[all-commits] [llvm/llvm-project] e16cc8: [AArch64] Guard for 128bit vectors in mull combine...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e16cc8ed4636c36fc6e4e95289faf94048ec79b2
      https://github.com/llvm/llvm-project/commit/e16cc8ed4636c36fc6e4e95289faf94048ec79b2
  Author: David Green <david.green at arm.com>
  Date:   2025-11-28 (Fri, 28 Nov 2025)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/neon-extadd-extract.ll

  Log Message:
  -----------
  [AArch64] Guard for 128bit vectors in mull combine. (#169839)

The test case generates a extract_subvector(index) leading into a mul.
Make sure we don't try and treat the scalable vector extract as a 128bit
vector in the mull combine.

Fixes #168912



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