The previous JavaScript version created way too many ConsStrings for
longer strings, i.e. when using String.fromCharCode together with
Function.prototype.apply and arrays of char codes.

This version now always allocates sequential strings and therefore uses
way less memory when turning longer character sequences into strings,
and therefore fixes the memory regression on Google Maps.

BUG=chromium:609831
R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2004733002
Cr-Commit-Position: refs/heads/master@{#36427}

This patch changes the disassembly output for ARM64 when tracing
compiled code. We used to omit printing the encoding as opposed to what
ARM and X64 do. The new turbolizer tool assumes the encoding is printed
and gets confused otherwise.

This could have been fixed in the tool instead but making disassembly
output consistent across architecture seems like a better solution.

BUG=

Review-Url: https://codereview.chromium.org/1996983003
Cr-Commit-Position: refs/heads/master@{#36426}

BUG=chromium:613796
LOG=N

Review-Url: https://codereview.chromium.org/2002813002
Cr-Commit-Position: refs/heads/master@{#36425}

Rolling v8/build to 298aeabfe2aa544f7be8cab05a133428bca7dea3

Rolling v8/third_party/icu to 54f86bb1d1d02968576d21c16d7134ec35c30fbc

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

Review-Url: https://codereview.chromium.org/2005633002
Cr-Commit-Position: refs/heads/master@{#36424}

This unifies the calculation of virtual offsets within the escape
analysis pass to go through common helpers. It also switches to safer
accessors for getting FieldAccess and ElementAccess parameters.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2000733002
Cr-Commit-Position: refs/heads/master@{#36423}

combination of LoadByte/Shift/Or and StoreByte/Shift/And.

BUG=

Review-Url: https://codereview.chromium.org/1928513002
Cr-Commit-Position: refs/heads/master@{#36422}

R=rmcilroy@chromium.org
BUG=v8:4907,v8:5027

Review-Url: https://codereview.chromium.org/1995303002
Cr-Commit-Position: refs/heads/master@{#36421}

In case of calling 'toLocaleString', 'toLocaleTimeString' and
'toLocaleDateString' functions of 'Date' with empty 'locales' and
'options', DateTimeFormat is cached inside 'defaultObjects'.
If we change the timezone the cache is not invalidated.

BUG=v8:5022
TEST=cctest:DateCacheVersion. See the bug
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_noi18n_rel_ng

Review-Url: https://codereview.chromium.org/1985423003
Cr-Commit-Position: refs/heads/master@{#36420}

Review-Url: https://codereview.chromium.org/1996373002
Cr-Commit-Position: refs/heads/master@{#36419}

Rather than bake foreign globals into the module
at compile time, add a __foreign_init__ function that can be called
after instantiation with foreign values gathers using keys
in a separately generated FixedArray.

This is an incremental step towards being able to enable asm->wasm
on for general traffic, behind a flag.

BUG= https://bugs.chromium.org/p/v8/issues/detail?id=4203
TEST=asm-wasm
R=titzer@chromium.org,aseemgarg@chromium.org
LOG=N

Review-Url: https://codereview.chromium.org/1999523002
Cr-Commit-Position: refs/heads/master@{#36418}

Crankshaft shouldn't try to inline functions it knows it can't handle.

BUG=v8:5033

Review-Url: https://codereview.chromium.org/2000703002
Cr-Commit-Position: refs/heads/master@{#36417}

R=cbruni@chromium.org

Review-Url: https://codereview.chromium.org/1996333002
Cr-Commit-Position: refs/heads/master@{#36416}

At the moment the code assumes C-function returns the address of the
struct with the values. Unfortunately, the arm ABI does not guarantee that.
After this CL, we do not assume that, and instead just take the value from the stack.

BUG=chromium:611885
LOG=n

Review-Url: https://codereview.chromium.org/2000713002
Cr-Commit-Position: refs/heads/master@{#36415}

Revert of [keys] Don't omit write barrier after std::sort (patchset #2 id:20001 of https://codereview.chromium.org/1991173002/ )

Reason for revert:
This array only contains Smis, see its only store site five lines above:

array->set(array_size++, Smi::FromInt(i));

If you want to improve something here, use a C++ array instead of a FixedArray. There's no reason to have this short-lived list on the V8 heap.

