[PATCH] D153493: [dataflow] avoid more accidental copies of Environment

[Sam McCall via Phabricator via cfe-commits]

sammccall added a comment.

BTW i thought this was just nice for debugging and saving copying a few maps, but Dmitri says that the way even trivial indirections like `(FC1 = FC2)`, `(FC2 = ...)` are expressed in the SAT solver means they can add significant cost there too...


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D153493/new/

https://reviews.llvm.org/D153493