To speed up compilation times, jumbo allows files to be compiled
together. This is a well known method ("unity builds") to both
compile faster and create a poor man's "full program optimization".
We are only interested in compile times.

Background:
https://chromium.googlesource.com/chromium/src/+/master/docs/jumbo.md

Note that jumbo builds are not enabled by default.  To try this out,
add use_jumbo_build=true to your GN args.

BUG=chromium:746958

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ieb9fdccb6c135e9806dbed91c09a29aa8b8bee11
Reviewed-on: https://chromium-review.googlesource.com/579090
Commit-Queue: Mostyn Bramley-Moore <mostynb@opera.com>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47239}

This fixes a bug affecting module namespace objects, which are currently
implemented using native accessors.

Bug: v8:6681, v8:1569
Change-Id: I6a678652573a332c47315497d927c390d9da0926
Reviewed-on: https://chromium-review.googlesource.com/606027
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47238}

Don't return NoChange when the new_target input to a JSConstruct node is
already a HeapConstant, but rather use that constant in the interesting
lowering below. This was introduced accidentally by 

  https://chromium-review.googlesource.com/604790

earlier. Also don't use ShouldUseCallICFeedback predicate here, as that
doesn't really make sense for JSConstruct, but is mostly interesting for
JSCall (hence the name).

Bug: v8:5517, v8:6399, v8:6679
Change-Id: I96201281cf1a10f2bfd2dc3859455161eb310ccf
Reviewed-on: https://chromium-review.googlesource.com/607887Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47237}

This reverts commit e86c066b.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> Reland^2 "[builtins] Port getting property from Proxy to CSA"
> 
> With fixes for crbug.com/752846, crbug.com/752712, crbug.com/752850
> 
> Previously landed as: 47a97aa5 / 47113
> Previously landed as: 15ef03cb / 47159
> 
> Bug: v8:6559, v8:6557
> This is a reland of 15ef03cb
> 
> Change-Id: Ia53ffb80ebe44581fdb923d9f572be92ee3ed080
> Reviewed-on: https://chromium-review.googlesource.com/603796
> Commit-Queue: Maya Lekova <mslekova@google.com>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47235}

TBR=jkummerow@chromium.org,mstarzinger@chromium.org,franzih@chromium.org,jgruber@chromium.org,ishell@chromium.org,bmeurer@chromium.org,mslekova@google.com

Change-Id: Ibf0b9f786f3df247acaf9e7ffe9f49ec1db905d8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6559, v8:6557
Reviewed-on: https://chromium-review.googlesource.com/607928Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47236}

With fixes for crbug.com/752846, crbug.com/752712, crbug.com/752850

Previously landed as: 47a97aa5 / 47113
Previously landed as: 15ef03cb / 47159

Bug: v8:6559, v8:6557
This is a reland of 15ef03cb

Change-Id: Ia53ffb80ebe44581fdb923d9f572be92ee3ed080
Reviewed-on: https://chromium-review.googlesource.com/603796
Commit-Queue: Maya Lekova <mslekova@google.com>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47235}

NOTRY=true
TBR=mstarzinger@chromium.org,clemensh@chromium.org

Change-Id: I1c4f43b3faa40ab6cc790647aa022890cb418d07
Reviewed-on: https://chromium-review.googlesource.com/607847Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47234}

To avoid breaking Chromium we expose a stub method first, and will start
using it only when V8 rolls into Chromium and we implement it there.

Bug: chromium:751993
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ida1f96f2dfa833552e7adfa36a580a6ef1bdd1aa
Reviewed-on: https://chromium-review.googlesource.com/604812Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Sergei Datsenko <dats@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47233}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/411d3b5..220748c

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/33a9271..49fffef

TBR=machenbach@chromium.org,hablich@chromium.org

Change-Id: I0dbf7437440b15e5d2d82dd04f1133a639ac7a90
Reviewed-on: https://chromium-review.googlesource.com/607489Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47232}

This reverts commit 649b1e70.

Reason for revert: A1 Jetstream bots are still failing.

