Clear HandleMap and ReplaceMap after instruction selection. Or it may cause
non-deterministic behavior.

llvm-svn: 28454
diff --git a/llvm/lib/Target/Alpha/AlphaISelDAGToDAG.cpp b/llvm/lib/Target/Alpha/AlphaISelDAGToDAG.cpp
index 772da03..8126c33 100644
--- a/llvm/lib/Target/Alpha/AlphaISelDAGToDAG.cpp
+++ b/llvm/lib/Target/Alpha/AlphaISelDAGToDAG.cpp
@@ -155,6 +155,8 @@
   // Select target instructions for the DAG.
   DAG.setRoot(SelectRoot(DAG.getRoot()));
   CodeGenMap.clear();
+  HandleMap.clear();
+  ReplaceMap.clear();
   DAG.RemoveDeadNodes();
   
   // Emit machine code to BB.