This CL unifies how stack checks are handled in the Turbofan pipeline
across architectures, in preparation for properly handling stack
overflows caused by deoptimization in follow-up work. It will also
open up possibilities to simplify related logic.
How this used to work: JSStackCheck was lowered to a UintLessThan
with the stack pointer (sp) and stack limit as inputs. On x64 and ia32,
this node pattern was later recognized during instruction selection
and rewritten to dedicated operators. On other platforms, including
arm and arm64, special logic exists to avoid useless
register-to-register moves when accessing the sp.
This CL introduces a new StackPointerGreaterThan operator, which takes
the stack limit as its sole input. This is what JSStackCheck now lowers
to. This is threaded through to code generation, where we emit the
appropriate code (in the future, we will apply an additional offset to
the sp here).
In follow-up CLs, we can remove or replace remaining uses of
LoadStackPointer in CSA, Wasm, and the interpreter; and then remove
the LoadStackPointer operator, related node matchers, related register
constraints, and the pseudo-smi stack limit roots.
Bug: v8:9534
Change-Id: I0e3f1beeed65b163c4ee5787600bed8c3cc671e1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1738863
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63156}
We weren't fully using InsertChangeCompressedToTagged and similar, which
in turn made it so that we were using more NewNode. This CL unifies the
way that we generate the insertion of Change nodes regarding decompressions.
Dribe-by fix: make InsertChangeCompressedPointerToTaggedPointer actually
use Pointer.
Bug: v8:7703
Change-Id: I1d8835a54914cdab93f652ff17e39e8271a585df
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1741661
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63154}
The Osr context is a pointer, and we can make it clear in the Typer.
Known pitfall: If we have a context within a context, the innner context
pointer is typed as Any.
Change-Id: Ia4d7e43ef42ef03f835e4b71d32d117ae835feee
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1741659
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63153}
We have already parsed a function when we call CollectSourcePositions, so we
shouldn't update the parsing statistics again otherwise we will double-count.
Also, CollectSourcePositions needs to be made native-context independent, and
Blink's CountUsage counter requires a context to have been entered when it is
called and so isn't context independent.
BUG=chromium:992063
Change-Id: Idda50b98a8308f022cb90e1a18afb43982e95298
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1746472
Auto-Submit: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63151}
This CL implements a naive tiering-up strategy where the interpreter
is used for the first execution for every regex, and the compiler is
used for every execution after that. The only exception is if a
global replace is being executed on a regex, we eagerly tier-up to
native code right away.
To use the tier-up logic --regexp-tier-up needs to be set. It is
currently disabled by default.
Bug v8:9566
Change-Id: Ib64ed77cbfcde10411161c0541dfa2501a0a93bd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1710661
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Ana Pesko <anapesko@google.com>
Cr-Commit-Position: refs/heads/master@{#63150}
We might have to collect source positions for existing functions when we
start profiling, and doing so requires a context to be entered in V8. Ensure
we always enter a context by creating a temporary context and entering it before
starting profiling.
BUG=chromium:992063
Change-Id: I72b259a3ad31b712b0475f7729fb4ffdab5cdd96
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1745481
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63149}
This reverts commit d1a4706af9.
Reason for revert: Experiment over.
Original change's description:
> Reland "[ptr-compr][arm64] Temporarily enable pointer compression on arm64"
>
> This is a reland of f5611402f7
>
> Original change's description:
> > [ptr-compr][arm64] Temporarily enable pointer compression on arm64
> >
> > ... and make sure that the arm64 ptr-compr bots proceed testing V8 without
> > pointer compression in order to keep testing the other config.
