[Bug tree-optimization/121320] UBSAN error in tree-ssa-sccvn (signed integer overflow: 2305843009213693952 * 8 cannot be represented in type 'long int')

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121320

--- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-15 branch has been updated by Richard Biener
<rgue...@gcc.gnu.org>:

https://gcc.gnu.org/g:3ef3de7a7329d5c76bed31e8b49a2a661c45f72f

commit r15-10185-g3ef3de7a7329d5c76bed31e8b49a2a661c45f72f
Author: Richard Biener <rguent...@suse.de>
Date:   Thu Jul 31 13:06:36 2025 +0200

    tree-optimization/121320 - UBSAN error in ao_ref_init_from_vn_reference

    The multiplication by BITS_PER_UNIT should be done in poly_offset_int.

            PR tree-optimization/121320
            * tree-ssa-sccvn.cc (ao_ref_init_from_vn_reference): Convert
            op->off to poly_offset_int before multiplying by
            BITS_PER_UNIT.

    (cherry picked from commit ff6f7d8e005ae94ffd55f1dba727e28531c3daf3)