1. 14 Feb, 2018 8 commits
  2. 13 Feb, 2018 22 commits
    • Junliang Yan's avatar
      Reland "PPC/s390: [turbofan] Masking/poisoning in codegen (optimized code, x64)" · 66ff72a7
      Junliang Yan authored
      This is a reland of cee362af.
      
      Original change's description:
      > PPC/s390: [turbofan] Masking/poisoning in codegen (optimized code, x64)
      > 
      > Port 8f489e73
      > 
      > Original Commit Message:
      > 
      >     This introduces masking of loads with speculation bit during code generation.
      >     At the moment, this is done only for x64 optimized code, under the
      >     --branch-load-poisoning flag.
      > 
      >     Overview of changes:
      >     - new register configuration configuration with one register reserved for
      >       the speculation poison/mask (kSpeculationPoisonRegister).
      >     - in codegen, we introduce an update to the poison register at the starts
      >       of all successors of branches (and deopts) that are marked as safety
      >       branches (deopts).
      >     - in memory optimizer, we lower all field and element loads to PoisonedLoads.
      >     - poisoned loads are then masked in codegen with the poison register.
      >       * only integer loads are masked at the moment.
      > 
      > R=mvstanton@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com
      > BUG=
      > LOG=N
      > 
      > Change-Id: I7decc16bbadf87a8c8b178278eb79a9b783f79e1
      > Reviewed-on: https://chromium-review.googlesource.com/916744
      > Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
      > Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
      > Cr-Commit-Position: refs/heads/master@{#51275}
      
      Change-Id: Id22416487b05bef06c4cfdae35811a22f21cd0a0
      Reviewed-on: https://chromium-review.googlesource.com/916865Reviewed-by: 's avatarJoran Siu <joransiu@ca.ibm.com>
      Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
      Cr-Commit-Position: refs/heads/master@{#51278}
      66ff72a7
    • Camillo Bruni's avatar
      [errors] Use FATAL macro where possible · 52b3b491
      Camillo Bruni authored
      FATAL(...) avoid creating literal strings for line number in release
      mode.
      
      Bug: v8:7310
      Change-Id: I6a3e329adce36b0efcc240068f6a241d1cca4b6f
      Reviewed-on: https://chromium-review.googlesource.com/915066Reviewed-by: 's avatarBenedikt Meurer <bmeurer@chromium.org>
      Reviewed-by: 's avatarAndreas Haas <ahaas@chromium.org>
      Commit-Queue: Camillo Bruni <cbruni@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51277}
      52b3b491
    • Junliang Yan's avatar
      Revert "PPC/s390: [turbofan] Masking/poisoning in codegen (optimized code, x64)" · 4513ee2e
      Junliang Yan authored
      This reverts commit cee362af.
      
      Reason for revert: forget to upload latest version
      
      Original change's description:
      > PPC/s390: [turbofan] Masking/poisoning in codegen (optimized code, x64)
      > 
      > Port 8f489e73
      > 
      > Original Commit Message:
      > 
      >     This introduces masking of loads with speculation bit during code generation.
      >     At the moment, this is done only for x64 optimized code, under the
      >     --branch-load-poisoning flag.
      > 
      >     Overview of changes:
      >     - new register configuration configuration with one register reserved for
      >       the speculation poison/mask (kSpeculationPoisonRegister).
      >     - in codegen, we introduce an update to the poison register at the starts
      >       of all successors of branches (and deopts) that are marked as safety
      >       branches (deopts).
      >     - in memory optimizer, we lower all field and element loads to PoisonedLoads.
      >     - poisoned loads are then masked in codegen with the poison register.
      >       * only integer loads are masked at the moment.
      > 
      > R=​mvstanton@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com
      > BUG=
      > LOG=N
      > 
      > Change-Id: I7decc16bbadf87a8c8b178278eb79a9b783f79e1
      > Reviewed-on: https://chromium-review.googlesource.com/916744
      > Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
      > Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
      > Cr-Commit-Position: refs/heads/master@{#51275}
      
      TBR=mvstanton@chromium.org,michael_dawson@ca.ibm.com,jyan@ca.ibm.com,joransiu@ca.ibm.com
      