Original change's description:
> [wasm] Reland "[wasm] redirect wasm calls to js functions through a GCed table"
>
> This reverts commit 25f03308.
>
> Reason for revert: Fix the cause of bot failure and reland
>
> Original change's description:
> > Revert "[wasm] redirect wasm calls to js functions through a GCed table"
> >
> > This reverts commit eb65f35e.
> >
> > Reason for revert: Broke jetstream benchmark on android.
> >
> > BUG=chromium:750828
> >
> > Original change's description:
> > > [wasm] redirect wasm calls to js functions through a GCed table
> > >
> > > With this patch, rather than embedding the JSReceiver address directly
> > > in the WasmToJS wrappers, we put that in a fixed array with global handle
> > > scope and instead embed the location of the handle and the index in the
> > > wrapper. This ensures that the wrapper doesn't need to be patched if the
> > > GC kicks in. This is needed to get the WASM code off the GCed heap.
> > >
> > > R=​mtrofin@chromium.org
> > >
> > > Bug:
> > > Change-Id: Ie5a77a78cdecec51b04f702c63b8e4285e6a2d8d
> > > Reviewed-on: https://chromium-review.googlesource.com/581682
> > > Commit-Queue: Aseem Garg <aseemgarg@chromium.org>
> > > Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
> > > Cr-Commit-Position: refs/heads/master@{#46884}
> >
> > TBR=mtrofin@chromium.org,aseemgarg@google.com,aseemgarg@chromium.org,clemensh@chromium.org
> >
> > # Not skipping CQ checks because original CL landed > 1 day ago.
> >
> > Change-Id: I26f49ee0a1fe73cc5d8852ded87b56638be39ebf
> > Reviewed-on: https://chromium-review.googlesource.com/596268
> > Commit-Queue: Aseem Garg <aseemgarg@chromium.org>
> > Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#47059}
>
> R=​mtrofin@chromium.org,aseemgarg@google.com,aseemgarg@chromium.org,clemensh@chromium.org,sullivan@chromium.org
>
> Change-Id: I29ef35f6e612a706d9f571da3e7beb1da8b5052b
> Bug: chromium:750828
> Reviewed-on: https://chromium-review.googlesource.com/597010
> Commit-Queue: Aseem Garg <aseemgarg@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47177}

TBR=bradnelson@chromium.org,sullivan@chromium.org,mtrofin@chromium.org,aseemgarg@google.com,aseemgarg@chromium.org,clemensh@chromium.org

Bug: chromium:750828
Change-Id: I04b12c0eb0705ad809822a7d7461423be77d942a
Reviewed-on: https://chromium-review.googlesource.com/606867
Commit-Queue: Aseem Garg <aseemgarg@chromium.org>
Reviewed-by: Aseem Garg <aseemgarg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47231}

Port ee350c31

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, bjaideep@ca.ibm.com
BUG=
LOG=N

Change-Id: I2dfc7562fc327a4d8577c405d5fec8c440ef0a49
Reviewed-on: https://chromium-review.googlesource.com/606707Reviewed-by: Jaideep Bajwa <bjaideep@ca.ibm.com>
Commit-Queue: Jaideep Bajwa <bjaideep@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#47230}

This CL consolidates ownership of parameters used to compile code (which
we always specialize) in 2 places:
- ModuleEnv for compile-time data
- WasmCompiledModule for runtime data

The parameters in question are: memory size and start; globals start; 
address of indirect function tables (and their signatures, respectively); 
and address to be used for wasm call sites.

Ideally, we'd collapse this down to one place, however, we need
specialization data to survive serialization. We can achieve this we get off 
the GC heap and use a different wasm code serializer.

The CL:
- removes aliasing of parts of the specialization data, and moves
to using ModuleEnv as a token of passing around compile-time data, instead
of a mixture of ModuleEnv, WasmInstance, and some other structures. ModuleEnv
is responsible for providing a consistent view of the specialization data,
e.g. valid memory sizes (multiples of page size), and matching sized function
tables and signatures.

- removes WasmInstance, as its data is now contained by ModuleEnv.

- removes ModuleBytesEnv. We now pass the wire bytes explicitly. They can't
always be assumed as present (e.g. streaming compilation), and probably more
refactoring may need to happen once streaming compilation lands and we
better understand our dependencies.

Change-Id: Id7e6f2cf29e51b5756eee8b6f8827fb1f375e5c3
Reviewed-on: https://chromium-review.googlesource.com/592531
Commit-Queue: Mircea Trofin <mtrofin@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47229}

Reconstruct pshufb using macro

Bug: 
Change-Id: I5556ce1108378fc7a7658443cd09c3f676c16aa7
Reviewed-on: https://chromium-review.googlesource.com/603907Reviewed-by: Bill Budge <bbudge@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47228}

We are only calling {checkAvailable} with uint32_t, thus the type
received should also be uint32_t. This also gives better error messages
for integers >kMaxInt.

