diff --git a/llvm/lib/CodeGen/MachinePipeliner.cpp b/llvm/lib/CodeGen/MachinePipeliner.cpp
--- a/llvm/lib/CodeGen/MachinePipeliner.cpp
+++ b/llvm/lib/CodeGen/MachinePipeliner.cpp
@@ -2280,7 +2280,7 @@
   MachineInstr *DefS = MRI.getVRegDef(BaseOpS->getReg());
   MachineInstr *DefD = MRI.getVRegDef(BaseOpD->getReg());
   if (!DefS || !DefD || !DefS->isPHI() || !DefD->isPHI())
-    return true;
+    return false;
 
   unsigned InitValS = 0;
   unsigned LoopValS = 0;