[Bug tree-optimization/67153] [5/6 Regression] integer optimizations 53% slower than std::bitset<>

[ncm at cantrip dot org]

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

--- Comment #10 from ncm at cantrip dot org ---
I found this, which at first blush seems like it might be relevant.
The hardware complained about here is the same Haswell i7-4770.

http://stackoverflow.com/questions/25078285/replacing-a-32-bit-loop-count-variable-with-64-bit-introduces-crazy-performance