[PATCH] D46031: [DAGCombiner] Masked merge: if 'B' is constant, de-canonicalize the pattern (invert the mask).

Fri May 4 12:54:57 PDT 2018

lebedev.ri added a comment.

In https://reviews.llvm.org/D46031#1088250, @spatel wrote:

> I want to look at that x86 timing difference in more detail, but let me ask first: can we split this patch up and look at the changes independently?
>  I think there are 3 parts:
>
> 1. Ignore 'not'.
> 2. Change x86 hasAndNot().
> 3. Improve matching for AndNot with constant.

Yes, i think i can split it into three, will post tomorrow.

Repository:
  rL LLVM

https://reviews.llvm.org/D46031