Quick: Handle kMirOpNullCheck in LVN/GVN.

Change-Id: I0274e98cc61ccd1dbe0bd3e50deeb7d62bd1cb22
diff --git a/compiler/dex/local_value_numbering.cc b/compiler/dex/local_value_numbering.cc
index eb98916..0fb5e48 100644
--- a/compiler/dex/local_value_numbering.cc
+++ b/compiler/dex/local_value_numbering.cc
@@ -1448,6 +1448,10 @@
       }
       break;
 
+    case kMirOpNullCheck:
+      HandleNullCheck(mir, GetOperandValue(mir->ssa_rep->uses[0]));
+      break;
+
     case Instruction::INVOKE_DIRECT:
     case Instruction::INVOKE_DIRECT_RANGE:
     case Instruction::INVOKE_VIRTUAL: