The DataView constructor calls into C++ anyway, and is easier to deal
with this way, especially since we don't have the half initialized
object floating through JavaScript.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1712163002

Cr-Commit-Position: refs/heads/master@{#34145}

This should restore the splay regression.

BUG=

Review URL: https://codereview.chromium.org/1714753003

Cr-Commit-Position: refs/heads/master@{#34144}

This CL also enhances a "tail-call-megatest" which now tests product of the following cases:
1) tail caller is inlined/not-inlined
2) tail callee is inlined/not-inlined
3) tail caller has an arguments adaptor frame above or not
4) tail callee has an arguments adaptor frame above or not
5) tail callee is a sloppy/strict/possibly eval/bound/proxy function
6) tail calling via normal call/function.apply/function.call

BUG=v8:4698
LOG=N

Review URL: https://codereview.chromium.org/1711863002

Cr-Commit-Position: refs/heads/master@{#34143}

R=verwaest@chromium.org
LOG=y
BUG=none

Review URL: https://codereview.chromium.org/1711833002

Cr-Commit-Position: refs/heads/master@{#34142}

In theory, we could connect the nodes when doing
the schedule-in-the-middle pass, but that would require creating two
versions of the operator (effectful and pure). I believe we do not
lose anything by wiring the node up eagerly.

Review URL: https://codereview.chromium.org/1709093002

Cr-Commit-Position: refs/heads/master@{#34141}

Reland of Sampling heap profiler data structure changes (patchset #1 id:1 of https://codereview.chromium.org/1708363002/ )

Reason for revert:
Failure keeps lurking around after the revert. I'll reland, sorry for the inconvenience!

Original issue's description:
> Revert of Sampling heap profiler data structure changes (patchset #10 id:180001 of https://codereview.chromium.org/1697903002/ )
>
> Reason for revert:
> [Sheriff] Speculative revert for cpu profiler crashes on chromebooks:
> https://build.chromium.org/p/client.v8/builders/V8%20Arm%20-%20debug/builds/549
> https://build.chromium.org/p/client.v8/builders/V8%20Arm%20-%20debug/builds/550
>
> Original issue's description:
> > Sampling heap profiler data structure changes
> >
> > Previously, the sampling heap profiler stored a list of samples and then
> > built a tree representation when the profile was queried by calling
> > GetAllocationProfile. This change reduces duplication by removing stacks
> > from all samples. Also, less information is stored in the tree
> > maintained by the profiler and remaining information (script name, line
> > no, etc) is resolved when a profile is requested.
> >
> > BUG=
> >
> > Committed: https://crrev.com/cdd55e2a3717723492d76f66810bf56b8de7f198
> > Cr-Commit-Position: refs/heads/master@{#34119}
>
> TBR=ofrobots@google.com,ulan@chromium.org,hpayer@chromium.org,mattloring@google.com
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=
>
> Committed: https://crrev.com/4578e52aefb8c4727742ce2e254613e482fdad1f
> Cr-Commit-Position: refs/heads/master@{#34128}

TBR=ofrobots@google.com,ulan@chromium.org,hpayer@chromium.org,mattloring@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.

Review URL: https://codereview.chromium.org/1714493003

Cr-Commit-Position: refs/heads/master@{#34140}

This reducer doesn't really add value, because:

 (a) it is only concerned with JSCallFunction and JSToNumber, but when
     we get to it, all JSCallFunction nodes will have been replaced by
     Call nodes, and in the not so far future, we will also have
     replaced almost all JSToNumber nodes with better code,
 (b) and the reducer tries to be smart and use one of the outermost
     contexts, but that might not be beneficial always; actually it
     might even create longer live ranges and lead to more spilling
     in some cases.

But most importantly, the JSContextRelaxation currently blocks inlining
based on SharedFunctionInfo, because it requires the inliner to check
the native context, which in turn requires JSFunction knowledge. So I'm
removing this reducer for now to unblock the more important inliner
changes.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1715633002

Cr-Commit-Position: refs/heads/master@{#34139}

No need to limit JSCreate inlining to JS_OBJECT_TYPE, since we can
handle everything that the FastNewObjectStub can deal with. Also we
don't need to restrict the number of inobject properties, as that is
already taken care of by the runtime anyways (limited by the initial
slack for the constructor).

