In {MergeFullStackWith}, we were accidentally looking at the cached
instance in the current {cache_state_} instead of the state passed as
{source}. This could lead to missing reload of the instance after a
conditional branch.
R=thibaudm@chromium.org
Bug: chromium:1179182
Change-Id: Ida3c06491f7973a183c43745159abbf6aa8a058b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704081
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72864}
Change the frame fill to unconditionally subtract already pushed
registers from register count. This ensures that the decision to add a
push loop is dependent on the _remaining_ registers, not the _total_
registers.
Bug: v8:11420
Change-Id: Ide763654e66f0a8c827a00fca1b4a77be2052f76
Fixed: chromium:1179595
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704672
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72863}
For external uncached strings (also called "Small External Strings")
with cacheable resources, we can cache its resource's data at the
string's creation time. This allows us to safely read the data from the
background as we wouldn't trigger a data() callback.
For more information regarding the investigation and possible proposals
see
https://docs.google.com/document/d/101eAQqFpBPWFGNJicxtdlwYShJkTOUsEuxkVVeu5Hrk/edit?usp=sharing
Bug: v8:7790, v8:11463
Change-Id: I6164092b01a6ccb525a9516f476e066b35fb1f96
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2685177
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72862}
This reverts commit 76a2ab06a1.
Reason for revert: A few issues, e.g.
https://logs.chromium.org/logs/v8/buildbucket/cr-buildbucket.appspot.com/8854931126653780144/+/u/Check__flakes_/ArrayWithCowElements
Original change's description:
> [compiler] Direct heap reads for JSArrayRef
>
> There are two aspects to the non-JSObject parts of JSArrayRef:
>
> - JSArrayRef::length. Relevant only in two spots, 1. when reading
> (immutable) array boilerplates and 2. for GetOwnCowElement.
>
> - JSArrayRef::GetOwnCowElement. May read into a copy-on-write backing
> store. Relies on the invariant that cow backing stores are immutable.
>
> This CL renames the length accessor to length_unsafe to make the
> danger explicit at callsites.
>
> For GetOwnCowElement the refactor is slightly larger, since we now
> need to read into the backing store while keeping full control of
> object reads (e.g. JSArray::length and JSArray::elements_kind). We
> make all reads explicit at the call site by requiring that elements,
> elements kind, and length are passed in as arguments to
> GetOwnCowElement. Inside GetOwnCowElement, consistency between these
> is *not* guaranteed due to concurrency. At runtime, consistency *is*
> guaranteed through the reference-equality check on the elements seen
> during compilation. The actual elements read is implemented in
> ConcurrentLookupIterator::GetOwnCowElement.
>
> Bug: v8:7790
> Change-Id: I9aa169ce4f2b1e2bfe1e9232007669eb7654a995
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2695403
> Commit-Queue: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#72834}
Bug: v8:7790, chromium:1180012
Change-Id: I50e72380c544b2b78e1e3dc87a8249281b710912
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704666
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72860}
The StackGuard in the sparkplug prologue builtin on x64 was called with
the frame in a weird state; in particular, the baseline code PC wasn't
on the stack. This could lead to oddities like the baseline code getting
collected by a GC during the interrupt.
Now we push the baseline code return address and set up a proper frame
for the interrupt.
Bug: v8:11420
Change-Id: I03b4c2f2d204ad413c5f54f9e8fc28182edf9085
Fixed: chromium:1177219
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704658
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72858}
This is a reland of
https://chromium-review.googlesource.com/c/v8/v8/+/2688058
This CL is part of a series that adds the C++ implementation of
SwissNameDictionary, a deterministic property backing store based on
Swiss Tables.
This CL adds the initialization code, factory functions and a
canonical SwissNameDictionary plus all helpers required for that.
Bug: v8:11388
Change-Id: I9cf66a3fa755288f7730f55abfb6e6cea82f6b03
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2703653
Commit-Queue: Frank Emrich <emrich@google.com>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72857}
This reverts commit f731e13f00.
Reason for revert: perf regressions, chromium:1179757
Original change's description:
> Remove 'length' field from ScopeInfo
>
> ScopeInfo has a vestigial 'length' field from when it used to be a
> FixedArray. This change removes that field, which saves some memory.
>
> More specifically:
>
> - Make ScopeInfo inherit from HeapObject, not FixedArrayBase which
> supplied the 'length' field.
> - Privatize the FixedArray-style functions that provide access to
> ScopeInfo fields by index, and move them from scope-info-inl.h to
> scope-info.cc. Those functions are still used pretty heavily during
> initialization (ScopeInfo::Create, etc.), but at least we can avoid
> presenting them to the rest of the world.
