This patch adds fast paths for @@replace and @@split that call into
the old, side-effect free (and faster) versions of those builtin
operations when possible (roughly, when the receiver is a RegExp
and the 'exec' method is untampered). Also add some micro-optimizations
that further improve performance.
Taken altogether, this takes us from a ~70% regression on the Octane
RegExp benchmark to a ~9% regression.
The test262.status lines for RegExps has been reorganized to make it
clearer the status of individual tests. More work will likely be
required to increase spec compliance before the --harmony-regexp-exec
flag is shipped; some of that work is happening on the spec side.
BUG=v8:4602
LOG=y
Review URL: https://codereview.chromium.org/1836123002
Cr-Commit-Position: refs/heads/master@{#35118}
The getter RegExp.prototype.source is specified in ES2015 to throw when
called on a non-RegExp instance, such as RegExp.prototype. We had previously
put in a compatibility workaround for all RegExp getters to make them
throw on access specifically with RegExp.prototype as the receiver; however,
we only have evidence that this is needed for properties other than source.
This patch removes the compatibility workaround for get RegExp.prototype.source
and gives it semantics precisely as per the ES2015 specification.
R=adamk
BUG=chromium:581577,v8:4827
LOG=Y
Review URL: https://codereview.chromium.org/1837843002
Cr-Commit-Position: refs/heads/master@{#35086}
String.prototype.match is specified to call out to the current
value of RegExp.prototype[Symbol.match] when passed a string argument,
rather than the original value. This patch updates the RegExp code
to do that.
R=yangguo@chromium.org
BUG=v8:4602
LOG=Y
Review URL: https://codereview.chromium.org/1821773003
Cr-Commit-Position: refs/heads/master@{#35001}
src/js/regexp.js was one of the few files that was left in sloppy
mode. The ES2017 draft specification requires that writes to
lastIndex throw when the property is non-writable, and test262
tests enforce this behavior. This patch puts that file in strict
mode.
BUG=v8:4504
R=yangguo@chromium.org
LOG=Y
Review URL: https://codereview.chromium.org/1776883005
Cr-Commit-Position: refs/heads/master@{#34801}
test262 "negative" test expectations list which exception is thrown. The ES2017
draft specification is very specific about which exception class is thrown
from which path, and V8 works hard to be correct with respect to that spec.
Previously, the test262 test runner would accept any nonzero status code,
such as from a crash, or a FAIL printed out, for a negative test. This
patch makes negative tests check for the right answer using a quick-and-dirty
parsing of the exception printing from d8 to find the exception class.
It invokes d8 in a way to get a status code of 0 from thrown exceptions
so that 'negative' tests aren't actually implemented by negating the output.
Amazingly, this didn't catch any test262 failures, but I verified the extra
checking interactively by changing a negative test to expect a different type
and saw it fail.
BUG=v8:4803
R=machenbach
LOG=Y
Review URL: https://codereview.chromium.org/1766503002
Cr-Commit-Position: refs/heads/master@{#34763}
This patch removes some [PASS, FAIL_OK] lines which consistently pass,
and it declares some tests to be test bugs as appropriate.
R=adamk
Review URL: https://codereview.chromium.org/1784063002
Cr-Commit-Position: refs/heads/master@{#34733}
- Make separate iterator functions for TypedArrays which do a type check
(and in the future should check for detached TypedArrays)
- Share the toString method with Arrays
BUG=v8:4785
R=adamk
LOG=Y
Review URL: https://codereview.chromium.org/1780113002
Cr-Commit-Position: refs/heads/master@{#34698}
This check is guaranteed by the Promise spec and tested by test262
tests. It only has to run for subclasses. This patch adds the check
to the Promise code.
BUG=v8:4633
R=adamk
LOG=Y
Review URL: https://codereview.chromium.org/1780823003
Cr-Commit-Position: refs/heads/master@{#34693}
This is because compiler.cc is awesome. There are cases where we do not
yet have a SharedFunctionInfo that can tell us whether we are compiling
a generator function, we query the FunctionLiteral instead.
