This reverts commit d0651bd108.
Reason for revert: Breaks gc stress with embedded snapshot:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/15355
Original change's description:
> [language] Implement optional catch binding proposal
>
> This allows the syntax `try {} catch {}` (with no binding after the
> `catch`).
>
> See https://github.com/michaelficarra/optional-catch-binding-proposal/
>
> Currently behind --harmony-optional-catch-binding.
>
> As part of the implementation, this allows TryCatchStatements to not
> have an associated catch scope; various paths which assumed they
> would have been updated to handle this case.
>
> Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
> Change-Id: Ic525b45199eef025eb05da562e10fbd4f3d7465f
> Reviewed-on: https://chromium-review.googlesource.com/571453
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Commit-Queue: Kevin Gibbons <bakkot@gmail.com>
> Cr-Commit-Position: refs/heads/master@{#48300}
TBR=rmcilroy@chromium.org,adamk@chromium.org,marja@chromium.org,gsathya@chromium.org,bakkot@gmail.com
Change-Id: I63d68160ec75b87e28d3dcdddca2d8b7d0503b46
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/702334
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48303}
This allows the syntax `try {} catch {}` (with no binding after the
`catch`).
See https://github.com/michaelficarra/optional-catch-binding-proposal/
Currently behind --harmony-optional-catch-binding.
As part of the implementation, this allows TryCatchStatements to not
have an associated catch scope; various paths which assumed they
would have been updated to handle this case.
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: Ic525b45199eef025eb05da562e10fbd4f3d7465f
Reviewed-on: https://chromium-review.googlesource.com/571453
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Kevin Gibbons <bakkot@gmail.com>
Cr-Commit-Position: refs/heads/master@{#48300}
This reverts commit 5e76ff5a4a.
Reason for revert: tsan failures - https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/17574
Original change's description:
> Reland "[wasm] always allocate memory when guard regions are needed"
>
> This reverts commit 7cf29d8df3.
>
> Original change's description:
> > [wasm] always allocate memory when guard regions are needed
> >
> > When using trap handlers, memory references do not get any checks inserted. This
> > means there is no check for a null memory as happens when the memory size is
> > 0. Normally this would be correctly caught as an out of bounds access, since the
> > low memory addresses are not normally mapped. However, if they were mapped for
> > some reason, we would not catch the out of bounds access.
> >
> > The fix is to ensure WebAssembly instances always have a guard region even if
> > the memory is size 0.
> >
> > Bug: chromium:769637
>
> Change-Id: I09fdaea92b7ccb3a6cc9e28392171ec098538a00
> Reviewed-on: https://chromium-review.googlesource.com/695812
> Commit-Queue: Eric Holk <eholk@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48293}
TBR=gdeepti@chromium.org,mtrofin@chromium.org,mlippautz@chromium.org,eholk@chromium.org,eholk@google.com,clemensh@chromium.org
Change-Id: I52d5354126158a92602b08c48703d562ac95075b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/699599
Reviewed-by: Eric Holk <eholk@chromium.org>
Commit-Queue: Eric Holk <eholk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48294}
This reverts commit 7cf29d8df3.
Original change's description:
> [wasm] always allocate memory when guard regions are needed
>
> When using trap handlers, memory references do not get any checks inserted. This
> means there is no check for a null memory as happens when the memory size is
> 0. Normally this would be correctly caught as an out of bounds access, since the
> low memory addresses are not normally mapped. However, if they were mapped for
> some reason, we would not catch the out of bounds access.
>
> The fix is to ensure WebAssembly instances always have a guard region even if
> the memory is size 0.
>
> Bug: chromium:769637
Change-Id: I09fdaea92b7ccb3a6cc9e28392171ec098538a00
Reviewed-on: https://chromium-review.googlesource.com/695812
Commit-Queue: Eric Holk <eholk@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48293}
Fix an error overwriting the `prototype` property of async generator
functions when FLAG_enable_slow_asserts is enabled.
Previously, the `initial_async_generator_prototype` field was never
written to the native context, and was always undefined. This caused
some incorrect runtime behaviour, and would crash when loading the field
using the Context::initial_aysnc_generator_prototype accessor when
attempting to cast the Undefined oddball to a JSObject.
BUG=chromium:771470, v8:5855
R=adamk@chromium.org, verwaest@chromium.org, gsathya@chromium.org
Change-Id: I13f2a518c59852bc77c2de1f2468a4eea457609e
Reviewed-on: https://chromium-review.googlesource.com/700261
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Cr-Commit-Position: refs/heads/master@{#48291}
The code in `AsmJsScanner::Next()` checks for both
end of input and parse error:
if (token_ == kEndOfInput || token_ == kParseError) {
return;
}
but until now the code in the parsing loop only checked
for `kEndOfInput`, resulting in an infinite loop on
`kParseError`.
R=bradnelson@chromium.org, mstarzinger@chromium.org
Bug: chromium:771428
Change-Id: I9170f090503590b3b9b949a0d00ab4daef85bf66
Reviewed-on: https://chromium-review.googlesource.com/699994
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48290}
In the process, also enable support for PACKED_DOUBLE_ELEMENTS arrays.
Change-Id: I16dd79276f1023e30b072d45216396533077f53c
Reviewed-on: https://chromium-review.googlesource.com/571006
Commit-Queue: Daniel Clifford <danno@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48289}
This CL speeds up a common pattern found in the React framework:
function f(a, b, c) { ... };
let f_bound = f.bind(this, 1);
let f_bound2 = f_bound(this, 2);
This CL yields roughly a 15x improvement for rebinding a bound function.
