// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

type TieringState extends uint16 constexpr 'TieringState';

bitfield struct FeedbackVectorFlags extends uint32 {
  tiering_state: TieringState: 3 bit;
  // Whether the maybe_optimized_code field contains a code object. 'maybe',
  // because they flag may lag behind the actual state of the world (it will be
  // updated in time).
  maybe_has_optimized_code: bool: 1 bit;
  // Just one bit, since only {kNone,kInProgress} are relevant for OSR.
  osr_tiering_state: TieringState: 1 bit;
  all_your_bits_are_belong_to_jgruber: uint32: 27 bit;
}

@generateBodyDescriptor
extern class FeedbackVector extends HeapObject {
  const length: int32;
  invocation_count: int32;
  profiler_ticks: int32;
  // TODO(turboprop, v8:11010): This field could be removed by changing the
  // tier up checks for Turboprop. If removing this field also check v8:9287.
  // Padding was necessary for GCMole.
  flags: FeedbackVectorFlags;
  shared_function_info: SharedFunctionInfo;
  closure_feedback_cell_array: ClosureFeedbackCellArray;
  @if(V8_EXTERNAL_CODE_SPACE) maybe_optimized_code: Weak<CodeDataContainer>;
  @ifnot(V8_EXTERNAL_CODE_SPACE) maybe_optimized_code: Weak<Code>;
  @cppRelaxedLoad raw_feedback_slots[length]: MaybeObject;
}

extern class FeedbackMetadata extends HeapObject;