This reverts commit df1676e6.

Reason for revert: https://crbug.com/v8/7382#c26

Original change's description:
> [array] Implement Array.p.sort in Torque
> 
> This CL implements a generic baseline version and 3 fastpaths, for
> various elements kinds, of Array.p.sort in Torque. Details can be found
> in the Design Doc: https://goo.gl/Ge321G.
> 
> Performance impact on micro benchmarks depends on the element kind
> and whether the user provides a comparison function.
> For HoleySmi/HoleyElement we have a speedup between 1.5-1.8 across
> the board. For Dictionary we are slower in all micro benchmarks (0.7).
> For PackedSmi it depends on the call site and whether or not a
> comparison function is used.
> 
> Detailed numbers: https://goo.gl/mTyPSb
> 
> Bug: v8:7382
> Change-Id: I50acabd2032af0bc01d36b0de0f555d66be56a7e
> Reviewed-on: https://chromium-review.googlesource.com/1061523
> Commit-Queue: Simon Zünd <szuend@google.com>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53481}

TBR=cbruni@chromium.org,jgruber@chromium.org,szuend@google.com

Change-Id: I4c1b32a434d49caba67c80bccb068390607f90a2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7382
Reviewed-on: https://chromium-review.googlesource.com/1085407Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53494}

The slots for imported functions are unused by now. Shrink the table to
only store pointers for non-imported functions (i.e. wasm functions
defined in this module).

R=mstarzinger@chromium.org

Change-Id: I6d13f889528b42beca73c860a800bde7a8e921ab
Reviewed-on: https://chromium-review.googlesource.com/1084845Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53493}

This implements a reasonable overload resolution strategy for operators:

An overload is selected if it is strictly better than all alternatives.
This means that it has to be strictly better in at least one parameter,
and better or equally good in all others.

When comparing a pair of corresponding parameters of two overloads...
... they are considered equally good if:
    - They are equal.
    - Both require some implicit conversion.
... one is considered better if:
    - It is a strict subtype of the other.
    - It doesn't require an implicit conversion, while the other does.

If no overload is strictly better than all alternatives, this results
in a compile error.

Bug: v8:7793
Change-Id: I8c7aadce5799ef0f854887b039e94c9c0363816d
Reviewed-on: https://chromium-review.googlesource.com/1076292
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53492}

This avoids embedding the {CEntryStub} into generated {WasmCode} and
instead loads it from the instance object. It is another step towards
making the generated code independent of the Isolate.

R=clemensh@chromium.org
BUG=v8:7472

Change-Id: Ic6ab7602a77fc11e6ec4a03e1bdba647d54df5e3
Reviewed-on: https://chromium-review.googlesource.com/1084841Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53491}

This moves the generation of the WasmCode structure into the
PipelineWasmCompilationJob, removing WasmCodeDesc in the process.
WasmCodeDesc was a structure that was not understood by other parts of
the compiler, including the disassembler. Using WasmCode right away
enables printing code comments for turbolizer.

Change-Id: Ie5cca131829bc842c51c999ea14d0dc339b3e028
Reviewed-on: https://chromium-review.googlesource.com/1073312
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53490}

Because it's dead.

Change-Id: I0c5578f57b1fd5ba5960e6070fb2828b6f0822be
Reviewed-on: https://chromium-review.googlesource.com/1084837Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53489}

1) The code table never grows, so store it in a heap-allocated byte
   array instead of an std::vector.
2) Rename {functions_count} to {num_functions} for consistency with
   {num_imported_functions} and occurences in other data structures.

R=mstarzinger@chromium.org

Bug: v8:7754
Change-Id: Id9d66545ed7aa675d663dad5936a9ef6d44ace7d
Reviewed-on: https://chromium-review.googlesource.com/1066014
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53488}

This makes stack checks in WasmCode independent of the underlying
Isolate by loading the limit address from the WasmInstanceObject instead
of embedding it into the instruction stream. It hence removes the last
use of the Isolate field from WasmGraphBuilder.

Additionally this introduces the notion of a "runtime stub" which
represents stub code global to the NativeModule that can be directly
called from each WasmCode in the same module. These stubs can act as
trampolines via which Isolate-independent WasmCode can enter other V8
builtins or runtime functions that remain Isolate-dependent. They will
eventually replace the current "trampoline" in a NativeModule.

R=titzer@chromium.org
BUG=v8:7424

Change-Id: Ie1f5582ee656b1ab7716ea06316d6e21a0268e74
Reviewed-on: https://chromium-review.googlesource.com/1078732
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53487}

Change-Id: I21f88bffb9fcc08c5b4616d77f90565714124082
Reviewed-on: https://chromium-review.googlesource.com/1076607Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
Cr-Commit-Position: refs/heads/master@{#53486}

Also, remove cctest/test-instruction-scheduler/DeoptInMiddleOfBasicBlock
from skip-list.

