Antonio Sanchez 3dc42eeaec Enable equality comparisons on GPU. ...

Since `std::equal_to::operator()` is not a device function, it
fails on GPU.  On my device, I seem to get a silent crash in the
kernel (no reported error, but the kernel does not complete).

Replacing this with a portable version enables comparisons on device.

Addresses #2292 - would need to be cherry-picked.  The 3.3 branch
also requires adding `EIGEN_DEVICE_FUNC` in `BooleanRedux.h` to get
fully working.


(cherry picked from commit 7880f10526)

2021-08-03 16:15:44 +00:00

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