[Bug tree-optimization/120080] [16 regression] ICE when building llvm-20.1.3 (find_bit_tests, at tree-switch-conversion.cc:1799) since r16-347-g1381a5114788a2

[mcccs at gmx dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120080

--- Comment #9 from mcccs at gmx dot com ---
Created attachment 61324
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61324&action=edit
improved reduction.c

Andrew's reduction modified for reproducing on latest trunk, fortunately not
much had to be changed