[PM] Port UnreachableBlockElim to the new Pass Manager

Differential Revision: http://reviews.llvm.org/D22124

llvm-svn: 274824
diff --git a/llvm/lib/CodeGen/CodeGen.cpp b/llvm/lib/CodeGen/CodeGen.cpp
index bea1bbe..b277c0b 100644
--- a/llvm/lib/CodeGen/CodeGen.cpp
+++ b/llvm/lib/CodeGen/CodeGen.cpp
@@ -81,7 +81,7 @@
   initializeTargetPassConfigPass(Registry);
   initializeTwoAddressInstructionPassPass(Registry);
   initializeUnpackMachineBundlesPass(Registry);
-  initializeUnreachableBlockElimPass(Registry);
+  initializeUnreachableBlockElimLegacyPassPass(Registry);
   initializeUnreachableMachineBlockElimPass(Registry);
   initializeVirtRegMapPass(Registry);
   initializeVirtRegRewriterPass(Registry);