Index: lib/CodeGen/MachinePipeliner.cpp
===================================================================
--- lib/CodeGen/MachinePipeliner.cpp
+++ lib/CodeGen/MachinePipeliner.cpp
@@ -3131,8 +3131,8 @@
       SI->hasOrderedMemoryRef() || DI->hasOrderedMemoryRef())
     return true;
 
-  // Only chain dependences between a load and store can be loop carried.
-  if (!DI->mayStore() || !SI->mayLoad())
+  if (!(DI->mayStore() && SI->mayLoad()) &&
+      !(DI->mayStore() && SI->mayStore()))
     return false;
 
   unsigned DeltaS, DeltaD;