Chromium tests were prepared in https://codereview.chromium.org/1118743003/ and https://codereview.chromium.org/1135493002/.
Blink tests in https://codereview.chromium.org/1115193002/

LOG=Y
BUG=chromium:480652
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1127363002

Cr-Commit-Position: refs/heads/master@{#28295}

NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1136443002

Cr-Commit-Position: refs/heads/master@{#28294}

TBR=machenbach@chromium.org
NOTREECHECKS=true

Review URL: https://codereview.chromium.org/1130183002

Cr-Commit-Position: refs/heads/master@{#28293}

This introduces V8.MemoryHeapCommitted and V8.MemoryHeapUsed histograms.

In contrast to the existing memory histograms, the new histograms are uniform in time, i.e. their samples happen at regular time intervals. The --histogram-interval specifies the length of the interval.

We implement this by linearly interpolating memory stats between GC and idle notification events.

BUG=chromium:485472
LOG=NO

Review URL: https://codereview.chromium.org/1125683004

Cr-Commit-Position: refs/heads/master@{#28292}

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/1130783002

Cr-Commit-Position: refs/heads/master@{#28291}

Cr-Commit-Position: refs/heads/master@{#28290}

Rolling v8/tools/clang to 52a578929068131eb73e907fdd6e2600e0d3180c

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1133463003

Cr-Commit-Position: refs/heads/master@{#28289}

Revert of Use CLOCK_REALTIME_COARSE when available. (patchset #3 id:40001 of https://codereview.chromium.org/1125003002/)

Reason for revert:
[Sheriff] This causes layout test crashes:
http://build.chromium.org/p/client.v8/builders/V8-Blink%20Linux%2064%20%28dbg%29/builds/2735

You can add the trybot v8_linux_layout_dbg on reland.

Original issue's description:
> Use CLOCK_REALTIME_COARSE when available.
>
> On systems that have CLOCK_REALTIME_COARSE with good enough resolution, we can
> avoid making a system call to get the current time; it's serviced from the vDSO.
>
> BUG=
> LOG=N
>
> Committed: https://crrev.com/537ed7500c087786f28f51ff5222f1c2113776d3
> Cr-Commit-Position: refs/heads/master@{#28280}

TBR=jochen@chromium.org,deanm@chromium.org,bmeurer@chromium.org,ben@strongloop.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1130083003

Cr-Commit-Position: refs/heads/master@{#28288}

Revert of Revert of Wrap runtime.js in a function. (patchset #1 id:1 of https://codereview.chromium.org/1123353004/)

Reason for revert:
Failing test has been fixed.

Original issue's description:
> Revert of Wrap runtime.js in a function. (patchset #2 id:20001 of https://codereview.chromium.org/1126213002/)
>
> Reason for revert:
> [Sheriff] Breaks nosnap:
> http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap/builds/2872
>
> Original issue's description:
> > Wrap runtime.js in a function.
> >
> > R=jkummerow@chromium.org
> >
> > Committed: https://crrev.com/65c56d49b2d671ac9e379de726bff3eb03a508c1
> > Cr-Commit-Position: refs/heads/master@{#28275}
>
> TBR=jkummerow@chromium.org,yangguo@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
>
> Committed: https://crrev.com/62bd294f909ff448d0f876a3d745966a24cdc3f7
> Cr-Commit-Position: refs/heads/master@{#28277}

TBR=jkummerow@chromium.org,machenbach@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1131843002

Cr-Commit-Position: refs/heads/master@{#28287}

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1132493002

Cr-Commit-Position: refs/heads/master@{#28286}

Revert of Remove Scope::scope_uses_this_ flag (patchset #1 id:1 of https://codereview.chromium.org/1129823002/)

Reason for revert:
The reason for reverting is: [Sheriff] Need to fix compilation after this revert:
https://chromium.googlesource.com/v8/v8/+/5cab6be83a44567a3ee5747d728a399025d38411

Original issue's description:
> Remove Scope::scope_uses_this_ flag
>
> Use of the "this" variable is now tracked using scopes, like any other variable.
>
> R=arv@chromium.org
> LOG=N
> BUG=
>
> Committed: https://crrev.com/afba55965118d9ba57e53c729f52be2340e626e0
> Cr-Commit-Position: refs/heads/master@{#28268}

TBR=arv@chromium.org,wingo@igalia.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1131713004

Cr-Commit-Position: refs/heads/master@{#28285}

Revert of Remove Scope::scope_uses_arguments_ flag (patchset #1 id:1 of https://codereview.chromium.org/1124233002/)

Reason for revert:
[Sheriff] Need to fix compilation after this revert:
https://chromium.googlesource.com/v8/v8/+/5cab6be83a44567a3ee5747d728a399025d38411