> >
> > Commented out the 'extra' variant since it was crashing. Opened a bug
> > regarding that: https://bugs.chromium.org/p/v8/issues/detail?id=9568
> >
> > Similar to x64's https://chromium-review.googlesource.com/c/v8/v8/+/1607654
> >
> > Bug: v8:7703
> > Change-Id: Ifd46b029bab34524f9f536dcdbd1574f2ddcbf37
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1724216
> > Reviewed-by: Tamer Tas <tmrts@chromium.org>
> > Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> > Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#63019}
>
> Cq-Include-Trybots: luci.v8.try:v8_android_arm64_n5x_rel_ng
> Bug: v8:7703
> Change-Id: I1a82b87bf6db4e6d100aeffc29dae60ba73d8119
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1730998
> Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Tamer Tas <tmrts@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63043}
TBR=machenbach@chromium.org,tmrts@chromium.org,solanes@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:7703
Change-Id: I86a801d44ad4ea14b1388ad8ca6109cc8a57a7d7
Cq-Include-Trybots: luci.v8.try:v8_android_arm64_n5x_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1746470
Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63148}
This contains the following upstream commits:
486d3fe: Rename DEBUG to WASM_API_DEBUG
8d8e37d: Explicitly number wasm_valkind_t
299ebe0: Fix underlying types for enums
70be7c6: Fix test
Change-Id: I692fb6c909e5211920438740d2c57ea7ee74ab12
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1745483
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63147}
The BytecodeGraphBuilder still looks at the heap. This CL completely
eliminates heap lookups for:
* CreateBlockContext
* CreateFunctionContext
* CreateEvalContext
* CreateCatchContext
* CreateWithContext
Bug: v8:7790
Change-Id: I8b88215ba14a11955729b33bd0ee57219719666d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1745484
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63146}
The operator== in RegisterBase only compares the reg_code. On arm64 we have
another 'base', CPURegister. Before this change, registers from different
classes but with the same register number would compare as equal.
For example, x30 == d30 would be true, which is incorrect.
Change-Id: I8f19139df3f041b07bfa0883ec5ca768ef540802
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1745475
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Rodolph Perfetta <rodolph.perfetta@arm.com>
Cr-Commit-Position: refs/heads/master@{#63145}
Some of the Float(32|64) to CompressedSigned cases had their functions
defined already so they are virtually free to implement.
We are still missing the unsigned case so I am keeping the TODO.
Cq-Include-Trybots: luci.v8.try:v8_linux64_pointer_compression_rel_ng
Cq-Include-Trybots: luci.v8.try:v8_linux64_arm64_pointer_compression_rel_ng
Bug: v8:7703
Change-Id: Ibf40d5948226fd48aebe7f8e257c117d6a5ad478
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1708483
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63143}
- Adds regular native heap entries to the HeapObjectsMap.
- Adds a side map for keeping a mapping of native objects to their canonical
heap entry that they have been merged into.
Change-Id: Ida00628126ded1948ceb2a0cbe14da817af7f361
Bug: chromium:988350
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1720810
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63140}
This is the first in a series of changes to reduce the number of
bytecodes generated for the iteration protocol based operations.
The GetIterator bytecode introduced in this change currently loads the
@@iterator symbol from an object that was previously done using the
LdaNamedProperty bytecode. This change uses builtin-based mechanism
that would be extended to perform additional operations in the future
on absorbing the bytecodes associated with the GetIterator operation
from the iteration protocol.
Bug: v8:9489
Change-Id: I83b8b55c27bae8260bf227f355eeca1ba80cd8f0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1701852
Commit-Queue: Swapnil Gaikwad <swapnilgaikwad@google.com>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63139}
This is a reland of 1152445367
Original change's description:
> [wasm] Test concurrent code emission
>
> This extends the jump table stress test. Currently, we generate
> different thunks (on the main thread) and then concurrently update the
> jump table to jump to one of these thunks.
> With this CL, we also generate the thunks concurrently. So this also
> tests whether there is proper synchronization between code generation
> and executing it in another thread.
>
> R=ahaas@chromium.org, mstarzinger@chromium.org
>
> Bug: v8:9477
> Change-Id: I3598329e37482ebd27a13acc752581c714226184
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1735319
> Reviewed-by: Andreas Haas <ahaas@chromium.org>
> Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63097}
Bug: v8:9477
Change-Id: Iac696f1ff3cd5209231a8dd8d1500cf77c2777b8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1739370
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63138}
This adds some documentation why concurrently emitting code, patching
the jump table, and executing the jump table is safe.
R=ahaas@chromium.org
CC=mstarzinger@chromium.org, joey.gouly@arm.com
Bug: v8:9477
Change-Id: Ibe295d538a1a330c6b1d94eb1f514d1078020754
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1738856
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63137}
Since the same value is also returned in 'result' field it is still populated in accord with 'returnByValue' parameter. This behavior is consistent with 'evaluate'.
R=dgozman@chromium.org, lushnikov@chromium.org
Bug: v8:9509
Change-Id: I9f72682f87492ce5cd0759dce75ab3d75a5fe31c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1707331
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Yury Semikhatsky <yurys@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63134}
This reverts commit e2f98ec22c.
Reason for revert: Caused performance regression in ArrayLiteralInitialSpreadSmallHoley.
Original change's description:
> Use list of invalidated objects for old-to-new refs
>
> Instead of inserting "deletion" entries into the store buffer, keep
> a list of invalidated objects to filter out invalid old-to-new slots.
