The MLS instruction is available in all ARMv7 devices, and in no ARMv6
devices, aside from the usual ARMv6T2 caveat. We don't need a separate
feature flag for it.

BUG=

Review-Url: https://codereview.chromium.org/1988133004
Cr-Commit-Position: refs/heads/master@{#36378}

- Removing null checks as we always have the CodeRange object (it might be
  invalid, but it's there)
- Account for reserved area (Win64) in SetUp so we the caller doesn't need to be
  aware of it

R=ulan@chromium.org

Review-Url: https://codereview.chromium.org/1991253002
Cr-Commit-Position: refs/heads/master@{#36377}

port 78b1585f

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

Review-Url: https://codereview.chromium.org/1993273002
Cr-Commit-Position: refs/heads/master@{#36376}

R=joransiu@ca.ibm.com,michael_dawson@ca.ibm.com,mbrandy@us.ibm.com,jyan@ca.ibm.com

BUG=

Review-Url: https://codereview.chromium.org/1993063002
Cr-Commit-Position: refs/heads/master@{#36375}

Assembler::db() could start a trampoline pool at wrong pc position.

TEST: mjsunit/asm/embenchen/zlib

BUG=

Review-Url: https://codereview.chromium.org/1994143002
Cr-Commit-Position: refs/heads/master@{#36374}

Define the ELF e_machine field for ARM64, enabling --perf-prof.

BUG=

Review-Url: https://codereview.chromium.org/1992263002
Cr-Commit-Position: refs/heads/master@{#36373}

Removed wrapper functions.

BUG=

Review-Url: https://codereview.chromium.org/1994963002
Cr-Commit-Position: refs/heads/master@{#36372}

use_icu_data_file from //third_party/icu should be used.
//third_party/icu also defines ICU_UTIL_DATA_IMPL.

BUG=chromium:610673,chromium:474921

Review-Url: https://codereview.chromium.org/1996033002
Cr-Commit-Position: refs/heads/master@{#36371}

Previously, CodeStubAssembler macros performing FixedArray element accesses had
to compute offsets to elements explicitly with a fair amount of duplicated
code. Furthermore, any peephole optimizations that could produce better code--
like recognizing constant indices or combining array index computation with Smi
untagging--were also duplicated.

This change factors the code to compute FixedArray index offsets into a common
routine in the CodeStubAssembler that applies standard peephole optimizations to
all accesses. In order to do this, it also introduces limited introspection into
the up-until-now opaque Node* type exported from code-assembler.h, allowing
Nodes to be queried whether they are constant and extracting their constant
value in that case.

Review-Url: https://codereview.chromium.org/1989363004
Cr-Commit-Position: refs/heads/master@{#36370}

Revert of [test] add tests for async function stacktraces (patchset #1 id:1 of https://codereview.chromium.org/1995723004/ )

Reason for revert:
Breaks gc stress:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/3575

Original issue's description:
> [test] add tests for async function stacktraces
>
> BUG=v8:4483
> R=littledan@chromium.org
>
> Committed: https://crrev.com/02f228eccdfcfab4081c2494ade52e54702b692c
> Cr-Commit-Position: refs/heads/master@{#36365}

TBR=littledan@chromium.org,caitpotter88@gmail.com
# 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/1997453004
Cr-Commit-Position: refs/heads/master@{#36369}

Revert of Refactor script position calculation (patchset #6 id:100001 of https://codereview.chromium.org/1986173002/ )

Reason for revert:
Breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/6896

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 and removed the line_ends JS
> accessor.
>
> R=yangguo@chromium.org
> BUG=
>
> Committed: https://crrev.com/c04d547298ce4fd425ef1eaa9b02ad1e177918dc
> Cr-Commit-Position: refs/heads/master@{#36359}

TBR=yangguo@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/1994973002
Cr-Commit-Position: refs/heads/master@{#36368}

R=machenbach@chromium.org

Review-Url: https://codereview.chromium.org/1994923002
Cr-Commit-Position: refs/heads/master@{#36367}

Inlines the ToBoolean operations in the interpreter. Also do some
cleanup to unify UnaryOp helper in the Interpreter, remove the unused
BinaryOp Runtime call helper and remove extra newlines.

BUG=v8:4280
LOG=N

Review-Url: https://codereview.chromium.org/1998593002
Cr-Commit-Position: refs/heads/master@{#36366}

BUG=v8:4483
R=littledan@chromium.org

Review-Url: https://codereview.chromium.org/1995723004
Cr-Commit-Position: refs/heads/master@{#36365}

This patch moves the wrapper code from the remembered-set to the
scavenger and the mark-compact code.

The wrapper code inspected a slot address to see if the object that
belongs to the address is in the from-space. If it was in the
from-space, then some callback was executed on the object. If the object
got move to the to-space, then the wrapper returned KEEP_SLOT, otherwise
REMOVE_SLOT.

