[PATCH] D14632: [MachineSink] Don't break ImplicitNulls

[David Majnemer via llvm-commits]

majnemer added a subscriber: majnemer.

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Comment at: lib/CodeGen/MachineSink.cpp:694
@@ +693,3 @@
+  auto *PredMBB = *MBB->pred_begin();
+  auto *PredBB = PredMBB->getBasicBlock();
+
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Can't `getBasicBlock` fail?  IIRC, `MachineBasicBlock`s aren't obligated to map back to a `BasicBlock`.


http://reviews.llvm.org/D14632