RFA: MeP: Fix ICE building newlib

[Nick Clifton]

Hi DJ,

  The patch below fixes an ICE building newlib for an mep-elf toolchain.
  I had been baffled as to the cause, as it appeared that a internal
  tree pointer was being corrupted, so in desperation I tried fixing all
  of the compile time warning messages building mep.c.  Lo and behold -
  after adding a #include "gimple.h" in order to get the prototype for
  create_tmp_var() the build started working! 

  So - the patch below fixes all of the compile time warnings for mep.c,
  except those about the %E printf format type not being recognised.  I
  am not sure if those can actually be fixed without upgrading my host
  gcc to a newer version.

  Tested by building a mep-elf toolchain.

  OK to apply ?

Cheers
  Nick

gcc/ChangeLog
2010-02-21  Nick Clifton  <nickc@redhat.com>

	* config/mep/mep.c: Include gimple.h.
        (mep_function_uses_sp): Delete unused function.
        (mep_gimplify_va_arg_expr): Change types of pre_p and post_p
        parameters.  Use unsigned integers to count args.  Return a
        NULL_RTX rather than an error_mark_node.  Tidy up formatting.

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