Fixes issue 18099: missed type guard dependency in implicit getters.

runtime/vm/flow_graph_builder.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/flow_graph_builder.h"
 
 #include "lib/invocation_mirror.h"
 #include "vm/ast_printer.h"
 #include "vm/bit_vector.h"
 #include "vm/class_finalizer.h"
@@ skipping 3070 matching lines @@
 
 void EffectGraphVisitor::VisitLoadInstanceFieldNode(
     LoadInstanceFieldNode* node) {
   ValueGraphVisitor for_instance(owner());
   node->instance()->Visit(&for_instance);
   Append(for_instance);
   LoadFieldInstr* load = new LoadFieldInstr(
       for_instance.value(),
       &node->field(),
       AbstractType::ZoneHandle(node->field().type()));
-  if (owner()->exit_collector() != NULL) {
-    // While inlining into an optimized function, the field has
-    // to be added to the list of guarded fields of the caller.
-    if (node->field().guarded_cid() != kIllegalCid) {
-      if (!node->field().is_nullable() ||
-          (node->field().guarded_cid() == kNullCid)) {
-        load->set_result_cid(node->field().guarded_cid());
-      }
-      FlowGraph::AddToGuardedFields(owner()->guarded_fields(), &node->field());
+  if (node->field().guarded_cid() != kIllegalCid) {
+    if (!node->field().is_nullable() ||
+        (node->field().guarded_cid() == kNullCid)) {
+      load->set_result_cid(node->field().guarded_cid());
     }
+    FlowGraph::AddToGuardedFields(owner()->guarded_fields(), &node->field());
   }
   ReturnDefinition(load);
 }
 
 
 void EffectGraphVisitor::VisitStoreInstanceFieldNode(
     StoreInstanceFieldNode* node) {
   ValueGraphVisitor for_instance(owner());
   node->instance()->Visit(&for_instance);
   Append(for_instance);
@@ skipping 777 matching lines @@
                                   LanguageError::kError,
                                   Heap::kNew,
                                   "FlowGraphBuilder Bailout: %s %s",
                                   String::Handle(function.name()).ToCString(),
                                   reason));
   Isolate::Current()->long_jump_base()->Jump(1, error);
 }
 
 
 }  // namespace dart