[PATCH] D64376: [MBP] Avoid tail duplication if it can't bring benefit

[David Li via Phabricator via llvm-commits]

davidxl added inline comments.


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Comment at: lib/CodeGen/MachineBlockPlacement.cpp:1164
+  if ((NumDup > Succ->succ_size()) || !Duplicate)
+    return false;
   return true;
----------------
Can you add a // FIXME here to add support to tail dup to some of the predecessors.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D64376/new/

https://reviews.llvm.org/D64376