[PATCH] D86001: [MSAN] Avoid dangling ActualFnStart when replacing instruction

[Evgenii Stepanov via Phabricator via llvm-commits]

eugenis added a comment.

This adds future implementation complexity.

How about a different representation of ActualFnStart: the last instruction before the insertion point, or null if at the BB entry?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D86001/new/

https://reviews.llvm.org/D86001