[PATCH] D157621: [CHR] Fix up phi nodes with unreachable predecessors

[Nikita Popov via Phabricator via llvm-commits]

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If a block in the CHR region has an unreachable predecessor, then there will be no edge from that predecessor to the newly cloned block. However, a phi node entry for it will be left behind. Make sure that these incoming blocks get dropped as well.


https://reviews.llvm.org/D157621

Files:
  llvm/lib/Transforms/Instrumentation/ControlHeightReduction.cpp
  llvm/test/Transforms/PGOProfile/chr-dead-pred.ll

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