[Bug c++/53752] [4.8 Regression] ice in write_array_type

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53752

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-06-25 
08:44:35 UTC ---
Created attachment 27698
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27698
autoreduced testcase

We mangle an array with TYPE_DOMAIN [0, UINT_MAX], so it has UINT_MAX + 1
number
of elements.  The old code read

          /* The ABI specifies that we should mangle the number of
             elements in the array, not the largest allowed index.  */
          max = size_binop (PLUS_EXPR, max, size_one_node);
          write_unsigned_number (tree_low_cst (max, 1));

which of course simply truncated the result to zero, and only the verifying
that it fits into an unsigned host-wide-int.