A minor optimization to the four bit rotation functions.
Drive-by: Make them constexpr.
R=ahaas@chromium.org
Bug: v8:9810
Change-Id: Ic563310030aa487f976017032291a553705d1ec2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1903972
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64854}
This removes dead classes and functions from utils.h.
R=sigurds@chromium.org
Bug: v8:9810, v8:8912
Change-Id: I8e15600f77b8ccc8ce25b4fd25e6a1b4303ad657
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1903969
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64853}
{WhichPowerOf2} is basically the same as {CountTrailingZeros}, with a
restriction to powers of two. Since it does not use or depend on any v8
internals, it can be moved to src/base/bits.h.
This CL also changes the implementation to use the CTZ builtin if
available, and falls back to popcnt otherwise.
Drive-by: Make it constexpr, and rename to {WhichPowerOfTwo}.
R=sigurds@chromium.org
Bug: v8:9810, v8:8912
Change-Id: I8368d098f9ab1247f3b9f036f1385a38de10cc6a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1903966
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64851}
This function is trivial, can and be inlined to the single use.
This makes utils.h a tiny little bit smaller.
R=verwaest@chromium.org
Bug: v8:9810, v8:8912
Change-Id: I877f3713530644a1cb9e0f286cf87f55072d33da
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1903444
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64850}
In streaming compilation, we were computing a way too low code size
estimate, since all {WasmFunction::code} fields were still zero when we
were calling {EstimateNativeModuleCodeSize}. This lead to many separate
code spaces being created during compilation, creating significant
performance and memory overhead.
This CL fixes this by passing the code section length when creating the
{NativeModule}. From this, we can compute the code size estimate just as
before.
Drive-by: Rename "functions_count" to "num_functions" in
{ProcessCodeSectionHeader} to be consistent with the declaration.
R=ahaas@chromium.org
Bug: v8:9950
Change-Id: I30a54c01ed24d0dfecb8a4b6d123015f1803ddeb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1903439
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64849}
Now incremental marker and stop-the-world marker use the same visitor,
which is derived from MarkingVisitorBase. This removes code duplication
and also should reduce binary size.
The marking worklist processing code also changes to not color the
object black before visiting it. Instead the visitor colors the
object black in ShouldVisit method.
Bug: chromium:1019218
Change-Id: I57971122f3c77ad2770b6754d696b79d802ef1a4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1901271
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64848}
This makes the {code_size_estimate} computation explicit in the caller,
and removes one of the two {NewNativeModule} constructors. It turns out
that the calculation is totally off in the streaming calculation phase,
since no function bodies have been parsed yet. So all
{WasmFunction::code} fields are still empty, and we compute an estimate
that is way too low.
This CL prepares the actual fix for that (by computing a better estimate
at specific call sites).
R=ahaas@chromium.org
Bug: v8:9950
Change-Id: I68a891c97e5f65a9c7e73e21684bdfa7e261e216
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1901273
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64845}
This CL fixes the lengths of the console dir() and table() methods to
match the WHATWG Console Standard and the IDL WPTs.
R=mathias@chromium.org
Bug: chromium:948678
Change-Id: I2c603e202a3e5995eec06dadac09807f76ee9167
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1902968
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Dominic Farolino <dom@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64840}
port 42e8c23https://crrev.com/c/1899770
Original Commit Message:
[Liftoff] Implement i64 shift with immediate
Especially on ia32 and x64, shifts with immediate generate much shorter
and more efficient code.
Change-Id: Ia7f20db8e3ed88efe8c09e4afc9dbadc8e3b0362
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1903289
Auto-Submit: Zhao Jiazhong <kyslie3100@gmail.com>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64838}
With this CL we prevent embedders to allocate backing stores that are
bigger than what can be handled by V8.
R=ulan@chromium.orgCC=jkummerow@chromium.org
Bug: chromium:1008840
Change-Id: Ifff5e14c42fbdae187283540a54ffbfeda935574
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1900455
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64837}
In the presence of default arguments, the body of the function gets
wrapped into another block. This caused our trailing-range-after-return
optimization to not apply, because the wrapper block had no source
range assigned. This CL correctly assignes a source range to that block,
which allows already present code to handle it correctly.
Note that this is not a real coverage bug; we've just been reporting
whitespace as uncovered. We're fixing it for consistency.
