The fast paths aren't pure and have side effects like calling out to
the debugger and runtime calls. Note: These aren't "fast" paths per se,
but just *native promise* code paths.

Forcing the slow path omits these calls to the debugger and runtime
causing test failures.

Bug: v8:7148
Change-Id: Idf46a33622a6edf03d69fefa4c6bfb7efc8ea625
Reviewed-on: https://chromium-review.googlesource.com/824102Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50197}

When we decode operands of WebAssembly instructions, we do not use the
current pc but a pc of the instruction plus some offset. However, the
pc of the instruction + offset can become invalid in case of a decoder
error. Therefore we have to stop decoding operands explicitly in case
of an error.

R=clemensh@chromium.org

Bug: chromium:795131
Change-Id: I3b7b45782c71a70364adf930bee3e94a1be88fea
Reviewed-on: https://chromium-review.googlesource.com/832867
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50196}

This is to make the diffs on rolls and releases smaller.

NOTRY=true

Change-Id: I3fb837a70e7b5be0f9d5b5b7ea6318d6a22ebd32
Reviewed-on: https://chromium-review.googlesource.com/832464Reviewed-by: Michael Hablich <hablich@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50195}

It's still unused there but now at least it ends up in the
feedback vector.

Bug: v8:6791
Change-Id: I0114d317830b80be4715c74dc5a8950fff4d3485
Reviewed-on: https://chromium-review.googlesource.com/829136Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50194}

There was an issue when the caller of a function with multiple returns
did not use all values which were returned over the stack. The caller
used only the used returns to calculate the offsets on the stack,
whereas the callee used all returns to calculate the offsets.

With this CL also the caller uses all returns to calculate the stack
offsets and thereby agrees again with the callee on the location of
all returns.

In addition I fixed an issue on x64: A quad word is reserved on the
stack frame to spill callee-saved FP registers, which is not pointer
size.

R=titzer@chromium.org

Change-Id: Ibe56b4b57e4b6e59071a868805b1237412344f93
Reviewed-on: https://chromium-review.googlesource.com/824043Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50193}

This is the counterpart of https://crrev.com/c/822471.
It implements asm.js bounds checks for loads using normal branch nodes
and removes the need for CheckedLoad, improving maintainability at some
small cost to compilation time.

R=ahaas@chromium.org
CC=mstarzinger@chromium.org, titzer@chromium.org

Change-Id: I7a2716f364b9e4d7beb9cc460eb028c3bd1c3a99
Reviewed-on: https://chromium-review.googlesource.com/832457
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50192}

Bug: v8:7127, v8:6270
Change-Id: Ic35a9b7a5145115736934b0c7de6ace26e9c0e51
Reviewed-on: https://chromium-review.googlesource.com/832966
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50191}

R=mlippautz@chromium.org

Bug: chromium:795856
Change-Id: I2a631a94e4bc0c000842923a962e812e0370b837
Reviewed-on: https://chromium-review.googlesource.com/832454
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50190}

Bug: v8:7127
Change-Id: I9081710445bf44e1af18e8f254f373c5736792a5
Reviewed-on: https://chromium-review.googlesource.com/832477Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50189}

Teach the fuzzer about the new DotAll flag.

Bug: v8:6612
Change-Id: I92d6bfd920f5daef6733b1c547063ede718ecc8f
Reviewed-on: https://chromium-review.googlesource.com/832748Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50188}

The memory size is always stored as 32 bit value, so the comparison
should always be done in 32 bit space.

R=ahaas@chromium.org

Change-Id: Ic059e63bf1dc9e8bf568dbb5f8d7ccde1da4761a
Reviewed-on: https://chromium-review.googlesource.com/832473Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50187}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/9caf5bf..9f00b2f

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/9cfb34e..035dfdb

Rolling v8/third_party/instrumented_libraries: https://chromium.googlesource.com/chromium/src/third_party/instrumented_libraries/+log/2841745..b7578b4

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/ec766dc..07e0150

Rolling v8/tools/luci-go: https://chromium.googlesource.com/chromium/src/tools/luci-go/+log/45a8a51..564ab65

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

Change-Id: Ibb83e4858f476caaece11b8365234351a2211995
Reviewed-on: https://chromium-review.googlesource.com/832788
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50186}

Bug: 
Change-Id: I7d4152139548d8a24c0b444dfff3c363bf92680b
Reviewed-on: https://chromium-review.googlesource.com/816836
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50185}

Even inside an "#ifdef DEBUG", we still want to use the DCHECK macro
instead of CHECK in order to get the "correct" error message.

