Changes include:
 - Adding V8_EXPORT macro for SnapshotCreator
 - Removing outdated DCHECKs.
 - Allow nullptr as external reference. This required a...
 - Refactoring of hashmaps used by the serializer.
 - Remove external references for counters. These are not used
   anywhere for isolates that are being serialized.
 - Put template infos into the partial snapshot cache.
 - Remove unnecessary presubmit check for external references.
   mksnapshot crashes if external references are missing.

R=jochen@chromium.org, vogelheim@chromium.org
BUG=chromium:617892

Review-Url: https://codereview.chromium.org/2490783004
Cr-Commit-Position: refs/heads/master@{#40949}

TestBit sets cr0 therefore need to pass that to the
branch instruction.
This got exposed with testcase added in CL
https://codereview.chromium.org/2497573003/

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

Review-Url: https://codereview.chromium.org/2495853003
Cr-Commit-Position: refs/heads/master@{#40948}

Port 1915762c

Original commit message:

    These JavaScript operators were special hacks to ensure that we always
    operate on Smis for the magic for-in index variable, but this never
    really worked in the OSR case, because the OsrValue for the index
    variable didn't have the proper information (that we have for the
    JSForInPrepare in the non-OSR case).

    Now that we have loop induction variable analysis and binary operation
    hints, we can just use JSLessThan and JSAdd instead with appropriate
    Smi hints, which handle the OSR case by inserting Smi checks (that are
    always true). Thanks to OSR deconstruction and loop peeling these Smi
    checks will be hoisted so they don't hurt the OSR case too much.

    Drive-by-change: Rename the ForInDone bytecode to ForInContinue, since
    we have to lower it to JSLessThan to get the loop induction variable
    goodness.

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

Review-Url: https://codereview.chromium.org/2502503002
Cr-Commit-Position: refs/heads/master@{#40947}

BUG=v8:5561

Review-Url: https://codereview.chromium.org/2488673004
Cr-Commit-Position: refs/heads/master@{#40946}

Several weeks have now passed since it was deprecated; Chromium does not
call it.

BUG=chromium:148757

Review-Url: https://codereview.chromium.org/2478863002
Cr-Commit-Position: refs/heads/master@{#40945}

That way we don't have to update the perf tests whenever the exact
configuration changes.

R=mvstanton@chromium.org,hablich@chromium.org,danno@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2420053002
Cr-Commit-Position: refs/heads/master@{#40944}

BUG=chromium:148757

Review-Url: https://codereview.chromium.org/2492943002
Cr-Commit-Position: refs/heads/master@{#40943}

BUG=v8:5051
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

Review-Url: https://codereview.chromium.org/2484223004
Cr-Commit-Position: refs/heads/master@{#40942}

- Creates a new promise-utils.{h, cc} which refactors out the
logic to create resolving functions. This is shared between the
runtime functions and builtins.

- Changes PromiseResolveThenableJobInfo to store the context
since we no longer create the resolving functions in JS.

- Changes EnqueuPromiseResolveThenableJob to take in the promise and
  not the callbacks.

BUG=v8:5343

Review-Url: https://codereview.chromium.org/2487053002
Cr-Commit-Position: refs/heads/master@{#40941}

Review-Url: https://codereview.chromium.org/2491373003
Cr-Commit-Position: refs/heads/master@{#40940}

- Adds VmovExtended, VswpExtended methods to MacroAssembler. These methods
use only VFP registers to perform s-register moves.

LOG=N
BUG=v8:4124

Review-Url: https://codereview.chromium.org/2497483002
Cr-Commit-Position: refs/heads/master@{#40939}

Review-Url: https://codereview.chromium.org/2494993002
Cr-Commit-Position: refs/heads/master@{#40938}

Previous: https://codereview.chromium.org/2491773006

BUG=v8:5512

Review-Url: https://codereview.chromium.org/2498643002
Cr-Commit-Position: refs/heads/master@{#40937}

GetSharedFunctionInfo will compile inner functions if we get the
compile-eager hint, even if the shared function info already exists, and
the function already has been compiled. This breaks suspended generator
objects.

