diff --git a/lib/CodeGen/StrongPHIElimination.cpp b/lib/CodeGen/StrongPHIElimination.cpp
index 97e4fb9..449ef38 100644
--- a/lib/CodeGen/StrongPHIElimination.cpp
+++ b/lib/CodeGen/StrongPHIElimination.cpp
@@ -27,6 +27,7 @@
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/MachineLoopInfo.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/RegisterCoalescer.h"
 #include "llvm/Target/TargetInstrInfo.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/ADT/DepthFirstIterator.h"
@@ -34,7 +35,6 @@
 #include "llvm/Support/Compiler.h"
 using namespace llvm;
 
-
 namespace {
   struct VISIBILITY_HIDDEN StrongPHIElimination : public MachineFunctionPass {
     static char ID; // Pass identification, replacement for typeid
@@ -74,6 +74,7 @@
       
       // TODO: Actually make this true.
       AU.addPreserved<LiveIntervals>();
+      AU.addPreserved<RegisterCoalescer>();
       MachineFunctionPass::getAnalysisUsage(AU);
     }
     
@@ -921,5 +922,7 @@
     PInstr->eraseFromParent();
   }
   
+  LI.computeNumbering();
+  
   return true;
 }