exp (check_profiling_available):
	Profiling is not, currently, available for the RX port.
	(check_effective_target_hard_float): Add support for RX
	target.
	* gcc.target/rx: New directory.
	* gcc.target/rx/builtins.c: New test file.
	* gcc.target/rx/interrupts.c: New test file.
	* gcc.target/rx/rx-abi-function-tests.c: New test file.
	* gcc.target/rx/zero-width-bitfield.c: New test file.
	* gcc.target/rx/i272091.c: New test file.
	* gcc.target/rx/packed-struct.c: New test file.
	* gcc.target/rx/rx.exp: New file: Drives RX tests.
	
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