      Change-Id: I7e56cdcd99b3c6004803b4502ec1054e89c1e212
      No-Presubmit: true
      No-Tree-Checks: true
      No-Try: true
      Reviewed-on: https://chromium-review.googlesource.com/916864Reviewed-by: 's avatarJunliang Yan <jyan@ca.ibm.com>
      Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
      Cr-Commit-Position: refs/heads/master@{#51276}
      4513ee2e
    • Junliang Yan's avatar
      PPC/s390: [turbofan] Masking/poisoning in codegen (optimized code, x64) · cee362af
      Junliang Yan authored
      Port 8f489e73
      
      Original Commit Message:
      
          This introduces masking of loads with speculation bit during code generation.
          At the moment, this is done only for x64 optimized code, under the
          --branch-load-poisoning flag.
      
          Overview of changes:
          - new register configuration configuration with one register reserved for
            the speculation poison/mask (kSpeculationPoisonRegister).
          - in codegen, we introduce an update to the poison register at the starts
            of all successors of branches (and deopts) that are marked as safety
            branches (deopts).
          - in memory optimizer, we lower all field and element loads to PoisonedLoads.
          - poisoned loads are then masked in codegen with the poison register.
            * only integer loads are masked at the moment.
      
      R=mvstanton@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com
      BUG=
      LOG=N
      
      Change-Id: I7decc16bbadf87a8c8b178278eb79a9b783f79e1
      Reviewed-on: https://chromium-review.googlesource.com/916744Reviewed-by: 's avatarJoran Siu <joransiu@ca.ibm.com>
      Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
      Cr-Commit-Position: refs/heads/master@{#51275}
      cee362af
    • Andreas Haas's avatar
      [heap] Make setting use_tasks_ explicit · 1e9504ba
      Andreas Haas authored
      At the moment the flag is set too late, it is possible that the GC still
      tries to post tasks in Isolate::Deinit when the isolate is already
      disconnected from the platform, see the referenced bug.
      
      R=ulan@chromium.org
      
      Bug: chromium:810739
      Change-Id: Ibcd226cb44cc903f2a46e7cccf682b3938c9d408
      Reviewed-on: https://chromium-review.googlesource.com/915942Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
      Commit-Queue: Andreas Haas <ahaas@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51274}
      1e9504ba
    • Junliang Yan's avatar
      PPC/s390: [Ignition] [TurboFan] Generate speculation poison in code generator. · abac06aa
      Junliang Yan authored
      Port a021b6c4
      
      Original Commit Message:
      
          Moves generation of speculation poison to be based on the PC target vs the
          actual PC being executed. The speculation poison is generated in the prologue
          of the generated code if CompilationInfo::kGenerateSpeculationPoison is set.
          The result is stored in a known register, which can then be read using the
          SpeculationPoison machine node.
      
          Currently we need to ensure the SpeculationPoison node is scheduled right after
          the code prologue so that the poison register doesn't get clobbered. This is
          currently not verified, however it's only use is in RawMachineAssembler where
          it is manually scheduled early.
      
          The Ignition bytecode handlers are updated to use this speculation poison
          rather than one generated by comparing the target bytecode.
      
      R=rmcilroy@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com
      BUG=chromium:798964
      LOG=N
      
      Change-Id: I4b9a1b0865b6164171cf83f0e45c36c69ac08a18
      Reviewed-on: https://chromium-review.googlesource.com/914848Reviewed-by: 's avatarJoran Siu <joransiu@ca.ibm.com>
      Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
      Cr-Commit-Position: refs/heads/master@{#51273}
      abac06aa
    • Mike Stanton's avatar
      [turbofan] Masking/poisoning in codegen (optimized code, x64) · 8f489e73
      Mike Stanton authored
      This introduces masking of loads with speculation bit during code generation.
      At the moment, this is done only for x64 optimized code, under the
      --branch-load-poisoning flag.
      
      Overview of changes:
      - new register configuration configuration with one register reserved for
        the speculation poison/mask (kSpeculationPoisonRegister).
      - in codegen, we introduce an update to the poison register at the starts
        of all successors of branches (and deopts) that are marked as safety
        branches (deopts).
      - in memory optimizer, we lower all field and element loads to PoisonedLoads.
      - poisoned loads are then masked in codegen with the poison register.
        * only integer loads are masked at the moment.
      