Change-Id: I392cab0c96b7adc5e9c94eacb60c97e09f0ec16a
Reviewed-on: https://chromium-review.googlesource.com/1084591Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#53485}

This adds a decorator to add the wasm bytecode offset as origin
for graph nodes and emits a little table that maps lines in the
generated wasm assembly listing to the corresponding bytecode
offset.

Change-Id: Ibc0431a122e543f95173ffc3b1b4ca461e372f28
Reviewed-on: https://chromium-review.googlesource.com/1071290Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53484}

BUG=v8:7308
TBR=ishell@chromium.org, tebbi@chromium.org

Change-Id: I0f7de13967d3e109b40d7158ee29775754c3d108
Reviewed-on: https://chromium-review.googlesource.com/1082475
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53483}

(Pre-work for adding special-purpose data structures as subclasses.)

BUG=v8:7308

Change-Id: I82a5a96e18c3321e9d5b783642516ff869b45f27
Reviewed-on: https://chromium-review.googlesource.com/1084474
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53482}

This CL implements a generic baseline version and 3 fastpaths, for
various elements kinds, of Array.p.sort in Torque. Details can be found
in the Design Doc: https://goo.gl/Ge321G.

Performance impact on micro benchmarks depends on the element kind
and whether the user provides a comparison function.
For HoleySmi/HoleyElement we have a speedup between 1.5-1.8 across
the board. For Dictionary we are slower in all micro benchmarks (0.7).
For PackedSmi it depends on the call site and whether or not a
comparison function is used.

Detailed numbers: https://goo.gl/mTyPSb

Bug: v8:7382
Change-Id: I50acabd2032af0bc01d36b0de0f555d66be56a7e
Reviewed-on: https://chromium-review.googlesource.com/1061523
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53481}

Removed most of mirrors.js and debug.js.
Further steps:
- migrate liveedit.js to native,
- remove debugger context.

R=yangguo@chromium.org
TBR=leszeks@chromium.org

Bug: v8:5530
Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I291ef20ef3c63a424d32e3e0c9d0962a6ca382d1
Reviewed-on: https://chromium-review.googlesource.com/1081176
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53480}

This is a reland of 49c4ac77

Original change's description:
> [inspector] added Runtime.installBinding method
>
> A lot of different clients use console.debug as a message channel from
> page to protocol client. console.debug is a little slow and not
> designed for this use case.
>
> This CL introduces new method: Runtime.installBinding. This method
> installs binding function by given name on global object on each
> inspected context including any context created later.
> Binding function takes exactly one string argument. Each time when
> binding function is called, Runtime.bindingCalled notification is
> triggered and includes passed payload.
>
> Binding function survives page reload and reinstalled right after
> console object is setup. So installed binding can be used inside
> script added by Page.addScriptToEvaluateOnNewDocument so client may do
> something like:
> Runtime.installBinding({name: 'send'});
> Page.addScriptToEvaluateOnNewDocument({source: 'console.debug = send'});
> .. navigate page ..
>
> In microbenchmark this function is ~4.6 times faster then
> console.debug.
>
> R=lushnikov@chromium.org,pfeldman@chromium.org
>
> Bug: none
> Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
> Change-Id: I3e0e231dde9d45116709d248f6e9e7ec7037e8e3
> Reviewed-on: https://chromium-review.googlesource.com/1077662
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53462}

TBR=dgozman@chromium.org

Bug: none
Change-Id: I58d053581a86f15338dea621498058b7b75c7c85
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/1081833Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53479}

Change-Id: I204a021ffc8b120ffe232e3f5db924e54c6d980e
Reviewed-on: https://chromium-review.googlesource.com/1083337Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53478}

Also enables tests for globals and mixed type use

R=gdeepti@chromium.org,bbudge@chromium.org,clemensh@chromium.org,titzer@chromium.org
BUG=v8:6020

Change-Id: I828f1628a1c27d9f07ba3a830600f81c5a404b2d
Reviewed-on: https://chromium-review.googlesource.com/1080340Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Aseem Garg <aseemgarg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53477}

Change code to propagate errors/exceptions to the top, and throw only once.

Bug: v8:7684
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I9a2d15cc4931f5bf029d2a8d78ad86e61f8db452
Reviewed-on: https://chromium-review.googlesource.com/1066808
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53476}

Adds a new flag v8_deprecate_get_isolate that marks
HeapObject::GetIsolate/GetHeap, Handle<T>(T*) and handle<T>(T*) as
[[deprecated]]. Deprecation warnings are not converted to errors so an
entire build can be completed to collect all the warnings.