>
> The first CL https://crrev.com/c/1704109 got reverted because both the sweeper and the main task were modifying the invalidated slots data structure concurrently. This CL changes this, such that the sweeper only modifies the invalidated slots during the final atomic pause when the main thread is not running. The sweeper does not need to clean this data structure after the pause, since the "update pointers" phase already removed all invalidated slots.
>
> Bug: v8:9454
> Change-Id: Iffb5bf96de2c89eee1ee1231a3414a0f2a155cbc
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1733081
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Peter Marshall <petermarshall@chromium.org>
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63087}
TBR=ulan@chromium.org,petermarshall@chromium.org,dinfuehr@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:9454
Change-Id: I328b9f72df45fc9570d4a4d1b5389eac010638c7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1743970
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63131}
Cleans up a plethora of JumpIfUndefined().JumpIfNull()
occurances by introducing a new JumpIfUndefinedOrNull
bytecode.
Change-Id: I715e9dd82ca8309e0f3eb6514ddec19b4efe7dbe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1743148
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63130}
If the function has been uncompiled (bytecode flushed) it will have lost any preparsed data.
When we recompile the outer function we will regenerate this PreParseData but it wasn't
being reattached to the inner function. This CL fixes this by checking for this case in
Compiler::GetSharedFunctionInfo and creating a new NewUncompiledDataWithPreparseData to
attach to the inner function.
BUG=v8:9479
Change-Id: I5c0fc8251006f8f5c7c7f5f9dd17b2ecc671b672
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1741655
Auto-Submit: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63128}
The spec says we have to insert some wrapper code with extra line breaks
in it, but this confuses users when they see stack traces as the line
numbers come from the code with the wrapper, instead of the original.
This CL sets line_offset on the script to indicate that line numbers
should be offset by the 2 extra line breaks when reading them out e.g.
for the purpose of stack traces.
Bug: chromium:109362
Change-Id: Ib608e1043c38b595b1466766f7592e993ee3b996
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1741660
Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63127}
This CL changes the dispatch technique in the regex interpreter to
token-threaded dispatch, if computed gotos are supported by the
compiler. Otherwise old switch-based dispatch is still used
(e.g. for MSVC).
With computed gotos, less jumps will be emitted (no extra jump to
single branch point/begin of switch) and branch prediction will
be better because of no single branch point.
This CL improves performance on the RexBench Benchmark suite by ~10%.
Bug: v8:9575
Change-Id: I585ad824ff1cc595a5dfa8831ad66d6810d0119b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1733073
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Patrick Thier <pthier@google.com>
Cr-Commit-Position: refs/heads/master@{#63126}
With lazy feedback allocation, we don't have feedback vectors when function
starts executing. If we mark the function on the first execution we would
be missing feedback for the initial part of the function and hence the
optimized code will not be useful.
This cl resets the optimization markers on OSR if the invocation count of
the function is less than 1. We may still do wasted optimizations if the
function is hot enough for optimizing but not for OSRing. In the long term
we may want to fix it differently. This fix covers the most common cases
in benchmarks.
Bug: chromium:987523
Change-Id: I1cfe82e6b9f95278b77c99b77d4b981828b5c0ab
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1739373
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63124}
This CL adds an access check for the arguments to all calls to
{console} like {console.log}. This is needed since the DevTools
protocol notificiation event does not contain the context in which
the {console.log} call occurred. Only the context of the argument.
When DevTools then reads properties for the preview of the argument,
it uses arguments context, instead of the calling context, potentially
leaking objects/exceptions into the calling context.
Bug: chromium:987502, chromium:986393
Change-Id: I6f7682f7bee94a28ac61994bad259bd003511c39
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1741664
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63122}
Each LHS expression that contains an optional chain of some form is
wrapped in an OptionalChain node. This root node allows us to use a
single jump location for every individual item in the chain,
improving the performance and simplifying the implementation.
Bug: v8:9553
Change-Id: I678563928b2dbfd6200bff55801919d4fd816962
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1723359
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63120}
In instruction selector we were tagging as Compressed or Tagged Any when
we could have been more specific. Also, we were marking as Word32 or Word64
when we should have been using CompressedSigned or TaggedSigned, respectively.
Drive-by cleanup: Rename MarkAsReference to MarkAsTagged.
Bug: v8:7703
Change-Id: I4df7a17e25cfa51a1e11eac0af40be21efb50990
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1739367
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63119}
The previous ordering caused a SCOPED event to end after its parent
event, which isn't really supported in the trace format.
