[PATCH] D77448: [PowerPC] Canonicalize shuffles to match more single-instruction masks on LE

[Roland Froese via Phabricator via llvm-commits]

RolandF added inline comments.


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Comment at: llvm/test/CodeGen/PowerPC/build-vector-tests.ll:1723
+; P9LE-NEXT:    xscvdpsxws f0, f0
+; P9LE-NEXT:    xxspltw v2, vs0, 1
 ; P9LE-NEXT:    blr
----------------
Looks like the code got worse here?


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Comment at: llvm/test/CodeGen/PowerPC/build-vector-tests.ll:3243
+; P9LE-NEXT:    xscvdpuxws f0, f0
+; P9LE-NEXT:    xxspltw v2, vs0, 1
 ; P9LE-NEXT:    blr
----------------
This code is also worse.


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Comment at: llvm/test/CodeGen/PowerPC/build-vector-tests.ll:4918
+; P9LE-NEXT:    xscvdpsxds f0, f0
+; P9LE-NEXT:    xxspltd v2, vs0, 0
 ; P9LE-NEXT:    blr
----------------
Okay it looks like there are a number of similar cases where the code is slightly worse.  I will stop flagging them individually.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D77448/new/

https://reviews.llvm.org/D77448