Original issue's description:
> Disable the CompilerDispatcher if we don't have idle time
>
> Since we can't do all steps on background threads, we need idle time to
> work
>
> BUG=v8:5215
> R=danno@chromium.org
>
> Review-Url: https://codereview.chromium.org/2600743002
> Cr-Commit-Position: refs/heads/master@{#41944}
> Committed: https://chromium.googlesource.com/v8/v8/+/a0d9eb346bba90aa0b32a
2d3184cbbfd6adb243e

BUG=v8:5215

Review-Url: https://codereview.chromium.org/2606233002
Cr-Commit-Position: refs/heads/master@{#42009}

Add machinery to Ignition and TurboFan to collect and consume
InternalizedString feedback for abstract and strict equality
comparisons. Here we can turn the comparison into a simple
pointer equality check.

R=jarin@chromium.org
BUG=v8:5786

Review-Url: https://codereview.chromium.org/2609013002
Cr-Commit-Position: refs/heads/master@{#42008}

R=marja@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2606223002
Cr-Commit-Position: refs/heads/master@{#42007}

R=marja@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2580833005
Cr-Commit-Position: refs/heads/master@{#42006}

When Crankshaft compiles a keyed load to arguments, it disabled
optimization unless the KEYED_LOAD_IC for the access was monomorphic.
But that's too restrictive, since it will also disable optimization
for this function when the access is on a path that was never executed
so far.

This was spotted in the Node.js core function EventEmitter.prototype.emit,
which was no longer optimizable with Crankshaft using latest V8.

R=jarin@chromium.org
BUG=v8:5790

Review-Url: https://codereview.chromium.org/2607303002
Cr-Commit-Position: refs/heads/master@{#42005}

This patch fixes OOM crash that happens for large heap where
the total size of edges exceeds 2GB, which is the hard limit
for v8::internal::List allocated using tcmalloc.

BUG=chromium:675911

Review-Url: https://codereview.chromium.org/2595003002
Cr-Commit-Position: refs/heads/master@{#42004}

R=epertoso@chromium.org
BUG=5428

Review-Url: https://codereview.chromium.org/2607243002
Cr-Commit-Position: refs/heads/master@{#42003}

Following in the footsteps of the other load/store ICs.

R=epertoso@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2608893002
Cr-Commit-Position: refs/heads/master@{#42002}

This CL is from danno@chromium.org. Moves code stubs

LoadIC
KeyedLoadICTF
StoreIC
KeyedStoreICTF
LoadICTrampoline
KeyedLoadICTrampolineTF
StoreICTrampoline
KeyedStoreICTrampolineTF

into builtins.

TBR Yang for serializer changes.

R=epertoso@chromium.org
TBR=yangguo@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2608883002
Cr-Commit-Position: refs/heads/master@{#42001}

This refactors the logic from within the FastNewObject TF_BUILTIN to a
helper method which can be reused in other assemblers. This saves the
overhead of setting up the stub and calling into it.

A wrapper method is created for functions that don't need to tail call
into the runtime.

PromiseBuiltinsAssembler and RegexpBuiltinsAssembler are refactored to
use EmitFastNewObject.

Review-Url: https://codereview.chromium.org/2607233002
Cr-Commit-Position: refs/heads/master@{#42000}

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2602903005
Cr-Commit-Position: refs/heads/master@{#41999}

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/1e8a2ca..9ddf248

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

Review-Url: https://codereview.chromium.org/2601373002
Cr-Commit-Position: refs/heads/master@{#41998}

R=adamk@chromium.org
BUG=v8:5343

Review-Url: https://codereview.chromium.org/2608843002
Cr-Commit-Position: refs/heads/master@{#41997}

Port 05873add
Port f2e8c978

Original commit message:

    The following ported to builtins:
    FastCloneRegExp
    FastCloneShallowArray
    FastCloneShallowObject

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

Review-Url: https://codereview.chromium.org/2603003002
Cr-Commit-Position: refs/heads/master@{#41996}

R=adamk@chromium.org, caitp@igalia.com
BUG=v8:5343

Review-Url: https://codereview.chromium.org/2603033002
Cr-Commit-Position: refs/heads/master@{#41995}

This looks like it was leftover from strong mode; default class
constructors are always in strict mode.

R=littledan@chromium.org

Review-Url: https://codereview.chromium.org/2601123002
Cr-Commit-Position: refs/heads/master@{#41994}

Cr-Commit-Position: refs/heads/master@{#41993}

Port 5b02a98b

Original Commit Message:

    In the process, convert from a code stub into a builtin.

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

Review-Url: https://codereview.chromium.org/2601243003
Cr-Commit-Position: refs/heads/master@{#41992}

This patch stores the promise, resolve, reject properties of the
deferred object created by CreateInternalPromiseCapability and
NewPromiseCapability directly on the promise (if the promise hasn't
been fulfilled), otherwise they are stored on the
PromiseReactionJobInfo.

This patch removes the currently unused
CreateInternalPromiseCapability and inlines the call to create the
deferred promise object.

NewPromiseCapability is the only function that works with a deferred.

This patch results in a 8.5% improvement in benchmarks over 5 runs.