      Bug: chromium:798964
      Change-Id: Ie51fdbde578fc289dff029794f3cfe8eaf33e1ef
      Reviewed-on: https://chromium-review.googlesource.com/901625
      Commit-Queue: Michael Stanton <mvstanton@chromium.org>
      Reviewed-by: 's avatarBenedikt Meurer <bmeurer@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51272}
      8f489e73
    • Michael Starzinger's avatar
      [assembler] Fix compilation for non-simulator builds. · c74af694
      Michael Starzinger authored
      R=mvstanton@chromium.org
      
      No-Presubmit: true
      No-Tree-Checks: true
      No-Try: true
      Change-Id: I6175fd4c4e2999667ba04c89df5cd3f2b380ae0a
      Reviewed-on: https://chromium-review.googlesource.com/916263Reviewed-by: 's avatarMichael Stanton <mvstanton@chromium.org>
      Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51271}
      c74af694
    • Michael Starzinger's avatar
      [turbofan] Better checking of code start register. · 5586ecfc
      Michael Starzinger authored
      This decouples the checking of the {kJavaScriptCallCodeStartRegister}
      from the deoptimization checks. We now rely more heavily on the above
      register and should check its validity more broadly. Note that there
      also is a bug fix for the ARM port contained in this change.
      
      R=mvstanton@chromium.org
      
      Change-Id: I27d8b72cb2b36a85dae4bbbf35e4dbcf150eac01
      Reviewed-on: https://chromium-review.googlesource.com/916242
      Commit-Queue: Michael Stanton <mvstanton@chromium.org>
      Reviewed-by: 's avatarMichael Stanton <mvstanton@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51270}
      5586ecfc
    • Michael Starzinger's avatar
      [assembler] Make {RelocInfo} independent of the Isolate. · a7402558
      Michael Starzinger authored
      Now that instruction cache flushing is process-wide and no longer bound
      to a specific {Isolate}, we can also make setters on the {RelocInfo}
      structure equally independent of the {Isolate} and remove the respective
      parameter everywhere.
      
      R=ahaas@chromium.org
      
      Change-Id: I7b21f6f79d0d6cf73424019b9e808c3ec76de08e
      Reviewed-on: https://chromium-review.googlesource.com/915922Reviewed-by: 's avatarAndreas Haas <ahaas@chromium.org>
      Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51269}
      a7402558
    • sreten.kovacevic's avatar
      [Liftoff] Refactor conditional instructions · 1e89fed0
      sreten.kovacevic authored
      Change prototypes of conditional jump and set instructions,
      change their implementation accordingly and port these instructions
      to MIPS.
      
      Bug: v8:6600
      Change-Id: I8e2c9c874f2fde9a1c1b5a34eaa9e72475e69bc5
      Reviewed-on: https://chromium-review.googlesource.com/913252Reviewed-by: 's avatarIvica Bogosavljevic <ivica.bogosavljevic@mips.com>
      Reviewed-by: 's avatarClemens Hammacher <clemensh@chromium.org>
      Commit-Queue: Sreten Kovacevic <sreten.kovacevic@mips.com>
      Cr-Commit-Position: refs/heads/master@{#51268}
      1e89fed0
    • Peter Marshall's avatar
      [promise] Construct promises through API in C++, rather than CSA. · 5bc39360
      Peter Marshall authored
      We don't need to pay the cost of going to JS to simply stamp out a
      new object.
      
      Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
      Change-Id: I8942771ff9c19dff1908243fd6d3bd701d3fb5a3
      Reviewed-on: https://chromium-review.googlesource.com/897803
      Commit-Queue: Peter Marshall <petermarshall@chromium.org>
      Reviewed-by: 's avatarMichael Lippautz <mlippautz@chromium.org>
      Reviewed-by: 's avatarGeorg Neis <neis@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51267}
      5bc39360
    • Michael Starzinger's avatar
      [assembler] Remove dead {kNoCodeAgeSequenceLength} constant. · fc04f8ce
      Michael Starzinger authored
      R=clemensh@chromium.org
      
