The optimized code for TestSetWithCustomIterator holds a weak reference to the map
for the entries object. If this is collected by the GC then the optimized code deopts
which causes the test to fail. To prevent this, hold onto an entires object to keep
it's map alive.
Change-Id: I5796e74fc1d7c5061bf8c98f7a82fe582d6be76a
Reviewed-on: https://chromium-review.googlesource.com/c/1357043
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57978}
Previously, the following call sequence was always made when creating resulting
subsetted TypedArray:
1) TFJ TypedArrayPrototypeSubArray
2) TFS TypedArrayConstructor
3) TFS CreateTypedArray
This CL, skips #2 and goes straight to #3 when the default constructor (builtin) is
safe to use (IsPrototypeTypedArrayPrototype and
!IsTypedArraySpeciesProtectorCellInvalid).
Local TypedArrays/SubarrayNoSpecies microbenchmark shows ~35-40% improvement...
BEFORE
TypedArrays-SubarrayNoSpecies(Score): 1033530
TypedArrays-SubarrayNoSpecies(Score): 1018490
TypedArrays-SubarrayNoSpecies(Score): 1037030
AFTER
TypedArrays-SubarrayNoSpecies(Score): 1439030
TypedArrays-SubarrayNoSpecies(Score): 1417540
TypedArrays-SubarrayNoSpecies(Score): 1405980
Bug: v8:7161
Change-Id: I356dace36570aa161ffe208a57a80e46714121a2
Reviewed-on: https://chromium-review.googlesource.com/c/1331154
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57458}
We didn't check if the input typed array was neutered before going to
the fast path, so we hit a CHECK in this case.
Fix this by just checking if the buffer was neutered and then going to
the 'check iterator' case if it is. This will cause a TypeError via
IterableToList, which was the same as the behavior before the
optmization was landed.
Bug: chromium:899519
Change-Id: I09e6389ea2ab1e3bef01e616721b48a9b66c1b2a
Reviewed-on: https://chromium-review.googlesource.com/c/1307422
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57137}
Currently, because the source float_64_array has an iterator, it hits
the code in the "check_iterator" section of TypedArrayFrom which calls
IterableToList. This builds a temporary PACKED_ELEMENTS array (and boxes
all of the numeric values as HeapNumbers), then uses this as the source
array.
This patch checks if the source array is a TypedArray, and if the iterator
is the built-in one (where we know the iterator's behaviour). If both are
true then it bypasses the creation of this temporary array and uses the
original TypedArray as the source.
This allows it to take advantage of the existing fast code for copying one
typed array to another.
R=hablich@chromium.org, petermarshall@chromium.org
Bug: chromium:884671
Change-Id: I19a944c9d6d5d07699c7dc3ad7196fc871200b62
Reviewed-on: https://chromium-review.googlesource.com/c/1297312
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57022}
This CL allows ExtractFixedArray to know if the JSArray has only Smi
elements. In that case ExtractFixedArray will always skip write barriers
when copying the Smi-only backing store. In the case that the copying
is not possibly conflicting with the concurrent marker, CopyElements will
efficiently use memcpy for further performance.
This improves the performance of ExtractFastJSArray and CloneFastJSArray.
As a result, performance of copying Smi arrays by slice() and spreading is
improved, except for spreading Smi holey arrays.
Bug: v8:7980
Change-Id: Ie39f8abf3b5039cc12a8ca7ece81352375e0e9da
Reviewed-on: https://chromium-review.googlesource.com/c/1286340
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Hai Dang <dhai@google.com>
Cr-Commit-Position: refs/heads/master@{#56989}
Previously StringToList use the length of the original string, which is
not the right value: we expect the length of the new array to be the
number of characters (codepoints).
Bug: v8:7980
Change-Id: I2efca5715323c4399cb45c53871ae349207f3458
Reviewed-on: https://chromium-review.googlesource.com/c/1297320
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56944}
AllocateJSArray always allocates in new space, so we bailout of the fast
path for strings if the new array does not fit in new space.
Bug found by ClusterFuzz. Regression test added.
This also switches to the BranchIf pattern to avoid materialize a bool.
Bug: chromium:895860, v8:7980
Change-Id: Ic7c41268c394ac2796b7694252390ab50fd74838
Reviewed-on: https://chromium-review.googlesource.com/c/1286337
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Hai Dang <dhai@google.com>
Cr-Commit-Position: refs/heads/master@{#56759}
This CL extends IterableToListWithSymbolLookup with fast paths
for spreading keys/values iterators of JSMap, and values iterator
of JSSet (which is also the iterator of Set.prototype.keys() and
Set.prototype[Symbol.iterator]()). The fast paths are only taken
if the target still has original iteration behavior.
For iterators it is also required that the iterator is not
partially consumed. After spreading, to be spec-compliant, the
iterator is exhausted. Tests are added.
