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

runtime/vm/intermediate_language.cc

Index: runtime/vm/intermediate_language.cc
diff --git a/runtime/vm/intermediate_language.cc b/runtime/vm/intermediate_language.cc
index 20b876e0257912444917573344e6ea6782e93a80..ab7c878e846a2b9d1be3bdb19ac5608f1ed6a5f1 100644
--- a/runtime/vm/intermediate_language.cc
+++ b/runtime/vm/intermediate_language.cc
@@ -3188,6 +3188,8 @@ void InstanceCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
 
 
 bool PolymorphicInstanceCallInstr::HasSingleRecognizedTarget() const {
+  if (FLAG_precompiled_mode && with_checks()) return false;
+
   return ic_data().HasOneTarget() &&
       (MethodRecognizer::RecognizeKind(
           Function::Handle(ic_data().GetTargetAt(0))) !=
@@ -3195,18 +3197,6 @@ bool PolymorphicInstanceCallInstr::HasSingleRecognizedTarget() const {
 }
 
 
-bool PolymorphicInstanceCallInstr::HasOnlyDispatcherTargets() const {
-  for (intptr_t i = 0; i < ic_data().NumberOfChecks(); ++i) {
-    const Function& target = Function::Handle(ic_data().GetTargetAt(i));
-    if (!target.IsNoSuchMethodDispatcher() &&
-        !target.IsInvokeFieldDispatcher()) {
-      return false;
-    }
-  }
-  return true;
-}
-
-
 // DBC does not support optimizing compiler and thus doesn't emit
 // PolymorphicInstanceCallInstr.
 #if !defined(TARGET_ARCH_DBC)