[Bug tree-optimization/87042] UBSAN: poly-int.h:1095:5: runtime error: signed integer overflow: 9223372036854775807 * 8 cannot be represented in type 'long int'

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87042

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-08-22
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm.  Those poly_offset params should have got poly_offset_int instead of
poly_uint64 (they were HOST_WIDE_INT though, not offset_int).

Well, we should fix it nevertheless, but fixing comes at a cost :/

The particular case might be fixed by simply guarding the fold_ctor_reference
call for too big offset.