GlobalDCE: Restore a statement accidentally removed in r285048.

llvm-svn: 285052
diff --git a/llvm/lib/Transforms/IPO/GlobalDCE.cpp b/llvm/lib/Transforms/IPO/GlobalDCE.cpp
index aaa9f89..7a04de3 100644
--- a/llvm/lib/Transforms/IPO/GlobalDCE.cpp
+++ b/llvm/lib/Transforms/IPO/GlobalDCE.cpp
@@ -182,6 +182,7 @@
   for (GlobalAlias *GA : DeadAliases)
     EraseUnusedGlobalValue(GA);
 
+  NumIFuncs += DeadIFuncs.size();
   for (GlobalIFunc *GIF : DeadIFuncs)
     EraseUnusedGlobalValue(GIF);