Change-Id: I4d8580a5bce422af411148bc6b3e4eb287fac9ce
Reviewed-on: https://chromium-review.googlesource.com/695206
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48283}
The Object.is builtin provides an entry point to the abstract operation
SameValue, which properly distinguishes -0 and 0, and also identifies
NaNs. Most of the time you don't need these, but rather just regular
strict equality, but when you do, Object.is(o, -0) is the most readable
way to check for minus zero.
This is for example used in Node.js by formatNumber to properly print -0
for negative zero. However since the builtin thus far implemented as C++
builtin and TurboFan didn't know anything about it, Node.js considering
to go with a more performant, less readable version (which also makes
assumptions about the input value) in
https://github.com/nodejs/node/pull/15726
until the performance of Object.is will be on par (so hopefully we can
go back to Object.is in Node 9).
This CL ports the baseline implementation of Object.is to CSA, which
is pretty straight-forward since SameValue is already available in
CodeStubAssembler, and inlines a few interesting cases into TurboFan,
i.e. comparing same SSA node, and checking for -0 and NaN explicitly.
On the micro-benchmarks we go from
testNumberIsMinusZero: 1000 ms.
testObjectIsMinusZero: 929 ms.
testObjectIsNaN: 954 ms.
testObjectIsSame: 793 ms.
testStrictEqualSame: 104 ms.
to
testNumberIsMinusZero: 89 ms.
testObjectIsMinusZero: 88 ms.
testObjectIsNaN: 88 ms.
testObjectIsSame: 86 ms.
testStrictEqualSame: 105 ms.
which is a nice 10x to 11x improvement and brings Object.is on par with
strict equality for most cases.
Drive-by-fix: Also refactor and optimize the SameValue check in the
CodeStubAssembler to avoid code bloat (by not inlining StrictEqual
into every user of SameValue, and also avoiding useless checks).
Bug: v8:6882
Change-Id: Ibffd8c36511f219fcce0d89ed4e1073f5d6c6344
Reviewed-on: https://chromium-review.googlesource.com/700254
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48275}
When atomic operations are used in loops, return the correct opcode length
for loop assignment.
Bug=v8:6842,v8:6532
Change-Id: I306db704d8a0baa5d98c05702360e6dfae11cbfa
Reviewed-on: https://chromium-review.googlesource.com/699561
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48273}
This makes sure that helper methods on the {TranslatedState} class stick
to the counting scheme used by {OptimizedFrame::Summarize} within the
stack-walker. Both now treat {kJavaScriptBuiltinContinuation} as real
JavaScript frames.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-770543
BUG=chromium:770543
Change-Id: Icda65a7efb487470d39ebf648767a488ebf2e5f1
Reviewed-on: https://chromium-review.googlesource.com/695123
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48264}
This makes sure the deoptimizer properly materializes heap objects, even
when the top-most frame happens to be a stub-frame. Without this step
the {arguments_marker} would leak into user-land and most likely be
treated as an undefined value.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-769852
BUG=chromium:769852
Change-Id: I4ba17501c5d7e68d1f402b7c2cc5ccb0fb7bfb05
Reviewed-on: https://chromium-review.googlesource.com/691996
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48262}
Until now keyed accesses to properties with string or symbol keys were
only optimized properly while the IC was monomorphic and would go
megamorphic as soon as there's another receiver map, even if the name
was still the same (i.e. the same symbol or internalized string). This
was a weird performance-cliff, that'll hurt modern code especially
because for symbols you can only access them via keyed loads and stores.
This CL fixes the state machine inside the ICs to properly transition to
POLYMORPHIC state (and stay there) as long as the new name matches the
previously recorded name. The FeedbackVector and TurboFan were already
able to deal with this and didn't need any updates.
On the micro-benchmark from the tracking bug we go from
testStringMonomorphic: 429 ms.
testSymbolMonomorphic: 431 ms.
testStringPolymorphic: 429 ms.
testSymbolPolymorphic: 5621 ms.
to
testStringMonomorphic: 429 ms.
testSymbolMonomorphic: 429 ms.
testStringPolymorphic: 429 ms.
testSymbolPolymorphic: 430 ms.
effectively eliminating the overhead for symbols completely, and
yielding a 13.5x performance boost.
This also seems to yield a 1% improvement on the ARES6 ML benchmark,
because it eliminates the KEYED_LOAD_ICs for the Symbol.species lookups.
Bug: v8:6367, v8:6278, v8:6344
Change-Id: I879fe56387b4c56203c1ad8ef8cafb6cc4c32897
Reviewed-on: https://chromium-review.googlesource.com/695108
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48261}
The TypedArray.prototype[Symbol.toStringTag] getter is currently the best (and
as far as I can tell only definitely side-effect free) way to check whether an
arbitrary object is a TypedArray - either generally TypedArray or a specific
one like Uint8Array. Using the getter is thus emerging as the general pattern
to detect TypedArrays, even Node.js now adapted it starting with
https://github.com/nodejs/node/pull/15663
for the isTypedArray and isUint8Array type checks in lib/internal/util/types.js
now.
The getter returns either the string with the TypedArray subclass name
(i.e. "Uint8Array") or undefined if the receiver is not a TypedArray.
This can be implemented with a simple elements kind dispatch, instead of
checking the instance type and then loading the class name from the
constructor, which requires a loop walking up the transition tree. This
CL ports the builtin to CSA and TurboFan, and changes the logic to a
simple elements kind check. On the micro-benchmark mentioned in the
referenced bug, the time goes from
testIsArrayBufferView: 565 ms.
testIsTypedArray: 2403 ms.
testIsUint8Array: 3847 ms.
to
testIsArrayBufferView: 566 ms.
testIsTypedArray: 965 ms.
testIsUint8Array: 965 ms.
which presents an up to 4x improvement.
