[PATCH] D12334: [ARM] Do not use vtrn for vectorshuffle if the order is reversed

Wed Sep 9 14:03:02 PDT 2015

jketema updated this revision to Diff 34366.
jketema added a comment.

Hi Ahmed,

I've added a FIXME comment, as <-1, 4, 2, 6> is indeed still rejected.

The check for @ BB#0 seems necessary, otherwise the tests fail by matching vtrn in the .type line. If there's a better way to not match on this line, please let me know.

http://reviews.llvm.org/D12334

Files:
  lib/Target/ARM/ARMISelLowering.cpp
  test/CodeGen/ARM/vtrn.ll
  test/CodeGen/ARM/vuzp.ll
  test/CodeGen/ARM/vzip.ll

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