R=rmcilroy@chromium.org
BUG=v8:4681
LOG=n
Review URL: https://codereview.chromium.org/1780193002
Cr-Commit-Position: refs/heads/master@{#34677}
This ensures our optimizing compilers as well as the interpreter are
never tasked with compiling the generator-resuming builtin methods. The
corresponding intrinsics for those methods are not supported and it is
not possible to provide a C++ reference implementation for them. We do
this by assigning builtin function ids to them that we can recognize
during the compiler dispatch.
Note that this also affects the interpreter, because methods having a
builtin function id assigned are not interpreted ({function_data} field
is overlapping). If this ever changes we can still do an early check in
the compiler dispatch (similar to the optimizing compilers) easily.
This applies to the following methods:
- Generator.prototype.next (calls Runtime_GeneratorNext).
- Generator.prototype.return (calls Runtime_GeneratorReturn).
- Generator.prototype.throw (calls Runtime_GeneratorThrow).
R=neis@chromium.org
BUG=v8:4681
LOG=n
Review URL: https://codereview.chromium.org/1779123003
Cr-Commit-Position: refs/heads/master@{#34675}
This ensures the interpreter is not tasked with compiling generator
functions. It currently does not support suspending activations at
yielding points, but we still want to be able to activate it for the
rest of JavaScript in the meantime.
R=rmcilroy@chromium.org
BUG=v8:4681
LOG=n
Review URL: https://codereview.chromium.org/1782013002
Cr-Commit-Position: refs/heads/master@{#34672}
The ES2015 specification requires that String.prototype.startsWith,
String.prototype.endsWith and String.prototype.includes use the IsRegExp
internal algorithm to determine whether to throw a TypeError to prevent
a RegExp from being accidentally cast to a String for those methods.
That internal algorithm checks the presence/truthiness of Symbol.match
to make its determination. This patch switches the builtins to use
this correct test, rather than checking for the [[RegExpMatcher]]
internal slot as the builtins previously did.
R=yangguo
Review URL: https://codereview.chromium.org/1762183002
Cr-Commit-Position: refs/heads/master@{#34547}
The ES2016 draft spec defines a sort of fast path for constructing
a TypedArray based on another TypedArray. This patch implements that
alternative path in TypedArray construction. It is verified by
test262 tests, which now pass. This patch also has a slight cleanup
of TypedArray code by using a macro for TypedArray type checks, as
is done for other types.
This patch includes a minor spec violation: In the same-type case, the
spec indicates that the underlying ArrayBuffer should be copied until
the end, and this is fixed up by making the [[ArrayLength]] shorter.
This is observable with the buffer getter. This patch just copies the
used part of the underlying ArrayBuffer.
R=adamk
BUG=v8:4726
LOG=Y
Review URL: https://codereview.chromium.org/1754593003
Cr-Commit-Position: refs/heads/master@{#34443}
Fixes a bug in the constant pool padding calculation.
BUG=v8:4680
LOG=N
Review URL: https://codereview.chromium.org/1749853002
Cr-Commit-Position: refs/heads/master@{#34403}
This patch fixes %TypedArray%.from to follow the ES2016 draft spec
more precisely. Specifically, the input is first converted to an
ArrayLike, and then afterwards, the mapping function is run and the
results written into the TypedArray. This fixes a test262 test.
R=adamk
LOG=Y
BUG=v8:4782
Review URL: https://codereview.chromium.org/1743463004
Cr-Commit-Position: refs/heads/master@{#34373}
Moves skips to explicit fails and groups errors be failure reason. Almost all failures
are due to lack of generator support.
BUG=v8:4680
LOG=N
TBR=oth@chromium.org
Review URL: https://codereview.chromium.org/1740843003
Cr-Commit-Position: refs/heads/master@{#34334}
Reason for revert:
An Intl change that this depends on breaks a bot
Original issue's description:
> Test262 roll, 2016-2-23
>
> R=adamk
>
> Committed: https://crrev.com/34492040fbfb04fead21416245c8696b9847e751
> Cr-Commit-Position: refs/heads/master@{#34312}
TBR=adamk@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1736223002
Cr-Commit-Position: refs/heads/master@{#34313}
There was a bug in for-of loops without newly declared variables: If,
in performing the assignment, an exception were thrown, then
IteratorClose would not be called. The problem was that the assignment
is done as part of assign_each, which happens before the loop is put
back in the state which is recognized to be breaking/throwing/returning
early.
