Fix bug in AOT compiler where we would propogate a result type for instances calls where the target…

runtime/vm/object.cc

Index: runtime/vm/object.cc
diff --git a/runtime/vm/object.cc b/runtime/vm/object.cc
index b78a45279e14ebc914ea0cd0dbe4f3ee74655282..7858abe9696671e9b7ae1f4a0e18183c1daa07a3 100644
--- a/runtime/vm/object.cc
+++ b/runtime/vm/object.cc
@@ -13411,6 +13411,20 @@ bool ICData::HasOneTarget() const {
 }
 
 
+bool ICData::HasOnlyDispatcherTargets() const {
+  const intptr_t len = NumberOfChecks();
+  Function& target = Function::Handle();
+  for (intptr_t i = 0; i < len; i++) {
+    target = GetTargetAt(i);
+    if (!target.IsNoSuchMethodDispatcher() &&
+        !target.IsInvokeFieldDispatcher()) {
+      return false;
+    }
+  }
+  return true;
+}
+
+
 void ICData::GetUsedCidsForTwoArgs(GrowableArray<intptr_t>* first,
                                    GrowableArray<intptr_t>* second) const {
   ASSERT(NumArgsTested() == 2);