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

[Sam McCall via Phabricator via cfe-commits]

sammccall added reviewers: ymandel, xazax.hun.
sammccall added a comment.

The idea with the change to Environment::join() is that the current signature forces the base environment to be mutable, but this sometimes forces the caller to make a copy, and the implementation actually copies everything anyway...


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D153493/new/

https://reviews.llvm.org/D153493