This patch modifies the for-of desugaring by setting the loop state
before, rather than after, evaluating the assign_each portion, which is
responsible for evaluating the assignment in for-of loops which do not
have a declaration.
This patch, together with https://codereview.chromium.org/1728973002 ,
allow all test262 iterator return-related tests to pass.
R=rossberg
BUG=v8:4776
LOG=Y
Review URL: https://codereview.chromium.org/1731773003
Cr-Commit-Position: refs/heads/master@{#34262}
In the for-of desugaring, IteratorClose is a subtle thing to get right.
When return exists, the logic for which exception to throw is as follows:
1. Get the 'return' property and property any exception that might come from
the property read
2. Call return, not yet propagating an exception if it's thrown.
3. If we are closing the iterator due to an exception, propagate that error.
4. If return threw, propagate that error.
5. Check if return's return value was not an object, and throw if so
Previously, we were effectively doing step 5 even if an exception "had already
been thrown" by step 3. Because this took place in a finally block, the exception
"won the race" and was the one propagated to the user. The fix is a simple change
to the desugaring to do step 5 only if step 3 didn't happen.
R=rossberg
BUG=v8:4775
LOG=Y
Review URL: https://codereview.chromium.org/1728973002
Cr-Commit-Position: refs/heads/master@{#34261}
This patch moves for-of closing to staging. There are a couple of
minor semantics bugs remaining in finalization along edge cases, but
we don't know of any stability issues.
BUG=v8:3566
R=rossberg
LOG=Y
Review URL: https://codereview.chromium.org/1725203002
Cr-Commit-Position: refs/heads/master@{#34254}
Apparently, the tarfile Python module spends a lot of time in
grp.getgrid for retrieving a piece information (the name of the
primary group) which we don't need anyway. There is no
proper way to disable these slow calls, but there's a workaround
which relies on the way in which grp (and pwd) is used.
In fact, pwd and grp are imported in this fashion:
try:
import grp, pwd
except ImportError:
grp = pwd = None
and then used with the following pattern [2]:
if grp:
try:
tarinfo.gname = grp.getgrgid(tarinfo.gid)[0]
except KeyError:
pass
By setting grp and pwd to None, thus skipping the calls, I was
able to achieve a 35x speedup on my workstation.
The user and group names are set to test262 when building the tar.
The downside to this approach is that we are relying on an
implementation detail, which is not in the public API.
However, the blamelist shows that the relevant bits of the module
have not been updated since 2003 [3], so we might as well assume
that the workaround will keep working, on cPython 2.x at least.
---
[1] https://hg.python.org/cpython/file/2.7/Lib/tarfile.py#l56
[2] https://hg.python.org/cpython/file/2.7/Lib/tarfile.py#l1933
[3] https://hg.python.org/cpython/rev/f9a5ed092660
BUG=chromium:535160
LOG=N
Review URL: https://codereview.chromium.org/1727773002
Cr-Commit-Position: refs/heads/master@{#34245}
A recent ES2016 draft spec clarification indicates that, if -0 is
passed into Array.prototype.indexOf or Array.prototype.lastIndexOf
as the starting index, and the result is found at index 0, then +0
rather than -0 should be returned. This patch ensures that V8 has
that result, which is consistent with what some other browsers
return. The patch allows a couple test262 tests to pass.
R=adamk
LOG=Y
Review URL: https://codereview.chromium.org/1729653002
Cr-Commit-Position: refs/heads/master@{#34229}
It turns out that some old polyfill library uses
RegExp.prototype.flags as a way of feature testing. It's not clear
how widespread this is. For now, as a minimal workaround, we can
return undefined from getters like RegExp.prototype.global when
the receiver is RegExp.prototype. This patch implements that strategy
but omits a UseCounter to make backports easier.
R=adamk
CC=yangguo@chromium.org
BUG=chromium:581577
LOG=Y
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/1640803003
Cr-Commit-Position: refs/heads/master@{#34201}
The Proxy enumerate trap and Reflect.enumerate are removed from the
ES2016 draft specification. This patch removes the Reflect.enumerate
function, and a follow-on patch will be responsible for the Proxy
trap changes.