      Change-Id: Ife4b31e5484314e3e9d51344c446fae4952bbbbf
      Reviewed-on: https://chromium-review.googlesource.com/913616Reviewed-by: 's avatarClemens Hammacher <clemensh@chromium.org>
      Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51266}
      fc04f8ce
    • Sigurd Schneider's avatar
      Reland "[cleanup] Harden the SubString CSA/Runtime implementations." · bb282636
      Sigurd Schneider authored
      This is a reland of 6d5b54df82e27a82811a836dcdbbfe26829f0e6d
      Original change's description:
      > [cleanup] Harden the SubString CSA/Runtime implementations.
      >
      > Remove the self-healing for invalid parameters in the
      > CodeStubAssembler::SubString helper and the %SubString runtime function,
      > which is used as a fallback for the CodeStubAssembler implementation.
      > All call sites must do appropriate parameter validation anyways now that
      > the self-hosted JavaScript builtins using these helpers are gone, and we
      > have proper contracts with the uses.
      >
      > Also remove the context parameter from the CodeStubAssembler::SubString
      > method, which is unnecessary, since this can no longer throw an
      > exception.
      >
      > Bug: v8:5269, v8:6936, v8:7109, v8:7137
      > Change-Id: I19d93bad5f41faa0561c4561a48f78fcba99a549
      > Reviewed-on: https://chromium-review.googlesource.com/795720
      > Reviewed-by: Jakob Gruber <jgruber@chromium.org>
      > Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
      > Cr-Commit-Position: refs/heads/master@{#49702}
      
      Bug: v8:5269, v8:6936, v8:7109, v8:7137
      Change-Id: I5e84998a2dd3990d7981505b401ffc770e0b7ac5
      Reviewed-on: https://chromium-review.googlesource.com/913130Reviewed-by: 's avatarBenedikt Meurer <bmeurer@chromium.org>
      Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51265}
      bb282636
    • Georg Neis's avatar
      [ic] Remove impossible cases from FeedbackNexus::ConfigureUninitialized(). · 58807a6f
      Georg Neis authored
      Change-Id: I835e6c7b5520b5ab5ad796e25a197e5b43cb9e58
      Reviewed-on: https://chromium-review.googlesource.com/913569
      Commit-Queue: Georg Neis <neis@chromium.org>
      Reviewed-by: 's avatarMichael Stanton <mvstanton@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51264}
      58807a6f
    • Clemens Hammacher's avatar
      [Liftoff] Add f64 support · b61b715c
      Clemens Hammacher authored
      This CL adds support for f64.const, f64.add, f64.sub and f64.mul.
      
      R=ahaas@chromium.org
      
      Bug: v8:6600
      Change-Id: I7374ede800db83303c8fa647a183fdda53a151cd
      Reviewed-on: https://chromium-review.googlesource.com/913613Reviewed-by: 's avatarAndreas Haas <ahaas@chromium.org>
      Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51263}
      b61b715c
    • v8-autoroll's avatar
      Update V8 DEPS. · da4f9119
      v8-autoroll authored
      Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/792040c..1ae61ca
      
      Rolling v8/buildtools: https://chromium.googlesource.com/chromium/buildtools/+log/2637e7e..a09e064
      
      Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/c60b98d..e7298f3
      
      TBR=machenbach@chromium.org,hablich@chromium.org,sergiyb@chromium.org
      
      Change-Id: I267b24e59799c9e18735851336d7787252dc59e2
      Reviewed-on: https://chromium-review.googlesource.com/915702Reviewed-by: 's avatarv8 autoroll <v8-autoroll@chromium.org>
      Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51262}
      da4f9119
    • Benedikt Meurer's avatar
      [builtins] Optimize PromiseResolveThenableJob for the common case. · 1f8dcc5d
      Benedikt Meurer authored
      The idea here is that in case the `thenable` is a JSPromise and `then`
      is the initial `Promise.prototype.then` method, and the @@species lookup
      chain is intact, we can skip creating the temporary promise and the
      closures (with the shared context), and instead directly call into our
      PerformPromiseThen. This is sound since - given above mentioned
      conditions - our short-cut
      
        PerformPromiseThen(thenable, undefined, undefined, promise_to_resolve)
      
      is not observably different from the actual
      
        resolve, reject = CreateResolvingFunctions(promise_to_resolve)
        result_capability = NewPromiseCapability(%Promise%)
        PerformPromiseThen(thenable, resolve, reject, result_capability)
      
      except through PromiseHooks (and potentially via the async stack
      traces). So we disable the fast-path if either promise hooks are enabled
      or the debugger is active for now.
      
