Added lazy "symbolication" of parameter variables and global variables.
Added recording of divide-by-zero and divide-by-uninitialized nodes.

llvm-svn: 47586
diff --git a/clang/Analysis/ValueState.cpp b/clang/Analysis/ValueState.cpp
index 75f719a..03b2996 100644
--- a/clang/Analysis/ValueState.cpp
+++ b/clang/Analysis/ValueState.cpp
@@ -78,8 +78,16 @@
   // Iterate over the variable bindings.
 
   for (ValueState::vb_iterator I = St.vb_begin(), E = St.vb_end(); I!=E ; ++I)
-    if (Liveness.isLive(Loc, I.getKey()))
+    if (Liveness.isLive(Loc, I.getKey())) {
       WList.push_back(I.getKey());
+      
+      RVal X = I.getData();
+      
+      for (RVal::symbol_iterator SI = X.symbol_begin(), SE = X.symbol_end(); 
+           SI != SE; ++SI) {        
+        MarkedSymbols.insert(*SI);
+      }
+    }
 
   // Perform the mark-and-sweep.