Bug: v8:7980
Change-Id: Ida74e5ecbbc5ba5488d13a40f2c4bda14c781cbf
Reviewed-on: https://chromium-review.googlesource.com/c/1276632
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Hai Dang <dhai@google.com>
Cr-Commit-Position: refs/heads/master@{#56716}
The MapIterator protector protects the original iteration behaviors of
Map.prototype.keys(), Map.prototype.values(), and Set.prototype.entries().
It does not protect the original iteration behavior of
Map.prototype[Symbol.iterator](). The protector is invalidated when:
* The 'next' property is set on an object where the property holder is the
%MapIteratorPrototype% (e.g. because the object is that very prototype).
* The 'Symbol.iterator' property is set on an object where the property
holder is the %IteratorPrototype%. Note that this also invalidates the
SetIterator protector (see below).
The SetIterator protector protects the original iteration behavior of
Set.prototype.keys(), Set.prototype.values(), Set.prototype.entries(),
and Set.prototype[Symbol.iterator](). The protector is invalidated when:
* The 'next' property is set on an object where the property holder is the
%SetIteratorPrototype% (e.g. because the object is that very prototype).
* The 'Symbol.iterator' property is set on an object where the property
holder is the %SetPrototype% OR %IteratorPrototype%. This means that
setting Symbol.iterator on a MapIterator object can also invalidate the
SetIterator protector, and vice versa, setting Symbol.iterator on a
SetIterator object can also invalidate the MapIterator. This is an over-
approximation for the sake of simplicity.
Bug: v8:7980
Change-Id: I54ad6e4c7f19ccc27d7001f6c4b6c8d6ea4ee871
Reviewed-on: https://chromium-review.googlesource.com/c/1273102
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Hai Dang <dhai@google.com>
Cr-Commit-Position: refs/heads/master@{#56530}
This is a reland of ef2a19a211.
Use AllocateJSArray to avoid allocating an empty fixed array.
Original change's description:
> Add fast path for spreading primitive strings.
>
> This improves the performance on primitive strings of
> IterableToListWithSymbolLookup, which implements the
> CreateArrayFromIterable bytecode. The fast path is only
> taken if the string iterator protector is valid (that is,
> String.prototype[Symbol.iterator] and
> String.prototype[Symbol.iterator]().next are untouched).
>
> This brings spreading of primitive strings closer to the
> performance of the string iterator optimizations.
> (see https://docs.google.com/document/d/13z1fvRVpe_oEroplXEEX0a3WK94fhXorHjcOMsDmR-8/).
>
> Bug: chromium:881273, v8:7980
> Change-Id: Ic8d8619da2f2afcc9346203613a844f62653fd7a
> Reviewed-on: https://chromium-review.googlesource.com/1243110
> Commit-Queue: Hai Dang <dhai@google.com>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#56329}
Bug: chromium:881273, v8:7980
Change-Id: I746c57ddfc300e1032057b5125bc824adf5c2cd3
Reviewed-on: https://chromium-review.googlesource.com/c/1267497
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56438}
For each intrinsic/runtime function we define in runtime.h, an inline
version is automatically declared. We only ever use 24 of the inline
functions. Even though we don't call the other ones, macro magic means
they still take up space by existing in various arrays and tables like
kIntrinsicFunctions. They also create code in switch statements.
Some drive-by cleanups:
- Remove the switch in NameForRuntimeId() and just use the table of
runtime functions to lookup the name directly.
- Remove tests for IsFunction, ClassOf and StringAdd intrinsics as
they are the last users of the inline versions of these.
- Remove the MaxSmi inline version as it is only used in tests.
Saves 64 KiB binary size.
Change-Id: I4c870ddacd2655ffcffa97d93200ed8f853752f5
Reviewed-on: https://chromium-review.googlesource.com/c/1261939
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56412}
The protector is useful for follow-up optimizations on string iterator.
Tests are also added.
Change-Id: I416037c742628c4d4d3b878d0df727a9ae7162f7
Reviewed-on: https://chromium-review.googlesource.com/1251122
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Hai Dang <dhai@google.com>
Cr-Commit-Position: refs/heads/master@{#56315}
This is a reland of 1c48d52bb1.
It turned out that IterableToList doesn't always behave according to
the ES operation with the same name. Specifically, it allows holey arrays
to take its fast path, which produces an output array with holes where
actually "undefined" elements should appear.
This CL changes the version of IterableToList that is used for spreads
(IterableToListWithSymbolLookup) such that holey arrays take the slow path.
It also includes tests for such situations.
Original change's description:
> [interpreter] Add bytecode for leading array spreads.
>
> This CL improves the performance of creating [...a, b] or [...a].
> If the array literal has a leading spread, this CL emits the bytecode
> [CreateArrayFromIterable] to create the literal. CreateArrayFromIterable
> is implemented by [IterableToListDefault] builtin to create the initial
> array for the leading spread. IterableToListDefault has a fast path to
> clone efficiently if the spread is an actual array.
>
> The bytecode generated is now shorter. Bytecode generation is refactored
> into to BuildCreateArrayLiteral, which allows VisitCallSuper to benefit
> from this optimization also.
> For now, turbofan also lowers the bytecode to the builtin.
