[PATCH] D155406: [MemCpyOpt] implement multi BB stack-move optimization

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

@khei4 This happens when one of the instructions is in an unreachable block (disconnected from the CFG and not part of the DT). Missing the special cases here: https://github.com/llvm/llvm-project/blob/e41d383440883fa2f87012b765fcc2d450f6fd55/llvm/lib/IR/Dominators.cpp#L350-L353


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