No need to map NULL operands of metadata
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94091 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/ValueMapper.cpp b/lib/Transforms/Utils/ValueMapper.cpp
index e3ef79f..2a79b72 100644
--- a/lib/Transforms/Utils/ValueMapper.cpp
+++ b/lib/Transforms/Utils/ValueMapper.cpp
@@ -39,7 +39,7 @@
const MDNode *MD = dyn_cast<MDNode>(V);
SmallVector<Value*, 4> Elts;
for (unsigned i = 0; i != MD->getNumOperands(); i++)
- Elts.push_back(MapValue(MD->getOperand(i), VM));
+ Elts.push_back(MD->getOperand(i) ? MapValue(MD->getOperand(i), VM) : NULL);
return VM[V] = MDNode::get(V->getContext(), Elts.data(), Elts.size());
}