Index: lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
===================================================================
--- lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -1032,8 +1032,25 @@
   }
 
   // Otherwise, we have to make a token factor node.
-  SDValue Root = DAG.getNode(ISD::TokenFactor, getCurSDLoc(), MVT::Other,
-                             PendingLoads);
+  // If we have >= 2^16 loads then split across multiple token factors as
+  // there's a 64k limit on the number of SDNode operands.
+  SDValue Root;
+  size_t Limit = (1 << 16) - 1;
+  if (PendingLoads.size() <= Limit) {
+    Root =
+        DAG.getNode(ISD::TokenFactor, getCurSDLoc(), MVT::Other, PendingLoads);
+  } else {
+    SmallVector<SDValue, 4> TokenFactors;
+    for (unsigned i = 0; i < PendingLoads.size(); i += Limit) {
+      auto LoadSlice = ArrayRef<SDValue>(PendingLoads)
+                           .slice(i, std::min(Limit, PendingLoads.size() - i));
+      assert(LoadSlice.size() <= Limit && "Too many loads in slice");
+      TokenFactors.emplace_back(
+          DAG.getNode(ISD::TokenFactor, getCurSDLoc(), MVT::Other, LoadSlice));
+    }
+    Root =
+        DAG.getNode(ISD::TokenFactor, getCurSDLoc(), MVT::Other, TokenFactors);
+  }
   PendingLoads.clear();
   DAG.setRoot(Root);
   return Root;