Original issue's description:
> Remove Scope::scope_uses_arguments_ flag
>
> Use of arguments is tracked as a variable, like any other variable.
>
> R=arv@chromium.org
> LOG=N
> BUG=
>
> Committed: https://crrev.com/d4ea33f480243fb5b7d2cca6edddcaa3e9478e29
> Cr-Commit-Position: refs/heads/master@{#28271}

TBR=arv@chromium.org,wingo@igalia.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1134453002

Cr-Commit-Position: refs/heads/master@{#28284}

Revert of Resolve references to "this" the same way as normal variables (patchset #2 id:20001 of https://codereview.chromium.org/1130733003/)

Reason for revert:
[Sheriff] Breaks jetstream benchmark with errors like this:

>>> Running suite: JetStream/bigfib.cpp
>>> Stdout (#1):
undefined:93: ReferenceError: this is not defined
  this['Module'] = Module;
  ^
ReferenceError: this is not defined
    at eval (eval at __run (runner.js:13:3), <anonymous>:93:3)
    at eval (native)
    at __run (runner.js:13:3)
    at Object.runSimpleBenchmark (runner.js:44:31)
    at runner.js:97:13

Original issue's description:
> Resolve references to "this" the same way as normal variables
>
> Make the parser handle references to "this" as unresolved variables, so the
> same logic as for the rest of function parameters is used for the receiver.
> Minor additions to the code generation handle copying the receiver to the
> context, along with the rest of the function parameters.
>
> Based on work by Adrian Perez de Castro <aperez@igalia.com>.
>
> BUG=v8:2700
> LOG=N
>
> Committed: https://crrev.com/06a792b7cc2db33ffce7244c044a9c05afbb6116
> Cr-Commit-Position: refs/heads/master@{#28263}

TBR=rossberg@chromium.org,arv@chromium.org,wingo@igalia.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:2700

Review URL: https://codereview.chromium.org/1129723003

Cr-Commit-Position: refs/heads/master@{#28283}

NOTRY=true
TBR=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/1130123002

Cr-Commit-Position: refs/heads/master@{#28282}

Allows for getting rid of the special casing for float64 and is probably
faster.

BUG=v8:3996
R=verwaest@chromium.org,dslomov@chromium.org,plind44@gmail.com
LOG=n

Review URL: https://codereview.chromium.org/1128433006

Cr-Commit-Position: refs/heads/master@{#28281}

On systems that have CLOCK_REALTIME_COARSE with good enough resolution, we can
avoid making a system call to get the current time; it's serviced from the vDSO.

BUG=
LOG=N

Review URL: https://codereview.chromium.org/1125003002

Cr-Commit-Position: refs/heads/master@{#28280}

port 7798548a (r28260)

original commit message:

    typeof was implemented as a runtime function. Calling it in
    optimized code with a non-constant input becomes burdensome.

BUG=

Review URL: https://codereview.chromium.org/1124263005

Cr-Commit-Position: refs/heads/master@{#28279}

port 06a792b7 (r28263).

original commit message:

    Make the parser handle references to "this" as unresolved variables, so the
    same logic as for the rest of function parameters is used for the receiver.
    Minor additions to the code generation handle copying the receiver to the
    context, along with the rest of the function parameters.

    Based on work by Adrian Perez de Castro <aperez@igalia.com>

BUG=

Review URL: https://codereview.chromium.org/1124393002

Cr-Commit-Position: refs/heads/master@{#28278}

Revert of Wrap runtime.js in a function. (patchset #2 id:20001 of https://codereview.chromium.org/1126213002/)

Reason for revert:
[Sheriff] Breaks nosnap:
http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap/builds/2872

Original issue's description:
> Wrap runtime.js in a function.
>
> R=jkummerow@chromium.org
>
> Committed: https://crrev.com/65c56d49b2d671ac9e379de726bff3eb03a508c1
> Cr-Commit-Position: refs/heads/master@{#28275}

TBR=jkummerow@chromium.org,yangguo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1123353004

Cr-Commit-Position: refs/heads/master@{#28277}

R=jochen@chromium.org
BUG=chromium:485155
LOG=y

Review URL: https://codereview.chromium.org/1124293002

Cr-Commit-Position: refs/heads/master@{#28276}

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1126213002

Cr-Commit-Position: refs/heads/master@{#28275}

BUG=chromium:436911
LOG=n

Review URL: https://codereview.chromium.org/1130833002

Cr-Commit-Position: refs/heads/master@{#28274}

Port 7798548a

Original commit message:
typeof was implemented as a runtime function. Calling it in
optimized code with a non-constant input becomes burdensome.

R=mvstanton@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1124243002

Cr-Commit-Position: refs/heads/master@{#28273}

Port 18619d35

Original commit message:
Make the parser handle references to "this" as unresolved variables, so the
same logic as for the rest of function parameters is used for the receiver.
Minor additions to the code generation handle copying the receiver to the
context, along with the rest of the function parameters.