This logic does not really belong to the remembered set, so I moved it
away from there.

R=ulan@chromium.org

Review-Url: https://codereview.chromium.org/1994933002
Cr-Commit-Position: refs/heads/master@{#36364}

R=mtrofin@chromium.org

Review-Url: https://codereview.chromium.org/1989203004
Cr-Commit-Position: refs/heads/master@{#36363}

BUG=v8:4483
R=neis@chromium.org,littledan@chromium.org,caitpotter88@gmail.com
LOG=N

Review-Url: https://codereview.chromium.org/1992173002
Cr-Commit-Position: refs/heads/master@{#36362}

The cached resource data pointer is a source of non-determinism when
creating the snapshot.  Long-term we may not keep the native source in
memory anyways, so caching the resource data pointer will not be
possible.

R=ulan@chromium.org
BUG=v8:4886
LOG=N

Review-Url: https://codereview.chromium.org/1990183002
Cr-Commit-Position: refs/heads/master@{#36361}

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=v8:4280
LOG=N

Review-Url: https://codereview.chromium.org/1965343002
Cr-Commit-Position: refs/heads/master@{#36360}

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 and removed the line_ends JS
accessor.

R=yangguo@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/1986173002
Cr-Commit-Position: refs/heads/master@{#36359}

BUG=chromium:613125
LOG=n

Review-Url: https://codereview.chromium.org/1992193002
Cr-Commit-Position: refs/heads/master@{#36358}

This patch extracts typed slot processing logic from
the PointerUpdatingVisitor to a set of functions.

Each of these functions takes an untyped slot processing function
and applies it to a typed slot.

BUG=chromium:612847
LOG=NO

Review-Url: https://codereview.chromium.org/1991843003
Cr-Commit-Position: refs/heads/master@{#36357}

BUG=chromium:474921
LOG=n
NOTRY=true

Review-Url: https://codereview.chromium.org/1988163002
Cr-Commit-Position: refs/heads/master@{#36356}

Review-Url: https://codereview.chromium.org/1995543003
Cr-Commit-Position: refs/heads/master@{#36355}

R=titzer@chromium.org, yangguo@chromium.org

Review-Url: https://codereview.chromium.org/1961453002
Cr-Commit-Position: refs/heads/master@{#36354}

Revert of Adding ia32 simd assembler changes. (patchset #2 id:20001 of https://codereview.chromium.org/1991713002/ )

Reason for revert:
Crashes on win32 debug:
https://build.chromium.org/p/client.v8/builders/V8%20Win32%20-%20debug/builds/2305/steps/Check/logs/stdio

Also, would be nice if the test output could be a bit shorter and only print what's necessary to trace a failure. Or split things into more smaller tests. Like that, these logs must be processed, json-encoded/decoded and sent around through the infrastructure.

Some chars in the output make the json encoder unhappy, therefore the infrastructure can't nicely display the failures.

Original issue's description:
> Adding ia32 simd assembler support.
>
> Based on assembler changes from this patch:
> https://codereview.chromium.org/90643003/
>
> BUG=https://bugs.chromium.org/p/v8/issues/detail?id=4124
> R=titzer@chromium.org
> LOG=N
>
> Committed: https://crrev.com/fbf58a5af1d07a7fbb3763aa15f8ba26e2ce7d11
> Cr-Commit-Position: refs/heads/master@{#36349}

TBR=bbudge@chromium.org,titzer@chromium.org,gdeepti@chromium.org,aseemgarg@chromium.org,bradnelson@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=https://bugs.chromium.org/p/v8/issues/detail?id=4124

Review-Url: https://codereview.chromium.org/1992163002
Cr-Commit-Position: refs/heads/master@{#36353}

1) avoid the builder
2) by precomputing the result we're guaranteed to have a flat string
avoiding extra cost later of using the string

BUG=

Review-Url: https://codereview.chromium.org/1988023004
Cr-Commit-Position: refs/heads/master@{#36352}

Review-Url: https://codereview.chromium.org/729913004
Cr-Commit-Position: refs/heads/master@{#36351}

Code in V8 embeds memory addresses. Upon deserialization, those addresses will
be updated anyways, so it's not important whether the serializer records those
addresses. In order to have a deterministic build, we create a copy of the code
and null out memory addresses and serialize this copy.

For the code cache, we do not care about determinism. By avoiding the copy we
can save some time spent on serialization. For the mandreel script in Octane,
this reduces the serialization time from ~85ms to ~75ms.