Drive-by: Remove "#ifdef DEBUG" around DCHECKS in macro-assembler-x64.cc

R=ahaas@chromium.org
CC=mtrofin@chromium.org

Change-Id: I5b92c87fa9b10e5751cc2704d6218bee292cfb8f
Reviewed-on: https://chromium-review.googlesource.com/832687Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50184}

Remove comment about usage of FATAL, UNREACHABLE and UNIMPLEMENTED,
which was deprecated since https://crrev.com/1410713006.
Also, refactor the FATAL macro and use it for implementing UNREACHABLE
and UNIMPLEMENTED, and in more code. The benefit over printf +
CHECK(false) is that the compiler knows that FATAL will never return.

R=bmeurer@chromium.org

Change-Id: I8c2ab3b4e6edfe8eff5ec6fdf3d92b15d0ed7126
Reviewed-on: https://chromium-review.googlesource.com/832726Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50183}

This reverts commit c3dda0bb.

Reason for revert: Breaks gc stress bots:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/14266

Original change's description:
> Enable --harmony-function-tostring by default
>
> Update tests to work with new behavior.
>
> This feature is shipping in Firefox 54, so compatibility risk is low.
>
> R=​littledan@chromium.org, adamk@chromium.org, caitp@igalia.com
> CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel
>
> Bug: v8:4958
> Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
> Change-Id: Ib16d19468cf935f961d7bcd856ebbeb5692d3e61
> Reviewed-on: https://chromium-review.googlesource.com/546941
> Commit-Queue: Josh Wolfe <jwolfe@igalia.com>
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#50178}

TBR=adamk@chromium.org,hablich@chromium.org,kozyatinskiy@chromium.org,littledan@chromium.org,caitp@igalia.com,jwolfe@igalia.com

Change-Id: Ie5dd0bd2b97ae6d0126edec6373e48abe0eeb3f0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:4958
Reviewed-on: https://chromium-review.googlesource.com/832649
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50182}

TBR=sergiyb@chromium.org

No-Try: true
Change-Id: I16311dee2256f800f9d8fd297e1d45ae301fa207
Reviewed-on: https://chromium-review.googlesource.com/832452Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50181}

TBR=sergiyb@chromium.org

No-Try: true
Change-Id: I86256c61155e42c193a2532adc15392c0bf33e3b
Reviewed-on: https://chromium-review.googlesource.com/832451
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50180}

Patch will decrease size of JS files included into Chrome APK
(about 11 KB now)

Bug: 
Change-Id: I701c9904fbf22fd295199f255601dea6524a3766
Reviewed-on: https://chromium-review.googlesource.com/821071Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Marcin Wiącek <marcin@mwiacek.com>
Cr-Commit-Position: refs/heads/master@{#50179}

Update tests to work with new behavior.

This feature is shipping in Firefox 54, so compatibility risk is low.

R=littledan@chromium.org, adamk@chromium.org, caitp@igalia.com
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Bug: v8:4958
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: Ib16d19468cf935f961d7bcd856ebbeb5692d3e61
Reviewed-on: https://chromium-review.googlesource.com/546941
Commit-Queue: Josh Wolfe <jwolfe@igalia.com>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50178}

This CL removes LoadScriptContextFieldStub and StoreScriptContextFieldStub.

Bug: v8:7206, chromium:576312
Change-Id: I217eeb726ca7d1ec85a67331da4941b9ac2a4b7a
Reviewed-on: https://chromium-review.googlesource.com/831867Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50177}

We should not report promise created for async function as candidate
for stepping. Regular StepInto works fine in this case.

TBR=dgozman@chromium.org

Bug: none
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I8dafec5417df0de593cb2a1c06d6a11093e7c64b
Reviewed-on: https://chromium-review.googlesource.com/828024Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50176}

I also added a test for movdqa, which was already implemented.

R=bmeurer@chromium.org

Change-Id: I6dd5cba072f1439dcdfb5f975de116e4534c7581
Reviewed-on: https://chromium-review.googlesource.com/832466Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50175}

The WasmCompiledModule is kept alive from the Script, which again is
kept alive then the debugger is enabled. This, however, should not keep
the whole context alive, including the global object.
Hence, we only store a weak reference to the native context.

