[all-commits] [llvm/llvm-project] f1b76c: X86] combineConcatVectorOps - IsConcatFree - peek ...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f1b76c53b6312a10d2ee4219e980498e7cbe5d53
      https://github.com/llvm/llvm-project/commit/f1b76c53b6312a10d2ee4219e980498e7cbe5d53
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-07-23 (Tue, 23 Jul 2024)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vselect-avx.ll

  Log Message:
  -----------
  X86] combineConcatVectorOps - IsConcatFree - peek through bitcasts to find inplace subvectors.

The EXTRACT_SUBVECTOR nodes don't have to be the same type, they just need to be at the correct bit offsets when concatenated back together.

This reapplies d43ec97de081755990264049eba09cb7c83cb321 (after being reverted 68cb903594cd03dd708ef70c85c10807a6deefb5) now that 65e86a8f3fb44dc09dc2e08526d69e3a57f63995 has landed to address a downstream issue.



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