Original issue's description:
> Use background tasks for the compiler dispatcher
>
> BUG=v8:5215
> R=marja@chromium.org,vogelheim@chromium.org
>
> Review-Url: https://codereview.chromium.org/2606263002
> Cr-Commit-Position: refs/heads/master@{#42035}
> Committed: https://chromium.googlesource.com/v8/v8/+/7a1b3a7bebbef88e72c9f7747e1930f10ee10c80

BUG=v8:5215
TBR=marja@chromium.org,vogelheim@chromium.org,rmcilroy@chromium.org

Review-Url: https://codereview.chromium.org/2613483002
Cr-Commit-Position: refs/heads/master@{#42040}

Port d3ed71ed

Original Commit Message:

    Don't fallback to the %StrictEqual / %Equal runtime functions for the
    generic CompareIC slow path, but use the (new) StrictEqual and Equal
    builtins instead. This avoids a performance cliff when mixing input
    types for strict equality sites.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:4773
LOG=N

Review-Url: https://codereview.chromium.org/2608283002
Cr-Commit-Position: refs/heads/master@{#42039}

BUG=v8:5428

Review-Url: https://codereview.chromium.org/2613463002
Cr-Commit-Position: refs/heads/master@{#42038}

Revert of Use background tasks for the compiler dispatcher (patchset #5 id:80001 of https://codereview.chromium.org/2606263002/ )

Reason for revert:
Causes IgnitionCompilerDispatcherTest.FinishNowWithBackgroundTask to fail.

https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20noi18n%20-%20debug/builds/11209

Original issue's description:
> Use background tasks for the compiler dispatcher
>
> BUG=v8:5215
> R=marja@chromium.org,vogelheim@chromium.org
>
> Review-Url: https://codereview.chromium.org/2606263002
> Cr-Commit-Position: refs/heads/master@{#42035}
> Committed: https://chromium.googlesource.com/v8/v8/+/7a1b3a7bebbef88e72c9f7747e1930f10ee10c80

TBR=marja@chromium.org,vogelheim@chromium.org,jochen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5215

Review-Url: https://codereview.chromium.org/2614433002
Cr-Commit-Position: refs/heads/master@{#42037}

BUG=v8:5428
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2602403002
Cr-Commit-Position: refs/heads/master@{#42036}

BUG=v8:5215
R=marja@chromium.org,vogelheim@chromium.org

Review-Url: https://codereview.chromium.org/2606263002
Cr-Commit-Position: refs/heads/master@{#42035}

Currently the CompileLazy builtin checks the SFI expliciltly for FCG code. This means
if the SFI has bytecode we have to go through to the runtime to install the
interpreter entry trampoline into the JSFunction object.

Modify the builtin to always put the SFI code object into the JSFunction unless it's
the lazy compile stub on the SFI as well.

BUG=v8:4380

Review-Url: https://codereview.chromium.org/2583693003
Cr-Commit-Position: refs/heads/master@{#42034}

When baselining a function using the BaselineFunctionOnNextCall intrinsic, it is
not always ensured that a function is already compiled. Update the
Runtime_BaselineFunctionOnNextCall function to trigger a compile if it is not already
compiled.

BUG=v8:5768

Review-Url: https://codereview.chromium.org/2594543003
Cr-Commit-Position: refs/heads/master@{#42033}

RCS can't be used on background threads out of the box, but ignition
already has RCS itself, so just do trace events

BUG=v8:5215
R=rmcilroy@chromium.org

Review-Url: https://codereview.chromium.org/2602383002
Cr-Commit-Position: refs/heads/master@{#42032}

Revert of [Compiler] Track Ignition background compilation separately in RuntimeStats. (patchset #3 id:80001 of https://codereview.chromium.org/2577263002/ )