Based on work by Adrian Perez de Castro <aperez@igalia.com>.

R=wingo@igalia.com, dstence@us.ibm.com,  michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1129803003

Cr-Commit-Position: refs/heads/master@{#28272}

Use of arguments is tracked as a variable, like any other variable.

R=arv@chromium.org
LOG=N
BUG=

Review URL: https://codereview.chromium.org/1124233002

Cr-Commit-Position: refs/heads/master@{#28271}

BUG=v8:4007
LOG=N
R=arv@chromium.org, rossberg@chromium.org

Review URL: https://codereview.chromium.org/548833002

Cr-Commit-Position: refs/heads/master@{#28270}

Port cf53fed9

Original commit message:
ArgumentsAdaptorStub for derived constructor (the one that needs
new.target) works in this way:
 - If the constructor is invoked via the Construct stub, we know that
   actual arguments always include new.target. ``arguments`` object
   however should not include a new.target, therefore we remove it.
   We achieve this by decrementing the argument count.
 - If the constructor is invoked as a call, we do not care for a correct
   ``arguments`` array since the constructor will immediately throw on
   entrance.
The bug is that the call could actually pass 0 actual arguments, but I
decrement unconditionally :(. The fix is to detect this case and avoid
decrementing. ``arguments`` is bogus, but it is ok as constructor
throws.

Long-term we should just remove mucking about with arguments for
new.target and just get it from the stack.

R=dslomov@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1125223002

Cr-Commit-Position: refs/heads/master@{#28269}

Use of the "this" variable is now tracked using scopes, like any other variable.

R=arv@chromium.org
LOG=N
BUG=

Review URL: https://codereview.chromium.org/1129823002

Cr-Commit-Position: refs/heads/master@{#28268}

BUG=chromium:436911
LOG=n

Review URL: https://codereview.chromium.org/1128923002

Cr-Commit-Position: refs/heads/master@{#28267}

https://codereview.chromium.org/1125783002 did not handle all cases for some
architectures. These cases are now covered, and tests have been extended to
check them.

BUG=v8:4073
LOG=N

Review URL: https://codereview.chromium.org/1128143002

Cr-Commit-Position: refs/heads/master@{#28266}

Revert of New insertion write barrier. (patchset #3 id:200001 of https://codereview.chromium.org/1073953006/)

Reason for revert:
Various performance regressions.

Original issue's description:
> New insertion write barrier.
>
> BUG=
>
> Committed: https://crrev.com/6e9e2c08292b553602c74b16b8ccff4e4ccac003
> Cr-Commit-Position: refs/heads/master@{#28199}

TBR=ulan@chromium.org,erikcorry@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1131583002

Cr-Commit-Position: refs/heads/master@{#28265}

BUG=
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1116943002

Cr-Commit-Position: refs/heads/master@{#28264}

Make the parser handle references to "this" as unresolved variables, so the
same logic as for the rest of function parameters is used for the receiver.
Minor additions to the code generation handle copying the receiver to the
context, along with the rest of the function parameters.

Based on work by Adrian Perez de Castro <aperez@igalia.com>.

BUG=v8:2700
LOG=N

Review URL: https://codereview.chromium.org/1130733003

Cr-Commit-Position: refs/heads/master@{#28263}

BUG=chromium:436911

Review URL: https://codereview.chromium.org/1127993002

Cr-Commit-Position: refs/heads/master@{#28262}

I know the bug has been closed but this seems like a simple addition that may
be useful in other ways as well.

BUG=v8:2180
LOG=N

Review URL: https://codereview.chromium.org/1128553002

Cr-Commit-Position: refs/heads/master@{#28261}

typeof was implemented as a runtime function. Calling it in
optimized code with a non-constant input becomes burdensome.

BUG=

Review URL: https://codereview.chromium.org/1114563003

Cr-Commit-Position: refs/heads/master@{#28260}

This revives the Terminate operator and removes the weird Always
operator. As a first step we let the ControlReducer connect non
terminating loops via Terminate. The next step will be to change the
graph builder to insert Terminate nodes into every loop.

Review URL: https://codereview.chromium.org/1123213002

Cr-Commit-Position: refs/heads/master@{#28259}

Make sure all lists are either regularly cleared or trimmed

R=hpayer@chromium.org
BUG=none
LOG=n

Review URL: https://codereview.chromium.org/1123213003

Cr-Commit-Position: refs/heads/master@{#28258}

R=hpayer@chromium.org, erikcorry@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1105693002

Cr-Commit-Position: refs/heads/master@{#28257}

R=yangguo@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1130723002

Cr-Commit-Position: refs/heads/master@{#28256}