R=mstarzinger@chromium.org, neis@chromium.org
BUG=v8:5575

Review-Url: https://codereview.chromium.org/2494043002
Cr-Commit-Position: refs/heads/master@{#40936}

BUG=chromium:651354

Review-Url: https://codereview.chromium.org/2493803002
Cr-Commit-Position: refs/heads/master@{#40935}

R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/2492713005
Cr-Commit-Position: refs/heads/master@{#40934}

This CL removes the ParseInfo argument from FetchFreeVariables, since it seems
to have become unnecessary.

R=verwaest@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2491373004
Cr-Commit-Position: refs/heads/master@{#40933}

Methods in the runtime that enumerate over properties should never deal with private symbols. Most commonly such methods only loop over enumerable properties. This fix avoids accidentally handling private symbols in methods that only deal with enumerable properties. Methods that need to look at non-enumerable properties as well still have to manually filter private symbols (e.g., the KeyAccumulator).

BUG=chromium:664411

Review-Url: https://codereview.chromium.org/2499593002
Cr-Commit-Position: refs/heads/master@{#40932}

BUG=v8:5614

Review-Url: https://codereview.chromium.org/2496913002
Cr-Commit-Position: refs/heads/master@{#40931}

Fixes incorrect checks for handle validity when checking the compiled
code, as well as incorrect uses of tst in arm and ppc flag checking
code. Also adds a test that the tier-up works correctly.

Reland of https://codereview.chromium.org/2448933002

BUG=v8:5512

Review-Url: https://codereview.chromium.org/2497573003
Cr-Commit-Position: refs/heads/master@{#40930}

BUG=v8:5561

Review-Url: https://codereview.chromium.org/2489433003
Cr-Commit-Position: refs/heads/master@{#40929}

BUG=chromium:648973, chromium:648568

Review-Url: https://codereview.chromium.org/2493083003
Cr-Commit-Position: refs/heads/master@{#40928}

BUG=v8:5614

Review-Url: https://codereview.chromium.org/2481013010
Cr-Commit-Position: refs/heads/master@{#40927}

Revert of [compiler] Enable shared function marking by default (patchset #1 id:1 of https://codereview.chromium.org/2491773006/ )

Reason for revert:
Revert because it depends on https://codereview.chromium.org/2478323002/ which has been reverted.

Original issue's description:
> [compiler] Enable shared function marking by default
>
> BUG=v8:5512

TBR=bmeurer@chromium.org,leszeks@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5512

Review-Url: https://codereview.chromium.org/2491643006
Cr-Commit-Position: refs/heads/master@{#40926}

R=ulan@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2493173003
Cr-Commit-Position: refs/heads/master@{#40925}

ToName conversion, i.e., ToPropertykey() is the
identify for strings and symbols.

BUG=v8:5623

Review-Url: https://codereview.chromium.org/2494073002
Cr-Commit-Position: refs/heads/master@{#40924}

This adds a new ExternalPointer type, which is an Internal type that is
used for ExternalReferences and other pointer values, like the pointers
into the asm.js heap. It also adds a PointerConstant operator, which we
use to represents these raw constants (we can probably remove that
particular operator again once WebAssembly ships with the validator).

R=mvstanton@chromium.org
BUG=v8:5267,v8:5270

Review-Url: https://codereview.chromium.org/2494753003
Cr-Commit-Position: refs/heads/master@{#40923}

According to the spec data segments are allowed even if the memory size
is zero. However, if one of the data segments has a length greater than
0, then module instantiation should fail.

I also changed the exception type in LoadDataSegments to TypeError,
because that's the exception type for all exceptions which can happen
during instantiation.

R=titzer@chromium.org, rossberg@chromium.org
TEST=cctest/test-run-wasm-module/EmptyMemoryEmptyDataSegment, cctest/test-run-wasm-module/EmptyMemoryNonEmptyDataSegment

Review-Url: https://codereview.chromium.org/2483053005
Cr-Commit-Position: refs/heads/master@{#40922}

A SmiUntag() was missing when loading the old backing store's length.

