[PATCH] D33690: [PowerPC] Match vec_revb builtins to P9 instructions.

[Tony Jiang via Phabricator via llvm-commits]

jtony created this revision.



  Power9 has instructions that will reverse the bytes within an element for all
  sizes (half-word, word, double-word and quad-word). These can be used for the
  vec_revb builtins in altivec.h. However, we implement these to match vector
  shuffle nodes as that will cover both the builtins and vector shuffles that
  occur in the SDAG through other means.


https://reviews.llvm.org/D33690

Files:
  lib/Target/PowerPC/PPCISelLowering.cpp
  lib/Target/PowerPC/PPCISelLowering.h
  lib/Target/PowerPC/PPCInstrInfo.td
  lib/Target/PowerPC/PPCInstrVSX.td
  test/CodeGen/PowerPC/vec_revb.ll

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