This reverts commit 176a2b24.

Reason for revert: performance regression on the benchmarks.

Original change's description:
> [heap] Reland "[heap] Allow a minimum semi-space size of 512K."
> 
> This patch changes the semi-space size to 512K.
> 
> > Original commit message:
> > Revert "[heap] Allow a minimum semi-space size of 512K."
> > This reverts commit 0d2ed6c3.
> > The CL introduced perf regressions: crbug.com/735649.
> > We are going to reland the CL in an isolated V8 roll to ensure
> > that perf regressions are attributed correctly.
> 
> > Original commit message:
> > > [heap] Allow a minimum semi-space size of 512K.
> > > This CL also reduces the minimum semi-space size to 512K.
> > > BUG=chromium:716032
> > BUG=chromium:735649
> 
> Change-Id: Iabc377cba2911b28d51b98bb5b85134d4e893632
> Reviewed-on: https://chromium-review.googlesource.com/575066
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46763}

TBR=ulan@chromium.org,mlippautz@chromium.org

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

Change-Id: I80f8b6699f41e91512f7cec38060c829252ff95e
Reviewed-on: https://chromium-review.googlesource.com/591309Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46982}

in preparation for caching StoreIC-Transition handlers in there.
This CL should not change behavior or performance.

The TransitionArray class no longer serves a dual purpose; it is now
simply the data structure serving that role. Further, it now supports
storing transitioning handlers in its "target" slot, which in turn have
a WeakCell pointing to the transition target (but this functionality
is not being used yet).

The interface for accessing a map's transitions, previously implemented
as a set of static functions, is now handled by the TransitionsAccessor
class. It distinguishes the following internal states:
- kPrototypeInfo: map is a prototype map, will never cache any transitions.
- kUninitialized: map can cache transitions, but doesn't have any.
- kWeakCell: map caches a single transition, stored inline. Formerly known
             as "IsSimpleTransition".
- kFullTransitionArray: map uses a TransitionArray to store transitions.
- kTuple3Handler, kFixedArrayHandler: to be used in the future for caching
                                      transitioning handlers.

Change-Id: If2aa68390981f96f317b958445a6e0b935c2a14e
Reviewed-on: https://chromium-review.googlesource.com/550118Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46981}

This reverts commit ccd8bb69.

Reason for revert: https://build.chromium.org/p/client.v8.fyi/builders/Mac%20Release%20%28Intel%29/builds/2643

Original change's description:
> Reland: [turbofan] staging new implementation of escape analysis
> 
> Reland of https://chromium-review.googlesource.com/c/565720, fixing compilation issues on the waterfall.
> 
> Bug: 
> Change-Id: Ide4f1ea4470e946820edc990c9bf027f04844efe
> Reviewed-on: https://chromium-review.googlesource.com/591667
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46975}

TBR=jarin@chromium.org,tebbi@chromium.org

Change-Id: I30016fd8d71535c02bab8678b02147195c3e97a6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/591672Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46980}

Counters for some of the getters are renamed to remove the
AccessorNameGetterCallback_ prefix. The prefix causes these getters to
be categorized under Blink C++ (and they shouldn't be). Counters are
also added for some setters which are currently being counted under
GenericNamedPropertySetterCallback and AccessorNameSetterCallback which
are both categorized as Blink C++.

Bug: 
Change-Id: Ifc2c08d3eca0460ea6b5572c7a96b3625dd7d7ea
Reviewed-on: https://chromium-review.googlesource.com/587593Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Adithya Srinivasan <adithyas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46979}

Avoid leaking because the persistent handle isn't released. To further
clarify ownership, the v8 side owns now completely the promise.

Bug: 
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ief9e44e60235fe6199fc4884ad1ccbd9e34cce8a
Reviewed-on: https://chromium-review.googlesource.com/591067Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Mircea Trofin <mtrofin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46978}

This patch makes `%DebugPrint(fn)` print `fn`’s feedback vector when
available.

