[PATCH] D89088: [MBP] Add whole chain to BlockFilterSet instead of individual BB

[Guozhi Wei via Phabricator via llvm-commits]

Carrot added a comment.

Then it should be an unknown bug in MBP.

You can debug the function MachineBlockPlacement::buildCFGChains() from following 2 lines, and try to find out when the first BB in FunctionChain is changed.

  BlockChain &FunctionChain = *BlockToChain[&F->front()];
  buildChain(&F->front(), FunctionChain);

Sorry I can't help you to debug it.


Repository:
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https://reviews.llvm.org/D89088