Also adds a new script tools/collect_deprecation_stats.sh which runs the
build (assuming the flag is set) and collects the number of uses of
deprecated functions. E.g. at the time of upload, we get:

Total deprecated calls: 2265
    515 GetHeap
    842 GetIsolate
    210 handle
    698 Handle

Bug: v8:7786
Change-Id: I7043c597fa90bc77759a357ef3c2a5fefe933491
Reviewed-on: https://chromium-review.googlesource.com/1082478Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53475}

This reverts commit 0f23cedd.

Reason for revert: buildbot failures

Original change's description:
> [in-place weak refs] Replace WeakCells in DescriptorArray.
> 
> BUG=v8:7308
> 
> Change-Id: Ib0ad52916d6f5b65e7612981b467b491d832f505
> Reviewed-on: https://chromium-review.googlesource.com/1075053
> Commit-Queue: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53473}

TBR=ulan@chromium.org,marja@chromium.org,tebbi@chromium.org,ishell@chromium.org

Change-Id: I713ab10650f933a8218a61521868d6cd16cb821e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7308
Reviewed-on: https://chromium-review.googlesource.com/1082218Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53474}

BUG=v8:7308

Change-Id: Ib0ad52916d6f5b65e7612981b467b491d832f505
Reviewed-on: https://chromium-review.googlesource.com/1075053
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53473}

Drive-by-fix:
- Add CSA::LoadElementsKind helper

Bug: v8:7796
Change-Id: Icbf81effdd42efa7f8ec56f8d1a40c331c7a25e4
Reviewed-on: https://chromium-review.googlesource.com/1078849
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53472}

We can allow right-trimming new space WeakFixedArrays at the end of mark
compact collection.

BUG=v8:7308

Change-Id: I1aa716b467952520f152c338f2042e023f6330ff
Reviewed-on: https://chromium-review.googlesource.com/1082198Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53471}

This reverts commit 49c4ac77.

Reason for revert: breaks linux_chromium_rel_ng when rolling into Chromium: https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux_chromium_rel_ng/107377

Original change's description:
> [inspector] added Runtime.installBinding method
> 
> A lot of different clients use console.debug as a message channel from
> page to protocol client. console.debug is a little slow and not
> designed for this use case.
> 
> This CL introduces new method: Runtime.installBinding. This method
> installs binding function by given name on global object on each
> inspected context including any context created later.
> Binding function takes exactly one string argument. Each time when
> binding function is called, Runtime.bindingCalled notification is
> triggered and includes passed payload.
> 
> Binding function survives page reload and reinstalled right after
> console object is setup. So installed binding can be used inside
> script added by Page.addScriptToEvaluateOnNewDocument so client may do
> something like:
> Runtime.installBinding({name: 'send'});
> Page.addScriptToEvaluateOnNewDocument({source: 'console.debug = send'});
> .. navigate page ..
> 
> In microbenchmark this function is ~4.6 times faster then
> console.debug.
> 
> R=​lushnikov@chromium.org,pfeldman@chromium.org
> 
> Bug: none
> Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
> Change-Id: I3e0e231dde9d45116709d248f6e9e7ec7037e8e3
> Reviewed-on: https://chromium-review.googlesource.com/1077662
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53462}

TBR=dgozman@chromium.org,lushnikov@chromium.org,pfeldman@chromium.org,kozyatinskiy@chromium.org

Change-Id: I1ebafd42db01d8a6435d58386f2c667b92db12f1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: none
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/1082311Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53470}

Pass heap directly into RelocInfo::set_target_object and its calling
functions to avoid HeapObject::GetHeap().

Bug: v8:7786
Change-Id: I516b8b2d80a86ba5aba70160290e78354bb9a7b8
Reviewed-on: https://chromium-review.googlesource.com/1080548Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53469}

Most MIPS64 processors have user space of 2^40 bytes. Therefore,
we need to lower the address space limit in WasmMemoryTracker
for this particular architecture.

Change-Id: Ic9945af7a15ecba7dfabfe996140941ada089b2a
Reviewed-on: https://chromium-review.googlesource.com/1079551Reviewed-by: Eric Holk <eholk@chromium.org>
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#53468}

Remove all uses of GetIsolate/GetHeap by passing Isolate in from all
call sites.

Bug: v8:7786
Change-Id: I64ff8d5796db9d602e86bff4d0b9297cbe700d0d
Reviewed-on: https://chromium-review.googlesource.com/1080819Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53467}

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I4a29336a585bb690f915c876b3b07eb2601d027b
Reviewed-on: https://chromium-review.googlesource.com/1080225
Commit-Queue: Hidy Han <hidyhan@chromium.org>
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53466}

It is created automatically for each isolate.

Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: If366becb2fe4c02b150cbbe9a2d425f4de63687b
Reviewed-on: https://chromium-review.googlesource.com/1079900Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53465}

Port 53d4dfc3

Original Commit Message:

    Compress the parameter count (and function length) stored in
    SharedFunctionInfo to a uint16_t. This limits us to 2^16 - 1 parameters
    per function, minus one for the "don't adapt arguments" sentinel value,
    which is one fewer than Code::kMaxArguments was already. Anyway, 65534
    arguments should be enough for anyone!

    This drops SFI size by 4 bytes.

R=leszeks@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: I23db04fd41ad577949cd8d45bab82c77019d9350
Reviewed-on: https://chromium-review.googlesource.com/1081450Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#53464}

Inspector may change protocol and it can end up with broken headless
bot.

R=dgozman@chromium.org

Bug: none
Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ia813ecebcd509d66ac2291d2836f556e8fb3a096
Reviewed-on: https://chromium-review.googlesource.com/1081338Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53463}

A lot of different clients use console.debug as a message channel from
page to protocol client. console.debug is a little slow and not
designed for this use case.

This CL introduces new method: Runtime.installBinding. This method
installs binding function by given name on global object on each
inspected context including any context created later.
Binding function takes exactly one string argument. Each time when
binding function is called, Runtime.bindingCalled notification is
triggered and includes passed payload.

Binding function survives page reload and reinstalled right after
console object is setup. So installed binding can be used inside
script added by Page.addScriptToEvaluateOnNewDocument so client may do
something like:
Runtime.installBinding({name: 'send'});
Page.addScriptToEvaluateOnNewDocument({source: 'console.debug = send'});
.. navigate page ..

In microbenchmark this function is ~4.6 times faster then
console.debug.

R=lushnikov@chromium.org,pfeldman@chromium.org

Bug: none
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I3e0e231dde9d45116709d248f6e9e7ec7037e8e3
Reviewed-on: https://chromium-review.googlesource.com/1077662
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53462}

This reverts commit 003159e7.

Reason for revert: breaks roll into Chromium: https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux_chromium_headless_rel/3140

Original change's description:
> [inspector] RemoteObject.description should be empty for primitive type
> 
> We currently report description field for numbers. On client side user
> can calculate description as remoteObject.unserializableValue ||
> (remoteObject.value + ''). Let's report description only for objects to
> simplify value -> remoteObject logic a bit.
> 
> R=​dgozman@chromium.org
> TBR=jgruber@chromium.org
> 
> Bug: chromium:595206
> Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
> Change-Id: I91356a44aa3024e20c8f966869abf4a41b88e4bc
> Reviewed-on: https://chromium-review.googlesource.com/737485
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53453}

TBR=dgozman@chromium.org,pfeldman@chromium.org,kozyatinskiy@chromium.org

Change-Id: Ifc184e1ac158d9ea7034922a7250444448fac49f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:595206
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/1081207Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53461}

- Adds v/pshufhw, v/palignr instructions to assembler and
  macro-assembler.
- Uses better instruction sequences for 32x4 shuffles using half-
  shuffles and blends.
- Uses better instruction sequences for 16x8 shuffles.
- Uses better instruction sequences for concatenating 8x16 shuffles.

Change-Id: I3e6dca2937a2b167c754c47331c3a2f8ab9786db
Reviewed-on: https://chromium-review.googlesource.com/1066986
Commit-Queue: Bill Budge <bbudge@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53460}

This is another step to remove a huge amount of legacy code from v8.

R=dgozman@chromium.org

Bug: v8:5530
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I634bda41c53a49dc4912291eb52f02847f56f4f3
Reviewed-on: https://chromium-review.googlesource.com/1080398Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53459}

Removes all explicit calls to GetIsolate() in runtime/ by passing it
through calling functions.

Bug: v8:7786
Change-Id: I6485827ea3ef9b215ca487b1f823c9f585f31f98
Reviewed-on: https://chromium-review.googlesource.com/1080747Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53458}

Removes all explicit calls to GetIsolate() in runtime/ by passing it
through calling function functions and implicit calls via the single
argument Handle constructor and handle function.

Bug: v8:7786
Change-Id: I96ac2289a72a42c7abb6754418fecb8e03f2bb29
Reviewed-on: https://chromium-review.googlesource.com/1080528
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53457}

Removes all explicit calls to GetIsolate() in builtins/ by passing it
through from calling functions and implicit calls via the Handle
constructor.

Bug: v8:7786
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I32e1cdee47075742e677a5f738a33ad30be515c6
Reviewed-on: https://chromium-review.googlesource.com/1079548Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53456}

Tests that pointed out error are
cctest/test-code-generator/FuzzAssembleMove and
cctest/test-multiple-return/ReturnLastValueFloat32
on big endian architecture.

Change-Id: I47eb5d3b3aeffef4531f7961e94c0ccd7dece191
Reviewed-on: https://chromium-review.googlesource.com/1078755Reviewed-by: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#53455}