Fix MSVC build broken by r207580

Seems MSVC wants to be able to codegen inline-definitions of virtual
functions even in TUs that don't define the key function - and it's well
within its rights to do so.

llvm-svn: 207581

llvm/include/llvm/ExecutionEngine/ExecutionEngine.h

@@ -222,10 +222,7 @@ public:
   /// needed by another object.
   ///
   /// MCJIT will take ownership of the ObjectFile.
-  virtual void addObjectFile(std::unique_ptr<object::ObjectFile> O) {
-    llvm_unreachable(
-      "ExecutionEngine subclass doesn't implement addObjectFile.");
-  }
+  virtual void addObjectFile(std::unique_ptr<object::ObjectFile> O);
 
   /// addArchive - Add an Archive to the execution engine.
   ///

llvm/lib/ExecutionEngine/ExecutionEngine.cpp

@@ -24,6 +24,7 @@
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Operator.h"
 #include "llvm/IR/ValueHandle.h"
+#include "llvm/Object/ObjectFile.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/DynamicLibrary.h"
 #include "llvm/Support/ErrorHandling.h"
@@ -121,6 +122,10 @@ char *ExecutionEngine::getMemoryForGV(const GlobalVariable *GV) {
   return GVMemoryBlock::Create(GV, *getDataLayout());
 }
 
+void ExecutionEngine::addObjectFile(std::unique_ptr<object::ObjectFile> O) {
+  llvm_unreachable("ExecutionEngine subclass doesn't implement addObjectFile.");
+}
+
 bool ExecutionEngine::removeModule(Module *M) {
   for(SmallVectorImpl<Module *>::iterator I = Modules.begin(),
         E = Modules.end(); I != E; ++I) {