R=adamk
LOG=Y
BUG=v8:4768
Review URL: https://codereview.chromium.org/1721453002
Cr-Commit-Position: refs/heads/master@{#34196}
This experimentally implements taring/untaring the test data
for test262 on the v8-side before test isolation and when
running the tests.
It archives on demand only if the tar is outdated compared
to the contained files. This comes with a cost of ~1s extra
to run gyp on linux and ~6s extra on windows. Ninja is
lightning fast afterwards in detecting changes. Also, we
archive only when test_isolation_mode is set and when
the test262_run target is required.
The archiving itself costs ~30s on all platforms. But as the
files will change seldom this shouldn't have a big impact.
Extraction on the test runner side is below 2s on mac and
linux. The speedup is enormous. Around 5 minutes were spent
on download on swarming slaves before, which is now only
a few seconds. So total test time for release (no variants),
e.g. goes from 8 to 3 minutes.
BUG=chromium:535160
LOG=n
Review URL: https://codereview.chromium.org/1713993002
Cr-Commit-Position: refs/heads/master@{#34155}
In ES2015, Date.prototype.toGMTString is simply an alias of
Date.prototype.toUTCString, so it has the same identity as a function and
doesn't have its own name. Firefox has already shipped this behavior.
Previously, we copied JSC behavior by making it a separate function.
This change makes an addition test262 test pass.
BUG=v8:4708
LOG=Y
R=adamk
Review URL: https://codereview.chromium.org/1709373002
Cr-Commit-Position: refs/heads/master@{#34131}
Adds support for ES6 super keyword and performing loads, stores, and
calls to super class members.
Implements SetHomeObject and enables ThisFunctionVariable.
BUG=v8:4280,v8:4682
LOG=N
Review URL: https://codereview.chromium.org/1689573004
Cr-Commit-Position: refs/heads/master@{#33977}
This patch moves Symbol.species support to the "experimental JavaScript
features" flag. While @@species is still a performance hit, it doesn't seem
like it would make the web unusably slow; shipping would still have to
wait on fixing the performance regression, but staging this version should
yield valuable web compatibility information.
R=cbruni
BUG=v8:4093
LOG=Y
Review URL: https://codereview.chromium.org/1678143002
Cr-Commit-Position: refs/heads/master@{#33827}
Adds implementation and tests to support const/let variables in the
interpreter.
BUG=v8:4280,v8:4679
LOG=N
Review URL: https://codereview.chromium.org/1634153002
Cr-Commit-Position: refs/heads/master@{#33819}
Note: This is currently only used by yield*, we still need to support it in
other places (such as for-of loops). It can be used manually of course.
(This CL does not touch the full-codegen implementation of yield* because that
code is already dead. The yield* desugaring already supports return and doesn't
need to be touched.)
BUG=v8:3566
LOG=y
Review URL: https://codereview.chromium.org/1639343005
Cr-Commit-Position: refs/heads/master@{#33744}
Adds implementation and tests for with statement to interprter.
BUG=v8:4280,v8:4684
LOG=N
Review URL: https://codereview.chromium.org/1656863002
Cr-Commit-Position: refs/heads/master@{#33705}
This patch stages the first part of RegExp subclassing--defining
Symbol.{match,replace,search,split}, but keeping their original
definitions which are restricted to a RegExp receiver and do not
call out to the core 'exec' method. This is being staged separately
because the two sets of extension points are separate features with
separate functionality. The amount of behavior which is held behind
the flag is very small, just exposing the symbols as properties of
Symbol--the behavior that the String methods call out to these Symbol
properties has already been shipping unflagged.
R=yangguo@chromium.org
BUG=v8:4305,v8:4343,v8:4344,v8:4345
LOG=Y
Review URL: https://codereview.chromium.org/1637703003
Cr-Commit-Position: refs/heads/master@{#33534}
This makes it easier to see what behavior each test is verifying.
BUG=v8:3699
LOG=n
Review URL: https://codereview.chromium.org/1638853003
Cr-Commit-Position: refs/heads/master@{#33529}
This fixes corner cases where the start offsets of exception handler
regions within the handler table fall together. This assumption was
based on full-codegen code and no longer holds with the interpreter.
