1. 30 Aug, 2017 1 commit
    • Benedikt Meurer's avatar
      [cleanup] Unify enum cache handling. · 562663d5
      Benedikt Meurer authored
      Introduce a proper empty_descriptor_array, which has the proper layout
      (length is 2 and the two fields are set properly). Also add a special
      EnumCache class and a matching empty_enum_cache. The contract now is
      that we only need to check the EnumLength on the map to know whether we
      are allowed to use the enum cache. This greatly simplifies the handling
      of the enum cache (and also the descriptor arrays), especially for the
      future work on optimizing keyed access via the enum cache indices.
      
      Bug: v8:6702
      Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
      Change-Id: I5ef517a3041163cd65ef003f691139ea52233e83
      Reviewed-on: https://chromium-review.googlesource.com/641030
      Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
      Reviewed-by: 's avatarBenedikt Meurer <bmeurer@chromium.org>
      Reviewed-by: 's avatarMichael Lippautz <mlippautz@chromium.org>
      Reviewed-by: 's avatarCamillo Bruni <cbruni@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#47697}
      562663d5
  2. 28 Jul, 2017 1 commit
    • Jakob Kummerow's avatar
      Refactor TransitionArray access · e567dd3a
      Jakob Kummerow authored
      in preparation for caching StoreIC-Transition handlers in there.
      This CL should not change behavior or performance.
      
      The TransitionArray class no longer serves a dual purpose; it is now
      simply the data structure serving that role. Further, it now supports
      storing transitioning handlers in its "target" slot, which in turn have
      a WeakCell pointing to the transition target (but this functionality
      is not being used yet).
      
      The interface for accessing a map's transitions, previously implemented
      as a set of static functions, is now handled by the TransitionsAccessor
      class. It distinguishes the following internal states:
      - kPrototypeInfo: map is a prototype map, will never cache any transitions.
      - kUninitialized: map can cache transitions, but doesn't have any.
      - kWeakCell: map caches a single transition, stored inline. Formerly known
                   as "IsSimpleTransition".
      - kFullTransitionArray: map uses a TransitionArray to store transitions.
      - kTuple3Handler, kFixedArrayHandler: to be used in the future for caching
                                            transitioning handlers.
      
      Change-Id: If2aa68390981f96f317b958445a6e0b935c2a14e
      Reviewed-on: https://chromium-review.googlesource.com/550118Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
      Reviewed-by: 's avatarBenedikt Meurer <bmeurer@chromium.org>
      Reviewed-by: 's avatarIgor Sheludko <ishell@chromium.org>
      Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#46981}
      e567dd3a
  3. 29 Jun, 2017 1 commit
  4. 28 Apr, 2017 1 commit
  5. 24 Mar, 2017 1 commit