Example output:

```
d8> fn = (x) => x + '.'; fn(''); %DebugPrint(fn)
DebugPrint: 0x1c12b950df81: [Function]
 - map = 0x1c12b1802361 [FastProperties]
 - prototype = 0x1c12ec904591
 - elements = 0x1c12f5702241 <FixedArray[0]> [HOLEY_ELEMENTS]
 - initial_map =
 - shared_info = 0x1c12ec92fde9 <SharedFunctionInfo fn>
 - name = 0x1c12ec92fcd1 <String[2]: fn>
 - formal_parameter_count = 1
 - kind = [ ArrowFunction ]
 - context = 0x1c12ec903cd1 <FixedArray[278]>
 - code = 0x220721125061 <Code BUILTIN>
 - interpreted
 - bytecode = 0x1c12ec930181
 - source code = (x) => x + '.'
 - properties = 0x1c12f5702241 <FixedArray[0]> {
    #length: 0x1c12e3095eb1 <AccessorInfo> (const accessor descriptor)
    #name: 0x1c12e3095f21 <AccessorInfo> (const accessor descriptor)
 }

 - feedback vector: 0x1c12ec9301f9: [FeedbackVector] in OldSpace
 - length: 1
 SharedFunctionInfo: 0x1c12ec92fde9 <SharedFunctionInfo fn>
 Optimized Code: 0
 Invocation Count: 1
 Profiler Ticks: 0
 Slot #0 BinaryOp MONOMORPHIC
  [0]: 8
0x1c12b1802361: [Map]
 - type: JS_FUNCTION_TYPE
 - instance size: 72
 - inobject properties: 0
 - elements kind: HOLEY_ELEMENTS
 - unused property fields: 0
 - enum length: invalid
 - callable
 - back pointer: 0x1c12f57022d1 <undefined>
 - instance descriptors (own) #2: 0x1c12ec9048e9 <FixedArray[8]>
 - layout descriptor: 0x0
 - prototype: 0x1c12ec904591 <JSFunction (sfi = 0x1c12f5707c91)>
 - constructor: 0x1c12f5702201 <null>
 - code cache: 0x1c12f5702241 <FixedArray[0]>
 - dependent code: 0x1c12f5702241 <FixedArray[0]>
 - construction counter: 0

(x) => x + '.'
```

Example output when feedback vector is not available:

```
d8> %DebugPrint(() => {})
DebugPrint: 0x1c12b950bf49: [Function]
 - map = 0x1c12b1802361 [FastProperties]
 - prototype = 0x1c12ec904591
 - elements = 0x1c12f5702241 <FixedArray[0]> [HOLEY_ELEMENTS]
 - initial_map =
 - shared_info = 0x1c12ec92c021 <SharedFunctionInfo>
 - name = 0x1c12f5702431 <String[0]: >
 - formal_parameter_count = 0
 - kind = [ ArrowFunction ]
 - context = 0x1c12ec903cd1 <FixedArray[278]>
 - code = 0x220721004861 <Code BUILTIN>
 - source code = () => {}
 - properties = 0x1c12f5702241 <FixedArray[0]> {
    #length: 0x1c12e3095eb1 <AccessorInfo> (const accessor descriptor)
    #name: 0x1c12e3095f21 <AccessorInfo> (const accessor descriptor)
 }

 - feedback vector: not available
0x1c12b1802361: [Map]
 - type: JS_FUNCTION_TYPE
 - instance size: 72
 - inobject properties: 0
 - elements kind: HOLEY_ELEMENTS
 - unused property fields: 0
 - enum length: invalid
 - callable
 - back pointer: 0x1c12f57022d1 <undefined>
 - instance descriptors (own) #2: 0x1c12ec9048e9 <FixedArray[8]>
 - layout descriptor: 0x0
 - prototype: 0x1c12ec904591 <JSFunction (sfi = 0x1c12f5707c91)>
 - constructor: 0x1c12f5702201 <null>
 - code cache: 0x1c12f5702241 <FixedArray[0]>
 - dependent code: 0x1c12f5702241 <FixedArray[0]>
 - construction counter: 0

() => {}
```

Change-Id: Ic80289bff652cfc8d04182c68740843c61c87849
Reviewed-on: https://chromium-review.googlesource.com/591369
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46977}

Change-Id: Iff0dcec95d04b85d31a452fed31b1500ad17a9f0
Reviewed-on: https://chromium-review.googlesource.com/591373
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46976}

Reland of https://chromium-review.googlesource.com/c/565720, fixing compilation issues on the waterfall.

Bug: 
Change-Id: Ide4f1ea4470e946820edc990c9bf027f04844efe
Reviewed-on: https://chromium-review.googlesource.com/591667Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46975}

Change-Id: Ifb689a6d5bc5290c6612a92fa45aae6f5db2d81c
Reviewed-on: https://chromium-review.googlesource.com/589433Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46974}

This file codifies the preferred editor configuration when working
on V8. Including it in the repository makes it easier for contributors
to follow the existing coding style.