Originally reported on github.com/bcoe/c8/issues/66
Bug: v8:9952
Change-Id: Iab3905f558eb99126e0dad8072d03d0a312fdcd3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1903430
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64836}
Make every CEntry_* builtin except
CEntry_Return1_DontSaveFPRegs_ArgvOnStack_NoBuiltinExit
non-executable since they don't seem to be needed. The remaining one is
still required until Linkage::GetCEntryStubCallDescriptor is converted
to use CallBuiltinPointer.
Bug: v8:9338
Change-Id: Id1fcad95958ec3299328f7ed0e322ff2f766cfd4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1897540
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64835}
Since the turbo_decompression_elimination flag is removed, there
are several methods in machine-type.h that get simplified, e.g
TypeCompressedTaggedPointer() can be replaced by just
"TaggedPointer()".
Also Removing the creation of Change to/from Compressed nodes.
Removing these Change nodes' logic is left to a follow-up CL.
Bug: v8:7703
Change-Id: Iff1f9aa8361189cf781a26317fd342b942fd5aa4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1897537
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64834}
Start experiment to promote all young live objects during mark-compact.
The last CL https://crrev.com/c/1879938 got reverted because of a flaky
test, see v8:9192.
Change-Id: I16897f45fffeafbb7e70c21899976a4c026e69ba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1903432
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64832}
Creates new APIs to get Shared Memory statistics like the size of
read-only space and potentially the memory used by shared array buffers.
Currently all shared memory statistics are zero.
Bug: v8:7464
Change-Id: Ib8d58f885beaa1d65ccef7b64dd4f3db4149bca3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1900465
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64831}
When --always-promote-young-mc is enabled, this test becomes more
flaky. Increase old space size, such that objects fit into the
old generation during mark-compact.
Bug: v8:9192
Change-Id: Iad3b914c7d5b7bafa752f3b6178684a137bd8dad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1890101
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64830}
Reuse sweeping+free list allocation code from
SweepAndRetryAllocation in RawSlowRefillLinearAllocationArea.
Share code such that bugs like the linked one are less likely to
happen.
Bug: chromium:1020981
Change-Id: I0abfaa9f7a8f2b62ad24ca85774130f354104e93
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1901277
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64829}
This is a reland of 54379af9b0. Instead
of removing the limit completely, this limits to 128 parallel tasks
now. This avoids some special handling for the previous default value
of -1.
Original change's description:
> [wasm] Remove fixed limit on number of background tasks
>
> After fixing https://crbug.com/v8/8916, background compilation scales
> far beyond 10 threads, especially for TurboFan (where much more work is
> parallelizable). Thus, remove the limit of 10 background compilation
> tasks, and use all available threads instead.
>
> R=mstarzinger@chromium.org
>
> Bug: v8:8916
> Change-Id: I13c30777e3c85b2de7901b5eac3e6a41457a56f9
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1893348
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Commit-Queue: Clemens Backes <clemensb@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#64724}
Bug: v8:8916, chromium:1021442
Change-Id: Ie9a9368c74d26c4595c0e94e914b025e403daaa4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1899991
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64828}
port d710756https://crrev.com/c/1895569
Original Commit Message:
[Liftoff] Implement i64 popcnt
This is the last remaining missing instruction from the MVP. This CL
adds support for ia32, x64, arm, and arm64.
For CPUs which do not support the POPCNT instruction, there exists a
fallback implementation in C.
Change-Id: I2ebc7bc93c2a915f21139248ac1234146a1e8cb9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1902887
Auto-Submit: Zhao Jiazhong <kyslie3100@gmail.com>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64827}
port 9c4ffc3https://crrev.com/c/1897539
Original Commit Message:
[Liftoff] Implement i32 shift with immediate
In fact, shifts are used most often with a fixed shift amount. This CL
adds special handling for this in Liftoff, to generate shorter and
faster code.
Change-Id: I71ae0013f88b928188e34a54da9ca93c617fd6e2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1902888
Auto-Submit: Zhao Jiazhong <kyslie3100@gmail.com>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64826}
Runtime of this test has improved since we initially skipped it. Let's
attempt unskipping on all non-debug builds.