>
> The idiomatic use of [...a] to clone the array a now performs better
> than a simple for-loop, but still does not match the performance of slice.
>
> Bug: v8:7980
>
> Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
> Change-Id: Ibde659c82d3c7aa1b1777a3d2f6426ac8cc15e35
> Reviewed-on: https://chromium-review.googlesource.com/1181024
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Commit-Queue: Georg Neis <neis@chromium.org>
> Commit-Queue: Hai Dang <dhai@google.com>
> Cr-Commit-Position: refs/heads/master@{#55520}
Bug: v8:7980
Change-Id: I0b5603a12d2b588327658bf0a9b214bd0f22e237
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/1201882
Commit-Queue: Hai Dang <dhai@google.com>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55639}
Refactor the ArrayIteratorPrototypeNext CSA builtin to handle the
JSArray element access in a dedicated helper macro, very similar
to how it's done for JSTypedArray's. Also add support for dictionary
elements to this helper macro using the existing dictionary access
logic in the CodeStubAssembler.
This improves the readability of the builtin significantly and the
performance of iterating arrays with dictionary elements goes up by
a factor of ~3.5x.
Bug: v8:8015, v8:8070
Change-Id: Ibfee760ea1e4bc0fffb42b232fb1d097b706bd1f
Reviewed-on: https://chromium-review.googlesource.com/1183305
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55283}
The original implementation of 'testAsync' in mjsunit.js required to
put the call to '%AbortJS' into an 'eval' statement. The reason is that
this call requires the flag --allow-natives-syntax to be set, but the
flag is not set in all mjsunit tests. With the use of 'eval'
compilation errors can be avoided.
The problem with this approach was that the fuzzer started to produce
test cases which include the line 'eval("%AbortJS(message)");', and
this line crashes intentionally. Different to the line
'%Abort(message)', however, the 'eval' statement cannot be filtered
so easily in the fuzzer. Therefore I pulled the implementation of
'testAsync' into a separate file to avoid the 'eval'.
Additional changes: I use '===' now instead of 'deepEquals' in
AsyncAssertion.equals because 'deepEquals' is not available outside
mjsunit.js. Using '===' seems more appropriate anyways because for
all tests but one it is sufficient, and it is more precise than
deepEquals.
R=gsathya@chromium.org
Bug: chromium:774841
Change-Id: I47270aa63ff5a1d6aa76a771f9276eaaf579c5ac
Reviewed-on: https://chromium-review.googlesource.com/1156598
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54833}
The CSA fast path returned null for Proxy.prototype whereas runtime GetProperty
returned undefined. The CL fixes this discrepancy by returning undefined for
both cases and this makes it complaint with the spec.
Change-Id: I35b75c09dc99e8fd629671e30eacd2cabea8c1d4
Reviewed-on: https://chromium-review.googlesource.com/1145438
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Chandan Reddy <chandanreddy@google.com>
Cr-Commit-Position: refs/heads/master@{#54745}
This CL fixes a bug where a fast-path was used on non-extensible
objects.
R=jgruber@chromium.org
Bug: chromium:865264,chromium:865285
Change-Id: Ie14c95b383a65576799c71576a5c0f9f8e1c29ca
Reviewed-on: https://chromium-review.googlesource.com/1142766
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Simon Zünd <szuend@google.com>
Cr-Commit-Position: refs/heads/master@{#54539}
This CL moves Array.p.fill from JavaScript to a C++ builtin. It has
a generic slow-path and fast-paths implemented via ElementsAccessor in
elements.cc.
R=cbruni@chromium.org
Bug: v8:7624
Change-Id: I8820e1195d2cd9b41c254058923ad9875aab067c
Reviewed-on: https://chromium-review.googlesource.com/1131130
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54522}
When storing an indexed property in a typed array, it's necessary to
convert the value to a Number (or to a Bigint) before performing the
bounds check, per
https://tc39.github.io/ecma262/#sec-integerindexedelementset.
This CL adds appropriate type conversions in
Object::SetPropertyInternal (which technically is reached after the
bounds check has already occurred, but this isn't observable yet ---
In the future, once OOB accesses on TypedArrays actually throw, this
will need to be refactored again), and in StoreFastElementStub, and
ElementsTransitionAndStoreStub (via CSA::EmitElementStore).
The change was not necessary in TurboFan, as
JSNativeContextSpecialization already performs the value conversion
before the boundscheck.
The result is some fixed test262 tests, and some new test coverage
for this behaviour in mjsunit.
BUG=v8:7896, v8:5327
R=neis@chromium.org, jkummerow@chromium.org, gsathya@chromium.org
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ibe6bec24c72ef6a4fd3e77d5bcafa03737f4c5e3
Reviewed-on: https://chromium-review.googlesource.com/1117372
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54096}
This is a reland of a229e12101
The original commit broke a layout test in Blink. The test in Blink
has been marked to be skipped and will be updated once this patch
lands.