      This improves the performance on the wikipedia benchmark by 20-25% and
      the bluebird-doxbee benchmark by around 20%.
      
      Bug: v8:7253
      Change-Id: I23c92ad365c2b71d65057573f2d8febe2afe00b0
      Reviewed-on: https://chromium-review.googlesource.com/911800
      Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
      Reviewed-by: 's avatarSathya Gunasekaran <gsathya@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51261}
      1f8dcc5d
    • Benedikt Meurer's avatar
      [builtins] Refactor the promise resolution and rejection logic. · c0412961
      Benedikt Meurer authored
      This introduces dedicated builtins
      
        - FulfillPromise,
        - RejectPromise, and
        - ResolvePromise,
      
      which perform the corresponding operations from the language
      specification, and removes the redundant entry points and the
      excessive inlining of these operations into other builtins. We
      also add the same logic on the C++ side, so that we don't need
      to go into JavaScript land when resolving/rejecting from the
      API.
      
      The C++ side has a complete implementation, including full support
      for the debugger and the current PromiseHook machinery. This is to
      avoid constantly crossing the boundary for those cases, and to also
      simplify the CSA side (and soon the TurboFan side), where we only
      do the fast-path and bail out to the runtime for the general handling.
      
      On top of this we introduce %_RejectPromise and %_ResolvePromise,
      which are entry points used by the bytecode and parser desugarings
      for async functions, and also used by the V8 Extras API. Thanks to
      this we can uniformly optimize these in TurboFan, where we have
      corresponding operators JSRejectPromise and JSResolvePromise, which
      currently just call into the builtins, but middle-term can be further
      optimized, i.e. to skip the "then" lookup for JSResolvePromise when
      we know something about the resolution.
      
      In TurboFan we can also already inline the default PromiseCapability
      [[Reject]] and [[Resolve]] functions, although this is not as effective
      as it can be right now, until we have inlining support for the Promise
      constructor (being worked on by petermarshall@ right now) and/or SFI
      based CALL_IC feedback.
      
      Overall this change is meant as a refactoring without significant
      performance impact anywhere; it seems to improve performance of
      simple async functions a bit, but otherwise is neutral.
      
      Bug: v8:7253
      Change-Id: Id0b979f9b2843560e38cd8df4b02627dad4b6d8c
      Reviewed-on: https://chromium-review.googlesource.com/911632Reviewed-by: 's avatarSathya Gunasekaran <gsathya@chromium.org>
      Reviewed-by: 's avatarBenedikt Meurer <bmeurer@chromium.org>
      Reviewed-by: 's avatarGeorg Neis <neis@chromium.org>
      Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51260}
      c0412961
    • Sergiy Byelozyorov's avatar
      Add Peter as an owner of the JSTests benchmark · 07955372
      Sergiy Byelozyorov authored
      This information is useful to know whom to assign bugs to when these tests are
      crashing on our infrastructure.
      
      R=petermarshall@chromium.org
      
      No-Try: true
      Change-Id: Ia165e0236602cae73e144011537d642e3535fa6b
      Reviewed-on: https://chromium-review.googlesource.com/908563
      Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
      Reviewed-by: 's avatarPeter Marshall <petermarshall@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51259}
      07955372
    • Sergiy Byelozyorov's avatar
      Whitespace CL · 5e006978
      Sergiy Byelozyorov authored
      R=sergiyb@google.com
      
      No-Try: true
      Bug: chromium:616879
      Change-Id: If52f419c7447c88313526fceed10e7dd2e89b10c
      Reviewed-on: https://chromium-review.googlesource.com/913948
      Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
      Reviewed-by: 's avatarSergiy Byelozyorov <sergiyb@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51258}
      5e006978
    • Sergiy Byelozyorov's avatar
      Correct try bucket name for internal V8 bots on swarming · d8dc1fc5
      Sergiy Byelozyorov authored
      TBR=machenbach@chromium.org
      
      No-Try: true
      Bug: chromium:616879
      Change-Id: I49d3f12216cdc2d26761e8f82fef18512d8eb6fd
      Reviewed-on: https://chromium-review.googlesource.com/915141
      Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
      Reviewed-by: 's avatarSergiy Byelozyorov <sergiyb@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#51257}
      d8dc1fc5
  3. 12 Feb, 2018 10 commits