[PATCH] D45889: [MemCpyOpt] Do not iterate beyond beginning of basic block

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

This sort of thing gets very confusing; it would be better to explicitly reject unreachable blocks in MemCpyOptPass::iterateOnFunction.


Repository:
  rL LLVM

https://reviews.llvm.org/D45889