And last but not least, we can of course inline allocations for
subclasses as long as the new.target is a JSFunction and it's initial
map's constructor points back to the target (same condition as for
the FastNewObjectStub fast case).

R=jarin@chromium.org
BUG=v8:4493
LOG=n

Review URL: https://codereview.chromium.org/1711883003

Cr-Commit-Position: refs/heads/master@{#34138}

Review URL: https://codereview.chromium.org/1712563002

Cr-Commit-Position: refs/heads/master@{#34137}

Move the already existing fast case for %NewObject into a dedicated
FastNewObjectStub that we can utilize in places where we would otherwise
fallback to %NewObject immediately, which is rather expensive.

Also use FastNewObjectStub as the generic implementation of JSCreate,
which should make constructor inlining based on SharedFunctionInfo (w/o
specializing to a concrete closure) viable soon.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1708313002

Cr-Commit-Position: refs/heads/master@{#34136}

Ideally the JSInliner should not be concerned with JSFunction's at all,
but only look at the SharedFunctionInfo. This reduces the uses of the
concrete closure to two remaining cases, which we plan to fix soonish
too.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1714803002

Cr-Commit-Position: refs/heads/master@{#34135}

  port 55071954 (r34114)

  original commit message:
  Frame slots indexes numbers are used more consistently for
  computation in both TurboFan and Crankshaft. Specifically,
  Crankshaft now uses frame slot indexes in LChunk, removing
  the need for some special-case maths when building the
  deoptimization translation table.

BUG=

Review URL: https://codereview.chromium.org/1714763002

Cr-Commit-Position: refs/heads/master@{#34134}

Rolling v8/tools/clang to b194e7fa21cc99980e38ff8b29740e78134fcfce

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

Review URL: https://codereview.chromium.org/1712993002

Cr-Commit-Position: refs/heads/master@{#34133}

Various syntactic forms now cause functions to have names where they
didn't before. Per the upcoming changes to the toString spec, only
a name that was literally part of a function's expression or declaration
is meant to be reflected in toString. This also happens to be the same
set of names that V8 currently outputs (without the --harmony-function-name
flag).

This required distinguishing anonymous FunctionExpressions from other sorts
of function definitions (like methods and getters/setters) in the AST, parser,
and at runtime.

The patch also takes the opportunity to remove one more argument (and enum)
from FunctionLiteral, as well as adding a special factory method for the
case of a FunctionLiteral representing toplevel or eval'd code.

BUG=v8:4760
LOG=n

Review URL: https://codereview.chromium.org/1712833002

Cr-Commit-Position: refs/heads/master@{#34132}

In ES2015, Date.prototype.toGMTString is simply an alias of
Date.prototype.toUTCString, so it has the same identity as a function and
doesn't have its own name. Firefox has already shipped this behavior.
Previously, we copied JSC behavior by making it a separate function.
This change makes an addition test262 test pass.

BUG=v8:4708
LOG=Y
R=adamk

Review URL: https://codereview.chromium.org/1709373002

Cr-Commit-Position: refs/heads/master@{#34131}

Port 187b3f28

BUG=

Review URL: https://codereview.chromium.org/1709793002

Cr-Commit-Position: refs/heads/master@{#34130}

Revert of Use displayName in Error.stack rendering if present. (patchset #1 id:1 of https://codereview.chromium.org/1706823003/ )

Reason for revert:
See Domenic's comment on the V8 bug.