The tables however are still well nested and code has been added to
verify that in debug mode.
R=rmcilroy@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1633573002
Cr-Commit-Position: refs/heads/master@{#33495}
The current support for try-catch in the interpreter can handle most of
the cases appearing in our test suite. Also the flag in question did not
detect try-finally constructs. This removes the flag and instead extends
the test expectations.
R=rmcilroy@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1631593003
Cr-Commit-Position: refs/heads/master@{#33494}
The web appears to depend on being able to redeclare functions-in-blocks
in sloppy mode (examples seen so far tend to redeclare identical functions,
most likely accidentally).
This patch opens a minimal hole: two same-named function declarations
in the same scope are allowed, only in sloppy mode.
BUG=v8:4693, chromium:579395
LOG=y
Review URL: https://codereview.chromium.org/1622723003
Cr-Commit-Position: refs/heads/master@{#33478}
These tests have been disabled while support for try-finally was work in
progress. By now control flow is connected properly and the tests pass.
R=oth@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1626503002
Cr-Commit-Position: refs/heads/master@{#33474}
This implements a first prototype of stack unwinding for interpreted
frames. The unwinding machinery performs a range-based lookup in the
given handler table and potentially continues dispatching at the handler
offset. Note that this does not yet correctly restore the context to the
correct value when the handler is being entered.
R=rmcilroy@chromium.org,oth@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1605633003
Cr-Commit-Position: refs/heads/master@{#33414}
This is to fix some of the failing test262 tests with ignition flag.
In few test262 tests, there is a throw from the script scope. Rewriter::Rewrite
pass converts expression statements into assignment statements in script scope.
This causes interpreter to fail because assignment expression expects a result
in accumulator but throw statement does not return a value. To fix this, we
now mark that accumulator contains a value when visiting throw statement.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1523423003
Cr-Commit-Position: refs/heads/master@{#33408}
Now that we support eval in Ignition, remove the fallback for eval checks
and make the flag only fallback on catch blocks.
BUG=v8:4280,v8:4676
LOG=N
Review URL: https://codereview.chromium.org/1595223004
Cr-Commit-Position: refs/heads/master@{#33384}
The bulk of these were marked simply '[PASS]', while one was marked
'[PASS, FAIL]' but seems to always pass.
BUG=v8:3305, v8:4405
LOG=n
Review URL: https://codereview.chromium.org/1584863003
Cr-Commit-Position: refs/heads/master@{#33277}
This patch moves the semantics of 'const' in sloppy mode to match those
in strict mode, that is, const makes lexical (let-like) bindings, must
have an initializer, and does not create properties of the global object.
R=adamk
LOG=Y
BUG=v8:3305
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/1571873004
Cr-Commit-Position: refs/heads/master@{#33218}
As V8 becomes more and more spec-compliant, Promise polyfill libraries
like core.js expect fully correct. However, our Promises do not yet
support Symbol.species. Therefore, a case like
```
var test = new Promise(function(){});
test.constructor = function(){};
Promise.resolve(test)
```
would lead to an unhandled Promise rejection, whereas it should not
because test.constructor[Symbol.species] is undefined, so test.then
should end up constructing %Promise% as a fallback, rather than
calling test.constructor as if it were a constructor, which leads
this error checking code to throw.
For now, this patch removes the error checking code (which was not
present until recently). In an interactive test using core.js, the
error message on the console goes away with this patch. When @@species
support is in place, this patch can be reverted. A regression test
is added which checks for the same thing.
Partially reverted patch was originally out for review at
https://codereview.chromium.org/1531073004
BUG=v8:4633
LOG=Y
R=adamk,caitp88@gmail.com
Review URL: https://codereview.chromium.org/1578893002
Cr-Commit-Position: refs/heads/master@{#33217}
Does not remove the extra private state added, as doing so seems to break the
debugger.
Fixes new Test262 tests:
- built-ins/Promise/race/same-resolve-function
- built-ins/Promise/race/same-reject-function
BUG=v8:4632
LOG=N
R=littledan@chromium.org, cbruni@chromium.org
Review URL: https://codereview.chromium.org/1538853002
Cr-Commit-Position: refs/heads/master@{#33214}
Testing the promise status is not enough to ensure that resolve functions are
called only once.