Bug: v8:8411
Change-Id: I5d409f7359532e3d7d18f5b0a77765165478d44a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1903426
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64825}
Lack of size information can cause debugging and observability tools to
misbehave or to fail. We can see the size for all builtins is zero with
objdump:
$ objdump -t d8 | grep Builtins_ArgumentsAdaptorTrampoline
0000000001084a00 l F .text 0000000000000000 Builtins_ArgumentsAdaptorTrampoline
^
Size is zero
Tools like bpftrace rely on the function size to guarantee a tracepoint
is added within function boundaries. Without size information, those
tools can't guarantee a tracepoint will be added safely.
Add .size directive for each builtin function, as described in
https://sourceware.org/binutils/docs-2.24/as/Size.html#Size, to fix this
issue. We can see with objdump that the size is properly set:
$ objdump -t d8 | grep Builtins_ArgumentsAdaptorTrampoline
00000000010bf820 l F .text 0000000000000140 Builtins_ArgumentsAdaptorTrampoline
R=bmeurer@chromium.org, hpayer@chromium.org, verwaest@chromium.org, yangguo@chromium.org
Change-Id: I4cd2b0a12b629498dd9d7465cc1002dda37028c7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1898807
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64824}
The (age, context) pair has to be added atomically in to the weak
array of detached contexts. Otherwise, GC may happen after insertion
of age and observe inconsistent state.
Bug: chromium:1016703
Change-Id: Icb20bed4359904b2d976986a236558542e314bbf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1895573
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64820}
Introduce new operator LoadTransform that holds a LoadTransformInfo param,
which describes the kind of load (normal, unaligned, protected), and a
transformation (splat or extend, signed or unsigned).
We have a new method that a full decoder needs to implement, LoadTransform,
which resuses the existing LoadType we have, but also takes a LoadTransform,
to distinguish between splats and extends at the decoder level.
This implements 4 out of the 10 suggested load splat/extend operations
(to keep the cl smaller), and is also missing interpreter support (will
be added in the future).
Change-Id: I1e65c693bfbe30e2a511c81b5a32e06aacbddc19
Bug: v8:9886
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1863863
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64819}
For now, both are implemented via a C call, just like i32_rol and
i32_ror. If they turn out to be critical for performance, we can still
implement them via hardware instructions on selected platforms.
R=jkummerow@chromium.org
Bug: v8:9919
Change-Id: I16affdfe397a08ef6a51d310f018b3a099e80e44
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1900454
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64816}
Now that builtins are embedded into the binary unconditionally, GC
visitation can be reduced. The interpreter dispatch table points
directly at embedded instruction starts. It is initialized once in
Isolate::Init, and its contents are immutable afterwards.
Visitation by GC is not needed.
Drive-by: Remove outdated comment on IsWasmRuntimeStub.
Bug: v8:7873
Change-Id: I14edc0beebb31c04f1429346b57ade9e8d838670
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1899773
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64814}
The separate download scripts for extra packages are going away and have been
replaced by update.py's new --package flag.
Bug: chromium:884608
Change-Id: I28f2f83a629a3fcda4a5524c10f9b10dd115e616
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1900462
Commit-Queue: Hans Wennborg <hans@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64813}
The test coverage in question is by now provided by a different set of
mjsunit tests, namely the "mjsunit/wasm/anyref-globals-interpreter"
suite which run all globals tests in --wasm-interpret-all mode.
R=ahaas@chromium.org
TEST=cctest/test-run-wasm-interpreter/ReferenceTypeLocals
Change-Id: I439b1ee74da3c36995bb3d5819e35d4074400868
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1901266
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64812}
There is at least one case where a Load output flows into an
In32LessThanOrEqual node without any bitcasts or truncations in the
middle. We have to consider these cases in the reducer.
Bug: v8:7703
Change-Id: I1ed9c41e80c0603fd287d096c3050c5ae27c2b3e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1879945
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64811}
Turbofan's instruction scheduling is currently only enabled for
mksnapshot and has thus little test coverage. This CL introduces two
new test variants, "instruction_scheduling" and
"stress_instruction_scheduling", and activates them on a selection of
bots.
Change-Id: I5917fc781e289377c58f584c770c91e31765b2de
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1899778
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64807}
Previously we were only blocking verify_stub_graph and not
FLAG_turbo_verify_machine_graph. This led to failures when
FLAG_turbo_verify_machine_graph was active (e.g when it was set to
"*").
Change-Id: I27b53f0bc1b544498d1d182903301347e5669013
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1893339
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64806}