Reason for revert:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/13358

Original issue's description:
> [Compiler] Track Ignition background compilation separately in RuntimeStats.
>
> Tracks background compilation of Ignition in a separate bucket from main thread
> compilation. Also add some more compilation buckets for functions which can take a
> significant proportion of compilation.
>
> BUG=v8:5203,v8:5215
>
> Review-Url: https://codereview.chromium.org/2577263002
> Cr-Commit-Position: refs/heads/master@{#42026}
> Committed: https://chromium.googlesource.com/v8/v8/+/b0e9116d59326a4f9a4f4691b61a510e342338c9

TBR=jochen@chromium.org,cbruni@chromium.org,rmcilroy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5203,v8:5215

Review-Url: https://codereview.chromium.org/2609773003
Cr-Commit-Position: refs/heads/master@{#42031}

Migrate Date.prototype.valueOf and Date.prototype[ @@toPrimitive ]
to use the CodeStubAssembler, to avoid going through C++ always
when comparing or subtracting two dates.

R=epertoso@chromium.org

Review-Url: https://codereview.chromium.org/2608143003
Cr-Commit-Position: refs/heads/master@{#42030}

(Missing includes discovered during the objects.h splitting work.)

BUG=v8:5402

Review-Url: https://codereview.chromium.org/2610643002
Cr-Commit-Position: refs/heads/master@{#42029}

Call the %DateCurrentTime runtime function directly instead, which is
cheaper than calling the C++ builtin.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2612513003
Cr-Commit-Position: refs/heads/master@{#42028}

BUG=v8:5428

Review-Url: https://codereview.chromium.org/2606273002
Cr-Commit-Position: refs/heads/master@{#42027}

Tracks background compilation of Ignition in a separate bucket from main thread
compilation. Also add some more compilation buckets for functions which can take a
significant proportion of compilation.

BUG=v8:5203,v8:5215

Review-Url: https://codereview.chromium.org/2577263002
Cr-Commit-Position: refs/heads/master@{#42026}

The heap traversal for SFI code objects when logging compiled functions
was previously accessing the abstract code of an SFI, logging its
bytecode if it exists or code object otherwise. However, there are some
(rare) cases where an SFI has both bytecode and a non-interpreter code
object -- for example, after baseline tier-up -- in which case we want
to log both, as both could be executing (at different points on the
stack).

BUG=v8:5758

Review-Url: https://codereview.chromium.org/2603333002
Cr-Commit-Position: refs/heads/master@{#42025}

Changes some for loops to use node->inputs() instead of iterating over
InputCount and accessing InputAt(i). This saves some checks for
"has_inline_inputs" and so some branches.

Review-Url: https://codereview.chromium.org/2585713002
Cr-Commit-Position: refs/heads/master@{#42024}

Revert of [turbofan] fix another divergence in escape analysis (patchset #1 id:1 of https://codereview.chromium.org/2599793002/ )

Reason for revert:
Caused memory corruption.

BUG=chromium:676767

Original issue's description:
> [turbofan] fix another divergence in escape analysis
>
> This divergence bug is very similar to the one fixed in https://codereview.chromium.org/2522253002/, this time it is an oscillation between a cleared field and a new phi node. The page http://www.sears.com/clothing-shoes-jewelry-clothing-men-s-clothing-men-s-jeans/b-1325287370?Brand=LEE&filterList=Brand&sortOption=UNITS_HIGH_TO_LOW allows for a reliable reproduction.
>
> This fix makes sure that once a field that generated a phi gets cleared, it always stays cleared.
>
> BUG=chromium:670202
>
> R=bmeurer@chromium.org
>
> Review-Url: https://codereview.chromium.org/2599793002
> Cr-Commit-Position: refs/heads/master@{#41922}
> Committed: https://chromium.googlesource.com/v8/v8/+/8435cc852672c504d5899cc2765c5b895e658efe

TBR=bmeurer@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:670202

Review-Url: https://codereview.chromium.org/2611623002
Cr-Commit-Position: refs/heads/master@{#42023}

BUG=

Review-Url: https://codereview.chromium.org/2609833003
Cr-Commit-Position: refs/heads/master@{#42022}

Don't fallback to the %StrictEqual / %Equal runtime functions for the
generic CompareIC slow path, but use the (new) StrictEqual and Equal
builtins instead. This avoids a performance cliff when mixing input
types for strict equality sites.

