Failure of gcc.c-torture/execute/991014-1.c on irix6.5 with -mabi=64

[Billinghurst, David (CRTS)]

Compilation of gcc.c-torture/execute/991014-1.c fails on irix6.5 with
-mabi=64.   I think this test should be an XFAIL for any 32 bit -> 64 bit
cross compile.

This test case can be reduced to

typedef typeof(sizeof(char)) Size_t;
#define bufsize ((1L << (8 * sizeof(Size_t) - 2))-256)
struct huge_struct
{
  short buf[bufsize];
};

which fails with "size of array `buf' is too large"

This seems reasonable as bufsize is:
  * 1073741568 for default -n32 ABI
  * 4611686018427387648 for -64 ABI
and we are doing a 32 bit -> 64 bit cross compile

Thoughts?