[opaque pointer types] Switch a few cases of getElementType over, since I had them lying around anyway

llvm-svn: 247610
diff --git a/llvm/lib/Transforms/IPO/MergeFunctions.cpp b/llvm/lib/Transforms/IPO/MergeFunctions.cpp
index a1f4513..2b0bcdf 100644
--- a/llvm/lib/Transforms/IPO/MergeFunctions.cpp
+++ b/llvm/lib/Transforms/IPO/MergeFunctions.cpp
@@ -1682,9 +1682,7 @@
 
 // Replace G with an alias to F and delete G.
 void MergeFunctions::writeAlias(Function *F, Function *G) {
-  PointerType *PTy = G->getType();
-  auto *GA = GlobalAlias::create(PTy->getElementType(), PTy->getAddressSpace(),
-                                 G->getLinkage(), "", F);
+  auto *GA = GlobalAlias::create(G->getLinkage(), "", F);
   F->setAlignment(std::max(F->getAlignment(), G->getAlignment()));
   GA->takeName(G);
   GA->setVisibility(G->getVisibility());