Original issue's description:
> Use displayName in Error.stack rendering if present.
>
> BUG=v8:4761
> LOG=y
>
> Committed: https://crrev.com/953874e974037e7e96ef282a7078760ccc905878
> Cr-Commit-Position: refs/heads/master@{#34105}

TBR=jochen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4761

Review URL: https://codereview.chromium.org/1713663002

Cr-Commit-Position: refs/heads/master@{#34129}

Revert of Sampling heap profiler data structure changes (patchset #10 id:180001 of https://codereview.chromium.org/1697903002/ )

Reason for revert:
[Sheriff] Speculative revert for cpu profiler crashes on chromebooks:
https://build.chromium.org/p/client.v8/builders/V8%20Arm%20-%20debug/builds/549
https://build.chromium.org/p/client.v8/builders/V8%20Arm%20-%20debug/builds/550

Original issue's description:
> Sampling heap profiler data structure changes
>
> Previously, the sampling heap profiler stored a list of samples and then
> built a tree representation when the profile was queried by calling
> GetAllocationProfile. This change reduces duplication by removing stacks
> from all samples. Also, less information is stored in the tree
> maintained by the profiler and remaining information (script name, line
> no, etc) is resolved when a profile is requested.
>
> BUG=
>
> Committed: https://crrev.com/cdd55e2a3717723492d76f66810bf56b8de7f198
> Cr-Commit-Position: refs/heads/master@{#34119}

TBR=ofrobots@google.com,ulan@chromium.org,hpayer@chromium.org,mattloring@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1708363002

Cr-Commit-Position: refs/heads/master@{#34128}

Fix comment.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:4678
LOG=N

Review URL: https://codereview.chromium.org/1714503002

Cr-Commit-Position: refs/heads/master@{#34127}

Port 55071954

Original commit message:
    Frame slots indexes numbers are used more consistently for
    computation in both TurboFan and Crankshaft. Specifically,
    Crankshaft now uses frame slot indexes in LChunk, removing
    the need for some special-case maths when building the
    deoptimization translation table.

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

Review URL: https://codereview.chromium.org/1710073002

Cr-Commit-Position: refs/heads/master@{#34126}

This frees up one bit in FunctionKind, which I plan to make slightly
more syntactic info about functions available in SharedFunctionInfo
(needed for ES2015 Function.name support).

BUG=v8:3956, v8:4760
LOG=n

Review URL: https://codereview.chromium.org/1704223002

Cr-Commit-Position: refs/heads/master@{#34125}

Synthetic names for wasm-to-js functions, for debug scenarios.

BUG=

Review URL: https://codereview.chromium.org/1709893002

Cr-Commit-Position: refs/heads/master@{#34124}

This cleans up and makes the tests easier to write and understand.
Also prepares for adding the WASM interpreter which needs a
different initialization sequence in tests.

R=ahaas@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1707403002

Cr-Commit-Position: refs/heads/master@{#34123}

This isolates all files necessary to run jsfunfuzz. The fuzz
harness is copied into the jsfunfuzz directory and will be
deleted in the old location after the migration to swarming.

BUG=chromium:535160
LOG=n
NOTRY=true

Review URL: https://codereview.chromium.org/1706223002

Cr-Commit-Position: refs/heads/master@{#34122}

I extended the Int64Lowering to lower calls, loads, stores, returns, and
parameters and apply the lowering on both the test function TF graph and
the WasmRunner TF graph.

The lowering of calls also requires an adjustment of the call descriptor.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1704033002

Cr-Commit-Position: refs/heads/master@{#34121}

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1704373002 .

Cr-Commit-Position: refs/heads/master@{#34120}

Previously, the sampling heap profiler stored a list of samples and then
built a tree representation when the profile was queried by calling
GetAllocationProfile. This change reduces duplication by removing stacks
from all samples. Also, less information is stored in the tree
maintained by the profiler and remaining information (script name, line
no, etc) is resolved when a profile is requested.

BUG=

Review URL: https://codereview.chromium.org/1697903002

Cr-Commit-Position: refs/heads/master@{#34119}

BUG=

Review URL: https://codereview.chromium.org/1704353002

Cr-Commit-Position: refs/heads/master@{#34118}

BUG=v8:4698
LOG=N

Review URL: https://codereview.chromium.org/1710883002

Cr-Commit-Position: refs/heads/master@{#34117}

On swarming, we need to be able to pass the location of the
archive, so that it ends up in swarming's outdir.

