VM: [Kernel] Ensure we record [FieldLoadInstr]s in the ParsedFunction when using field guards

runtime/vm/intermediate_language.h

 // Copyright (c) 2013, 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.
 
 #ifndef RUNTIME_VM_INTERMEDIATE_LANGUAGE_H_
 #define RUNTIME_VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 4271 matching lines @@
         token_pos_(token_pos) {
     ASSERT(offset_in_bytes >= 0);
     // May be null if field is not an instance.
     ASSERT(type.IsZoneHandle() || type.IsReadOnlyHandle());
     SetInputAt(0, instance);
   }
 
   LoadFieldInstr(Value* instance,
                  const Field* field,
                  const AbstractType& type,
-                 TokenPosition token_pos)
+                 TokenPosition token_pos,
+                 const ParsedFunction* parsed_function)
       : offset_in_bytes_(field->Offset()),
         type_(type),
         result_cid_(kDynamicCid),
         immutable_(false),
         recognized_kind_(MethodRecognizer::kUnknown),
         field_(field),
         token_pos_(token_pos) {
     ASSERT(field->IsZoneHandle());
     // May be null if field is not an instance.
     ASSERT(type.IsZoneHandle() || type.IsReadOnlyHandle());
     SetInputAt(0, instance);
+
+    if (parsed_function != NULL && field->guarded_cid() != kIllegalCid) {
+      if (!field->is_nullable() || (field->guarded_cid() == kNullCid)) {
+        set_result_cid(field->guarded_cid());
+      }
+      parsed_function->AddToGuardedFields(field);
+    }
   }
 
   void set_is_immutable(bool value) { immutable_ = value; }
 
   Value* instance() const { return inputs_[0]; }
   intptr_t offset_in_bytes() const { return offset_in_bytes_; }
   const AbstractType& type() const { return type_; }
   void set_result_cid(intptr_t value) { result_cid_ = value; }
   intptr_t result_cid() const { return result_cid_; }
   virtual TokenPosition token_pos() const { return token_pos_; }
@@ skipping 3710 matching lines @@
   LocationSummary* Name::MakeLocationSummary(Zone* zone, bool opt) const {     \
     UNIMPLEMENTED();                                                           \
     return NULL;                                                               \
   }                                                                            \
   void Name::EmitNativeCode(FlowGraphCompiler* compiler) { UNIMPLEMENTED(); }
 
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_INTERMEDIATE_LANGUAGE_H_