Bug: v8:6874
Change-Id: I9c330b4529d9631df2f052acf023c6a4fae69611
Reviewed-on: https://chromium-review.googlesource.com/695021
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48254}
In JS to Wasm wrappers, arguments have to be converted from JavaScript's
representation to Wasm's representation. Because of property accessors, this can
result in JavaScript or even asm.js/Wasm code being run. We were previously
setting this flag before doing the parameter conversions, and if these
conversions triggered a Wasm property getter then we would try to set the flag
twice.
With this change, we wait until after all argument conversions are done to set
the flag.
Bug: chromium:769846
R=bradnelson@chromium.org
Change-Id: Ia4b56df45619dcad69f3750bb33cacfedcaeb5b2
Reviewed-on: https://chromium-review.googlesource.com/693414
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48244}
This reverts commit 1f99c66b56.
Reason for revert: Test timeouts on Win64 Debug: https://build.chromium.org/p/client.v8/builders/V8%20Win64%20-%20debug/builds/19226
Original change's description:
> [wasm] always allocate memory when guard regions are needed
>
> When using trap handlers, memory references do not get any checks inserted. This
> means there is no check for a null memory as happens when the memory size is
> 0. Normally this would be correctly caught as an out of bounds access, since the
> low memory addresses are not normally mapped. However, if they were mapped for
> some reason, we would not catch the out of bounds access.
>
> The fix is to ensure WebAssembly instances always have a guard region even if
> the memory is size 0.
>
> Bug: chromium:769637
> Change-Id: I2d0f8c107563236c3780eb7746c2f820e319c65f
> Reviewed-on: https://chromium-review.googlesource.com/693137
> Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
> Commit-Queue: Eric Holk <eholk@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48240}
TBR=gdeepti@chromium.org,mtrofin@chromium.org,eholk@chromium.org
Change-Id: I4065b367c6cfffe8dd601b67cd53ad54759ae96a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:769637
Reviewed-on: https://chromium-review.googlesource.com/692918
Reviewed-by: Eric Holk <eholk@chromium.org>
Commit-Queue: Eric Holk <eholk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48242}
based on the existing Number.parseInt.
Bug: v8:6791
Change-Id: I9169a4695807a3e435e343d239431ae7f6ccf2a1
Reviewed-on: https://chromium-review.googlesource.com/685990
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48241}
When using trap handlers, memory references do not get any checks inserted. This
means there is no check for a null memory as happens when the memory size is
0. Normally this would be correctly caught as an out of bounds access, since the
low memory addresses are not normally mapped. However, if they were mapped for
some reason, we would not catch the out of bounds access.
The fix is to ensure WebAssembly instances always have a guard region even if
the memory is size 0.
Bug: chromium:769637
Change-Id: I2d0f8c107563236c3780eb7746c2f820e319c65f
Reviewed-on: https://chromium-review.googlesource.com/693137
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Eric Holk <eholk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48240}
The WasmContext struct introduced in this CL is used to store the
mem_size and mem_start address of the wasm memory. These variables can
be accessed at C++ level at graph build time (e.g., initialized during
instance building). When the GrowMemory runtime is invoked, the context
variables can be changed in the WasmContext at C++ level so that the
generated code will load the correct values.
This requires to insert a relocatable pointer only in the
JSToWasmWrapper (and in the other wasm entry points), the value is then
passed from function to function as an automatically added additional
parameter. The WasmContext is then dropped when creating an Interpreter
Entry or when invoking a JavaScript function. This removes the need of
patching the generated code at runtime (i.e., when the memory grows)
with respect to WASM_MEMORY_REFERENCE and WASM_MEMORY_SIZE_REFERENCE.
However, we still need to patch the code at instance build time to patch
the JSToWasmWrappers; in fact the address of the WasmContext is not
known during compilation, but only when the instance is built.
The WasmContext address is passed as the first parameter. This has the
advantage of not having to move the WasmContext around if the function
does not use many registers. This CL also changes the wasm calling
convention so that the first parameter register is different from the
return value register. The WasmContext is attached to every
WasmMemoryObject, to share the same context with multiple instances
sharing the same memory. Moreover, the nodes representing the
WasmContext variables are cached in the SSA environment, similarly to
other local variables that might change during execution. The nodes are
created when initializing the SSA environment and refreshed every time a
grow_memory or a function call happens, so that we are sure that they
always represent the correct mem_size and mem_start variables.
This CL also removes the WasmMemorySize runtime (since it's now possible
to directly retrieve mem_size from the context) and simplifies the
GrowMemory runtime (since every instance now has a memory_object).
R=ahaas@chromium.org,clemensh@chromium.org
CC=gdeepti@chromium.org
Change-Id: I3f058e641284f5a1bbbfc35a64c88da6ff08e240
Reviewed-on: https://chromium-review.googlesource.com/671008
Commit-Queue: Enrico Bacis <enricobacis@google.com>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48209}
This is a reland of 9d3c4b4b91
Original change's description:
> [turbofan] Implement lowering of {JSCreateClosure}.
>
> This adds support for inline allocation of {JSFunction} objects as part
> of closures instantiation for {JSCreateClosure} nodes. The lowering is
> limited to instantiation sites which have already seen more than one
> previous instantiation, this avoids the need to increment the respective
> counter.
>
> R=jarin@chromium.org
>
> Change-Id: I462c557453fe58bc5f09020a3d5ebdf11c2ea68b
> Reviewed-on: https://chromium-review.googlesource.com/594287
> Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48176}
Change-Id: I3ec3880bea89798a34a3878e6122b95db1014151
Reviewed-on: https://chromium-review.googlesource.com/686834
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48198}
There was an issue with passing float32 parameters, if the value was
spilled on the stack and passed as stack parameter.
First, we sometimes reduced the stack pointer by 8 bytes instead of 4,
and second, there was a mismatch between movsd and movss.