> - Change FactoryBase::NewScopeInfo to allocate the updated object shape.
> It maintains the existing behavior of filling the newly-allocated
> object with undefined, even though that's not a valid ScopeInfo and
> further initialization is required.
> - Move part of AccessorAssembler::ScriptContextTableLookup into a new
> Torque macro, because it used to rely on casting ScopeInfo to
> FixedArrayBase.
> - In V8HeapExplorer::AddEntry, don't claim that ScopeInfo objects are
> arrays. I think it makes more sense to list them under "(system)" in
> the dev tools, like most other V8 internal types.
>
> Bug: v8:8952
> Change-Id: I8278e3a90027d4409f0d268da0fe7080754c6b8c
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2601880
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Peter Marshall <petermarshall@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
> Reviewed-by: Mythri Alle <mythria@chromium.org>
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Cr-Commit-Position: refs/heads/master@{#72830}
Bug: v8:8952
Change-Id: I00a69da79e5ac6aaae4436a41ce773ae014cc775
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2706086
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Seth Brenith <seth.brenith@microsoft.com>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72855}
Rolling v8/build: 99c7b26..d9000c9
Rolling v8/third_party/aemu-linux-x64: X81JiseHcDpE_0A4yjc6A232-BwI6vJSzYlXeAnpNwcC..SesU5Vh9_5Zm4yE0Qtuyv2VQ8UhCuhRMW3IkFgT7n0sC
Rolling v8/third_party/depot_tools: 5e37f6d..f362f6f
Rolling v8/tools/clang: 9990265..6cf138c
Rolling v8/tools/luci-go: git_revision:77944aa535e42e29faadf6cfa81aee252807d468..git_revision:fd10124659e991321df2f8a5d3749687b54ceb0a
Rolling v8/tools/luci-go: git_revision:77944aa535e42e29faadf6cfa81aee252807d468..git_revision:fd10124659e991321df2f8a5d3749687b54ceb0a
Rolling v8/tools/luci-go: git_revision:77944aa535e42e29faadf6cfa81aee252807d468..git_revision:fd10124659e991321df2f8a5d3749687b54ceb0a
TBR=v8-waterfall-sheriff@grotations.appspotmail.com
Change-Id: Id952af26eb7019ac2603e8f8ad94e93e1fe47300
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2706521
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#72852}
We can use UseScratchRegisterScope instead of requiring a
TempSimd128Register in the instruction-selector. This reduces register
pressure a little bit (when combined with unique register constraints).
Drive-by cleanup of some variable names in code-generator, s/tmp2/tmp/
when there is only 1 tmp.
Bug: v8:11384
Change-Id: I00a365624cbabeaeeaf78d1d08f0eb284c7e44ac
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2705523
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72851}
The atomic pause would not report any marked bytes which in turn would
mean that the used bytes counter would stay at 0 for testing GCs that
always use atomic marking.
Bug: chromium:1056170
Change-Id: Ie35d9b3bc88766c4ef56271f05d944f4835ba431
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704662
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72850}
My recent change https://crrev.com/c/v8/v8/+/2698057 changed the size of
bytecode for most functions, and attempted to update other heuristic
values to match. However, it caused V8 to be slightly too eager to
perform on-stack replacement in JetStream 2's gaussian-blur test case,
so that the function got compiled separately for each of two nested
loops rather than just once for the outer loop. This is the smallest
change that restores the previous behavior in that benchmark.
Bug: chromium:1179571
Change-Id: I03e98d6bff7355b775c1fdaf495e7444e7c6f095
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704882
Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#72849}
- Remove unused type inference paths which will be replaced
with more explicit structs.
- Removes the tagged pointer from CTypeInfo since the embedder
will perform the type check for API objects.
Bug: chromium:1052746
Change-Id: I47a5f5ae35b06845b01b68cb089c67f76a7fb05e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2686685
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72848}
This avoids a lot of code repetition for generating the call descriptor
and the actual call for a runtime stub.
R=thibaudm@chromium.org
Bug: v8:11384, v8:11453
Change-Id: Ice5d5513534ee854b50e323d788fa5cb2630e627
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2702336
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72840}
... for creating a FixedArray.
Calling builtins is generally cheaper than calling into the runtime, and
this also saves us a int->Smi conversion.
The builtin still has the "Wasm" prefix, since it's only used in wasm
for now.
