[PATCH] D80047: Don't tail merge EHPads

[Eli Friedman via Phabricator via llvm-commits]

efriedma added reviewers: jyknight, efriedma.
efriedma added a comment.

I think it's specifically the tailIsWholeBlock() cases that require more care to handle your example correctly, in BranchFolder::TryTailMergeBlocks.    The general transform is fine.  -verify-machineinstrs should catch the transform in your example, I think.

Well, there are also potential issues on Windows involving funclets, but it looks like that isn't the problem here.


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D80047