[PM] Port ConstantMerge to the new pass manager.

llvm-svn: 268582
diff --git a/llvm/lib/Transforms/IPO/IPO.cpp b/llvm/lib/Transforms/IPO/IPO.cpp
index 563ecf7..8cdefe3 100644
--- a/llvm/lib/Transforms/IPO/IPO.cpp
+++ b/llvm/lib/Transforms/IPO/IPO.cpp
@@ -24,7 +24,7 @@
 
 void llvm::initializeIPO(PassRegistry &Registry) {
   initializeArgPromotionPass(Registry);
-  initializeConstantMergePass(Registry);
+  initializeConstantMergeLegacyPassPass(Registry);
   initializeCrossDSOCFIPass(Registry);
   initializeDAEPass(Registry);
   initializeDAHPass(Registry);