Original issue's description:
> [keys] Don't omit write barrier after std::sort
>
> BUG=
>
> Committed: https://crrev.com/681ac8979e820d147380b5fdb2aae773e22f1302
> Cr-Commit-Position: refs/heads/master@{#36412}

TBR=mlippautz@chromium.org,cbruni@chromium.org
# 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/1996963002
Cr-Commit-Position: refs/heads/master@{#36414}

Revert of [turbofan] Take the immediate size in account when narrowing ia32/x64 word comparison operators. (patchset #1 id:1 of https://codereview.chromium.org/1968453002/ )

Reason for revert:
Breaks a KCS demo:

BUG=chromium:611976

Original issue's description:
> [turbofan] Take the immediate size in account when narrowing ia32/x64 word comparison operators.
>
> Trying to re-land http://crrev.com/1948453002 after fixing assembler-x64.cc in http://crrev.com/1962563003.
>
> Before this patch, we would emit a cmp or test with a memory operand only if both of the operands in the IR were loads. Now if either of them is a load and the other one is an immediate, we can use a memory operand if the load representation machine size is wide enough to represent the latter.
>
> Committed: https://crrev.com/2da70f853d7f680d491c37c72d5ef04a85497ba9
> Cr-Commit-Position: refs/heads/master@{#36136}

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

Review-Url: https://codereview.chromium.org/1995303003
Cr-Commit-Position: refs/heads/master@{#36413}

BUG=

Review-Url: https://codereview.chromium.org/1991173002
Cr-Commit-Position: refs/heads/master@{#36412}

BUG=chromium:613518
LOG=n

Review-Url: https://codereview.chromium.org/1999743002
Cr-Commit-Position: refs/heads/master@{#36411}

- Move usable functions into proper heap-utils.h/.cc files and remove
  utils-inl.h file
- Fix assumptions accross the board relying on certain behavior that is not
  invariant

This is a requirement for modifying page size.

BUG=chromium:581412
LOG=N
R=ulan@chromium.org

Review-Url: https://codereview.chromium.org/1999753002
Cr-Commit-Position: refs/heads/master@{#36410}

R=cbruni@chromium.org

Review-Url: https://codereview.chromium.org/1994183002
Cr-Commit-Position: refs/heads/master@{#36409}

In VisitArrayLiteral(), we stopped creating boilerplates during
 compilation. This created a bug, because we'd emit an HStoreKeyed with an
 ElementsKind based on the initial elements kind of the boilerplate. Since
 boilerplates may transition as part of elements transition feedback, this can
 lead to incorrect values (storing a smi in a double array).

BUG=chromium:606021

Review-Url: https://codereview.chromium.org/2000673002
Cr-Commit-Position: refs/heads/master@{#36408}

Instead of dynamically creating semaphore for each page parallel job,
we create one semaphore for MarkCompact and reuse it.

This patch also removes all instrumentation code that was added to
help with investigation.

BUG=chromium:609249
LOG=NO

Review-Url: https://codereview.chromium.org/1998213002
Cr-Commit-Position: refs/heads/master@{#36407}

Review-Url: https://codereview.chromium.org/2003513002
Cr-Commit-Position: refs/heads/master@{#36406}

BUG=v8:4483
R=littledan@chromium.org, hpayer@chromium.org, mstarzinger@chromium.org, ulan@chromium.org

Review-Url: https://codereview.chromium.org/1992093003
Cr-Commit-Position: refs/heads/master@{#36405}

For now we treat simplified ObjectIsFoo operators as escaping uses when
it comes to escape analysis. Eventually we want to handle them in the
associated reducer, just like we do with ObjectIsSmi.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2002573002
Cr-Commit-Position: refs/heads/master@{#36404}

Revert of Refactor script position calculation (patchset #3 id:40001 of https://codereview.chromium.org/2003483002/ )

Reason for revert:
Crashes gc stress with custom snapshot:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/5763

Original issue's description:
> Refactor script position calculation
>
> Script position calculation logic (i.e. line & column numbers for a
> given code position) is now based on a single method
> Script::GetPositionInfo(). Refactored related code in isolate.cc and
> js/messages.js to use the new method. The line_ends accessor is still
> in use by chromium and thus cannot be removed yet.
>
> R=yangguo@chromium.org
> BUG=
>
> Committed: https://crrev.com/2f3879d54633c4076d38e9fc85b6e2e157c61548
> Cr-Commit-Position: refs/heads/master@{#36398}

TBR=yangguo@chromium.org,jgruber@chromium.org,jgruber@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/1995323002
Cr-Commit-Position: refs/heads/master@{#36403}

 - Lane indices are no longer required to be integers. Add index coersion for loads/stores
 - Give shift operators masking shift count semantics
 - Throw type/range errors instead of runtime asserts.