See https://chromium-review.googlesource.com/c/chromium/src/+/1097455
Original change's description:
> [builtins] set DataView.length to 1
>
> Refs: https://github.com/tc39/ecma262/pull/1131
> Test: test262/built-ins/DataView/length
> Bug: v8:7816
> Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
> Change-Id: I66a06734bd32cd2043a8d04728b2185f6093bd69
> Reviewed-on: https://chromium-review.googlesource.com/1094980
> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53649}
Bug: v8:7816
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: If63be80523a68d3a2b515fe1d55a243d2dd2a9b2
Reviewed-on: https://chromium-review.googlesource.com/1097568
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53682}
This CL uses the new function pointers and generic features of Torque
to improve the performance of TypedArray.p.sort.
Instead of one Load/Store builtin that dispatches at runtime based on
the element kind, there are now many small builtins (one for each
element kind). The sorting algorithm then uses function pointers to
those small builtins, which get set once.
Changes in the relevant benchmarks:
Benchmark Original (JS) Current This CL
IntTypes 83.9 202.3 240.7
BigIntTypes 32.1 47.2 53.3
FloatTypes 99.3 109.3 129.3
Bug: v8:7382
Change-Id: I8684410524d546615b19f6edcbfdc615068196aa
Reviewed-on: https://chromium-review.googlesource.com/1070069
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53322}
Without this change, we could disable slow paths required when symbols
such as toStringTag are present on a receiver, but accessors or
interceptors are not (added in 31800120cc)
This change modifies this behaviour to not unset the previously set bit
if these forced slow path conditions are not met.
BUG=v8:7706
R=bmeurer@chromium.org
Change-Id: Id7bceb0e749da52e2dbcde0a310a865a89f24066
Reviewed-on: https://chromium-review.googlesource.com/1034210
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Cr-Commit-Position: refs/heads/master@{#52874}
This is a reland of 5728b3fbc5
Original change's description:
> [builtins] Separate species protectors for Array, TypedArray, Promise
>
> Previously, there was one species protector for Array, TypedArray and
> Promise. This CL splits the protector in three separate ones. This means
> that invalidating one of them does not have negative performance
> implications for the other ones.
>
> Bug: chromium:835347, v8:7340
> Change-Id: Id84aa0071f17096192965264eb60ddadd1e8e73f
> Reviewed-on: https://chromium-review.googlesource.com/1023408
> Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#52733}
Bug: chromium:835347, v8:7340
Change-Id: I0c0188a0723e206ddb362834bcf872b23cd7666d
Reviewed-on: https://chromium-review.googlesource.com/1023811
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52742}
This reverts commit 5728b3fbc5.
Reason for revert: Breaks noi18n build
Original change's description:
> [builtins] Separate species protectors for Array, TypedArray, Promise
>
> Previously, there was one species protector for Array, TypedArray and
> Promise. This CL splits the protector in three separate ones. This means
> that invalidating one of them does not have negative performance
> implications for the other ones.
>
> Bug: chromium:835347, v8:7340
> Change-Id: Id84aa0071f17096192965264eb60ddadd1e8e73f
> Reviewed-on: https://chromium-review.googlesource.com/1023408
> Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#52733}
TBR=sigurds@chromium.org,bmeurer@chromium.org
Change-Id: Ied8b436e7991c759eb3b98702c142aa127a7e63c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:835347, v8:7340
Reviewed-on: https://chromium-review.googlesource.com/1024151
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52736}
Previously, there was one species protector for Array, TypedArray and
Promise. This CL splits the protector in three separate ones. This means
that invalidating one of them does not have negative performance
implications for the other ones.
Bug: chromium:835347, v8:7340
Change-Id: Id84aa0071f17096192965264eb60ddadd1e8e73f
Reviewed-on: https://chromium-review.googlesource.com/1023408
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52733}
This CL adds a test for each typed element kind where the array to sort
consists of some max/min/zero elements.
When providing a custom compare function, the upcoming torque version
of TypedArray.p.sort needs to convert array elements to Number/BigInt
and back. The tests check the edge cases for that conversion.
R=jgruber@chromium.org
Bug: v8:7382
Change-Id: Ia85ca343f62ece208acdeb1595e94f17ce12b713
Reviewed-on: https://chromium-review.googlesource.com/1021080
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52710}
Also add a new fast-path for String.fromCodePoint.
R=neis@chromium.org
Bug: v8:7570, v8:7340
Change-Id: I6cd6e6fc98943588ecd646f24fcda043d4033ab0
Reviewed-on: https://chromium-review.googlesource.com/978244
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52183}
In Promise.all we used to allocate a fresh closure plus a fresh context
for each individual element, which is quite a lot of overhead, especially
since this could be shared in a single context for all elements. The only
bit of information that is needed for each resolve element closure is the
index under which to store the resulting value. With this change we move
this index to the "identity hash" field of the JSFunction, which doesn't
care about the concrete value anyways, as long as it's not zero (the "no
hash" sentinel), and share the rest of the fields in a single outer
context for all resolve element closures.
This limits the maximum number of elements for Promise.all to 2^21 for
now, but that should be fine. Shall we ever see the need for more than
this, we can add machinery to overflow to separate context for indices
larger than 2^21.
