diff --git a/lib/CodeGen/IfConversion.cpp b/lib/CodeGen/IfConversion.cpp
index ea4e68dbdaf..819d4731fb9 100644
--- a/lib/CodeGen/IfConversion.cpp
+++ b/lib/CodeGen/IfConversion.cpp
@@ -1228,10 +1228,17 @@ bool IfConverter::IfConvertDiamond(BBInfo &BBI, IfcvtKind Kind,
     ++DI2;
   BBI1->NonPredSize -= NumDups1;
   BBI2->NonPredSize -= NumDups1;
+
+  // Skip past the dups on each side separately since there may be
+  // differing dbg_value entries.
+  for (unsigned i = 0; i < NumDups1; ++DI1) {
+    if (!DI1->isDebugValue())
+      ++i;
+  }
   while (NumDups1 != 0) {
-    ++DI1;
     ++DI2;
-    --NumDups1;
+    if (!DI2->isDebugValue())
+      --NumDups1;
   }
 
   UpdatePredRedefs(BBI1->BB->begin(), DI1, Redefs, TRI);