[PATCH] D140438: [IR/MachineOutliner] Add a "nooutline" function attr and respect it

[Jessica Paquette via Phabricator via llvm-commits]

paquette created this revision.
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Add `nooutline` + update LangRef to say it exists.

This makes it possible to say "don't outline from this function ever."

We want to be able to toggle whether or not a function should be in the search set regardless of default behaviour.

Add testcases for the IR + Machine outliners.


https://reviews.llvm.org/D140438

Files:
  llvm/docs/LangRef.rst
  llvm/lib/CodeGen/MachineOutliner.cpp
  llvm/lib/Transforms/IPO/IROutliner.cpp
  llvm/test/CodeGen/AArch64/machine-outliner-nooutline-attribute.mir
  llvm/test/Transforms/IROutliner/nooutline-attribute.ll

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