This significantly reduces the overhead due to Promise.all on the
parallel-async-es2017-native test, with execution time dropping from
around 148ms to 133ms, so overall a steady 10% improvement on this
benchmark.
Bug: v8:7253
Change-Id: I1092da771c4919f3db7129d2b0a244fc26a7b144
Reviewed-on: https://chromium-review.googlesource.com/973283
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52134}
- Add a new bytecode for the ToString operation, replacing the old
intrinsic call (currently does not collect type feedback).
- Add a new AST node to represent TemplateLiterals, and avoid
generating unnecessary ToString operations in some simple cases.
- Use a single feedback slot for each string addition, because the
type feedback should always be the same for each addition
This seems to produce a very slight improvement on JSTests benchmarks
and bench-ruben.js from v8:7415, and it's possible that type feedback
for the ToString bytecode could provide more opportunities to eliminate
the runtime call in TurboFan.
Doesn't touch tagged templates
[esnext] fix OOB read in ASTPrinter::VisistTemplateLiteral
Fixes an error where TemplateLiteral printing in --print-ast
would try to read an element beyond the length of a vector.
BUG=v8:7415, chromium:820596
R=adamk@chromium.org, gsathya@chromum.org, rmcilroy@chromium.org, ishell@chromium.org, bmeurer@chromium.org
Change-Id: Ie56894f73a6445550a5f95f42160c4e29ab1da42
Reviewed-on: https://chromium-review.googlesource.com/958408
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Cr-Commit-Position: refs/heads/master@{#51933}
When Promise.all is called with something which violates the iterable
contract, the resulting error should be provided by returning a rejected
promise, not by throwing.
Bug: v8:7553
Change-Id: I2769b09b49c9b80ef380419489416fc0fabff51b
Reviewed-on: https://chromium-review.googlesource.com/959599
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51902}
This reverts commit 0802e2b262.
Reason for revert: For reverting https://crrev.com/c/945408
Original change's description:
> [esnext] fix OOB read in ASTPrinter::VisistTemplateLiteral
>
> Fixes an error where TemplateLiteral printing in --print-ast
> would try to read an element beyond the length of a vector.
>
> BUG=v8:7415, chromium:820596
> R=adamk@chromium.org, gsathya@chromium.org
>
> Change-Id: Idf9e0da8c165ee62bc1a348a91c2ed5ed798404a
> Reviewed-on: https://chromium-review.googlesource.com/957883
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Commit-Queue: Caitlin Potter <caitp@igalia.com>
> Cr-Commit-Position: refs/heads/master@{#51857}
TBR=adamk@chromium.org,gsathya@chromium.org,caitp@igalia.com
Change-Id: I5fe950cd823ae350b5f6c09227a62aef9dc2a008
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7415, chromium:820596
Reviewed-on: https://chromium-review.googlesource.com/957724
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51861}
Fixes an error where TemplateLiteral printing in --print-ast
would try to read an element beyond the length of a vector.
BUG=v8:7415, chromium:820596
R=adamk@chromium.org, gsathya@chromium.org
Change-Id: Idf9e0da8c165ee62bc1a348a91c2ed5ed798404a
Reviewed-on: https://chromium-review.googlesource.com/957883
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Cr-Commit-Position: refs/heads/master@{#51857}
... and use it in the implementation of array literal spreads,
replacing calls to %AppendElement.
Array spreads in destructuring will be taken care of in a separate CL.
Bug: v8:5940, v8:7446
Change-Id: Idec52398902a7fd3c1244852cf73246f142404f0
Reviewed-on: https://chromium-review.googlesource.com/915364
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51709}
Without --harmony-function-tostring, anything other than a JSFunction
or JSBoundFunction throw when Function.prototype.toString is called on
them. But with the toString revision, anything callable allows toString
(and for non-Functions returns the good old "function () { [native code] }"
string).
Bug: v8:7484
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I3540e213a40992151761b59666fe36e0510da908
Reviewed-on: https://chromium-review.googlesource.com/932825
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51489}
IterableToListCanBeElided checked that the input was always a HeapObject
but this is not true when an iterator symbol is defined on the Number
prototype, meaning Smi and HeapNumber can also be passed in.
Added a regression test for the crash and some correctness tests for
smi and double input to TA.from.
Also factored out the tests in typedarray-from.js that modify global
state e.g. protector cells, so that one iteration of the top level
loop does not interfere with the next.
Bug: chromium:814643
Change-Id: I364d11f011faf8370446f905a35a945d47e4477f
Reviewed-on: https://chromium-review.googlesource.com/930962
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51461}
Until now lookbehind assertions have been quantifiable in non-unicode regexps.
This seems to be an oversight in the spec.
R=jgruber@chromium.org
Bug: v8:7462
Change-Id: Iad0db441089c7510dd2c42a861db92c05545ce1e
Reviewed-on: https://chromium-review.googlesource.com/926102
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51392}
Factor out IterableToList into a helper stub to save space. There are
two callers now, TypedArrayFrom and ConstructByIterable, and it is
~2.5kb so we save space by doing this.
