[PATCH] D63624: [PowerPC] Exploit single instruction load-and-splat for word and doubleword

[Nemanja Ivanovic via Phabricator via llvm-commits]

nemanjai created this revision.
nemanjai added reviewers: hfinkel, jsji, rzurob, saghir.
Herald added a subscriber: kbarton.
Herald added a project: LLVM.
nemanjai marked an inline comment as done.
nemanjai added inline comments.


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Comment at: test/CodeGen/PowerPC/power9-moves-and-splats.ll:15
 ; CHECK-NEXT:    blr
-
+;
 ; CHECK-BE-LABEL: test1:
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Please forgive the trivial changes in this test case. The script that produces the checks apparently behaves slightly differently now and I would prefer to leave the test case exactly as produced by the script.


We currently produce a load, followed by (possibly a move for integers and) a splat as separate instructions. VSX has always had a splatting load for doublewords, but as of Power9, we have it for words as well. This patch just exploits these instructions.


Repository:
  rL LLVM

https://reviews.llvm.org/D63624

Files:
  lib/Target/PowerPC/PPCISelLowering.cpp
  lib/Target/PowerPC/PPCISelLowering.h
  lib/Target/PowerPC/PPCInstrVSX.td
  test/CodeGen/PowerPC/VSX-XForm-Scalars.ll
  test/CodeGen/PowerPC/build-vector-tests.ll
  test/CodeGen/PowerPC/load-and-splat.ll
  test/CodeGen/PowerPC/power9-moves-and-splats.ll
  test/CodeGen/PowerPC/qpx-load-splat.ll
  test/CodeGen/PowerPC/swaps-le-7.ll

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