See http://editorconfig.org/ for more information.

Change-Id: Iea69c29fc0d88e0fd085e4b3ffc46697d0cd1202
Reviewed-on: https://chromium-review.googlesource.com/591427Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46973}

This visitor can be reused by the full MC when seeding root items.

Bug: chromium:750084
Change-Id: I9d46ce55737961d8f72a34b06f3314c8f75f3b4d
Reviewed-on: https://chromium-review.googlesource.com/591451Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46972}

Bug: chromium:750084
Change-Id: I17560b2ab31ad494637a7498a089f4d2b7377907
Reviewed-on: https://chromium-review.googlesource.com/591450Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46971}

Also remove the comment on LayoutDescriptor as we want to pretenure
those.

Bug: chromium:738865
Change-Id: I5bdf66d383b481edc3250623e155b97d1081a7cc
Reviewed-on: https://chromium-review.googlesource.com/590235Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46970}

This reverts commit e15f5544.

Reason for revert: it breaks the GC stress. 

Original change's description:
> Changing the return address on the stack.
> 
> Rather than patching code, the deoptimizer now replaces the
> return address in the frames with respective trampolines. 
> This change required to change the way we search for Safepoint 
> entries and for Exception Handlers. 
> It's working in architectures: x64, ia32, arm, arm64 and mips. 
> 
> Bug: V8:6563
> Change-Id: I3cbd4d192c3513f307b3a6a2ac99e60d03c753d3
> Reviewed-on: https://chromium-review.googlesource.com/586707
> Commit-Queue: Juliana Patricia Vicente Franco <jupvfranco@google.com>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46967}

TBR=jarin@chromium.org,bmeurer@chromium.org,jupvfranco@google.com

Change-Id: I430fa9123beef2e0723b38cdef9537181203f7e7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: V8:6563
Reviewed-on: https://chromium-review.googlesource.com/591371
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46969}

This reverts commit d230b44f.

Reason for revert: compile errors on the waterfall

Original change's description:
> [turbofan] staging new implementation of escape analysis
> 
> Bug: 
> Change-Id: Idebe4fa6d651a404a0dc1947ed4a34a8dc9707a9
> Reviewed-on: https://chromium-review.googlesource.com/565720
> Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46966}

TBR=mstarzinger@chromium.org,jarin@chromium.org,tebbi@chromium.org

Change-Id: I73c3cb270d498aeb181e31bad04f1c73d5ca6741
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/591370Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46968}

Rather than patching code, the deoptimizer now replaces the
return address in the frames with respective trampolines. 
This change required to change the way we search for Safepoint 
entries and for Exception Handlers. 
It's working in architectures: x64, ia32, arm, arm64 and mips. 

Bug: V8:6563
Change-Id: I3cbd4d192c3513f307b3a6a2ac99e60d03c753d3
Reviewed-on: https://chromium-review.googlesource.com/586707
Commit-Queue: Juliana Patricia Vicente Franco <jupvfranco@google.com>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46967}

Bug: 
Change-Id: Idebe4fa6d651a404a0dc1947ed4a34a8dc9707a9
Reviewed-on: https://chromium-review.googlesource.com/565720
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46966}

LayoutDescriptor is currently the only case where the Scavenger needs to
potentially follow an updated slot to iterate an object. This scenario
requires at least Acq/Rel semantics.

In order to use relaxed store/load for the slots we need to allocate it
pretenured.

Bug: chromium:738865
Change-Id: I353fa6f252b436918b60fff54ece5ce5c7783072
Reviewed-on: https://chromium-review.googlesource.com/590429Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46965}

BUG=chromium:694255

Change-Id: I6684850ae9759f719e3ed665157eaea2581a65cf
Reviewed-on: https://chromium-review.googlesource.com/590008
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46964}

Add UseScratchRegisterScope for MIPS and use it instead of using at register directly.

Original commit message:
`Introduce a stripped down version of UseScratchRegisterScope for ARM and use it
inside the assembler and macro-assembler. At the exception of the Call
instructions, we now use this scope instead of using the ip register
directly. This is inspired from how the ARM64 backend works.

In general, the benefit of doing this is we can catch cases where ip is being
used both by the caller and by the assembler. But more specifically, TurboFan
reserves r9 as an extra scratch register because ip can already be used by the
assembler. With this utility, we can isolate the cases in the code generator
which need an extra register and potentially fix them, allowing us to give r9
back to the register allocator.

