[all-commits] [llvm/llvm-project] 8478de: [LLVM][CodeGen] Remove failure cases when widening...

[Paul Walker via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8478de3d00a7a16b532b3902d5d9794405ae2379
      https://github.com/llvm/llvm-project/commit/8478de3d00a7a16b532b3902d5d9794405ae2379
  Author: Paul Walker <paul.walker at arm.com>
  Date:   2025-12-01 (Mon, 01 Dec 2025)

  Changed paths:
    M llvm/include/llvm/CodeGen/SelectionDAG.h
    M llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/test/CodeGen/AArch64/sve-extract-scalable-vector.ll
    M llvm/test/CodeGen/AArch64/sve-insert-vector.ll

  Log Message:
  -----------
  [LLVM][CodeGen] Remove failure cases when widening EXTRACT/INSERT_SUBVECTOR. (#162308)

This PR implements catch all handling for widening the scalable
subvector operand (INSERT_SUBVECTOR) or result (EXTRACT_SUBVECTOR). It
does this via the stack using masked memory operations. With general
handling available we can add optimiations for specific cases.



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