[Bug tree-optimization/67153] [6/7/8/9 Regression] integer optimizations 53% slower than std::bitset<>

[ncm at cantrip dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67153

--- Comment #26 from ncm at cantrip dot org ---
Still fails on Skylake (i7-6700HQ) and gcc 8.1.0.

The good news is that clang++-7.0.0 code is slow on all four versions.