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Make fold standalone. #72139

Merged
merged 3 commits into from
May 20, 2020
Merged

Make fold standalone. #72139

merged 3 commits into from
May 20, 2020

Commits on May 17, 2020

  1. Make fold standalone. 

    `fold` is currently implemented via `try_fold`, but implementing it
directly results in slightly less LLVM IR being generated, speeding up
compilation of some benchmarks.

(And likewise for `rfold`.)

The commit adds `fold` implementations to all the iterators that lack
one but do have a `try_fold` implementation. Most of these just call the
`try_fold` implementation directly.
    @nnethercote
    nnethercote committed May 17, 2020
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  2. Tweak partition, unzip, try_find. 

    Many default iterator methods use `try_fold` or `fold`, and these ones
can too.
    @nnethercote
    nnethercote committed May 17, 2020
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Commits on May 18, 2020

  1. Add some more rfold implementations.

    @nnethercote
    nnethercote committed May 18, 2020
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