[PATCH] D136361: [AArch64][SME] Disable GlobalISel/FastISel for SME functions.

[Sander de Smalen via Phabricator via llvm-commits]

sdesmalen created this revision.
sdesmalen added reviewers: aemerson, CarolineConcatto, david-arm.
Herald added subscribers: hiraditya, kristof.beyls, rovka.
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sdesmalen requested review of this revision.
Herald added a project: LLVM.
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This patch ensures that GlobalISel and FastISel fall back to regular DAG ISel when:

- A function requires streaming-mode to be enabled at the start/end of the function. This happens when the function has no streaming interface, but does have a streaming body.
- A function requires a lazy-save to be committed at the start of the function. This happens if the function has the `aarch64_pstate_za_new` attribute.
- A call to a function requires a change in streaming-mode.
- A call to a function requires a lazy-save buffer to be set up.

Patch by @CarolineConcatto


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D136361

Files:
  llvm/lib/Target/AArch64/AArch64FastISel.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/GISel/AArch64CallLowering.cpp
  llvm/test/CodeGen/AArch64/sme-disable-gisel-fisel.ll

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