This patch uncovered places in the assembler where we were using ip
unconditionally when we could have re-used the destination register instead.`

Bug: 
Change-Id: I1a35c1661579882801605337abfc95f75b47f052
Reviewed-on: https://chromium-review.googlesource.com/574923
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@imgtec.com>
Reviewed-by: Ivica Bogosavljevic <ivica.bogosavljevic@imgtec.com>
Cr-Commit-Position: refs/heads/master@{#46963}

Rather than storing the isolate in compiler dispatcher jobs, which gets
weird for jobs that are entirely off-thread, instead pass the isolate
in when stepping on the main thread.

This makes it clearer which steps must be executed on the main thread,
as they require the caller to explicitly give them access to the
isolate.

Bug: v8:6537
Change-Id: I02fff7c77fdcdbfb099a38235f94d8c1040699ac
Reviewed-on: https://chromium-review.googlesource.com/589437
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46962}

With TurboFan, there should no longer be any deopt loops (aside from
bugs). So, the "too many deopts" bailout is no longer needed, at least
in its current form.

This fixes an issue where deopt counts are leaked between native
contexts, resulting in optimization being disabled unnecessarily.

Bug: v8:6402
Change-Id: Ia06374ae6b5c2d473bcdd8eef1284bf02766c2fb
Reviewed-on: https://chromium-review.googlesource.com/588894
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46961}

Intent to ship:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/0uSHjqvgAwQ/CqmFd6KNAwAJ

BUG=v8:6172

Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I50fab93516065195b4e9eea0d3be14ccf935a04f
Reviewed-on: https://chromium-review.googlesource.com/589150Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46960}

This includes the catch and finally keywords in the respective range.
For instance:

// Catch range previously:  |<--------->|
try { /* ... */ } catch (e) { /* ... */ }
// Now:           |<------------------->|

Bug: v8:6000
Change-Id: I1bd9f7fce8bb7de945da83ab512833841b9d956a
Reviewed-on: https://chromium-review.googlesource.com/586598
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46959}

Bug: v8:6239
Change-Id: I87f72cb97616e28cb44f7160d5170ff740422419
Reviewed-on: https://chromium-review.googlesource.com/584612
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46958}

Bug: v8:1956
Change-Id: Ic4c67392af2337ac35f9473073dae01264c5ac00
Reviewed-on: https://chromium-review.googlesource.com/590428Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46957}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/11685b6..ece477b

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/0f1f20d..cc7953a

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

Change-Id: Ic687cb5f878438e46a9a64d67aaa7adc8519fb62
Reviewed-on: https://chromium-review.googlesource.com/590613Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46956}

Change-Id: I8ecca14e1d65aeed59cd55626e41f9863d58be50
Reviewed-on: https://chromium-review.googlesource.com/589431
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46955}

Port 37680d65

Original Commit Message:

    Instead of having feedback vector as a subtype of FixedArray with
    reserved slots, make it a first-class variable-sized object with a
    fixed-size header. This allows us to compress counters to ints in the
    header, rather than forcing them to be Smis.

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

Change-Id: Ia835942de292c4e4b802e34672f1e8bf8a2491c7
Reviewed-on: https://chromium-review.googlesource.com/590168Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Jaideep Bajwa <bjaideep@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#46954}

Bug: None
Change-Id: I31f6c6aba48076b26971ba828411b61ed7e9bae9

Contribute by kanghua.yu@intel.com

Change-Id: I31f6c6aba48076b26971ba828411b61ed7e9bae9
Reviewed-on: https://chromium-review.googlesource.com/567861Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Pan Deng <pan.deng@intel.com>
Cr-Commit-Position: refs/heads/master@{#46953}

This reverts commit 3ca64085.

Reason: it does not seem to improve anything (including microbenchmarks
that only do "if (m.has(x)) s += m.get(x);" in a tight loop).

Bug: v8:6410
Change-Id: I025bf885f313ac5e54ca450ae9cff5b4a15b04fd
Reviewed-on: https://chromium-review.googlesource.com/574020Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46952}

Everything inside a class lives inside the class scope, so
reparenting the class scope is the only operation that
should be done to ClassLiterals during reparenting.