BUG=v8:5343

Review-Url: https://codereview.chromium.org/2590563003
Cr-Commit-Position: refs/heads/master@{#41991}

Cr-Commit-Position: refs/heads/master@{#41990}

The following ported to builtins:
FastCloneRegExp
FastCloneShallowArray
FastCloneShallowObject

BUG=
TBR=rmcilroy@chromium.org, rossberg@chromium.org

Review-Url: https://codereview.chromium.org/2605893002
Cr-Commit-Position: refs/heads/master@{#41989}

BUG=
TBR=rmcilroy@chromium.org

Review-Url: https://codereview.chromium.org/2604833004
Cr-Commit-Position: refs/heads/master@{#41988}

BUG=
R=epertoso@chromium.org

Review-Url: https://codereview.chromium.org/2602903004
Cr-Commit-Position: refs/heads/master@{#41987}

In the process, convert from a code stub into a builtin.

Review-Url: https://codereview.chromium.org/2606733002
Cr-Commit-Position: refs/heads/master@{#41986}

R=mvstanton@chromium.org
TBR=rmcilroy@chromium.org

Review-Url: https://codereview.chromium.org/2608683002
Cr-Commit-Position: refs/heads/master@{#41985}

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/d79b0df..432074b

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

Review-Url: https://codereview.chromium.org/2601243002
Cr-Commit-Position: refs/heads/master@{#41984}

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

Review-Url: https://codereview.chromium.org/2605113002
Cr-Commit-Position: refs/heads/master@{#41983}

Add test as well.
Add regression test for passing uninitialized promises to init hook

BUG=v8:4643

Review-Url: https://codereview.chromium.org/2578173004
Cr-Commit-Position: refs/heads/master@{#41982}

Section 3.2 of the C++ standard states that destructor definitions
implicitly "use" operator delete functions. Therefore, these operator
delete functions must be defined even if they are never called by
user code explicitly.
http://www.open-std.org/JTC1/SC22/WG21/docs/cwg_defects.html#261

gcc allows them to remain as empty definitions. However, not all
compilers allow this. (e.g. xlc on zOS)

This pull request creates definitions which if ever called, result
in an abort.

R=danno@chromium.org,jochen@chromium.org
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2588433002
Cr-Commit-Position: refs/heads/master@{#41981}

Cr-Commit-Position: refs/heads/master@{#41980}

We currently use BitcastTaggedToWord only in from the code assemblers to verify the correctness of the operation.

BUG=

Review-Url: https://codereview.chromium.org/2605073002
Cr-Commit-Position: refs/heads/master@{#41979}

In fast-allocate, the path that leverages Add Mem-Imm fails to take
into account that the allocation size may be adjusted by kDoubleSize/2
for alignment.  Limit this instruction to 64-bit only.

Also guard PFDs with the proper facility check.
R=jyan@ca.ibm.com, michael_dawson@ca.ibm.com, bjaideep@ca.ibm.com
BUG=

Review-Url: https://codereview.chromium.org/2605063002
Cr-Commit-Position: refs/heads/master@{#41978}

R=ishell@chromium.org
LOG=N

Review-Url: https://codereview.chromium.org/2608433003
Cr-Commit-Position: refs/heads/master@{#41977}

Before this patch, loops in deferred code would defeat the propagation of the
deferred flag, since back edges would usually not come from deferred blocks,
thus stoping the forward propagation of the deferred flag at loop headers. This
patch ensures that back edges are ignored in the deferred propations, properly
placing loops dominated by deferred labels and the code that follows them into
deferred code.

R=epertoso@chromium.org
LOG=N

Review-Url: https://codereview.chromium.org/2606923002
Cr-Commit-Position: refs/heads/master@{#41976}

Instead of loading the address both the limit and top pointers, rely on the
property that the limit pointer is always directly after the top pointer so that
it can be loaded with the limit pointer's address plus a fixed offset.

This generates smaller code and reduces the number of registers required by the
allocation sequence by one.

LOG=N
R=epertoso@chromium.org

Review-Url: https://codereview.chromium.org/2605043002
Cr-Commit-Position: refs/heads/master@{#41975}

Before this patch, Loads generated in the CSA on x64 that have a zero offset
displacement will add a zero to the effective address rather than using an
addressing mode that folds away the zero.

This functionality already exists on ia32, but the port wasn't purely mechanical
so it hadn't been done on x64.

R=epertoso@chromium.org
LOG=N

Review-Url: https://codereview.chromium.org/2602893002
Cr-Commit-Position: refs/heads/master@{#41974}

... and add explicit CallPrologue/CallEpilogue callbacks to CodeAssemblerState instead.
This will allow IntepreterAssembler to use any other helper assembler.

TBR=rmcilroy@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2600183004
Cr-Commit-Position: refs/heads/master@{#41973}

Specifically, don't propage "needs_frame" up through non-deferred -> deferred
block transitions where there are multiple edges from the non-deferred to
deferred code.

LOG=N
R=epertoso@chromium.org

Review-Url: https://codereview.chromium.org/2606893002
Cr-Commit-Position: refs/heads/master@{#41972}

Recognize and emit in-memory comparisons of 8-bit and 16-bit values with
immediate values that fit.

LOG=N
R=epertoso@chromium.org

Review-Url: https://codereview.chromium.org/2605863002
Cr-Commit-Position: refs/heads/master@{#41971}

This aids in TurboFan concurrent compilation, a general good.

TBR for Ross, on vacation...

TBR=rmcilroy@chromium.org

BUG=

Review-Url: https://codereview.chromium.org/2607563002
Cr-Commit-Position: refs/heads/master@{#41970}