[all-commits] [llvm/llvm-project] e95362: [X86] combineX86ShuffleChainWithExtract - ensure s...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e953623f50929dfa038d4d7d234f9822d63dc729
      https://github.com/llvm/llvm-project/commit/e953623f50929dfa038d4d7d234f9822d63dc729
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-06-05 (Thu, 05 Jun 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-interleaved-load-i8-stride-7.ll
    M llvm/test/CodeGen/X86/vector-shuffle-combining-avx512vl.ll

  Log Message:
  -----------
  [X86] combineX86ShuffleChainWithExtract - ensure subvector widening is at index 0 (#143009)

When peeking through insert_subvector(undef,sub,c) widening patterns we
didn't ensure c == 0

Fixes #142995



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