Add support for undef


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17055 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/ExecutionEngine.cpp b/lib/ExecutionEngine/ExecutionEngine.cpp
index b239cc2..208f8e2 100644
--- a/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -440,7 +440,9 @@
 // specified memory location...
 //
 void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
-  if (Init->getType()->isFirstClassType()) {
+  if (isa<UndefValue>(Init)) {
+    return;
+  } else if (Init->getType()->isFirstClassType()) {
     GenericValue Val = getConstantValue(Init);
     StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
     return;