[PATCH] D26861: [POWERPC][LE] prevent vxs load and store from expanding to lxvd2x/xxswapd and xxswapd/stxvd2x for aligned vectors

[Lei Huang via llvm-commits]

lei created this revision.
lei added reviewers: kbarton, syzaara, sfertile, jtony, nemanjai, amehsan, wschmidt.
lei added subscribers: llvm-commits, echristo.

On power7/8 LE, prevent vxs load and store from expanding to lxvd2x/xxswapd and xxswapd/stxvd2x when vector is aligned with elements up to 4 bytes.

PR# 30730


https://reviews.llvm.org/D26861

Files:
  lib/Target/PowerPC/PPCISelLowering.cpp
  lib/Target/PowerPC/PPCInstrVSX.td
  test/CodeGen/PowerPC/ppc64-i128-abi.ll
  test/CodeGen/PowerPC/swaps-le-1.ll
  test/CodeGen/PowerPC/swaps-le-2.ll
  test/CodeGen/PowerPC/vsx-ldst.ll
  test/CodeGen/PowerPC/vsx.ll

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