This changes behavior of TurboFan to match the behavior of Crankshaft
when it comes to polymorphic loads of similar elements kind (i.e. all
tagged or all double), where we should use the "worst case" code without
a transition. This is often much faster than transitioning the elements
to the worst case first, trading a TransitionElementsKind for a CheckMaps
and avoiding mutation of the array.

This is beneficial for various crypto benchmarks, which don't need to
pay the cost for TransitionElementsKind now.

R=jarin@chromium.org
BUG=v8:5267

Review-Url: https://codereview.chromium.org/2836943003
Cr-Commit-Position: refs/heads/master@{#44815}

VC++ 2017's STL doesn't suppress warnings as aggressively as prior
versions did. This causes warnings on code which mixes signed and
unsigned types. In this case a deque of unsigned integers was being
queried to see how many signed integers it contains. This could be
fixed by passing in unsigned 0, 1, and 2 to std::count but changing
the deque from unsigned to int is simpler.

R=adamk@chromium.org
BUG=chromium:683729

Review-Url: https://codereview.chromium.org/2834293002
Cr-Commit-Position: refs/heads/master@{#44814}

This makes it easier to set the value for embedders where it is
difficult to plumb through to the Isolate constructor.

BUG=chromium:711809
R=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2829223002
Cr-Commit-Position: refs/heads/master@{#44813}

- Adds new F32x4AddHoriz, I32x4AddHoriz, etc. to WASM opcodes.
- Implements them for ARM.

LOG=N
BUG=v8:6020

Review-Url: https://codereview.chromium.org/2804883008
Cr-Commit-Position: refs/heads/master@{#44812}

R=adamk@chromium.org
BUG=v8:1569

Review-Url: https://codereview.chromium.org/2833773002
Cr-Commit-Position: refs/heads/master@{#44811}

- All ARM hardware has 32 single precision float registers; save all
  s-registers regardless of the number of d-registers (16 or 32).

LOG=N
BUG=v8:6077

Review-Url: https://codereview.chromium.org/2821273004
Cr-Commit-Position: refs/heads/master@{#44810}

Bug:

Change-Id: I116591b80af41e8d210445ba4c2bc3b25577b15d
Reviewed-on: https://chromium-review.googlesource.com/480619Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44809}

In general, deleting a property from a fast-properties object
requires transitioning the object to dictionary mode. However,
when the most-recently-added property is deleted, we can simply
roll back the last map transition that the object went through.

This is a performance experiment: it should make things faster,
but if it turns out to have more negative than positive impact,
we will have to revert it.

TBR=bmeurer@chromium.org (just adding a comment)

Previously reviewed at https://codereview.chromium.org/2830093002
Previously landed as 98acfb36 / r44799

Review-Url: https://codereview.chromium.org/2840583002
Cr-Commit-Position: refs/heads/master@{#44808}

- Dispatch evacuation of a page to its concrete evacuator.
- Create MC base class to accommodate shared state.

BUG=chromium:651354

Review-Url: https://codereview.chromium.org/2828323004
Cr-Commit-Position: refs/heads/master@{#44807}

Revert of [builtins] DeleteProperty: Handle last-added fast properties (patchset #2 id:20001 of https://codereview.chromium.org/2830093002/ )

Reason for revert:
Breaks:
https://build.chromium.org/p/client.v8/builders/V8%20Mac%20GC%20Stress/builds/12920
and
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/10281

Original issue's description:
> [builtins] DeleteProperty: Handle last-added fast properties
>
> In general, deleting a property from a fast-properties object
> requires transitioning the object to dictionary mode. However,
> when the most-recently-added property is deleted, we can simply
> roll back the last map transition that the object went through.
>
> This is a performance experiment: it should make things faster,
> but if it turns out to have more negative than positive impact,
> we will have to revert it.
>
> TBR=bmeurer@chromium.org (just adding a comment)
>
> Review-Url: https://codereview.chromium.org/2830093002
> Cr-Commit-Position: refs/heads/master@{#44799}
> Committed: https://chromium.googlesource.com/v8/v8/+/98acfb36e1acf2ab52ab6b6439eb6356c83dcda6

TBR=ishell@chromium.org,jkummerow@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/2843473002
Cr-Commit-Position: refs/heads/master@{#44806}

This reverts commit e8f1fc24.

