[PATCH] D147668: [RFC][X86 isel] Remove lane requirement from lowerShuffleAsUNPCKAndPermute

[Han Zhu via Phabricator via llvm-commits]

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lowerShuffleAsUNPCKAndPermute requires the shuffle mask element to be in the
same lane in both the input and output vectors. This prevents it from matching
certain patterns for example in GHI
61964 <https://github.com/llvm/llvm-project/issues/61964>. Removing the lane
requirement fixes the issue.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147668

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/oddshuffles.ll
  llvm/test/CodeGen/X86/pr61964.ll
  llvm/test/CodeGen/X86/vector-interleaved-load-i32-stride-8.ll
  llvm/test/CodeGen/X86/vector-interleaved-store-i32-stride-5.ll
  llvm/test/CodeGen/X86/vector-interleaved-store-i32-stride-8.ll
  llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-5.ll
  llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-7.ll
  llvm/test/CodeGen/X86/vector-shuffle-128-v16.ll
  llvm/test/CodeGen/X86/vector-shuffle-256-v16.ll
  llvm/test/CodeGen/X86/vector-shuffle-256-v8.ll

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