[all-commits] [llvm/llvm-project] 559cfe: [AArch64][SME] Introduce CHECK_MATCHING_VL pseudo ...

[Mary Kassayova via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 559cfefee1b2d739f4d4ccd89767c63713917122
      https://github.com/llvm/llvm-project/commit/559cfefee1b2d739f4d4ccd89767c63713917122
  Author: Mary Kassayova <mary.kassayova at arm.com>
  Date:   2025-09-17 (Wed, 17 Sep 2025)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.h
    M llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
    M llvm/test/CodeGen/AArch64/sme-callee-save-restore-pairs.ll
    M llvm/test/CodeGen/AArch64/sme-peephole-opts.ll
    A llvm/test/CodeGen/AArch64/sme-streaming-checkvl-mir.ll
    A llvm/test/CodeGen/AArch64/sme-streaming-checkvl.ll
    M llvm/test/CodeGen/AArch64/sme-streaming-compatible-interface.ll
    M llvm/test/CodeGen/AArch64/sme-vg-to-stack.ll
    M llvm/test/CodeGen/AArch64/spill-reload-remarks.ll

  Log Message:
  -----------
  [AArch64][SME] Introduce CHECK_MATCHING_VL pseudo for streaming  transitions (#157510)

This patch adds a new codegen-only pseudo-instruction,
`CHECK_MATCHING_VL`, used when transitioning between non-streaming /
streaming-compatible callers and streaming-enabled callees. The pseudo
verifies that the current SVE vector length (VL) matches the streaming
vector length (SVL); if they differ, we trap.



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