This change adds a similar version of the [[AlreadyResolved]] slot to the
Promise.all resolve element function, and also ensures that [[AlreadyResolved]]
is respected in the Promise executor, and when resolving thenables. This means
replacing PromiseReject() shortcuts with promiseCapability.reject(), which has
an [[AlreadyResolved]] record in a context slot.
Also ensures that changes to the list accumulator in Promise.all() is not observable
via accessors installed in the Array prototype chain, using the same mechanism used
in several Array methods.
Fixes the following Test262 tests:
- built-ins/Promise/all/call-resolve-element-items.js
- built-ins/Promise/all/call-resolve-element.js
- built-ins/Promise/all/call-resolve-element-after-return.js
- built-ins/Promise/all/same-reject-function.js
- built-ins/Promise/all/resolve-from-same-thenable.js
- built-ins/Promise/all/resolve-before-loop-exit.js
- built-ins/Promise/all/resolve-before-loop-exit-from-same.js
- built-ins/Promise/exception-after-resolve-in-executor.js
- built-ins/Promise/exception-after-resolve-in-thenable-job.js
- built-ins/Promise/all/does-not-invoke-array-setters.js
BUG=v8:4633
LOG=N
R=littledan@chromium.org, cbruni@chromium.org
Review URL: https://codereview.chromium.org/1534813005
Cr-Commit-Position: refs/heads/master@{#33163}
Addresses TODO by Dan --- simply by moving the check and exception
earlier in the function, before calling NewPromiseCapability() or
loading the constructor.
BUG=v8:4633
LOG=N
R=adamk@chromium.org, littledan@chromium.org, cbruni@chromium.org
Fixes 'test262/built-ins/Promise/prototype/then/context-check-on-entry'
Review URL: https://codereview.chromium.org/1561193002
Cr-Commit-Position: refs/heads/master@{#33137}
Correctly validate promise capabilities in NewPromiseCapabilities() and in
GetCapabilitiesExtractor(). Also explicitly follows Promise.race step 2 and
similar cases in the spec, rather than passing tests asserting these steps
are taken in NewPromiseCapability
Also changes Promise.reject to match specification.
Fixes the following test262 tests:
- built-ins/Promise/all/capability-executor-called-twice.js
- built-ins/Promise/all/capability-executor-not-callable.js
- built-ins/Promise/prototype/then/capability-executor-called-twice.js
- built-ins/Promise/prototype/then/capability-executor-not-callable.js
- built-ins/Promise/reject/capability-executor-called-twice.js
- built-ins/Promise/reject/capability-executor-not-callable.js
- built-ins/Promise/resolve/capability-executor-called-twice.js
- built-ins/Promise/resolve/capability-executor-not-callable.js
- built-ins/Promise/race/capability-executor-called-twice.js
- built-ins/Promise/race/capability-executor-not-callable.js
- built-ins/Promise/reject/S25.4.4.4_A3.1_T1.js
- built-ins/Promise/race/S25.4.4.3_A3.1_T2.js
Per v8:3641, mjsunit/es6/debug-promises/throw-with-undefined-reject.js becomes invalid. The exception is thrown before the chain handler is ever invoked, and is caught externally by d8's own handler --- thus evading the uncaught exception event.
BUG=v8:4633, v8:4631, v8:4243, v8:3641
LOG=N
R=littledan@chromium.org, cbruni@chromium.org
Review URL: https://codereview.chromium.org/1531073004
Cr-Commit-Position: refs/heads/master@{#33128}
Throws an error if rest parameters are used. This feature is not
yet supported in interpreter.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1561603002
Cr-Commit-Position: refs/heads/master@{#33120}
This patch relands a change to ES2015 Promises which brings us closer to
spec compliance. In this new version, a bug which would lose async callstack
data was fixed.
R=adamk
CC=rossberg,caitp
LOG=Y
BUG=v8:3641
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/1538663002
Cr-Commit-Position: refs/heads/master@{#33065}
When the 'y' flag was shipped, the property RegExp.prototype.unicode was
accidentally also shipped. However, the existence of this property should
be a usable feature testing point. This patch adds the 'unicode' getter on
RegExp.prototype only if the --harmony-regexp-unicode flag is turned on.
