[PATCH] D39860: [PowerPC] Simplify a Swap if it feeds a Splat

[Stefan Pintilie via Phabricator via llvm-commits]

stefanp created this revision.

Modify the peephole optimization for PowerPC so that it doesn't just simplify a shift feeding a splat but also a swap feeding a splat.

Also fixed a small bug in the original shift feeds splat code.


https://reviews.llvm.org/D39860

Files:
  lib/Target/PowerPC/PPCMIPeephole.cpp
  test/CodeGen/PowerPC/p8-scalar_vector_conversions.ll
  test/CodeGen/PowerPC/ppc-xxsldwi-peephole.ll
  test/CodeGen/PowerPC/ppc64-peephole-swap.ll
  test/CodeGen/PowerPC/vsx.ll

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