Move ConstantExpr to 2.5 API.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77494 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/MergeFunctions.cpp b/lib/Transforms/IPO/MergeFunctions.cpp
index 3b54462..db8a817 100644
--- a/lib/Transforms/IPO/MergeFunctions.cpp
+++ b/lib/Transforms/IPO/MergeFunctions.cpp
@@ -521,7 +521,7 @@
 
   GlobalAlias *GA = new GlobalAlias(
     G->getType(), G->getLinkage(), "",
-    F->getContext().getConstantExprBitCast(F, G->getType()), G->getParent());
+    ConstantExpr::getBitCast(F, G->getType()), G->getParent());
   F->setAlignment(std::max(F->getAlignment(), G->getAlignment()));
   GA->takeName(G);
   GA->setVisibility(G->getVisibility());