Reason for revert: Node.js doesn't build with this patch anymore. 

out/Release/obj/gen/debug-support.cc:428:55: error: expected initializer before ‘<’ token
 int v8dbg_class_Script__preparsed_scope_data__PodArray<uint32_t> = Script::kPreParsedScopeDataOffset;

Original change's description:
> [parser] Skipping inner funcs: use PodArray for the data.
> 
> The data produced by the preparser scope analysis might be large.
> 
> ByteArrays are already allowed in the large object space.
> 
> This fixes mjsunit/asm/poppler/poppler.js with the flag on.
> 
> BUG=v8:5516
> 
> Change-Id: I951836244776c57efdd2a491c5c78493dc8cca63
> Reviewed-on: https://chromium-review.googlesource.com/484459
> Commit-Queue: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#44795}

TBR=marja@chromium.org,mstarzinger@chromium.org,ulan@chromium.org,vogelheim@chromium.org,hpayer@chromium.org,v8-reviews@googlegroups.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5516

Change-Id: I3012d27b6b65b37d3afc5f3b0921e044bdcc118e
Reviewed-on: https://chromium-review.googlesource.com/485759Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44805}

This patch cleans up the Intl code by switching to using declared
accessors, rather than embedder fields, for holding references to
ICU objects. Additionally:
- Rename classes to be more similar to how other classes are named
- Make some unreachable paths into check-fails, rather than throwing
  JS exceptions
- Move some macros from objects-inl.h into object-macros.h, to allow
  the implementation here to not touch objects.h
- Some setup logic is moved from runtime-i18n.cc to i18n.cc.

This patch leaves type tags as they are; a future patch should move
from a special Intl type tagging system to object types as other system
objects use. Future patches should also move more logic to i18n.cc

BUG=v8:5402,v8:5751,v8:6057
CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_noi18n_rel_ng

Change-Id: Ia9cbb25cf8f52662e3deb15e64179d792c10842c
Reviewed-on: https://chromium-review.googlesource.com/479651
Commit-Queue: Daniel Ehrenberg <littledan@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44804}

I have no idea how the empty folder got
in there in the first place ¯\_(ツ)_/¯.

Bug:

Change-Id: I0fd94d1dec76f2444b24f772c1691924f872ec55
Reviewed-on: https://chromium-review.googlesource.com/485621Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44803}

Also move the responsibility of marking builtins as initialized
to the deserializer.

R=jkummerow@chromium.org

Review-Url: https://codereview.chromium.org/2840493002
Cr-Commit-Position: refs/heads/master@{#44802}

- Split out code for Intl objects into src/objects/
- Rename i18n to intl (except for the name of the build flag)
- Use build system more broadly to turn on/off Intl code
- Delete a little bit of dead code

Bug: v8:5751
Change-Id: I41bf2825a5cb0df20824922b17c24cae637984da
Reviewed-on: https://chromium-review.googlesource.com/481284Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Daniel Ehrenberg <littledan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44801}

This makes sure that typed array constructors (e.g. Int8Array, ...) used
within an asm.js module are considered uses of stdlib values, and hence
are checked during module instantiation.

R=clemensh@chromium.org
TEST=mjsunit/regress/regress-6280
BUG=v8:6280,chromium:714537

Change-Id: Ic5d689f5319c4dac4e9df3dca4a8cf5a4edd890b
Reviewed-on: https://chromium-review.googlesource.com/485521
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44800}

In general, deleting a property from a fast-properties object
requires transitioning the object to dictionary mode. However,
when the most-recently-added property is deleted, we can simply
roll back the last map transition that the object went through.

This is a performance experiment: it should make things faster,
but if it turns out to have more negative than positive impact,
we will have to revert it.

TBR=bmeurer@chromium.org (just adding a comment)

Review-Url: https://codereview.chromium.org/2830093002
Cr-Commit-Position: refs/heads/master@{#44799}

Local refactoring to replace if cascade by switch. For readability and
performance.

