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


Subject: Segfault on arm-linux-gnueabi

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.

Index: gcc/fortran/trans-types.c
===================================================================
--- gcc/fortran/trans-types.c
+++ gcc/fortran/trans-types.c
@@ -1783,6 +1783,13 @@ gfc_type_for_size (unsigned bits, int un
 	  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
     {