[PATCH] D45982: [TTI, AArch64] Add transpose shuffle kind

[Matthew Simpson via Phabricator via llvm-commits]

mssimpso created this revision.
mssimpso added reviewers: rengolin, samparker, evandro, hfinkel.
Herald added a reviewer: javed.absar.
Herald added a subscriber: kristof.beyls.

This patch adds a new shuffle kind useful for transposing a 2xn matrix. These transpose shuffle masks read corresponding even- or odd-numbered vector elements from two n-dimensional source vectors and write each result into consecutive elements of an n-dimensional destination vector. The transpose shuffle kind is meant to model the TRN1 and TRN2 AArch64 instructions. As such, this patch also considers transpose shuffles in the AArch64 implementation of getShuffleCost.


Repository:
  rL LLVM

https://reviews.llvm.org/D45982

Files:
  include/llvm/Analysis/TargetTransformInfo.h
  include/llvm/CodeGen/BasicTTIImpl.h
  lib/Analysis/TargetTransformInfo.cpp
  lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  lib/Target/AArch64/AArch64TargetTransformInfo.h
  test/Analysis/CostModel/AArch64/shuffle-transpose.ll

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