[Bug tree-optimization/99918] [9/10/11 Regression] suboptimal code for bool bitfield tests

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99918

--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
This only seems to affect C _Bool bit-fields and not C++ bool.