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[AArch64] Add UABDL patterns for log2 shuffle.

Description

[AArch64] Add UABDL patterns for log2 shuffle.

Summary:
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)

Reviewers: t.p.northover, jmolloy

Subscribers: aemerson, llvm-commits, rengolin

Differential Revision: http://reviews.llvm.org/D14208

Details

Committed
chatur01Nov 9 2015, 5:10 AM
Differential Revision
D14208: [AArch64] Add UABDL patterns for log2 shuffle.
Parents
rL252464: [AArch64] Handle extract_subvector(..., 0) in ISel.
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