[all-commits] [llvm/llvm-project] 5211af: [X86][AVX] combineExtractWithShuffle - combine ext...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5211af48181fe1a1ac99aeacf15818c50bfbda7d
      https://github.com/llvm/llvm-project/commit/5211af48181fe1a1ac99aeacf15818c50bfbda7d
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-02-01 (Mon, 01 Feb 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vec-strict-inttofp-256.ll
    M llvm/test/CodeGen/X86/vector-constrained-fp-intrinsics.ll

  Log Message:
  -----------
  [X86][AVX] combineExtractWithShuffle - combine extracts from 256/512-bit vector shuffles.

We can only legally extract from the lowest 128-bit subvector, so extract the correct subvector to allow us to handle 256/512-bit vector element extracts.