[Bug middle-end/122870] signed overflow in classify_argument on gnat.dg/frame_overflow2.adb

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122870

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|target                      |middle-end

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
```
static int
classify_argument (machine_mode mode, const_tree type,
                   enum x86_64_reg_class classes[MAX_CLASSES], int bit_offset,
                   int &zero_width_bitfields)
{
  HOST_WIDE_INT bytes
    = mode == BLKmode ? int_size_in_bytes (type) : (int) GET_MODE_SIZE (mode);
  int words = CEIL (bytes + (bit_offset % 64) / 8, UNITS_PER_WORD);

  HOST_WIDE_INT bytes
    = mode == BLKmode ? int_size_in_bytes (type) : (int) GET_MODE_SIZE (mode);
  int words = CEIL (bytes + (bit_offset % 64) / 8, UNITS_PER_WORD);
```

9223372036854775807 is HWI_MAX.

I think there are other bugs about a similar thing. Here we have a type that is
too large for being anything really.