R=titzer@chromium.org
Bug: chromium:718858
Change-Id: Ia884df369ddd95adeff3733f9715f589996f0b65
Also-By: ahaas@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/684738
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48181}
This reverts commit 9d3c4b4b91.
Reason for revert: Breaks cctest/test-debug/NoBreakWhenBootstrapping in no-snap mode.
Original change's description:
> [turbofan] Implement lowering of {JSCreateClosure}.
>
> This adds support for inline allocation of {JSFunction} objects as part
> of closures instantiation for {JSCreateClosure} nodes. The lowering is
> limited to instantiation sites which have already seen more than one
> previous instantiation, this avoids the need to increment the respective
> counter.
>
> R=jarin@chromium.org
>
> Change-Id: I462c557453fe58bc5f09020a3d5ebdf11c2ea68b
> Reviewed-on: https://chromium-review.googlesource.com/594287
> Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48176}
TBR=mstarzinger@chromium.org,jarin@chromium.org
Change-Id: Id52281f6a3c0b7c2603053ecf002777d5b0d6f1f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/686534
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48178}
This adds support for inline allocation of {JSFunction} objects as part
of closures instantiation for {JSCreateClosure} nodes. The lowering is
limited to instantiation sites which have already seen more than one
previous instantiation, this avoids the need to increment the respective
counter.
R=jarin@chromium.org
Change-Id: I462c557453fe58bc5f09020a3d5ebdf11c2ea68b
Reviewed-on: https://chromium-review.googlesource.com/594287
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48176}
This CL teaches the respective bytecode handlers and standalone stubs
about BigInts, and collects "kBigInt" feedback for them. However,
Turbofan does not yet care about such feedback, so it is simply converted
to "any" for now (making TF emit stub calls for BigInt operations).
Bug: v8:6791
Change-Id: I6440c108ccd79058d77adc2a6041251db9d5f81d
Reviewed-on: https://chromium-review.googlesource.com/683758
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48173}
This fixes the signature of "Math.abs" from "(signed) -> signed" to
"(signed) -> unsigned" and hence fixes cases where the absolute value
would overflow the range of signed 32-bit values. This is in sync with
spec erratas (and ECMAScript semantics).
Note that this also switches the underlying implementation of the above
absolute value function to a branch-free version.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-6838-3
BUG=v8:6838
Change-Id: Ib13b7ecd336ae386cbde7c574e727bf52f841e00
Reviewed-on: https://chromium-review.googlesource.com/684181
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48169}
This is a second attempt at landing CL 644866 which was reverted by
CL 667019.
Extends the current implementation of WASM exceptions to be able to
throw exceptions with values (not just tags).
A JS typed (uint_16) array is used to hold the thrown values. This
allows all WASM types to be stored (i32, i64, f32, and f64) as well as
be inspected in JS.
The previous CL was reverted because the WASM compiler made calls to
run time functions with tagged objects, which must not be done. To fix
this, all run time calls use the thread-level isolate to hold the
exception being processed.
Bug: v8:6577
Change-Id: I4b1ef7e2847b71a2fab8e9934a0531057db9de63
Reviewed-on: https://chromium-review.googlesource.com/677056
Commit-Queue: Karl Schimpf <kschimpf@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Eric Holk <eholk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48148}
This fixes the signatures of "Math.ceil", "Math.floor" and "Math.sqrt"
from "(float?) -> float" to "(float?) -> floatish" which avoids using a
resulting float value without coercing the value via explicit "fround"
annotations. This ensures proper ECMAScript semantics are maintained.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-6838-2
BUG=v8:6838
Change-Id: Ib5821641265bc862184adb270e8dbf8c703fdfb0
Reviewed-on: https://chromium-review.googlesource.com/681694
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48142}
This fixes the signature of "Math.min" and "Math.max" for integer values
from "(int, int...) -> signed" to "(signed, signed..) -> signed" which
properly distinguishes signed from unsigned values now. This is in sync
with the spec errata (and ECMAScript semantics).
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-6838-1
BUG=v8:6838
Change-Id: Id72836513dd86e93472a22cf1ac2e2d382ed4f23
Reviewed-on: https://chromium-review.googlesource.com/681357
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48139}
Track whether the async arrow func parameter list was simple or not; the
information is already there, we just didn't pipe it through correctly. It's
needed by PreParser so that it can create the correct Scope structure.
Implementation notes:
- I could've used async_classifier for transmitting the "is_simple" bit, but I
made it explicit (it would be unnecessary to use ExpressionClassifier for
this, as we're not classifying any expressions) instead.
- I'm also moving work (setting parameter_list.is_simple) from Parser to
ParserBase, and adding a DCHECK in Parser to assert that the work was indeed
already done.
BUG=v8:5516,chromium:765532
Change-Id: Iacf91b150d1b57996544b5e64baa7d91ac134445
Reviewed-on: https://chromium-review.googlesource.com/674695
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48132}
Memory instantiate on initialize should always patch memory
references. If memory references are not patched for no initial
memory, on subsequent calls to grow_memory in wasm functions for
instances that share a module, the references will be patched
without resetting cloned compiled values to their correct initial
values.
BUG=chromium:763439
Change-Id: I666439332379b02aa344e99d61ef3dc88ab86cc8
Reviewed-on: https://chromium-review.googlesource.com/674707
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48097}
Along with BigInt.prototype. Their functions only have skeleton
implementations. The purpose of this change is to make it easier
to gradually increase test coverage (e.g. for toString(radix)).
Of course this is still behind the --harmony-bigint flag.
Bug: v8:6791
Change-Id: Ic307fd9165c56ac782fba18d648ce893daaa718f
Reviewed-on: https://chromium-review.googlesource.com/671209
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48094}
This is primarily to aid in testing the Wasm out of bounds trap handler. We
keep track of how many faults have been recovered by the Wasm trap handler. This
count is exposed to JavaScript through a testing-only runtime function. This
allows tests to verify whether the trap handler is actually running.
