Allow null to be an element of NamedMDNode. e.g. !llvm.stuff = !{!0, !1, null}
llvm-svn: 92783
diff --git a/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp b/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
index 861de84..c409c20 100644
--- a/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
+++ b/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
@@ -223,7 +223,8 @@
if (const NamedMDNode *N = dyn_cast<NamedMDNode>(MD)) {
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
- EnumerateValue(N->getOperand(i));
+ if (MDNode *E = N->getOperand(i))
+ EnumerateValue(E);
MDValues.push_back(std::make_pair(MD, 1U));
MDValueMap[MD] = Values.size();
return;