R=vogelheim@chromium.org

Review-Url: https://codereview.chromium.org/1991033003
Cr-Commit-Position: refs/heads/master@{#36350}

Based on assembler changes from this patch:
https://codereview.chromium.org/90643003/

BUG=https://bugs.chromium.org/p/v8/issues/detail?id=4124
R=titzer@chromium.org
LOG=N

Review-Url: https://codereview.chromium.org/1991713002
Cr-Commit-Position: refs/heads/master@{#36349}

Empty function names are allowed and are output as such, unnamed
functions or functions with no valid UTF-8 name are output as
"<WASM UNNAMED>", while the CallSite object returns null as the
function name.

R=titzer@chromium.org, yangguo@chromium.org

Review-Url: https://codereview.chromium.org/1970503004
Cr-Commit-Position: refs/heads/master@{#36348}

Revert of Reland changes to v8_snapshot GN build arg. (patchset #2 id:20001 of https://codereview.chromium.org/1979883002/ )

Reason for revert:
Blocks the roll again:
https://codereview.chromium.org/1993163002/

https://build.chromium.org/p/tryserver.chromium.linux/builders/chromeos_amd64-generic_chromium_compile_only_ng/builds/140169

Lets add chromeos_amd64-generic_chromium_compile_only_ng on a reland as well.

Original issue's description:
> Reland changes to v8_snapshot GN build arg.
>
> This patch re-lands #36193 with a couple of minor tweaks
> including updating the BUILD.gn file to use the new
> variable name and incorporating thakis' request to support
> cross-compiling the win snapshot from a mac.
>
> R=thakis@chromium.org, jochen@chromium.org, machenbach@chromium.org
> BUG=608596, 595653
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:chromeos_daisy_chromium_compile_only_ng
>
> Committed: https://crrev.com/b6168e1223d266dba1a357a921bc84ae97a1d803
> Cr-Commit-Position: refs/heads/master@{#36342}

TBR=jochen@chromium.org,thakis@chromium.org,stevenjb@chromium.org,adamk@chromium.org,dpranke@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=608596, 595653

Review-Url: https://codereview.chromium.org/1996533002
Cr-Commit-Position: refs/heads/master@{#36347}

The default value of the flag was true, so --intl_extra was not previously
unshipped. This patch sets it to false.

BUG=v8:3785
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_noi18n_rel_ng

Review-Url: https://codereview.chromium.org/1990763003
Cr-Commit-Position: refs/heads/master@{#36346}

  port 5c22cf5a (r36341)

  original commit message:

BUG=

Review-Url: https://codereview.chromium.org/1990133002
Cr-Commit-Position: refs/heads/master@{#36345}

X87: [Interpreter] Remove InterpreterExitTrampoline and replace with returning to the entry trampoline.

  port 39738bc9 (r36310)

  original commit message:
  In order to support compiling to baseline on return we need to be able to
  return to the actual return address. With this change this is what the
  Return bytecode now does, removing the need for the
  InterpreterExitTrampoline.

  This change also removes the InterpreterNotifyDeoptXXX builtins and
  unifies FCG and Igntion to both use NotifyDeoptXXX. As part of this
  change, FullCodegenerator::State is moved to Deoptimize::BailoutState.

BUG=

Review-Url: https://codereview.chromium.org/1987053006
Cr-Commit-Position: refs/heads/master@{#36344}

Rolling v8/build to b2d15686436cdc17f67c3621c314f8d96b5b6fd9

Rolling v8/tools/clang to 996bab489f816e51dde704bd215fb3403919f07e

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

Review-Url: https://codereview.chromium.org/1992113002
Cr-Commit-Position: refs/heads/master@{#36343}

This patch re-lands #36193 with a couple of minor tweaks
including updating the BUILD.gn file to use the new
variable name and incorporating thakis' request to support
cross-compiling the win snapshot from a mac.

R=thakis@chromium.org, jochen@chromium.org, machenbach@chromium.org
BUG=608596, 595653
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:chromeos_daisy_chromium_compile_only_ng

Review-Url: https://codereview.chromium.org/1979883002
Cr-Commit-Position: refs/heads/master@{#36342}

Review-Url: https://codereview.chromium.org/1986113004
Cr-Commit-Position: refs/heads/master@{#36341}

Instead of directly looking up Uint8Array.__proto__, to get a hold of
the TypedArray prototype, use object_get_prototype_of. This is a
functionally equivalent, but cleaner approach.

Review-Url: https://codereview.chromium.org/1990983002
Cr-Commit-Position: refs/heads/master@{#36340}

Prevent crash/UB during stack frame iteration through functions, which occurs
when debugging, when building stacktraces, etc.

Also prevents these functions from appearing in stacktraces, by unsetting the "native" flag.

BUG=v8:4483, v8:5025
R=yangguo@chromium.org, littledan@chromium.org, adamk@chromium.org

Review-Url: https://codereview.chromium.org/1990803005
Cr-Commit-Position: refs/heads/master@{#36339}