Fix a use-of-dangling-pointer bug, from the introduction of SrcValue's.

llvm-svn: 22679
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index e45e708e..6a018a5 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -215,6 +215,11 @@
   case ISD::VALUETYPE:
     ValueTypeNodes[cast<VTSDNode>(N)->getVT()] = 0;
     break;
+  case ISD::SRCVALUE: {
+    SrcValueSDNode *SVN = cast<SrcValueSDNode>(N);
+    ValueNodes.erase(std::make_pair(SVN->getValue(), SVN->getOffset()));
+    break;
+  }    
   case ISD::LOAD:
     Loads.erase(std::make_pair(N->getOperand(1),
                                std::make_pair(N->getOperand(0),