diff --git a/lib/CodeGen/CalcSpillWeights.cpp b/lib/CodeGen/CalcSpillWeights.cpp
index e5894b8..5d722ee 100644
--- a/lib/CodeGen/CalcSpillWeights.cpp
+++ b/lib/CodeGen/CalcSpillWeights.cpp
@@ -165,7 +165,7 @@
     return;
 
   // Mark li as unspillable if all live ranges are tiny.
-  if (li.isZeroLength()) {
+  if (li.isZeroLength(LIS.getSlotIndexes())) {
     li.markNotSpillable();
     return;
   }