[Bug c/100393] Very slow compilation of switch statement with thousands of cases

[curiousdannii at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100393

--- Comment #1 from Dannii Willis <curiousdannii at gmail dot com> ---
Okay, I've confirmed the regression myself, using functions_unsafe.i:

gcc-8: real     0m11.450s
gcc-10: real    4m46.472s

And for comparison
clang: real     0m0.711s