Index: lib/ExecutionEngine/ExecutionEngine.cpp
===================================================================
--- lib/ExecutionEngine/ExecutionEngine.cpp
+++ lib/ExecutionEngine/ExecutionEngine.cpp
@@ -137,7 +137,8 @@
 
 Function *ExecutionEngine::FindFunctionNamed(const char *FnName) {
   for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
-    if (Function *F = Modules[i]->getFunction(FnName))
+    Function *F = Modules[i]->getFunction(FnName);
+    if (F && !F->isDeclaration())
       return F;
   }
   return nullptr;
Index: lib/ExecutionEngine/MCJIT/MCJIT.cpp
===================================================================
--- lib/ExecutionEngine/MCJIT/MCJIT.cpp
+++ lib/ExecutionEngine/MCJIT/MCJIT.cpp
@@ -410,7 +410,8 @@
                                                  ModulePtrSet::iterator I,
                                                  ModulePtrSet::iterator E) {
   for (; I != E; ++I) {
-    if (Function *F = (*I)->getFunction(FnName))
+    Function *F = (*I)->getFunction(FnName);
+    if (F && !F->isDeclaration())
       return F;
   }
   return nullptr;