[llvm] r178409 - Implement XOR reassociation. It is based on following rules:

[Sean Silva]

That's a good way of looking at it. I usually try to think about it like
this but I hadn't been able to divine the OR conversion:

On Sat, Mar 30, 2013 at 10:56 AM, Stephen Canon <scanon at apple.com> wrote:

>
> (a OR b) ==> a + ab + b
>

That's clever.

-- Sean Silva
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