[Bug rtl-optimization/115876] ext-dce.cc has ubsan issues; shifting negative values

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115876

--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jeff Law <l...@gcc.gnu.org>:

https://gcc.gnu.org/g:a6f551d079de1d151b272bcdd3d42316857c9d4e

commit r15-2011-ga6f551d079de1d151b272bcdd3d42316857c9d4e
Author: Jeff Law <j...@ventanamicro.com>
Date:   Fri Jul 12 13:11:33 2024 -0600

    [PR rtl-optimization/115876] Fix one of two ubsan reported issues in new
ext-dce.cc code

    David Binderman did a bootstrap build with ubsan enabled which triggered a
few
    errors in the new ext-dce.cc code.  This fixes the trivial case of shifting
    negative values.

    Bootstrapped and regression tested on x86.

    Pushing to the trunk.

    gcc/
            PR rtl-optimization/115876
            * ext-dce.cc (carry_backpropagate): Make mask and mmask unsigned.