Increase test coverage to cover more of the branching in CSA.
This is doesn't follow the control flow in the spec exactly - see the
big code comment for an explanation.
Change-Id: Ief39e93c4202cb7bf0e28a39dc6aa81b8b9c59d2
Reviewed-on: https://chromium-review.googlesource.com/908755
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51377}
Previously, eval caching was only disabled if the root eval body code
contained a tagged template. Per discussion on
https://github.com/tc39/ecma262/pull/890, this is incorrect.
This change tracks if eval caching is allowed during parsing, and
uses this information to decide to insert
new entries into the cache, or not.
This change also removes the TemplateObject feedback kind, as it's no
longer needed (behaves the same as Literal feedback).
BUG=v8:3230, v8:2891
R=littledan@chromium.org, yangguo@chromium.org, bmeurer@chromium.org,
rmcilroy@chromium.org
Change-Id: Ib75abe9159baf4d8ad10f8de99d2152714bd0094
Reviewed-on: https://chromium-review.googlesource.com/916945
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51373}
instance_class_name takes up space unnecessarily, and %_ClassOf and
class_name implement [[Class]] which isn't part of ES2015+ anymore.
Bug:
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I3a73f732ad83a616817fde9992f4e4d584638fa8
Reviewed-on: https://chromium-review.googlesource.com/776683
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51309}
- Remove JS implementation of TA.p.filter
- Reimplement TA.p.filter as CSA
- This CL makes TA.p.filter 3x faster in microbenchmark
- Fix a spec bug: throw if buffer is detached while executing callback
Bug: v8:5929
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I2e14b6001d354ca6659cf65fff4ead2942ddc9ff
Reviewed-on: https://chromium-review.googlesource.com/912989
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51288}
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: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51261}
Implements the change outlined in https://github.com/tc39/ecma262/pull/890,
which has been ratified and pulled into the specification. In particular,
template callsite objects are no longer kept in a global, eternal Map, but
are instead associated with their callsite, which can be collected. This
prevents a memory leak incurred by TaggedTemplate calls.
Changes, summarized:
- Remove the TemplateMap and TemplateMapShape objects, instead caching
template objects in the feedback vector.
- Remove the `hash` member of TemplateObjectDescriptor, and the Equals
method (used by TemplateMap)
- Add a new FeedbackSlotKind (kTemplateObject), which behaves similarly
to FeedbackSlotKind::kLiteral, but prevents eval caching. This ensures
that a new feedback vector is always created for eval() containing tagged
templates, even when the CompilationCache is used.
- GetTemplateObject bytecode now takes a feedback index, and only calls
into the runtime if the feedback is Smi::kZero (uninitialized).
BUG=v8:3230, v8:2891
R=littledan@chromium.org, yangguo@chromium.org, bmeurer@chromium.org,
rmcilroy@chromium.org
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I7827bc148d3d93e2b056ebf63dd624da196ad423
Reviewed-on: https://chromium-review.googlesource.com/624564
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51248}
This removes the Javascript version of Array.from in js/array.js and
adds a CodeStubAssembler version in src/builtins/builtins-array-gen.cc.
Also modify IteratorBuiltinsAssembler to allow querying the existence
of the iterator method without calling it so we can fall back to the
array-like behavior.
BUG=v8:1956
Change-Id: Ibfb3cef002d72d70bd30b4de676fd22becde006c
Reviewed-on: https://chromium-review.googlesource.com/887066
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51208}
This is the last piece of the TypedArray constructors that was still
written in JS.
Bug: v8:7102
Change-Id: I7c4dc867b09408caa4eec2873ea7185b6c61a525
Reviewed-on: https://chromium-review.googlesource.com/888751
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51122}
- Introduce new helper IsFastJSArrayWithNoCustomIteration.
- Consolidates all entry array checks...
- Is a fast array (defers to BranchIfFastJSArray)
- No possibility that the Array's iteration protocol has been tampered with
- Introduce new BoolT constant helpers Int32TrueConstant and Int32FalseConstant.
Bug: chromium:804176, chromium:804188
Change-Id: I6b08396484682dc680b431ea564a7a28eeab8108
Reviewed-on: https://chromium-review.googlesource.com/883065
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50867}
- Add Map, WeakMap, Set, and WeakSet initial prototype maps to native context.
- Set and WeakSet constructors check whether prototype map differs from initial
before choosing the fast path.
Bug: chromium:798026
Change-Id: I5f9cc2463f89e17f06a66b565c625fce133d01fb
Reviewed-on: https://chromium-review.googlesource.com/853698
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50691}
This is needed to easily port the constructor dispatcher to CSA.
Bug: v8:7102
Change-Id: I9672416495940ca12088a2980a9ecc61364aef9d
Reviewed-on: https://chromium-review.googlesource.com/785630
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50671}
It was shipped in Chrome 63.