Change-Id: I2ddaa12596604499366854231506c889d910f951
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1741926
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Eric Seckler <eseckler@chromium.org>
Auto-Submit: Eric Seckler <eseckler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63118}
Previous differences in eager and lazy parsing meant that it was possible
that feedback vectors could be different for the same function depending on
how it was compiled. These issues have now been fixed, so remove the workaround
and add an explicit CHECK that the feedback vectors are the same.
BUG=chromium:984344,v8:9511
Change-Id: I0edfa350b1a2f236db1ee2f86bc46690da926af1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1741650
Auto-Submit: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63116}
This reverts commit 79b00555ea.
Reason for revert: needs more discussion
Original change's description:
> [torque] introduce JSAny type for user-accessible JavaScript values
>
> This CL introduces a JSAny type for user-exposed JavaScript values and
> a few new types to define it. Especially, it splits Symbol into
> PrivateSymbol (not exposed) and PublicSymbol (JavaScript exposed
> symbols).
>
> The change is mostly mechanical, but a few things are interesting:
> - PropertyKey and JSPrimitive were designed to coincide with the spec
> notions of IsPropertyKey() and primitive value, respectively.
> - Since Name is an open type, we define AnyName to be the known
> subtypes of Name. This is not too elegant, but by using AnyName
> instead of Name, typeswitch can properly conclude something if a
> subtype of Name is excluded.
>
> Small drive-by changes, which were necessary:
> - Allow subtyping on label parameters.
> - Fix the formatting of typeswitch, it was broken with union types
> in case types.
>
> Bug: v8:7793
> Change-Id: I14b10507f8cf316ad85e048fe8d53d1df5e0bb13
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1735322
> Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63114}
TBR=neis@chromium.org,jgruber@chromium.org,tebbi@chromium.org
Change-Id: Ifde7881d74afe407628f40047997339d54cb2424
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7793
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1741652
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63115}
This CL introduces a JSAny type for user-exposed JavaScript values and
a few new types to define it. Especially, it splits Symbol into
PrivateSymbol (not exposed) and PublicSymbol (JavaScript exposed
symbols).
The change is mostly mechanical, but a few things are interesting:
- PropertyKey and JSPrimitive were designed to coincide with the spec
notions of IsPropertyKey() and primitive value, respectively.
- Since Name is an open type, we define AnyName to be the known
subtypes of Name. This is not too elegant, but by using AnyName
instead of Name, typeswitch can properly conclude something if a
subtype of Name is excluded.
Small drive-by changes, which were necessary:
- Allow subtyping on label parameters.
- Fix the formatting of typeswitch, it was broken with union types
in case types.
Bug: v8:7793
Change-Id: I14b10507f8cf316ad85e048fe8d53d1df5e0bb13
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1735322
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63114}
This patch stores the home objects in private methods that
access super properties.
Bug: v8:8330
Change-Id: I2507fda0bd70183f02d162ec50a5be76c248f0ff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1724900
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Joyee Cheung <joyee@igalia.com>
Cr-Commit-Position: refs/heads/master@{#63113}
Currently, the private name symbols are displayed in the block
scopes in DevTools, though these are just implementation details
of private fields. This patch hides them from the block scope
by marking variables with names starting with `#` as synthetic.
The private fields are still going to show up in the previews
of objects, only the key symbols themselves are going to be hidden.
Bug: v8:8773, chromium:982267
Change-Id: I059472d05c26a1f035ab92718a1b7e5ecafa8dc4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1741846
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Joyee Cheung <joyee@igalia.com>
Cr-Commit-Position: refs/heads/master@{#63112}
This CL changes {descriptionForError} to not immediately return when a {stack}
is not found, but instead try to lookup and append the {message} as well.
The existing logic to build a description in a specific way when the class
of the exception does not match, is retained for backwards compatibility.
Bug: chromium:954017
Change-Id: I9fa1d2807e2877bd988f82b4b57cf329bcd9f61b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1738862
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63111}
We didn't track transitions from non-smi elements kind in builtins but we
did track them in the runtime. We should track these transitions in
builtins as well. Not tracking them uniformly causes deopts in unexpected
places which are hard to reason about.
Bug: chromium:987522
Change-Id: I09403c7365d4d2474bca3ab601887abec19aef27
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1736748
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63109}
Also roll 0705a10: Comments
Change-Id: I9802283fa68093839286779503b6073122cbc8d7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1739369
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63108}
