Fix building gfortran for ARM.

 http://gcc.gnu.org/ml/gcc-patches/2007-05/msg01010.html

 ----

 The patch below fixes a crash building libgfortran on arm-linux-gnueabi.

 This target doesn't really have a 128-bit integer type, however it does use 

 TImode to represent the return value of certain special ABI defined library 

 functions. This results in type_for_size(TImode) being called.

 Because TImode deosn't correspond to any gfortran integer kind 

 gfc_type_for_size returns NULL and we segfault shortly after.

 The patch below fixes this by making gfc_type_for_size handle TImode in the 

 same way as the C frontend.

 Tested on x86_64-linux and arm-linux-gnueabi.

 Applied to trunk.

 Paul

 2007-05-15  Paul Brook  <paul@codesourcery.com>

     gcc/fortran/

     * trans-types.c (gfc_type_for_size): Handle signed TImode.

 diff -durN gcc-4.2.3.old/gcc/fortran/trans-types.c gcc-4.2.3/gcc/fortran/trans-types.c

 --- gcc-4.2.3.old/gcc/fortran/trans-types.c	2007-08-31 10:27:50.000000000 +0200

 +++ gcc-4.2.3/gcc/fortran/trans-types.c	2008-07-17 09:54:20.000000000 +0200

 @@ -1799,6 +1799,13 @@

  	  if (type && bits == TYPE_PRECISION (type))

  	    return type;

  	}

 +

 +	/* Handle TImode as a special case because it is used by some backends

 +	   (eg. ARM) even though it is not available for normal use.  */

 +#if HOST_BITS_PER_WIDE_INT >= 64

 +	if (bits == TYPE_PRECISION (intTI_type_node))

 +	  return intTI_type_node;

 +#endif

      }

    else

      {