* gcc-interface/ada-tree.h (TYPE_NULL_BOUNDS): New macro.
(SET_TYPE_NULL_BOUNDS): Likewise.
* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Array_Type>: Set again
TREE_THIS_NOTRAP on the INDIRECT_REF node built for the template.
* gcc-interface/trans.c (Identifier_to_gnu): Return initializers of fat
pointer types.
* gcc-interface/utils.c (create_var_decl_1): If the object is external,
check that the initializer is a valid constant expression for use in
initializing a static variable. Add missing guard.
(update_pointer_to): Adjust TYPE_NULL_BOUNDS if set.
(convert_to_fat_pointer): In the null fat pointer case, build a valid
pointer for the bounds.
* gcc-interface/utils2.c (compare_fat_pointers): New function.
(build_binary_op) <EQ_EXPR>: Call it to compare fat pointers.
From-SVN: r179180
