Fix a major problem with global variable initializers. This could cause

us to have stuff pointing to the null pointer, which makes no sense
(the null ptr is an ssa value, not the null object)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20922 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/IPA/Andersens.cpp

@@ -578,7 +578,8 @@ Andersens::Node *Andersens::getNodeForConstantPointerTarget(Constant *C) {
 void Andersens::AddGlobalInitializerConstraints(Node *N, Constant *C) {
   if (C->getType()->isFirstClassType()) {
     if (isa<PointerType>(C->getType()))
-      N->addPointerTo(getNodeForConstantPointer(C));
+      N->copyFrom(getNodeForConstantPointer(C));
+                                       
   } else if (C->isNullValue()) {
     N->addPointerTo(&GraphNodes[NullObject]);
     return;