Bug: v8:5277
Change-Id: Ie8037a36d84eb08166c6e40c7225d912683d5786
Reviewed-on: https://chromium-review.googlesource.com/665968
Commit-Queue: Eric Holk <eholk@chromium.org>
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48076}
This reverts commit 7b5a40222e.
Reason for revert: GC stress-test failures exposed by 7742e534a8https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/15110/steps/Mjsunit/logs/exceptions
Original change's description:
> Add capability of throwing values in WASM
>
> Extends the current implementation of WASM exceptions to be able to
> throw exceptions with values (not just tags).
>
> An JS typed array (uint_16) is used to hold thrown values, so that the
> thrown values can be inspected in JS.
>
> Bug: v8:6577
> Change-Id: I1007e79ceaffd64386b62562919cfbb920fc10c5
> Reviewed-on: https://chromium-review.googlesource.com/633866
> Commit-Queue: Karl Schimpf <kschimpf@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Eric Holk <eholk@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48001}
TBR=bbudge@chromium.org,mtrofin@chromium.org,eholk@chromium.org,clemensh@chromium.org,kschimpf@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:6577
Change-Id: I8f545183c2d2abb1bf4a0b3ee23379f3754ffd55
Reviewed-on: https://chromium-review.googlesource.com/667019
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48050}
Support inlining of Array.prototype.filter in TurboFan.
Bug: v8:1956
Change-Id: Iba4d683aaa86c6104e8a1cf4d0f549a0c516576a
Reviewed-on: https://chromium-review.googlesource.com/657021
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48040}
Given that the index we use is checked to be in array index range there is no
need for a costly ToString conversion. All involved helpers for lookup up
properties directly support Smi/HeapNumber indices directly.
Cleanup: Rename GotoUnlessNumberLessThan => GotoIfNumberGreaterThanOrEqual
Change-Id: Iaddc4940f5d984572aa218d568ca71bf694cee74
Reviewed-on: https://chromium-review.googlesource.com/640388
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48039}
This patch ensures a `TypeError` is thrown when the argument passed to
`Array.prototype.sort` or `%TypedArray%.prototype.sort` is neither a
function nor `undefined`.
Every other major JavaScript engine already threw in this case. Making
V8’s behavior match increases interoperability.
https://github.com/tc39/ecma262/pull/785
BUG=v8:6542
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I412a59810abdd118217c8d8361389ec6c2f640bd
Reviewed-on: https://chromium-review.googlesource.com/668356
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48028}
In this CL I implement streaming compilation for WebAssembly,
as described in the design doc I have sent out already.
In this implementation the decoding of sections other than the
code section is done immediately on the foreground thread.
Eventually all decoding should happen in the background. I
think it is acceptable to do the decoding on the foreground
thread for now because I have finished it already, and
decoding in the background would add even more complexity to
this CL.
Bug:v8:6785
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I285e1e5e1a5a243113c92571b25ee9bae551d0ed
Reviewed-on: https://chromium-review.googlesource.com/631721
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48022}
- Validate that atomic ops can only be called when shared memory is declared
- Throw Compile/Link erros on mismatch between declared, imported memory
- Test harness helpers for setting shared memory, tests
BUG=v8:6532
R=binji@chromium.org, bradnelson@chromium.org
Change-Id: I43fe3d04bb7e3e0a2cecca0528578f98844d2608
Reviewed-on: https://chromium-review.googlesource.com/665379
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48019}
Extends the current implementation of WASM exceptions to be able to
throw exceptions with values (not just tags).
An JS typed array (uint_16) is used to hold thrown values, so that the
thrown values can be inspected in JS.
Bug: v8:6577
Change-Id: I1007e79ceaffd64386b62562919cfbb920fc10c5
Reviewed-on: https://chromium-review.googlesource.com/633866
Commit-Queue: Karl Schimpf <kschimpf@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Eric Holk <eholk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48001}
SetForceInlineFlag is now only used in tests. Earlier, it was also used
in js builtins, because unless this flag was specified the js builtins
were not inlined. All the performance critical js builtins are moved
to turbofan builtins and SetForceInlineFlag is no longer used. We would
like to remove this flag completely to simplify inlining heuristics.
Also, this uses a bit on the SharedFuntionInfo.
Bug: v8:6682
Change-Id: I19afd27381afc212f29179f2c5477095c8174f39
Reviewed-on: https://chromium-review.googlesource.com/660739
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47997}
So far we didn't properly constant-fold JSToString operators in
JSTypedLowering where the input was a known number constant.
Bug: v8:6815
Change-Id: Iac87346b7d38f0f75461f285ea7daa2d5a5e1524
Reviewed-on: https://chromium-review.googlesource.com/663358
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47972}
When accessing elements of a global (constant) JSArray, whose backing
store is copy-on-write, we can just constant-fold the value and insert
a check that the backing store stays the same.
Bug: v8:6816, v8:6815
Change-Id: I090bcec7b1ce72a1f9ed8625680ed91e8c67f27f
Reviewed-on: https://chromium-review.googlesource.com/662757
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47963}
BigInt is a new primitive type of arbitrary precision integers,
proposed in https://tc39.github.io/proposal-bigint.
This CL introduces a corresponding instance type, map, and C++
class to V8 and adds BigInt support to a few operations (see the
test file). Much more is to come. Also, the concrete representation
of BigInts is not yet fixed, currently a BigInt is simply a wrapped
Smi.