R=ahaas@chromium.org

Change-Id: I064d51c7c8232fefcde223b086eb7b9caf44f94c
Reviewed-on: https://chromium-review.googlesource.com/485480
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44798}

for now, it's just the methods
- log
- warn
- debug
- info
- error
- time
- timeEnd

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2840543002
Cr-Commit-Position: refs/heads/master@{#44797}

R=jgruber@chromium.org
BUG=v8:5821

Review-Url: https://codereview.chromium.org/2841513002
Cr-Commit-Position: refs/heads/master@{#44796}

The data produced by the preparser scope analysis might be large.

ByteArrays are already allowed in the large object space.

This fixes mjsunit/asm/poppler/poppler.js with the flag on.

BUG=v8:5516

Change-Id: I951836244776c57efdd2a491c5c78493dc8cca63
Reviewed-on: https://chromium-review.googlesource.com/484459
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44795}

Add missing kEnd opcode after each body. Also, avoid the macro.
This fix is needed for follow-up changes to the control transfer
computation.

R=ahaas@chromium.org
BUG=v8:5822

Change-Id: If2b4dbea831ec40939a2045701f3d13479331773
Reviewed-on: https://chromium-review.googlesource.com/485481Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44794}

BUG=

Review-Url: https://codereview.chromium.org/2775503006
Cr-Commit-Position: refs/heads/master@{#44793}

This is the arm64 implementation fo the CL
https://codereview.chromium.org/2763593002

Original message:

[wasm][arm] Add an additional stack check for functions with big frames.

Stack overflow checks are typically implemented as part of the TurboFan
graph of a function. This means that the stack check code is executed
after frame construction. When a frame is too big, though, there may not
be enough space on the stack anymore to throw the stack overflow
exception after frame construction. With this CL we do an additional
stack check before frame construction for functions with big frames.

As discussed offline with mstarzinger, I do this change currently only
for WebAssembly.

This CL contains only the changes for arm. I will do the other platforms
in separate CLs.

R=mstarzinger@chromium.org, rodolph.perfetta@gmail.com, v8-arm-ports@googlegroups.com

Review-Url: https://codereview.chromium.org/2785723002
Cr-Commit-Position: refs/heads/master@{#44792}

For now skip some WASM SIMD tests that fail when MIPS SIMD extension is
not available. Turn on these tests again when simd scalar lowering
mechanism supports all WASM SIMD operations.

BUG=

Review-Url: https://codereview.chromium.org/2829963003
Cr-Commit-Position: refs/heads/master@{#44791}

Consistently support calls to host-C-linkage functions with up to 9 arguments
from the simulator, and check that these limits aren't exceeded accidentally.

BUG=v8:6281

Review-Url: https://codereview.chromium.org/2825393003
Cr-Commit-Position: refs/heads/master@{#44790}

This file is never updated, I think we don't use 
it  - or we are using a Chromium
revision from 2013 as baseline.

Bug:

Change-Id: I82496d04cfa7c19e8c44ce9d9d2fa914e0c0d706
Reviewed-on: https://chromium-review.googlesource.com/485600Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44789}

We already have an optimization to constant-fold access to an object's
prototype via the special __proto__ accessor (specified in appendix B).
We can use the same optimization to also constant-fold accesses to an
object's prototype via the official Object.getPrototypeOf function.

Also add the optimization for Reflect.getPrototypeOf, which is
equivalent for object inputs.

This is commonly used by Babel to implement various new language
features, for example subclassing and certain property lookups.

R=yangguo@chromium.org
BUG=v8:6292

Review-Url: https://codereview.chromium.org/2841463002
Cr-Commit-Position: refs/heads/master@{#44788}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/e3e598a..4636d31

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

Change-Id: Ibd4494496354a6ee1c7aa348d06c081507f39e69
Reviewed-on: https://chromium-review.googlesource.com/485140Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44787}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/ff3857b..e3e598a

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/34ee837..4d43438

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

Change-Id: Ibba7b3dafaba3cc1f416e960595305e657e0c82f
Reviewed-on: https://chromium-review.googlesource.com/484939Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44786}

.. replace all of them with prepared global object template.

+ bonus: wrap inspector related methods with inspector namespace.