BUG=chromium:535160
LOG=n
NOTRY=true

Review URL: https://codereview.chromium.org/1706203002

Cr-Commit-Position: refs/heads/master@{#34116}

BUG=v8:4698
LOG=N

Review URL: https://codereview.chromium.org/1713533002

Cr-Commit-Position: refs/heads/master@{#34115}

Frame slots indexes numbers are used more consistently for
computation in both TurboFan and Crankshaft. Specifically,
Crankshaft now uses frame slot indexes in LChunk, removing
the need for some special-case maths when building the
deoptimization translation table.

LOG=N
R=mstarzinger@chromium.org

Committed: https://crrev.com/81423b84dbb2eaf7e1a57b0f6029fc8e643b4755
Cr-Commit-Position: refs/heads/master@{#34078}

Review URL: https://codereview.chromium.org/1702593002

Cr-Commit-Position: refs/heads/master@{#34114}

Moves the accumulator value on-heap to be restored in the
InterpreterNotifyDeopt handler rather than explicitly
setting the accumulator register. This allows it to be
materialized correctly if required.

BUG=v8:4678
LOG=N

Review URL: https://codereview.chromium.org/1707133003

Cr-Commit-Position: refs/heads/master@{#34113}

Port 2166bd8c

BUG=

Review URL: https://codereview.chromium.org/1708853002

Cr-Commit-Position: refs/heads/master@{#34112}

Implements iterator finalisation by desugaring for-of loops with an additional try-finally wrapper. See comment in parser.cc for details.

Also improved some AST printing facilities while there.

@Ross, I had to disable the bytecode generation test for for-of, because it got completely out of hand after this change (the new bytecode has 150+ lines). See the TODO that I assigned to you.

Patch set 1 is WIP patch by Georg (http://crrev.com/1695583003), patch set 2 relative changes.

@Georg, FYI, I changed the following:

- Moved try-finally out of the loop body, for performance, and in order to be able to handle `continue` correctly.
- Fixed scope management in ParseForStatement, which was the cause for the variable allocation failure.
- Fixed pre-existing zone initialisation bug in rewriter, which caused the crashes.
- Enabled all tests, adjusted a few others, added a couple more.

BUG=v8:2214
LOG=Y

Review URL: https://codereview.chromium.org/1695393003

Cr-Commit-Position: refs/heads/master@{#34111}

This also ports a few changes from run-test.py to make sure
cwd = v8 root directory.

BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1707963003

Cr-Commit-Position: refs/heads/master@{#34110}

  Unstructured control flow caused by excpetion leads to a wrong x87 FPU stack
  state in TurboFan's exception handler.

  This patch is to reset the x87 FPU stack state when calling the TurboFan's exception
  handler from the CEntryStub.

BUG=

Review URL: https://codereview.chromium.org/1702383005

Cr-Commit-Position: refs/heads/master@{#34109}

In case when F inlined normal call to G which tail calls H we should not write translation for G for the tail call site.
Otherwise we will see G in a stack trace inside H.

This CL also adds a "megatest" which tests product of the following cases:
1) tail caller is inlined/not-inlined
2) tail callee is inlined/not-inlined
3) tail caller has an arguments adaptor frame above or not
4) tail callee has an arguments adaptor frame above or not
5) tail callee is a normal/bound/proxy function

Note that tests for not yet supported cases are not run for now.

BUG=v8:4698
LOG=N

Review URL: https://codereview.chromium.org/1709583002

Cr-Commit-Position: refs/heads/master@{#34108}

The BufferedRawMachineAssemblerTester caused problems for the
Int64Lowering. Instead we construct a TF graph now which is compiled by
Pipeline::GenerateCodeForTesting.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1702023002

Cr-Commit-Position: refs/heads/master@{#34107}

This downloads a patched version of jsfunfuzz from google
storage (google internal bucket) as a hook on demand.

Similar to the gcmole approach from
https://codereview.chromium.org/1703533002/

BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1706963005

Cr-Commit-Position: refs/heads/master@{#34106}