R=titzer@chromium.org

Change-Id: I40655b80dcc601e05fbb0c92cedba72ca806e2b3
Reviewed-on: https://chromium-review.googlesource.com/605893
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47227}

Add support for the simulation of MIPS SIMD MI10 instruction group,
which included Load Vector and Store Vector instructions. Add
corresponding test for these instructions.

Bug: 
Change-Id: I7cbc9d8dff2a779d9a716f539cd9a2bbb8ac694a
Reviewed-on: https://chromium-review.googlesource.com/595567Reviewed-by: Miran Karić <Miran.Karic@imgtec.com>
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@imgtec.com>
Cr-Commit-Position: refs/heads/master@{#47226}

Change-Id: I3f150ef3424cb28c89db6ef8fcb1a3340a8ff8b1
Reviewed-on: https://chromium-review.googlesource.com/604725Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47225}

A spec change (https://github.com/tc39/proposal-async-iteration/commit/a0dfeba1a8029012b6e964099929b8a157818c9f) introduced a number of Await operations to the spec. In turn, this caused generated bytecode for async generators to grow drastically.

This commit moves the Await within AsyncGeneratorYield (https://tc39.github.io/proposal-async-iteration/#sec-asyncgeneratoryield step 5) into a new TFJ builtin, similar in structure to AsyncGeneratorAwait, but instead of resuming the generator on resolution of the Promise, the current generator request's Promise is fulfilled instead.

This results in a reduction in generated bytecode without losing any statically available information.

BUG=v8:5855

Change-Id: Ib5bcf06132d221beffdea30639a7b4437030143b
Reviewed-on: https://chromium-review.googlesource.com/582487
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47224}

R=jgruber@chromium.org

Change-Id: I67b296c97091b4bfa3864f5187cf3e7e4d452961
Reviewed-on: https://chromium-review.googlesource.com/604800Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47223}

R=clemensh@chromium.org

Change-Id: Ie964f001792e2be9647bfd32722071dd343755d2
Reviewed-on: https://chromium-review.googlesource.com/605688Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47222}

This patch removes creation of fillers in the middle of a large page and
fixes assert in Heap::NotifyObjectLayoutChange.

The fillers in large pages are useless since we do not sweep large
object space.

Bug: chromium:752426
Change-Id: I01c230223f28d6d54b7362ee70e9d83de50678fd
Reviewed-on: https://chromium-review.googlesource.com/601994
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47221}

R=jarin@chromium.org

Change-Id: I336595bdcbdb41d7c33aa138fdc7893aa02e655b
Reviewed-on: https://chromium-review.googlesource.com/605647Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47220}

This moves deserializer setup boilerplate inside the deserializers, and
makes improper usage less likely. For instance:

  ObjectDeserializer deserializer(&scd);
  /* ... deserializer setup ... */
  MaybeHandle<HeapObject> obj = deserializer.Deserialize(isolate);
  /* ... result checks and casts ... */

has now become:

  /* All setup and casts inside deserializer, impossible to illegally
     use the same instance multiple times. */
  MaybeHandle<SharedFunctionInfo> maybe_result =
      ObjectDeserializer::DeserializeSharedFunctionInfo(
          isolate, &scd, source);

Bug: v8:6624
Change-Id: Id5a1848e024e89cf86e5292389ba7c89f31d8e6b
Reviewed-on: https://chromium-review.googlesource.com/604791
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47219}

This avoid introduction of {TypeGuard} nodes during load elimination.
Such type guard could lead to contradicting type information where a
constant {NumberConstant} node was guarded to have {ExternalPointer}
type, which would lead to an impossible constraint on representation
selection.

R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-752826
BUG=chromium:752826

Change-Id: Ida3815af24ccc8a48474b8d66117b9718f61adda
Reviewed-on: https://chromium-review.googlesource.com/605547Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47218}

This removes the last instance where we did manually what {LowerInt64}
already does.

R=titzer@chromium.org

Change-Id: I5e0de0f8ed1ae31f295e947a9fe36e4142200b65
Reviewed-on: https://chromium-review.googlesource.com/602238Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47217}

This makes sure we perform a proper holder lookup when trying to inline
API accessors calls in TurboFan. Inlining is completely disabled in case
the holder is not found, otherwise the appropriate holder is passed via
the {PropertyAccessInfo} structure (if different from the receiver).