R=jochen@chromium.org
BUG=v8:4773

Review-Url: https://codereview.chromium.org/2609153002
Cr-Commit-Position: refs/heads/master@{#42021}

  port 05873add (r41989)

  original commit message:
  The following ported to builtins:
  FastCloneRegExp
  FastCloneShallowArray
  FastCloneShallowObject

BUG=

Review-Url: https://codereview.chromium.org/2607383002
Cr-Commit-Position: refs/heads/master@{#42020}

  port f2e8c978 (r41988)

  original commit message:

BUG=

Review-Url: https://codereview.chromium.org/2603313002
Cr-Commit-Position: refs/heads/master@{#42019}

  port 5b02a98b (r41986)

  original commit message:
  In the process, convert from a code stub into a builtin.

BUG=

Review-Url: https://codereview.chromium.org/2608203002
Cr-Commit-Position: refs/heads/master@{#42018}

  port be11812c (r41971)

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

BUG=

Review-Url: https://codereview.chromium.org/2612503002
Cr-Commit-Position: refs/heads/master@{#42017}

The ControlEquivalence cannot deal with new nodes inserted by the
Scheduler due to Node splitting. Rather when the ControlEquivalence
sees such a new Node, it'll likely crash on an out-of-bounds access.

This is a speculative fix to make the crash disappear, as there's no
100% reliable repro currently.

BUG=chromium:629398
TBR=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2611603002
Cr-Commit-Position: refs/heads/master@{#42016}

Hook up TurboFan with the existing field type tracking machinery to
eliminate redundant map checks on the results of LoadField operators.
The store side is already implemented in TurboFan for quite some time,
this just adds the load part.

R=jarin@chromium.org
BUG=v8:5267

Review-Url: https://codereview.chromium.org/2604393002
Cr-Commit-Position: refs/heads/master@{#42015}

- Adds CodeAssembler::ConstructJS() to simplify calling JS functions as
constructors, used by NewPromiseCapability()
- Defines PromiseCapability as a special JSObject subclass, with a
non-exensible Map, and read-only non-configurable DataDescriptors which
point to its in-object fields. This allows its fields to be used by JS
builtins until there is no longer any need.

Currently, the performance benefit comes from
https://codereview.chromium.org/2567033003/, but does not appear to
regress performance in any significant way.

BUG=v8:5343
TBR=ulan@chromium.org

Review-Url: https://codereview.chromium.org/2567333002
Cr-Commit-Position: refs/heads/master@{#42014}

Review-Url: https://codereview.chromium.org/2571903004
Cr-Commit-Position: refs/heads/master@{#42013}

R=jarin@chromium.org
BUG=v8:5428

Review-Url: https://codereview.chromium.org/2611523002
Cr-Commit-Position: refs/heads/master@{#42012}

We need to report cached wrappers within v8 to the embedder after each atomic
phase of v8 marking because the embedder can invalidate the wrappers in-between
v8 marking steps.

E.g., in Chrome, a conservative GC might need to wipe dead wrappables from
the wrapper tracing marking deque.

BUG=chromium:676700, chromium:468240

Review-Url: https://codereview.chromium.org/2610563002
Cr-Commit-Position: refs/heads/master@{#42011}

Store maps on the CheckMaps operator instead of burning inputs for
the individual maps. Use the same data structure (the ZoneHandleSet)
in the LoadElimination to track multiple maps per object.

BUG=v8:5267
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2431563002
Cr-Commit-Position: refs/heads/master@{#42010}

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}