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

     {