[Bug middle-end/86575] [7/8 Regression] -Wimplicit-fallthrough affects code generation

[matz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86575

--- Comment #7 from Michael Matz <matz at gcc dot gnu.org> ---
As I stated, it's only fixed in trunk, so it's still a regression in 7 and 8,
as marked in the summary.