[PATCH] D122783: [PowerPC] Mark side effects of Power9 darn instruction

[Kai Luo via Phabricator via llvm-commits]

lkail added a comment.

Could you also add test of `opt -passes='default<O3>'` to ensure we don't optimize it out?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D122783/new/

https://reviews.llvm.org/D122783