Bug: v8:6791
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ia2901948efd7808f17cfc945f0d56e23e8ae0b45
Reviewed-on: https://chromium-review.googlesource.com/657022
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47956}
The wasm valiation incorrectly allowed simd locals, even without the
experimental flag turned on. This was not noted in the generated code
because simd opcodes were forbidden, but the interpreter could not
handle these locals.
R=clemensh@chromium.org
Bug: chromium:763697
Change-Id: I11d924ac21e50bce81d0504c2c7b252105a89f80
Reviewed-on: https://chromium-review.googlesource.com/660117
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47946}
The Typer put the wrong type on String#index and String#lastIndexOf
builtins, with an off by one on the upper bound.
Bug: chromium:762874
Change-Id: Ia4c29bc2e8e1c85b6a7ae0b99f8aaabf839a5932
Reviewed-on: https://chromium-review.googlesource.com/660000
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47942}
TurboFan wasn't able to inline calls to Array.prototype.push which
didn't have exactly one parameter. This was a rather artifical
limitation and was mostly due to the way the MaybeGrowFastElements
operator was implemented (which was not ideal by itself). Refactoring
this a bit, allows us to inline the operation in general, independent
of the number of values to push.
Array#push with multiple parameters is used quite a lot inside Ember (as
discovered by Apple, i.e. https://bugs.webkit.org/show_bug.cgi?id=175823)
and is also dominating the Six-Speed/SpreadLiterals/ES5 benchmark (see
https://twitter.com/SpiderMonkeyJS/status/906528938452832257 from the
SpiderMonkey folks). The micro-benchmark mentioned in the tracking bug
(v8:6808) improves from
arrayPush0: 2422 ms.
arrayPush1: 2567 ms.
arrayPush2: 4092 ms.
arrayPush3: 4308 ms.
to
arrayPush0: 798 ms.
arrayPush1: 2563 ms.
arrayPush2: 2623 ms.
arrayPush3: 2773 ms.
with this change, effectively removing the odd 50-60% performance
cliff that was associated with going from one parameter to two or
more.
Bug: v8:2229, v8:6808
Change-Id: Iffe4c1233903c04c3dc2062aad39d99769c8ab57
Reviewed-on: https://chromium-review.googlesource.com/657582
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47940}
It's quite common today to use Function#apply together with typed
arrays, for example to construct a String from character codes (or code
points) within a Uint8Array or Uint16Array, i.e.
String.fromCharCode.apply(undefined, uint8array)
is seen quite often on the web. But there are other interesting cases
like
Math.max.apply(undefined, float64array)
to compute the maximum value in a Float64Array, which is definitely not
the fastest implementation, but quite convenient and readable.
Unfortunately these cases hit the super-slow-path of the Function#apply
machinery in V8 currently, because Function#apply doesn't have any
fast-path for TypedArrays.
This CL adds a proper fast-path to CreateListFromArrayLike to the
ElementsAccessor, which can be used as long as the typed array that's
passed wasn't neutered. With this fast-path in place, the performance on
the micro-benchmark mentioned in the issue improves from
stringFromCharCode: 6386 ms.
stringFromCodePoint: 8752 ms.
to
stringFromCharCode: 1932 ms.
stringFromCodePoint: 4262 ms.
which corresponds to a 2.0x-3.3x improvement.
Bug: v8:2435
Change-Id: I4d39666e53644b11d5856982b005928e26f296fe
Reviewed-on: https://chromium-review.googlesource.com/657405
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47936}
TSAN finds data races in generated JavaScript code that use
access the SharedArrayBuffer backing store racily. These are races, but
they are OK in the sense that the JavaScript memory model allows for the
potential bad behavior they could introduce (e.g. potentially tearing
reads). Relaxed atomics could be used here instead, but that could
introduce performance regressions.
This change adds TSAN annotations to the TypedArray reads/writes to
prevent TSAN from warning about them.
Bug: chromium:722871
Change-Id: I0776475f02a352b678ade7d32ed6bd4a6be98c36
Reviewed-on: https://chromium-review.googlesource.com/656509
Commit-Queue: Ben Smith <binji@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47929}
The previous %StringCharCodeAt runtime entry (and the inlined intrinsic)
are obsolete and not used anymore (except in dedicated tests for this
runtime function), so remove it. And rename the %StringCharCodeAtRT
function, which is actually used to %StringCharCodeAt instead to have
a consistent naming scheme for runtime fallbacks.
Bug: v8:5049
Change-Id: I619429ef54f6efea61fc51ab9ed1d5cfe4417f99
Reviewed-on: https://chromium-review.googlesource.com/657719
Commit-Queue: Yang Guo <yangguo@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47928}
The advantage of an explicit Abort that the interpreter and the compiler know
that aborting cannot continue or throw or deopt. As a result we generate less
code and we do not confuse the compiler if the environment is not set up for
throwing (as in the generator dispatch that fails validation in
crbug.com/762057).
Bug: chromium:762057
Change-Id: I3e88f78be32f31ac49b1845595255f802c405ed7
Reviewed-on: https://chromium-review.googlesource.com/657025
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47922}
JavaScript is a dynamically typed language. But most code is
written with fixed types in mind. When debugging JavaScript,
it is helpful to know the types of variables and parameters
at runtime. It is often hard to infer types for complex code.
Type profiling provides this information at runtime.
Node.js uses the inspector protocol. This CL allows Node.js users
to access and analyse type profile for via Node modules or the
in-procress api. Type Profile helps developers to analyze
their code for correctness and performance.
Design doc: https://docs.google.com/a/google.com/document/d/1O1uepXZXBI6IwiawTrYC3ohhiNgzkyTdjn3R8ysbYgk/edit?usp=sharing
Add `takeTypeProfile` to the inspector protocol. It returns a list
of TypeProfileForScripts, which in turn contains the type profile for
each function. We can use TypeProfile data to annotate JavaScript code.