R=bmeurer@chromium.org
TEST=cctest/test-api/ReceiverSignature
BUG=chromium:752149

Change-Id: I7b192724afd99d651b6477b2f2c8b403a10efb9d
Reviewed-on: https://chromium-review.googlesource.com/603615
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47216}

R=cbruni@chromium.org

Bug: 
Change-Id: Id1993e64375084e43479c20607a5c20778117ecc
Reviewed-on: https://chromium-review.googlesource.com/601910Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47215}

This is a reland of a6c3f143
Original change's description:
> [turbofan] enable new implementation of escape analysis
> 
> Bug: 
> Change-Id: I0218ab67bf391deb8f1b1b78811643eb84745b7c
> Reviewed-on: https://chromium-review.googlesource.com/595508
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47032}

Change-Id: I8efc9676088508c0102c70785b546d80d9c4036c
Reviewed-on: https://chromium-review.googlesource.com/603788Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47214}

Revert "Partial revert of "Remove ~MaybeHandle and statically assert that handles are trivially copyable""

This reverts commit 1dfaec26.

Reason for revert: Does not fix the performance regression, see bug.

Original change's description:
> Partial revert of "Remove ~MaybeHandle and statically assert that handles are trivially copyable"
> 
> Reason: cause Blink regression on Android
> 
> Original CL: https://chromium-review.googlesource.com/c/538463/
> 
> Bug: chromium:735910
> Change-Id: I405e71f6ffeaf9fa467036a6fafa0271a60de9d3
> Reviewed-on: https://chromium-review.googlesource.com/593247
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Commit-Queue: Loo Rong Jie <loorongjie@gmail.com>
> Cr-Commit-Position: refs/heads/master@{#46995}

R=yangguo@chromium.org,loorongjie@gmail.com,jbroman@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: chromium:735910
Change-Id: I65eecd575fb1b77471c6dd83a01df6c4e8a85214
Reviewed-on: https://chromium-review.googlesource.com/603797Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47213}

Adding the missing test for https://chromium-review.googlesource.com/c/603717.

Bug: chromium:752722
Change-Id: I8a4ca161b691532e481ebe9f7d05c306beb4c90a
Reviewed-on: https://chromium-review.googlesource.com/604792Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47212}

Another pure refactoring CL. This extracts methods used only by Deserializer
subclasses.

Bug: v8:6624
Change-Id: Ib4dd7cdc591dff217e282e68a490c8c7129b9c96
Reviewed-on: https://chromium-review.googlesource.com/602188
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47211}

Change the CALL_IC machinery inside of Ignition to collect new.target
feedback for Construct and ConstructWithSpread bytecodes instead of
collecting feedback about the target, and adapt TurboFan's JSCallReducer
to consume feedback for new.target instead of target on JSConstruct
nodes.

This enables TurboFan to inline JSCreate - and thus the actual instance
allocation - into derived leaf constructors even if the leaf constructor
itself is not inlined, and thereby removes this weird performance cliff.
The feedback for target in case of class constructors is provided by
the function context specialization, and in case of `new A`, we can
just use the feedback for new.target, as both target and new.target are
A in that case.

Bug: v8:5517, v8:6399, v8:6679
Change-Id: I0475e2500e787fd672ed037ac0faed78a8fa5dc0
Reviewed-on: https://chromium-review.googlesource.com/604790Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47210}

Bug: v8:6679
Change-Id: I1fff8ffa037629636f31ecd2b731f5b9de89ce44
Reviewed-on: https://chromium-review.googlesource.com/604789Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47209}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/181c098..411d3b5

Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/1fec0c8..98218d1

Rolling v8/tools/swarming_client: https://chromium.googlesource.com/external/swarming.client/+log/a56c2b3..42721e1

TBR=machenbach@chromium.org,hablich@chromium.org

Change-Id: I3d2d98ec9abd9d813986d3d82c010c8b0d46fa67
Reviewed-on: https://chromium-review.googlesource.com/604549Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47208}

This code appears to have been wrong forever, as it only
threw in strict mode (presumably predating ES2015 const).

In order to get exactly the right behavior, special
handling of sloppy named function expressions is required.
Rather than polluting PropertyAttributes with another
dummy value, this CL simply adds a bool output argument
to Context::Lookup to indicate that case.

