[all-commits] [llvm/llvm-project] 22a3e6: release/20.x: [AArch64] Handle XAR with v1i64 oper...

[David Green via All-commits]

  Branch: refs/heads/release/20.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 22a3e6b194092182c592bdf48eef9d37c53b0cbf
      https://github.com/llvm/llvm-project/commit/22a3e6b194092182c592bdf48eef9d37c53b0cbf
  Author: David Green <david.green at arm.com>
  Date:   2025-06-11 (Wed, 11 Jun 2025)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
    M llvm/test/CodeGen/AArch64/xar.ll

  Log Message:
  -----------
  release/20.x: [AArch64] Handle XAR with v1i64 operand types (#141754)

When converting ROTR(XOR(a, b)) to XAR(a, b), or ROTR(a, a) to XAR(a, zero)
we were not handling v1i64 types, meaning illegal copies get generated. This
addresses that by generating insert_subreg and extract_subreg for v1i64 to
keep the values with the correct types.

Fixes #141746



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