Sample script with data from TypeProfile:
function f(/*Object, number, undefined*/a,
/*Array, number, null*/b,
/*boolean, Object, symbol*/c) {
return 'bye';
/*string*/};
f({}, [], true);
f(3, 2.3, {a: 42});
f(undefined, null, Symbol('hello'));/*string*/
Bug: v8:5933
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I626bfb886b752f90b9c86cc6953601558b18b60d
Reviewed-on: https://chromium-review.googlesource.com/508588
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47920}
Add support to the JSCallReducer to recognize JSConstruct nodes where
the target is the Object constructor, and reduce them to JSCreate
nodes if either
(a) no value is passed to the Object constructor, or
(b) the target and new.target are definitely not identical, by checking
whether both target and new.target are different HeapConstants
(if they are not, then the JSCreateLowering will not be able to
do a lot with the JSCreate anyways).
This should cover the relevant cases for subclassing appropriately. It
fixes the 3-4x slowdown on the micro-benchmark mentioned in the linked
bug,
baseNoExtends: 752 ms.
baseExtendsObject: 752 ms.
baseExtendsViaFactory: 751 ms.
and thus removes the performance cliff.
R=jarin@chromium.org
Bug: v8:6801
Change-Id: Id265fd1399302a67b5790a6d0156679920c58bdd
Reviewed-on: https://chromium-review.googlesource.com/657019
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47913}
When the bailout triggered, we assumed we're generating data (i.e., we're inside
a non-arrow function). This is not true; it's possible that we're already inside
an arrow function and not generating data anyway.
BUG=v8:5516,chromium:761980
Change-Id: Iad9c8dde283031630953ef9a46c1e68bc0cee048
Reviewed-on: https://chromium-review.googlesource.com/655081
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47905}
The spec calls out to Promise.prototype.then and also passes around
the constructor of the receiver to Promise.prototype.finally.
Adds a new constructor slot to PromiseFinallyContext enum and this is
used to create a new promise in the thenFinally/catchFinally callbacks.
Created a new PromiseResolve TFS builtin refactored from
the existing PromiseResolve builtin. PromiseResolveWrapper
calls out to this TFS Builtin and is now exposed as Promise.resolve.
The thenFinally and catchFinally callbacks also call out to the
PromiseResolve TFS builtin.
Spec -- https://tc39.github.io/proposal-promise-finally/
Bug: v8:5967
Change-Id: I2ce89f14d3b149619d11e424b6e37062e466c4d5
Reviewed-on: https://chromium-review.googlesource.com/652026
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47898}
What happened:
- When rewriting in DoParseFunction, the relevant function scope is no longer in
the scope stack.
- The correct scope is given to the PatternRewriter.
- PatternRewriter called to Parser::BuildIteratorCloseForCompletion.
- BuildIteratorCloseForCompletion would just call NewTemporary (which creates
a new temporary in Parser's current scope) instead of using the scope passed to
it and calling NewTemporary on it.
- Normally this went unnoticed, since it doesn't matter that much where the
temporary is.
- But in the lazy arrow func case, the Parser's scope at that point was the
already-resolved outer scope, and a DCHECK detected this problem.
Kudos & thanks to verwaest@ for a debugging session :)
BUG=chromium:761831
Change-Id: I1e8474ce927be0330f4ba4efc0fc08fdcc328809
Reviewed-on: https://chromium-review.googlesource.com/650297
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47877}
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}
Prior to this, AllocateJSArray would go ahead and allocate an empty
FixedArray as elements if passed any capacity that is not a compile-time
constant 0.
Things break later on since we rely on the fact that empty fixed arrays
are always canonicalize, and we use
obj.elements == empty_fixed_array_constant
interchangeably with
obj.elements.length == 0.
This CL introduces two new branches in AllocateJSArray: one if the
capacity is known to be non-zero; and another that explicitly
distinguishes between 0 and non-zero capacities.
Bug: chromium:760790
Change-Id: I7c22b19ce9ce15a46f91b0f75e6b4a1ff3a29a0f
Reviewed-on: https://chromium-review.googlesource.com/645959
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47776}
We emitted rotation by 24 bits with bitwise and, but that is wrong
because the low 8 bits can wrap around and "leak" into the result.
Bug: chromium:739902
Change-Id: Id49251e89405afb1581b8c60cde808c2d8bf693d
Reviewed-on: https://chromium-review.googlesource.com/645848
Reviewed-by: Martyn Capewell <martyn.capewell@arm.com>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47746}
Use int instead of byte to store the source position when computing a
location based on the stack trace stored in an error object.
Also add tests, since this code path was not covered before (not even
for small position where it would have succeeded).
Also, add some comments about which positions are 0-based and 1-based.
R=titzer@chromium.org
Change-Id: I313dcd6c47b77093ced9bb687415715d04eafb97
Reviewed-on: https://chromium-review.googlesource.com/645527
Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47739}
When calling
Object(value)
where the value is known to be a JSReceiver, we can just replace it with
value, as the Object constructor call is a no-op in that case. Otherwise
when value is known to be not null or undefined then we can replace the
Object constructor call with an invocation of ToObject.
This covers the common pattern found in bundles generated by Webpack,
where the Object constructor is used to call imported functions, i.e.
Object(module.foo)(1, 2, 3)
There's a lot of detail in https://github.com/webpack/webpack/issues/5600
on this matter and why this pattern was chosen.
Bug: v8:6772
Change-Id: I2b4f0b4542b68b97b337ce571d6d79946c73d8bb
Reviewed-on: https://chromium-review.googlesource.com/643868
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47728}
PreParser and Parser didn't agree whether a generator in a sloppy block is a
sloppy block function or not, and thus the data generated by PreParser was
inconsistent with what the Parser wanted to restore.
