[PATCH] Teach DAGCombiner to fold inverted bit tests

Mon May 6 11:05:19 PDT 2013

since this reduces the occurrences of 'y', shouldn't it be in instcombine?

On 6 May 2013 01:25, David Majnemer <david.majnemer at gmail.com> wrote:
> This patch changes DAGCombiner to do the following:
>   (xor (and x, y), y) -> (and (not x), y)
>
> This is nice because we avoid emitting an immediate twice for tagets like
> X86.
>
> --
> David Majnemer
>
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