Collect type feedback for fields.

runtime/vm/raw_object.h

 // 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.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 646 matching lines @@
 
 class RawField : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Field);
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->name_); }
   RawString* name_;
   RawObject* owner_;  // Class or patch class or mixin class
                       // where this field is defined.
   RawAbstractType* type_;
   RawInstance* value_;  // Offset in words for instance and value for static.
-  RawObject** to() { return reinterpret_cast<RawObject**>(&ptr()->value_); }
+  RawArray* dependent_code_;
+  RawObject** to() {
+    return reinterpret_cast<RawObject**>(&ptr()->dependent_code_);
+  }
 
   intptr_t token_pos_;
+  intptr_t guarded_cid_;
+  intptr_t is_nullable_;  // kNullCid if field can contain null value and
+                          // kIllegalCid otherwise.
   uint8_t kind_bits_;  // static, final, const, has initializer.
 };
 
 
 class RawLiteralToken : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(LiteralToken);
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->literal_);
   }
@@ skipping 122 matching lines @@
   RawInstructions* instructions_;
   RawFunction* function_;
   RawExceptionHandlers* exception_handlers_;
   RawPcDescriptors* pc_descriptors_;
   RawArray* deopt_info_array_;
   RawArray* object_table_;
   RawArray* static_calls_target_table_;  // (code-offset, function, code).
   RawArray* stackmaps_;
   RawLocalVarDescriptors* var_descriptors_;
   RawArray* comments_;
+  RawArray* guarded_fields_;
   RawObject** to() {
-    return reinterpret_cast<RawObject**>(&ptr()->comments_);
+    return reinterpret_cast<RawObject**>(&ptr()->guarded_fields_);
   }
 
   intptr_t pointer_offsets_length_;
   // These fields cannot be boolean because of alignment issues on x64
   // architectures.
   intptr_t is_optimized_;
   // If true, the embedded object pointers will be visited during GC.
   intptr_t is_alive_;
 
   // Variable length data follows here.
@@ skipping 1051 matching lines @@
 inline intptr_t RawObject::NumberOfTypedDataClasses() {
   // Make sure this is updated when new TypedData types are added.
   ASSERT(kExternalTypedDataInt8ArrayCid == kTypedDataInt8ArrayCid + 11);
   ASSERT(kNullCid == kExternalTypedDataInt8ArrayCid + 11);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_