[all-commits] [llvm/llvm-project] f914e8: [AArch64][SME] Add coalescer barrier for args/resu...

[Sander de Smalen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f914e8e77c4703814e2f2dcef1d4569b17837c92
      https://github.com/llvm/llvm-project/commit/f914e8e77c4703814e2f2dcef1d4569b17837c92
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2024-03-26 (Tue, 26 Mar 2024)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
    A llvm/test/CodeGen/AArch64/sme-avoid-coalescing-locally-streaming.ll
    M llvm/test/CodeGen/AArch64/sme-streaming-body-streaming-compatible-interface.ll
    M llvm/test/CodeGen/AArch64/sme-streaming-body.ll

  Log Message:
  -----------
  [AArch64][SME] Add coalescer barrier for args/results in locally streaming functions. (#85388)

Similar to how we protected FP/fixed-vector arguments and results from
calls, we should do the same for arguments/results from locally-streaming
functions such that those are not spilled/filled as ZPR registers.

This may cause a small regression (additional spills/fills), which is
addressed by #85386.



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