Bug: v8:5855
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Icc00b8300622d1c7b5662be8ac5e425b9781f666
Reviewed-on: https://chromium-review.googlesource.com/858381
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50558}
https://github.com/tc39/ecma262/pull/988 gained concensus during the
september 2017 TC39 meetings. This moves the load of the "next" method
to the very beginning of the iteration protocol, rather than during
each iteration step.
This impacts:
- yield*
- for-of loops
- spread arguments
- array spreads
In the v8 implementation, this also affects async iteration versions of
these things (the sole exception being the Async-From-Sync iterator,
which requires a few more changes to work with this, likely done in a
followup patch).
This change introduces a new AST node, ResolvedProperty, which can be used
as a callee by Call nodes to produce the same bytecode as Property calls,
without observably re-loading the property. This is used in several
AST-desugarings involving the iteration protocol.
BUG=v8:6861, v8:5699
R=rmcilroy@chromium.orgTBR=neis@chromium.org, adamk@chromium.org
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I9685db6e85315ba8a2df87a4537c2bf491e1e35b
Reviewed-on: https://chromium-review.googlesource.com/857593
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50518}
This reverts commit bf4cc9ee15.
Reason for revert: Breaks windows with msvc and linux with gcc
https://build.chromium.org/p/client.v8/builders/V8%20Win64%20-%20msvc/builds/841https://build.chromium.org/p/client.v8/builders/V8%20Linux%20gcc%204.8/builds/17265
Original change's description:
> [esnext] load `iterator.next` only once at beginning of iteration
>
> https://github.com/tc39/ecma262/pull/988 gained concensus during the
> september 2017 TC39 meetings. This moves the load of the "next" method
> to the very beginning of the iteration protocol, rather than during
> each iteration step.
>
> This impacts:
>
> - yield*
> - for-of loops
> - spread arguments
> - array spreads
>
> In the v8 implementation, this also affects async iteration versions of
> these things (the sole exception being the Async-From-Sync iterator,
> which requires a few more changes to work with this, likely done in a
> followup patch).
>
> This change introduces a new AST node, ResolvedProperty, which can be used
> as a callee by Call nodes to produce the same bytecode as Property calls,
> without observably re-loading the property. This is used in several
> AST-desugarings involving the iteration protocol.
>
> BUG=v8:6861, v8:5699
> R=rmcilroy@chromium.org, neis@chromium.org, adamk@chromium.org
>
> Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
> Change-Id: Ib81106a0182687fc5efea0bc32302ad06376773b
> Reviewed-on: https://chromium-review.googlesource.com/687997
> Commit-Queue: Caitlin Potter <caitp@igalia.com>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#50452}
TBR=rmcilroy@chromium.org,adamk@chromium.org,neis@chromium.org,caitp@igalia.com,caitp@chromium.org
Change-Id: I1797c0d596dfd6850d6f0f505f591a7a990dd1f1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6861, v8:5699
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/857616
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50454}
https://github.com/tc39/ecma262/pull/988 gained concensus during the
september 2017 TC39 meetings. This moves the load of the "next" method
to the very beginning of the iteration protocol, rather than during
each iteration step.
This impacts:
- yield*
- for-of loops
- spread arguments
- array spreads
In the v8 implementation, this also affects async iteration versions of
these things (the sole exception being the Async-From-Sync iterator,
which requires a few more changes to work with this, likely done in a
followup patch).
This change introduces a new AST node, ResolvedProperty, which can be used
as a callee by Call nodes to produce the same bytecode as Property calls,
without observably re-loading the property. This is used in several
AST-desugarings involving the iteration protocol.
BUG=v8:6861, v8:5699
R=rmcilroy@chromium.org, neis@chromium.org, adamk@chromium.org
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ib81106a0182687fc5efea0bc32302ad06376773b
Reviewed-on: https://chromium-review.googlesource.com/687997
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50452}
- Removes JS implementation and InnerArrayFind/InnerArrayFindIndex
- Adds TFJ, with TFS for slow continuation path
Some quick benchmarks show ~2x improvement for unoptimized code
and up to 16% improvement against optimized code (diminishes with
larger arrays as iterating dominates).
https://github.com/peterwmwong/v8-perf/blob/master/array-find-findIndex/README.md
Bug: chromium:791045, v8:1956, v8:5049, v8:7165
Change-Id: Ie16252ed495bbd91fe548b16d5ef6764de791a50
Reviewed-on: https://chromium-review.googlesource.com/804704
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49851}
This test expects certain functions to be optimized, which does not
happen if we force array objects onto the slow path.
Bug: v8:7122
Change-Id: I716954fff564f1c4f0782b3452557ec89a3b4307
Reviewed-on: https://chromium-review.googlesource.com/796860
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49736}
It was shipped in Chrome 62.
Bug: v8:5546, v8:4829
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I3ac318639f1f7483d4d4f4fe5606387a856be98a
Reviewed-on: https://chromium-review.googlesource.com/777940
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49687}
Pull most JSTypedArray source arguments onto the fast path.
Same source & target elements-kinds simply call memmove. Other
combinations call directly into C and reuse ElementsAccessor logic.
Only overlapping source & target args with differing elements-kinds
remain on the slow runtime path.
