diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 285085801be..2bd9fabb81e 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -45,8 +45,9 @@ namespace {
 
 void LiveIntervals::getAnalysisUsage(AnalysisUsage &AU) const
 {
-    AU.setPreservesAll();
+    AU.addPreserved<LiveVariables>();
     AU.addRequired<LiveVariables>();
+    AU.addPreservedID(PHIEliminationID);
     AU.addRequiredID(PHIEliminationID);
     MachineFunctionPass::getAnalysisUsage(AU);
 }