BUG=v8:4963
LOG=N

R=bbudge@chromium.org, bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/1965443003
Cr-Commit-Position: refs/heads/master@{#36402}

Also change parser to insert %_GeneratorClose instead of %GeneratorClose.
Full-codegen generators will fall back to the runtime function.

BUG=v8:4907

Review-Url: https://codereview.chromium.org/1993073003
Cr-Commit-Position: refs/heads/master@{#36401}

This adds support to materialize JSFunction objects from deoptimization
information. By now we need to support this because TurboFan's escape
analysis can produce virtual (i.e. non-escaping) closures.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/1998143002
Cr-Commit-Position: refs/heads/master@{#36400}

NOTRY=true
TBR=mtrofin@chromium.org

Review-Url: https://codereview.chromium.org/1996923002
Cr-Commit-Position: refs/heads/master@{#36399}

Script position calculation logic (i.e. line & column numbers for a
given code position) is now based on a single method
Script::GetPositionInfo(). Refactored related code in isolate.cc and
js/messages.js to use the new method. The line_ends accessor is still
in use by chromium and thus cannot be removed yet.

R=yangguo@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2003483002
Cr-Commit-Position: refs/heads/master@{#36398}

Revert of [ESNext] Activate async/await for ClusterFuzz (patchset #1 id:1 of https://codereview.chromium.org/1992173002/ )

Reason for revert:
First CF feedback is in, reverting for now until the know bugs are fixed.

Original issue's description:
> [ESNext] Activate async/await for ClusterFuzz
>
> BUG=v8:4483
> R=neis@chromium.org,littledan@chromium.org,caitpotter88@gmail.com
> LOG=N
>
> Committed: https://crrev.com/c57cadfa09fa493141bf43c1c7b898187a71da19
> Cr-Commit-Position: refs/heads/master@{#36362}

TBR=littledan@chromium.org,caitpotter88@gmail.com,neis@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4483

Review-Url: https://codereview.chromium.org/2003503002
Cr-Commit-Position: refs/heads/master@{#36397}

  port f241a61a (r36360)

  original commit message:
  We cannot tier up from interpreted to baseline code when there is an
  activation of the function on the stack. This significantly regresses
  the performance of recursive functions since they are unlikely to get
  tiered up.

  This CL adds the ability for a function to be marked for baseline
  compilation when it returns. To do this we patch the
  InterpreterEntryTrampoline return address to point to
  InterpreterMarkBaselineOnReturn, which leaves the
  interpreted frame and recompile the function for
  baseline.

  This improves the score of EarlyBoyer by ~8x for Ignition.

BUG=

Review-Url: https://codereview.chromium.org/1998153002
Cr-Commit-Position: refs/heads/master@{#36396}

Introduce three new JS operators in Turbofan:
- JSGeneratorStore is used in implementing Ignition's SuspendGenerator bytecode.
- JSGeneratorRestoreContinuation and JSGeneratorRestoreRegister are used in
  implementing Ignition's ResumeGenerator bytecode.

Remove the runtime functions that were used to implement these bytecodes before.

BUG=v8:4907

Review-Url: https://codereview.chromium.org/1991203002
Cr-Commit-Position: refs/heads/master@{#36395}

BUG=

Review-Url: https://codereview.chromium.org/1993233002
Cr-Commit-Position: refs/heads/master@{#36394}

BUG=

Review-Url: https://codereview.chromium.org/1992153002
Cr-Commit-Position: refs/heads/master@{#36393}

R=jochen@chromium.org, verwaest@chromium.org

Review-Url: https://codereview.chromium.org/1922603006
Cr-Commit-Position: refs/heads/master@{#36392}

Review-Url: https://codereview.chromium.org/1998103002
Cr-Commit-Position: refs/heads/master@{#36391}

This patch re-lands #36341 with another fix to make
the amd64-generic build work as well.

R=machenbach@chromium.org, hablich@chromium.org, adamk@chromium.org
BUG=608596, 595653
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:chromeos_daisy_chromium_compile_only_ng,chromeos_amd64-generic_chromium_compile_only_ng,chromeos_x86-generic_chromium_compile_only_ng,linux_chromium_gn_chromeos_rel,linux_chromium_gn_chromeos_dbg

Review-Url: https://codereview.chromium.org/1996513005
Cr-Commit-Position: refs/heads/master@{#36390}

... introduced in https://codereview.chromium.org/1782743003/

TBR=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/1998093002
Cr-Commit-Position: refs/heads/master@{#36389}

  port 78b1585f (r36355)

  original commit message:

BUG=

Review-Url: https://codereview.chromium.org/1998013002
Cr-Commit-Position: refs/heads/master@{#36388}