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[AArch64] Add UABDL patterns for log2 shuffle.

Authored by chatur01 on Oct 30 2015, 9:36 AM.



This matches the sum-of-absdiff patterns emitted by the vectoriser using log2 shuffles.

Relies on D14207 to be able to match the extract_subvector(..., 0)

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chatur01 retitled this revision from to [AArch64] Add UABDL patterns for log2 shuffle..
chatur01 updated this object.
chatur01 set the repository for this revision to rL LLVM.
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jmolloy accepted this revision.Oct 30 2015, 10:05 AM
jmolloy edited edge metadata.

Hi Charlie,

I must say, when I read the title I didn't expect them to be this neat and tidy. I expected a whole host of spaghetti in ISelLowering.

This looks good to me.


This revision is now accepted and ready to land.Oct 30 2015, 10:05 AM
chatur01 closed this revision.Nov 9 2015, 5:13 AM