diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 2347c6b567a..4f17e31f716 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -59,7 +59,7 @@ namespace {
     cl::opt<bool>
     join("join-liveintervals",
          cl::desc("Join compatible live intervals"),
-         cl::init(true));
+         cl::init(false));
 };
 
 void LiveIntervals::getAnalysisUsage(AnalysisUsage &AU) const