BUG=none
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2832723004
Cr-Commit-Position: refs/heads/master@{#44785}

These can be synthesized from existing operations and scheduled for
better performance than if we have to generate blocks of instructions
that take many cycles to complete.
- Remove F32x4RecipRefine, F32x4RecipSqrtRefine. Clients are better off
  synthesizing these from splats, multiplies and adds.
- Remove F32x4Div, F32x4Sqrt, F32x4MinNum, F32x4MaxNum. Clients are
  better off synthesizing these or using the reciprocal approximations,
  possibly with a refinement step.

LOG=N
BUG=v8:6020

Review-Url: https://codereview.chromium.org/2827143002
Cr-Commit-Position: refs/heads/master@{#44784}

Review-Url: https://codereview.chromium.org/2827263004
Cr-Commit-Position: refs/heads/master@{#44783}

BUG=chromium:713365

Change-Id: I5d9d5b5e00a637923a1a3e0dc7f81fa4075c4e82
Reviewed-on: https://chromium-review.googlesource.com/484300Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44782}

Bug:

Change-Id: I532e8894df288c81a71b08ca85742f2847f57191
Reviewed-on: https://chromium-review.googlesource.com/484339
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44781}

Ensure source map is not stable if elements kind transitions are expected.

BUG=chromium:700733

Change-Id: Ie937e7064127250b1100109986c3e9b411fae1d6
Reviewed-on: https://chromium-review.googlesource.com/483442Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44780}

If we avoid throwing a stack overflow exception from Irregexp code during
direct calls, there is no need to construct exit frames before the Irregexp
call anymore. As that was the last remaining blocker, we can now implement the
entire stub in CSA.

BUG=v8:5339

Review-Url: https://codereview.chromium.org/2752143003
Cr-Original-Original-Commit-Position: refs/heads/master@{#44770}
Committed: https://chromium.googlesource.com/v8/v8/+/74f2497eae068f85da26904d8c451376c77957bf
Review-Url: https://codereview.chromium.org/2752143003
Cr-Original-Commit-Position: refs/heads/master@{#44775}
Committed: https://chromium.googlesource.com/v8/v8/+/9c0832eb1aceba625a2443a31d51bcaf550c575a
Review-Url: https://codereview.chromium.org/2752143003
Cr-Commit-Position: refs/heads/master@{#44779}

R=franzih@chromium.org

Review-Url: https://codereview.chromium.org/2834053002
Cr-Commit-Position: refs/heads/master@{#44778}

NOTRY=true

Review-Url: https://codereview.chromium.org/2834853002
Cr-Commit-Position: refs/heads/master@{#44777}

Revert of [regexp] Remove remainder of native RegExpExecStub (patchset #10 id:180001 of https://codereview.chromium.org/2752143003/ )

Reason for revert:
More failures on ports:

https://build.chromium.org/p/client.v8.ports/builders/V8%20Android%20Arm64%20-%20builder/builds/9123/steps/compile/logs/stdio

https://build.chromium.org/p/client.v8.ports/builders/V8%20Mips%20-%20builder/builds/8966/steps/compile/logs/stdio

Original issue's description:
> [regexp] Remove remainder of native RegExpExecStub
>
> If we avoid throwing a stack overflow exception from Irregexp code during
> direct calls, there is no need to construct exit frames before the Irregexp
> call anymore. As that was the last remaining blocker, we can now implement the
> entire stub in CSA.
>
> BUG=v8:5339
>
> Review-Url: https://codereview.chromium.org/2752143003
> Cr-Original-Commit-Position: refs/heads/master@{#44770}
> Committed: https://chromium.googlesource.com/v8/v8/+/74f2497eae068f85da26904d8c451376c77957bf
> Review-Url: https://codereview.chromium.org/2752143003
> Cr-Commit-Position: refs/heads/master@{#44775}
> Committed: https://chromium.googlesource.com/v8/v8/+/9c0832eb1aceba625a2443a31d51bcaf550c575a

TBR=ishell@chromium.org,mstarzinger@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5339

Review-Url: https://codereview.chromium.org/2832193002
Cr-Commit-Position: refs/heads/master@{#44776}