Bug: v8:7123, v8:3590
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I80284b61478b0e3266b8f16bde8a56bd90f080b0
Reviewed-on: https://chromium-review.googlesource.com/788857
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49643}
This adds a fast path that avoids the runtime transition for JSArray
source arguments with {packed,holey} {smi,double} elements kinds.
The fast path currently calls straight into C and copies there using
elements accessor logic.
Local tests show a 4x speedup when copying from 1-element JSArrays.
As the source array becomes larger, the time spent copying elements
begins to dominate.
Bug: v8:3590
Change-Id: I05ebe54d7b255d0a76ad46ac11ce7cfd516b8ac8
Reviewed-on: https://chromium-review.googlesource.com/789010
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49634}
This CL also includes fixes for CF issues found while the previous
reland was active.
Bug: v8:5799, chromium:783902, chromium:783926, chromium:783822
Change-Id: I1f7d9b037d90838469c45f5d72771a77444c662e
Reviewed-on: https://chromium-review.googlesource.com/764067
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49457}
Both of these features were shipped in Chrome 62.
Bug: v8:4545, v8:6172
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: Ie00dcbeded7517a15696d4a78fcfbbf162919923
Reviewed-on: https://chromium-review.googlesource.com/775601
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49453}
It's been on by default since Chrome 61.
Bug: v8:4806
Change-Id: I748d9008d29997667458649d7bf4999e15ff8615
Reviewed-on: https://chromium-review.googlesource.com/737416
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48943}
- Fix a wrong type casting triggered when a given array's length is zero
- Add a regression test case
Bug: chromium:777182, chromium:768775
Change-Id: I615b73e9d7bad657c872c96c7a204efe355d8289
Reviewed-on: https://chromium-review.googlesource.com/732865
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48821}
- Throw a TypeError exception if a given target argument is not a typed
array before converting a given offset argument to an integer.
- Add a testcase
Bug: chromium:768775
Change-Id: Id132a0f154fcf930f211922fcbef6c66f9d6f285
Reviewed-on: https://chromium-review.googlesource.com/728120
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48736}
Replace GetElement and SetElement to Get and Set, and use CopyElements,
which reduces 4x-13x overheads.
Bug: chromium:768775
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I58534b30c2035195c5f4b8f2c04e7c459bdbebaa
Reviewed-on: https://chromium-review.googlesource.com/720661
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48723}
Previously, Function("++f`...`) would not throw an exception until the
created function was called. Now, it throws an early ReferenceError.
This change matches the behaviour in JavaScriptCore and SpiderMonkey.
Ordinary calls such as Function("++f()") are still thrown at runtime,
also compatible with JavaScriptCore and SpiderMonkey.
BUG=v8:4480, v8:6910
R=marja@chromium.org, littledan@chromium.org
Change-Id: If31c6d360a0464744eff5d8dd377ebff184ae00e
Reviewed-on: https://chromium-review.googlesource.com/712794
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48553}
- Expose fast paths for RegExpPrototypeMatchBody/RegExpPrototypeSearchBody as TFS builtins
- Add StringPrototypeMatch and StringPrototypeSearch TFJ builtins
- Add StringMatchSearchAssembler to ensure same search/match behavior
- Remove functionality from string.js
A quick benchmark shows gains of 20-30% for unoptimized code and 0-20% for optimized code.
https://github.com/peterwmwong/v8-perf/blob/master/string-search-match/README.md
Bug: v8:5049
Change-Id: I0fffee6e94e62ecae049c9e5798da52d67ae1823
Reviewed-on: https://chromium-review.googlesource.com/707824
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48452}
This brings V8's behavior in line with both the spec and with
other engines.
This also fixes the (now-incorrect) DCHECK in BytecodeGenerator relating
to the delete operator's application to a VariableProxy.
Bug: v8:6697, v8:6721
Change-Id: I413c02af235b0bb652eb4c5d5c971e2cf80e0906
Reviewed-on: https://chromium-review.googlesource.com/703894
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48346}
When setting a typed array from an array like object, the
length of the source can only be converted to a unit32 if
it is not too large.
Bug: v8:6704, chromium:761654
Change-Id: I8f89aa348093d8bd4d54aa16d6b5f255d3cb7adc
Reviewed-on: https://chromium-review.googlesource.com/648976
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47798}
This flag allows invalid escape sequences in tagged templates, which is
a stage-4 TC39 proposal shipping in other browsers.
Bug: v8:5546
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I3e7c374c9b547f62d5976f76a7208d05fe9decf8
Reviewed-on: https://chromium-review.googlesource.com/581885
Commit-Queue: Kevin Gibbons <bakkot@gmail.com>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47584}
(source_length - 1) can be overflowed, and cause OOB access when source_length
is zero. Thus, just do not operate setting if source_length is zero when
starting TypedArraySetFromOverlapping.
Bug: v8:6704
Change-Id: I5da60590c9a197eae96625a12720f6818b8c598a
Reviewed-on: https://chromium-review.googlesource.com/620452
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47430}
