[VM generic function reification] Support generic functions in Invocation class.

runtime/vm/precompiler.cc

Index: runtime/vm/precompiler.cc
diff --git a/runtime/vm/precompiler.cc b/runtime/vm/precompiler.cc
index fa650c4027686b2d821132965e1e3fd391263353..6c27c195592b824db7671d8cbd3db2a929d33954 100644
--- a/runtime/vm/precompiler.cc
+++ b/runtime/vm/precompiler.cc
@@ -964,6 +964,8 @@ void Precompiler::AddCalleesOf(const Function& function) {
         instance ^= entry.raw();
         if (entry.IsAbstractType()) {
           AddType(AbstractType::Cast(entry));
+        } else if (entry.IsTypeArguments()) {
+          AddTypeArguments(TypeArguments::Cast(entry));
         } else {
           AddConstObject(instance);
         }
@@ -977,8 +979,6 @@ void Precompiler::AddCalleesOf(const Function& function) {
           cls ^= target_code.owner();
           AddInstantiatedClass(cls);
         }
-      } else if (entry.IsTypeArguments()) {
-        AddTypeArguments(TypeArguments::Cast(entry));
       }
     }
   }
@@ -1157,7 +1157,7 @@ void Precompiler::AddConstObject(const Instance& instance) {
     virtual void VisitPointers(RawObject** first, RawObject** last) {
       for (RawObject** current = first; current <= last; current++) {
         subinstance_ = *current;
-        if (subinstance_.IsInstance()) {
+        if (subinstance_.IsInstance() && !subinstance_.IsTypeArguments()) {
           precompiler_->AddConstObject(Instance::Cast(subinstance_));
         }
       }