[PATCH] D45563: [X86][AArch64][NFC] Add tests for masked merge unfolding

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri created this revision.
lebedev.ri added reviewers: spatel, craig.topper, RKSimon.
Herald added subscribers: kristof.beyls, javed.absar, rengolin.

This is PR37104 <https://bugs.llvm.org/show_bug.cgi?id=37104>.

PR6773 <https://bugs.llvm.org/show_bug.cgi?id=6773> will introduce an IR canonicalization that is likely bad for the end assembly.
Previously, `andl`+`andn`/`andps`+`andnps` / `bic`/`bsl` would be generated. (see `@out`)
Now, they would no longer be generated  (see `@in`).
I'm guessing `llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp` should be able to unfold this.

1. Am i on the right track?
2. Any other arches needed in tests?
3. Any other tests needed?


Repository:
  rL LLVM

https://reviews.llvm.org/D45563

Files:
  test/CodeGen/AArch64/unfold-masked-merge.ll
  test/CodeGen/X86/unfold-masked-merge.ll

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