Bug: chromium:740591
Change-Id: Ia5b96b44ff1ca6cfa274effb5a04651809bab9bd
Reviewed-on: https://chromium-review.googlesource.com/588054
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46951}

I32x4 Mul, MinS,MaxS,MinU,MaxU, Shl,ShrS,ShrU
Rename WASM_SIMD_TEST(I32x4Min) to WASM_SIMD_TEST(I32x4MinS)

Bug: 
Change-Id: I6c721496bbf772ee734c21a3e98176699b01f890
Reviewed-on: https://chromium-review.googlesource.com/586430Reviewed-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@{#46950}

Port 79bcb454

Original Commit Message:

    This is a reland of a72b2f88
    Original change's description:
    > [arm] Restrict grouping pushes before a TailCall to registers only
    >
    > We optimize parallel moves performed before a TailCall by grouping adjacent
    > pushes. This way, we may use a single instruction to push multiple registers at
    > once. However, we also have support for pushing immediates and stack slots for
    > which the benefit is questionnable therefore this patch removes support for
    > them.
    >
    > Concerning immediate pushes, it looks like a mistake since we do not have
    > support for this case in `AssembleMove` so this patch removes it. Furthermore,
    > if we add a test for this case, we see that a `push ip` instruction is
    > generated, effectively pushing whatever was in `ip` at the time instead of
    > pushing a constant.
    >
    > Concerning stack slot pushes, we generate a more or less equivalent sequence of
    > instructions.
    >
    > Finally, grouping floating point pushes is not used anywhere so this patch
    > removes support for this also.
    >
    > Bug: v8:6553
    > Change-Id: I9b820d33361fc442dd813f66e1f96cda41009110
    > Reviewed-on: https://chromium-review.googlesource.com/567191
    > Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
    > Commit-Queue: Pierre Langlois <pierre.langlois@arm.com>
    > Cr-Commit-Position: refs/heads/master@{#46718}

R=pierre.langlois@arm.com, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: I8790c7a72f92803ea8fda3c6dc7e6b013e2e09e9
Reviewed-on: https://chromium-review.googlesource.com/588471Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Jaideep Bajwa <bjaideep@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#46949}

The approach to creating compiler dispatcher jobs for inner functions after
they had been parsed didn't provide the startup benifits we hoped for due
to the need to hold onto the whole zone memory AST while waiting for the
jobs to complete.

This CL removes the ability to create these compilation jobs (which was never
enabled by default anyway). Going forward we will potentially use the
parser task approach to parse+compile inner functions in their own job.

BUG=v8:5203

Change-Id: I63134746aa23b4aa6e3bfa17c539954890fd9b0f
Reviewed-on: https://chromium-review.googlesource.com/590007Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46948}

This CL moves us much closer to the point where we can remove debugger-script.js and usage of debugger context from inspector.
There are three main parts left:
- managing breakpoints,
- inspecting stack and scopes (this CL),
- LiveEdit.

In this CL I moved all stack/scope inspection to native. As side effect running debugger and inspector tests are 10-20% faster (it's significant since not all of tests requesting break).

R=yangguo@chromium.org,jgruber@chromium.org

Bug: chromium:652939
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I409396a687e18e9c0554c0c9c35b6e1064627be8
Reviewed-on: https://chromium-review.googlesource.com/580645Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46947}

This is preparation work to re-enable the scheduler: on arm64 some opcodes will
be neutral wrt the stack (JSSP) but will modify the underlying CSP. Identify
those opcode as such until JSSP is removed.

Bug: 
Change-Id: Iae633382c5ed38b01edaec896f2ce44d76931fc8
Reviewed-on: https://chromium-review.googlesource.com/568822Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Rodolph Perfetta <rodolph.perfetta@arm.com>
Cr-Commit-Position: refs/heads/master@{#46946}

These counters handle cases in which the catch/finally block contains a jump
statement.

Bug: v8:6000
Change-Id: Ic83f11ee431edabe61f129c9abc3adc12a79c338
Reviewed-on: https://chromium-review.googlesource.com/586595Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46945}

We must ensure required root objects will be filled when such
objects will be deserialized.

Change-Id: I25136d31cb2e0c0a69a51c5635192f17bbe2a9ba
Reviewed-on: https://chromium-review.googlesource.com/579768
Commit-Queue: Vyacheslav Chigrin <vchigrin@yandex-team.ru>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46944}

We've been passing a context to the compiler, which turns out to be
solely used to determine if we're executing in a specific cctest configuration.

This change adds a configuration to the graph builder that we can use to
explicitly opt out of stack checks and traps. CcTests default to opting out,
except for the few that don't.

Bug: 
Change-Id: I4724e31c2a62e9b3ab4feadb788287c374b39f53
Reviewed-on: https://chromium-review.googlesource.com/585779Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Mircea Trofin <mtrofin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46943}