R=thibaudm@chromium.org
Bug: v8:11453
Change-Id: I0c5b6b71ae1b07608f51e685014a0e8dc0034111
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698674
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72839}
Modify the cctests for the inlined JS-to-Wasm calls to use the
%ObserveNode intrinsic, to verify that the JSCall node is actually
inlined . This requires a small refactoring of the %ObserveNode
implementation.
Bug: v8:11092
Change-Id: I01727143fec64c6c11c58b1b664f51daae5bfdb6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2677811
Commit-Queue: Paolo Severini <paolosev@microsoft.com>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72838}
... to reflect reversed parameters.
Change-Id: I3a709eb27f0c64f60ca3f5cb5b5fd7a1b8d5faa0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2702337
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72837}
Eager evaluation in DevTools console relies on the builtins side
effect attribution.
Setters on Date object should be marked as no side effects if called
on the temporary object.
This bug was uncovered after considering screenshot from a tweet [1].
[1] https://twitter.com/shuding_/status/1362132984376160256
Change-Id: Iedc0e29e2bdab719304e2f0a0435845f24eaaadc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2703459
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72835}
There are two aspects to the non-JSObject parts of JSArrayRef:
- JSArrayRef::length. Relevant only in two spots, 1. when reading
(immutable) array boilerplates and 2. for GetOwnCowElement.
- JSArrayRef::GetOwnCowElement. May read into a copy-on-write backing
store. Relies on the invariant that cow backing stores are immutable.
This CL renames the length accessor to length_unsafe to make the
danger explicit at callsites.
For GetOwnCowElement the refactor is slightly larger, since we now
need to read into the backing store while keeping full control of
object reads (e.g. JSArray::length and JSArray::elements_kind). We
make all reads explicit at the call site by requiring that elements,
elements kind, and length are passed in as arguments to
GetOwnCowElement. Inside GetOwnCowElement, consistency between these
is *not* guaranteed due to concurrency. At runtime, consistency *is*
guaranteed through the reference-equality check on the elements seen
during compilation. The actual elements read is implemented in
ConcurrentLookupIterator::GetOwnCowElement.
Bug: v8:7790
Change-Id: I9aa169ce4f2b1e2bfe1e9232007669eb7654a995
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2695403
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72834}
Process global accessors for total physical size and used size are
needed for blink. These are implemented via an allocation observer that
atomically updates static counters.
The public api only provides getters for the counters. An internal class
is in charge of updating the counters as needed. A similar split is also
applied to IsAnyIncrementalOrConcurrentMarking().
Drive-by: ProcessHeap is merged into cppgc::internal::WriteBarrier.
Bug: chromium:1056170
Change-Id: Iaedebd1ac9d49238ce6bdd52ffa5d1ef4d28203d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2695394
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72832}
IsMarking returns true as long as a marker exists. That means IsMarking
is true during weak processing as well.
ActiveScriptWrappableManager in blink uses a weak callback that updates
a HeapVector and thus can trigger a write barrier during the atomic
pause (which violates a DCHECK in the barrier).
Bug: chromium:1056170
Change-Id: I6304b38da9751320836a5e2407e8c7d529367bad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2700676
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72831}
ScopeInfo has a vestigial 'length' field from when it used to be a
FixedArray. This change removes that field, which saves some memory.
More specifically:
- Make ScopeInfo inherit from HeapObject, not FixedArrayBase which
supplied the 'length' field.
- Privatize the FixedArray-style functions that provide access to
ScopeInfo fields by index, and move them from scope-info-inl.h to
scope-info.cc. Those functions are still used pretty heavily during
initialization (ScopeInfo::Create, etc.), but at least we can avoid
presenting them to the rest of the world.
- Change FactoryBase::NewScopeInfo to allocate the updated object shape.
It maintains the existing behavior of filling the newly-allocated
object with undefined, even though that's not a valid ScopeInfo and
further initialization is required.
- Move part of AccessorAssembler::ScriptContextTableLookup into a new
Torque macro, because it used to rely on casting ScopeInfo to
FixedArrayBase.
- In V8HeapExplorer::AddEntry, don't claim that ScopeInfo objects are
arrays. I think it makes more sense to list them under "(system)" in
the dev tools, like most other V8 internal types.
Bug: v8:8952
Change-Id: I8278e3a90027d4409f0d268da0fe7080754c6b8c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2601880
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#72830}
This reverts commit 2f8a7561cb.
Reason for revert: Speculative revert, lots of segfaults on Arm:
https://ci.chromium.org/p/v8/builders/ci/V8%20Arm%20-%20debug/17781
Original change's description:
> [dict-proto] C++ implementation of SwissNameDictionary, pt. 3
>
> This CL is part of a series that adds the C++ implementation of
> SwissNameDictionary, a deterministic property backing store based on
> Swiss Tables.