BUG=chromium:664469

Review-Url: https://codereview.chromium.org/2492783004
Cr-Commit-Position: refs/heads/master@{#40921}

BUG=v8:5512

Review-Url: https://codereview.chromium.org/2491773006
Cr-Commit-Position: refs/heads/master@{#40920}

Revert of [compiler] Fix flipped boolean checks in marked tier-up (patchset #7 id:120001 of https://codereview.chromium.org/2478323002/ )

Reason for revert:
Breaks deopt fuzzer:
https://build.chromium.org/p/client.v8/builders/V8%20Deopt%20Fuzzer/builds/14872/steps/Deopt%20Fuzz%20on%20Ubuntu-12.04/logs/stdio

Original issue's description:
> [compiler] Fix flipped boolean checks in marked tier-up
>
> Fixes incorrect checks for handle validity when checking the compiled
> code, as well as incorrect uses of tst in arm and ppc flag checking
> code. Also adds a test that the tier-up works correctly.

TBR=rmcilroy@chromium.org,leszeks@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2492523007
Cr-Commit-Position: refs/heads/master@{#40919}

BUG=v8:5614

Review-Url: https://codereview.chromium.org/2493183002
Cr-Commit-Position: refs/heads/master@{#40918}

This CL adds support for:
* conditional breaks in setBreakpoint,
* locals in frame.local{Count,Name,Value},
* evaluation on a frame in frame.evaluate,
* and more detailed scope information in scopeObject.

Uses of several functions that are not covered by the
inspector protocol and are only used in tests have been removed.

Local handling has been modified to also include arguments as locals.
Inspector differs in this regard from our FrameDetails in that
arguments are always shown as locals. Argument-related functions
were removed.

BUG=v8:5530

Review-Url: https://codereview.chromium.org/2491543002
Cr-Commit-Position: refs/heads/master@{#40917}

BUG=v8:5614

Review-Url: https://codereview.chromium.org/2493173002
Cr-Commit-Position: refs/heads/master@{#40916}

Fixes incorrect checks for handle validity when checking the compiled
code, as well as incorrect uses of tst in arm and ppc flag checking
code. Also adds a test that the tier-up works correctly.

Review-Url: https://codereview.chromium.org/2478323002
Cr-Commit-Position: refs/heads/master@{#40915}

BUG=v8:5614

Review-Url: https://codereview.chromium.org/2492793005
Cr-Commit-Position: refs/heads/master@{#40914}

This CL moves all heap-allocated WASM data structures, both ones
that are bonafide JSObjects and ones that are FixedArrays only, into a
consistent place with consistent layout. Note that not all accessors are complete, and I haven't fully spread the new static typing goodness
to all places in the code.

R=ahaas@chromium.org,rossberg@chromium.org
CC=gdeepti@chromium.org,mtrofin@chromium.org,clemensh@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2490663002
Cr-Commit-Position: refs/heads/master@{#40913}

And decouple hydrogen-instructions.h from code-stubs.h. This avoids
all of Crankshaft being recompiled when code-stub-assembler.h changes.

Review-Url: https://codereview.chromium.org/2498563002
Cr-Commit-Position: refs/heads/master@{#40912}

This enables the on-stack replacement mechanism from Ignition bytecode
to TurboFan optimized code by default. The runtime profiler is now
allowed to arm OSR points in bytecode.

R=rmcilroy@chromium.org

Review-Url: https://codereview.chromium.org/2432413004
Cr-Commit-Position: refs/heads/master@{#40911}

Fast case the monomorphic case, by marking the additional checks as deferred
blocks. This increases the code size by about 50 bytes, but the monmorphic
case requires one fewer jump and the all the code is contiguous, so may help
caching.

Also cleanup call and new bytecode handlers by changing some of the Branches
to GotoIf/Unless for better readability.

BUG=v8:4280

Review-Url: https://codereview.chromium.org/2487573005
Cr-Commit-Position: refs/heads/master@{#40910}