R=cbruni
CC=yangguo
BUG=v8:4644
LOG=Y
Review URL: https://codereview.chromium.org/1550713002
Cr-Commit-Position: refs/heads/master@{#33049}
According to the ES2015 specification, bound functions are exotic
objects, and thus don't need to be implemented as JSFunctions. So
we introduce a new JSBoundFunction type to represent bound functions
and make them optimizable. This already improves the performance of
calling or constructing bound functions by 10-100x depending on the
use case because we avoid the crazy dance between JavaScript and C++
that was implemented in v8natives.js previously.
There's still room for improvement in the performance of actually
creating bound functions, which is also relevant in practice, but
we already have a plan how to accomplish that later.
The mips/mips64 ports were contributed by akos.palfi@imgtec.com.
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
BUG=chromium:535408, chromium:571299, v8:4629
LOG=n
Committed: https://crrev.com/ca8623eaa468cba65a5adafcdfb4615966f43ce2
Cr-Commit-Position: refs/heads/master@{#33042}
Review URL: https://codereview.chromium.org/1542963002
Cr-Commit-Position: refs/heads/master@{#33044}
Reason for revert:
Breaks arm64 sim nosnap: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20nosnap%20-%20debug/builds/805/steps/Check/logs/function-bind
Original issue's description:
> [runtime] Introduce dedicated JSBoundFunction to represent bound functions.
>
> According to the ES2015 specification, bound functions are exotic
> objects, and thus don't need to be implemented as JSFunctions. So
> we introduce a new JSBoundFunction type to represent bound functions
> and make them optimizable. This already improves the performance of
> calling or constructing bound functions by 10-100x depending on the
> use case because we avoid the crazy dance between JavaScript and C++
> that was implemented in v8natives.js previously.
>
> There's still room for improvement in the performance of actually
> creating bound functions, which is also relevant in practice, but
> we already have a plan how to accomplish that later.
>
> The mips/mips64 ports were contributed by akos.palfi@imgtec.com.
>
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
> BUG=chromium:535408, chromium:571299, v8:4629
> LOG=n
>
> Committed: https://crrev.com/ca8623eaa468cba65a5adafcdfb4615966f43ce2
> Cr-Commit-Position: refs/heads/master@{#33042}
TBR=cbruni@chromium.org,hpayer@chromium.org,yangguo@chromium.org,akos.palfi@imgtec.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:535408, chromium:571299, v8:4629
Review URL: https://codereview.chromium.org/1552473002
Cr-Commit-Position: refs/heads/master@{#33043}
According to the ES2015 specification, bound functions are exotic
objects, and thus don't need to be implemented as JSFunctions. So
we introduce a new JSBoundFunction type to represent bound functions
and make them optimizable. This already improves the performance of
calling or constructing bound functions by 10-100x depending on the
use case because we avoid the crazy dance between JavaScript and C++
that was implemented in v8natives.js previously.
There's still room for improvement in the performance of actually
creating bound functions, which is also relevant in practice, but
we already have a plan how to accomplish that later.
The mips/mips64 ports were contributed by akos.palfi@imgtec.com.
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
BUG=chromium:535408, chromium:571299, v8:4629
LOG=n
Review URL: https://codereview.chromium.org/1542963002
Cr-Commit-Position: refs/heads/master@{#33042}
We'll be able to optimize rest parameters in TurboFan similarly to the arguments array. This CL restores the previous behavior, and a follow-on will enable TurboFan optimization.
(TBR for rossberg since we discussed the revert beforehand. The only changes are a few lines related to tests and rebasing.)
TBR=rossberg@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1537683002
Cr-Commit-Position: refs/heads/master@{#33024}
Consecutive registers are allocated in two passes. First we "reserve"
a set of registers and these get allocated when we actually use them.
If we request for a temporary register before we use all the consecutive
registers, the earlier implementation does not gaurantee that it allocates
outside the reservation for consecutive registers. This could cause problems
for example, in call_func(a, b++, c). This cl fixes
TemporaryRegisterScope::NewRegister, to return a new temporary register
outside the reservation for consecutive registers.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1531273002
Cr-Commit-Position: refs/heads/master@{#33005}