>
> This CL adds the initialization code, factory functions and a
> canonical SwissNameDictionary plus all helpers required for that.
>
> Bug: v8:11388
> Change-Id: I6bb92740afefc7d05433cfa62023e6da5e8213c7
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2688058
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Commit-Queue: Frank Emrich <emrich@google.com>
> Cr-Commit-Position: refs/heads/master@{#72824}
Bug: v8:11388
Change-Id: Ia5dae584b0fb452b12c5d64ee63ffa418c83f91b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698758
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72829}
After https://crrev.com/c/2695401, CachRegs needed to be defined
on PPC to overwrite the default value "0xff".
The default value was causing the following failure on some tests:
```
#
# Fatal error in ../../src/wasm/baseline/liftoff-register.h, line 160
# Debug check failed: 0 != kLiftoffAssemblerGpCacheRegs & reg.bit()
(0 vs. 0).
```
Values are taken from `src/execution/ppc/frame-constants-ppc.h`.
Change-Id: Idfc1d0fdc20d0b5aabc25e5b5809a93073a2dc3d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698930
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#72827}
This missing include was undetected because trace_perf.cc is only
built if the checkout_google_benchmark custom gclient variable is
defined.
Bug: none
Change-Id: If2016edad4df382f14903593ea18066f7759c4d5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698387
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Chris Mumford <cmumford@google.com>
Cr-Commit-Position: refs/heads/master@{#72825}
This CL is part of a series that adds the C++ implementation of
SwissNameDictionary, a deterministic property backing store based on
Swiss Tables.
This CL adds the initialization code, factory functions and a
canonical SwissNameDictionary plus all helpers required for that.
Bug: v8:11388
Change-Id: I6bb92740afefc7d05433cfa62023e6da5e8213c7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2688058
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Frank Emrich <emrich@google.com>
Cr-Commit-Position: refs/heads/master@{#72824}
This is a reland of cf93071c91
Original change's description:
> [interpreter] Short Star bytecode
>
> Design doc:
> https://docs.google.com/document/d/1g_NExMT78II_KnIYNa9MvyPYIj23qAiFUEsyemY5KRk/edit
>
> This change adds 16 new interpreter opcodes, kStar0 through kStar15, so
> that we can use a single byte to represent the common operation of
> storing to a low-numbered register. This generally reduces the quantity
> of bytecode generated on web sites by 8-9%.
>
> In order to not degrade speed, a couple of other changes are required:
>
> The existing lookahead logic to check for Star after certain other
> bytecode handlers is updated to check for these new short Star codes
> instead. Furthermore, that lookahead logic is updated to contain its own
> copy of the dispatch jump rather than merging control flow with the
> lookahead-failed case, to improve branch prediction.
>
> A bunch of constants use bytecode size in bytes as a proxy for the size
> or complexity of a function, and are adjusted downward proportionally to
> the decrease in generated bytecode size.
>
> Other small drive-by fix: update generate-bytecode-expectations to emit
> \n instead of \r\n on Windows.
>
> Change-Id: I6307c2b0f5794a3a1088bb0fb94f6e1615441ed5
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2641180
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Cr-Commit-Position: refs/heads/master@{#72773}
Change-Id: I1afb670c25694498b3989de615858f984a8c7f6f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698057
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72821}
Previously, ephemerons without a base_object_payload have been
filtered. base_object_payload is currently used to differentiate
between GarbageCollected and just traceable objects, so we need to
pass on the empty descriptor.
Bug: chromium:1056170
Change-Id: I9cba53295779ec74dce2822b7bf83f477bc3241f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2700039
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72820}
Move the CompileWithBaseline interface to the Compiler class, as
CompileBaseline, which will do the additional work of pre-compiling
to bytecode, ensuring there is a feedback vector, and setting the
code on the function closure.
As a drive-by, fix v8_enable_trace_unoptimized to have a blank default
value, so that v8_enable_trace_ignition/v8_enable_trace_baseline_exec
can set it.
Bug: v8:11420, v8:11429
Change-Id: If715161de71f7d9300f3fdcbb50cc678b1fcdfdf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2697352
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72819}
Port af3c5307f0
Original Commit Message:
This threads through a JumpMode kJump/kReturn to JumpCodeObject so we
can use a return instruction to jump instead by first pushing the jump
target and then using a return instruction.
R=verwaest@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N
Change-Id: I354329238d00503a234556f25adccd920d26d320
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2700036
Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#72816}