Bug: v8:6677
Change-Id: I34daa5080d291808f10cbaefc91d716f0b22963b
Reviewed-on: https://chromium-review.googlesource.com/602690Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47207}

The ConstructFunctionForwardVarargs and ConstructForwardVarargs
builtins, which are used when inlining the Reflect.construct
builtin into TurboFan optimized code, didn't properly check the
new.target parameter whether it's a constructor.

Bug: chromium:752481
Change-Id: I9b8f8c429d6eaed0ff8d27fc3f6b52eb906766a2
Reviewed-on: https://chromium-review.googlesource.com/604187
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47206}

This is part of the effort to consolidate the ownership of
wasm instantiation/specialization parameters.

This change is focused solely on the interpreter part of that effort, to
verify we're not regressing performance in interpreter benchmarks.

There are two aspects being addressed:
- dataflow-wise, we always fetch the interpreter's memory view from the
runtime objects (i.e. WasmInstanceObject/WasmCompiledModule). This is
consistent with how other instance-specific information is obtained
(e.g. code, indirect functions).

- representation-wise, we do not reuse ModuleEnv/WasmInstance just for
the memory view, because it is surprising that other instance info isn't
accessed from there. 

Bug: 
Change-Id: I536fbffd8e1f142a315fa1770ba9b08319f56a8e
Reviewed-on: https://chromium-review.googlesource.com/602083Reviewed-by: Ben Titzer <titzer@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Mircea Trofin <mtrofin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47205}

The code accidentally jumped over the actual left-shift part when the
head of the array was the hole.

Bug: chromium:752722
Change-Id: I300a3ebcfafb07d6ecebc01fa57c66eb26f349ac
Reviewed-on: https://chromium-review.googlesource.com/603717Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47204}

Bug: chromium:752438
Change-Id: I6e168f0e8101cf9f28915ca94c40d408ed75d079
Reviewed-on: https://chromium-review.googlesource.com/603612
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47203}

Currently only A test operators had output, but since ABReducer and BCReducer
perform in-place replacement of A nodes into B nodes, and then sometimes into
C nodes, we need B and C nodes to have as many outputs. Otherwise, we run into
a situation where a node {x} has a use {y}, but its operators has 0 outputs,
which is inconsistent.

Bug: 
Change-Id: I0f73b83d2115dfeda3c9cbc97b9a2fc168f4c31b
Reviewed-on: https://chromium-review.googlesource.com/603716Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Alexandre Talon <alexandret@google.com>
Cr-Commit-Position: refs/heads/master@{#47202}

Bug: chromium:752750
TBR: mlippautz@chromium.org
Change-Id: I95ca30742c05be03dcaebb0cd32af04b226e23e2
Reviewed-on: https://chromium-review.googlesource.com/603652Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47201}

This reverts commit 15ef03cb.

Reason for revert: Found the following bugs

Bug: chromium:752846, chromium:752712, chromium:752850

Original change's description:
> Reland "[builtins] Port getting property from Proxy to CSA"
> 
> This reland is after fix in [heap] Delete wrong DCHECK.
> It includes moving ProxyGetProperty to its own stub to reduce
> binary size.
> 
> This is a reland of 47a97aa5
> Original change's description:
> > [builtins] Port getting property from Proxy to CSA
> > 
> > Bug: v8:6559, v8:6557
> > Change-Id: If6c51f5483adb73ddd2495cede5d85e887a3c298
> > Reviewed-on: https://chromium-review.googlesource.com/589212
> > Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> > Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> > Commit-Queue: Maya Lekova <mslekova@google.com>
> > Cr-Commit-Position: refs/heads/master@{#47113}
> 
> Bug: v8:6559, v8:6557
> Change-Id: I76acd97ba1acb62b7e7983db1741441d997050f0
> Reviewed-on: https://chromium-review.googlesource.com/600215
> Commit-Queue: Maya Lekova <mslekova@google.com>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47159}

TBR=jkummerow@chromium.org,mstarzinger@chromium.org,franzih@chromium.org,jgruber@chromium.org,ishell@chromium.org,bmeurer@chromium.org,mslekova@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I51bef25a031b02cf4deab11282473acae57f1ed3
Reviewed-on: https://chromium-review.googlesource.com/603708
Commit-Queue: Maya Lekova <mslekova@google.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47200}