Index: lib/Analysis/ScopBuilder.cpp
===================================================================
--- lib/Analysis/ScopBuilder.cpp
+++ lib/Analysis/ScopBuilder.cpp
@@ -295,6 +295,8 @@
     llvm_unreachable("Unknown mod ref behaviour cannot be represented.");
   case llvm::FMRB_DoesNotAccessMemory:
     return true;
+  case llvm::FMRB_DoesNotReadMemory:
+    return true;
   case llvm::FMRB_OnlyReadsMemory:
     GlobalReads.push_back(CI);
     return true;
Index: lib/Analysis/ScopDetection.cpp
===================================================================
--- lib/Analysis/ScopDetection.cpp
+++ lib/Analysis/ScopDetection.cpp
@@ -536,6 +536,8 @@
 
       Context.AST.add(&CI);
       return true;
+    case FMRB_DoesNotReadMemory:
+      return true;
     }
   }