Index: lib/CodeGen/PPCGCodeGeneration.cpp
===================================================================
--- lib/CodeGen/PPCGCodeGeneration.cpp
+++ lib/CodeGen/PPCGCodeGeneration.cpp
@@ -1478,9 +1478,6 @@
   SubtreeReferences References = {
       LI, SE, S, ValueMap, SubtreeValues, SCEVs, getBlockGenerator()};
 
-  for (const auto &I : IDToValue)
-    SubtreeValues.insert(I.second);
-
   // NOTE: this is populated in IslNodeBuilder::addParameters
   // See [Code generation of induction variables of loops outside Scops].
   for (const auto &I : OutsideLoopIterations)