[all-commits] [llvm/llvm-project] 69a211: [DAG] Fold trunc(srl(extract_elt(vec, c1), c2)) -> e...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 69a21154caa5b53d302cd3bfd7ce0ec1a0c3d985
      https://github.com/llvm/llvm-project/commit/69a21154caa5b53d302cd3bfd7ce0ec1a0c3d985
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-09-13 (Fri, 13 Sep 2024)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/test/CodeGen/AArch64/expand-select.ll

  Log Message:
  -----------
  [DAG] Fold trunc(srl(extract_elt(vec,c1),c2)) -> extract_elt(bitcast(vec),c3) (#107987)

Extends existing trunc(extract_elt(vec,c1)) -> extract_elt(bitcast(vec),c3) fold.

Noticed while working on #107404



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