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

[schwab--- via Gcc-bugs]

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

--- Comment #5 from Andreas Schwab <sch...@linux-m68k.org> ---
Note that the return type of carry_backpropagate should be unsigned as well,
but that does not fix the crash.