BUG=v8:5516, chromium:760116
Change-Id: I0fd3c267691b8afd63a1336774769caf551c143e
Reviewed-on: https://chromium-review.googlesource.com/642886
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47727}
This CL introduces two tests to verify that the correct memory is
accessed when a wasm module invokes an wasm function imported from a
second module that accesses its (i.e., second module's) memory.
The first test verifies that the second module's memory is accessed in
case the first module does not have memory. In the second test, both the
modules have memory.
R=ahaas@chromium.org,clemensh@chromium.org,gdeepti@chromium.org
Change-Id: I75c3a5335583a91af0e7e4179c482142165b1c01
Reviewed-on: https://chromium-review.googlesource.com/637837
Commit-Queue: Enrico Bacis <enricobacis@google.com>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47702}
This reimplements functionality that was present before the decoder
refactoring. It's implemented a bit differently though by generating
the code for re-throwing an uncaught exception earlier (when generating
code for the catch).
R=titzer@chromium.org, kschimpf@chromium.org
Bug: v8:6600
Change-Id: Ie2f11837851c0602ab31506fa63475fc2d0b5047
Reviewed-on: https://chromium-review.googlesource.com/641550
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47687}
This is a reland of 6b4dc039a6
Original change's description:
> [wasm] Refactor function body decoder
>
> This refactoring separates graph building from wasm decoding. The
> WasmGraphBuilder is just a consumer of the decoded information.
> Decoding without any consumer (i.e. just validation) gets 16% faster by
> this refactoring, because no TFNode* have to be stored in the value
> stack, and all dynamic tests to determine whether the graph should be
> build are gone (measured on AngryBots; before: 110.2 +- 3.3ms, after:
> 92.2 +- 3.1 ms).
>
> This new design will allow us to also attach other consumers, e.g. a
> new baseline compiler.
>
> R=titzer@chromium.org
>
> Bug: v8:6600
> Change-Id: I4b60f2409d871a16c3c52a37e515bcfb9dbb8f54
> Reviewed-on: https://chromium-review.googlesource.com/571010
> Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Ben Titzer <titzer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47671}
TBR=titzer@chromium.org
Bug: v8:6600
Change-Id: Idd867c5a1917437de5b6e3de5917cc1c9f194489
Reviewed-on: https://chromium-review.googlesource.com/640591
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47678}
This CL introduces 4 test that verify that the effects of a grow_memory
instruction executed in a function invoked inside a loop are visible
also when the loop is over. This is needed because the
AnalyzeLoopAssignment method in function-body-decoder.cc is creating Phi
nodes only for variables assigned inside the loop. The test cases
introduced by this CL verify that the mem_size and mem_start variables
are always correct.
The tests verify the output of the current_memory instruction and the
result of loading a variable stored in the grown memory inside the
loop in the following cases:
* the memory is grown in a directly called function inside a loop;
* the memory is grown in an indirectly called function inside a loop.
R=ahaas@chromium.org,clemensh@chromium.org,gdeepti@chromium.org
Change-Id: I2992bf4086b5eac9580c87e2e0ca06364b99714c
Reviewed-on: https://chromium-review.googlesource.com/637911
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Enrico Bacis <enricobacis@google.com>
Cr-Commit-Position: refs/heads/master@{#47674}
This reverts commit 6b4dc039a6.
Reason for revert: Mips build failure: https://build.chromium.org/p/client.v8.ports/builders/V8%20Mips%20-%20builder/builds/11749
Original change's description:
> [wasm] Refactor function body decoder
>
> This refactoring separates graph building from wasm decoding. The
> WasmGraphBuilder is just a consumer of the decoded information.
> Decoding without any consumer (i.e. just validation) gets 16% faster by
> this refactoring, because no TFNode* have to be stored in the value
> stack, and all dynamic tests to determine whether the graph should be
> build are gone (measured on AngryBots; before: 110.2 +- 3.3ms, after:
> 92.2 +- 3.1 ms).
>
> This new design will allow us to also attach other consumers, e.g. a
> new baseline compiler.
>
> R=titzer@chromium.org
>
> Bug: v8:6600
> Change-Id: I4b60f2409d871a16c3c52a37e515bcfb9dbb8f54
> Reviewed-on: https://chromium-review.googlesource.com/571010
> Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Ben Titzer <titzer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47671}
TBR=titzer@chromium.org,clemensh@chromium.org
Change-Id: I76a50e355f0390cc53a2da4ceedd8830ca20a9c6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6600
Reviewed-on: https://chromium-review.googlesource.com/640870
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47672}
This refactoring separates graph building from wasm decoding. The
WasmGraphBuilder is just a consumer of the decoded information.
Decoding without any consumer (i.e. just validation) gets 16% faster by
this refactoring, because no TFNode* have to be stored in the value
stack, and all dynamic tests to determine whether the graph should be
build are gone (measured on AngryBots; before: 110.2 +- 3.3ms, after:
92.2 +- 3.1 ms).
This new design will allow us to also attach other consumers, e.g. a
new baseline compiler.
R=titzer@chromium.org
Bug: v8:6600
Change-Id: I4b60f2409d871a16c3c52a37e515bcfb9dbb8f54
Reviewed-on: https://chromium-review.googlesource.com/571010
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47671}
This makes sure the minimum memory size for WebAssembly modules derived
from asm.js is set to zero. It allows instatiation without allocating an
underlying memory, when such memory is unused. It also fixes a bug in
patching of embedded memory sizes for asm.js modules.
R=ahaas@chromium.org
TEST=mjsunit/regress/regress-crbug-759327
BUG=chromium:759327
Change-Id: If5a965b96a03cbb5ba15bc41fbaf359f74961f41
Reviewed-on: https://chromium-review.googlesource.com/637912
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47646}