R=ahaas@chromium.org

Bug: chromium:750256
Change-Id: Ia409995c40fb3e90665534fbc94c6eafc081c4e5
Reviewed-on: https://chromium-review.googlesource.com/832126
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50174}

The interface of {WasmCompiledModule} currently mostly receives and
provides handles to the contained data. Other interfaces don't (see
{object-macros.h}.
This leads to performance and memory overhead for chained accesses like
{instance->compiled_module()->shared()->script()}, because intermediate
accessors allocate Handles for no reason. It also breaks the
constraints that lower-case accessors should be trivial to execute, but
allocating a handle is not trivial (should not be done in a loop if not
needed).
It also silences gcmole errors, as documented in
https://crrev.com/c/832268.

R=ahaas@chromium.org, mtrofin@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ib82fb295977a47b4a8ab9bae9c9b6e2b235ad5e5
Reviewed-on: https://chromium-review.googlesource.com/832387
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50173}

This CL allows deopts from CheckString to disable
speculation.

Bug: v8:7127, v8:6270
Change-Id: I029caeb61c509e5eb51b169ac42596d632f7c75a
Reviewed-on: https://chromium-review.googlesource.com/831866
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50172}

This CL passes feedback from the element kind deopt points
in Array.push to the deoptimizer. If the deopt points are
triggered, further speculation on Array.push is disallowed.

Bug: v8:7127, v8:7204
Change-Id: Ie91dee598bd8b8797110c8f468406327226893a4
Reviewed-on: https://chromium-review.googlesource.com/831523
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50171}

Move the one remaining optimization disabling in AST numbering (native
function literals) to be in the parser.

Bug: v8:7178
Change-Id: Icd96020622cbe64afa11b42c5831618247e3e021
Reviewed-on: https://chromium-review.googlesource.com/814399
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50170}

Make sure that a continue still executed the increment part of a for
loop by adding another nested block for the body, which is the break
target for a continue in the body. The increment code lives outside
this block, in the original loop.

R=bradnelson@chromium.org
CC=mstarzinger@chromium.org

Bug: chromium:788916
Change-Id: I178b874ffac16d9237a0f4da097d2742bd93335a
Reviewed-on: https://chromium-review.googlesource.com/832447
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50169}

Move literal initialization out of AST numbering and into the parser.
The initialization includes setting the depth and flags of Object and
Array literals, and calculating the emit store of object literals.

Bug: v8:7178
Change-Id: I9af59a2fea44f8a1adcc5a0261f29ce97fa8da92
Reviewed-on: https://chromium-review.googlesource.com/814634
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50168}

This change is quite invasive, because CheckSmi is lowered
through representation change depending on UseInfo to several
different checked conversion operators. This CL adds feedback
to every checked conversion operator to Int32.

Bug: v8:7127, v8:7204
Change-Id: Icb780e5a69d321c2ec161c3c2a32984bdcf101f1
Reviewed-on: https://chromium-review.googlesource.com/831521Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50167}

This makes --print-code and --print-wasm-code also print code emitted
on the native wasm heap.
It also extends code printing to include the code kind and the index.

R=mtrofin@chromium.org

Change-Id: I39c23f4b65168c059f23477ec5d264924ca83e82
Reviewed-on: https://chromium-review.googlesource.com/831987Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50166}

The pattern "handle->foo(factory->NewXX())" is unsafe, because the
evaluation order of the receiver (dereferencing the handle) and the
argument (allocating something on the heap) is undefined. If the
receiver is evaluated first, then the allocation in the evaluation of
the argument might invalidate the receiver.
In general, gcmole should catch these errors, but sadly, if the
method "foo" receives a Handle, it seems to not catch them.
We should generally refactor our getters and setters to receive and
return raw pointers instead of handles, just like most other code in
our code base.

R=mtrofin@chromium.org, ahaas@chromium.org

Bug: v8:7224
Change-Id: If9e84e4ca7efe02c40b97a8c5c549c222947d6bb
Reviewed-on: https://chromium-review.googlesource.com/832268Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50165}

... by "inlining" the Tuple2 object into the data handler.

Bug: v8:7206, v8:5561
Change-Id: I8517b2faa8d13bd16b8ec99c7ea8ab97c73a5f2a
Reviewed-on: https://chromium-review.googlesource.com/819233Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50164}

Bug: v8:6917
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I69d15801b79bf7aa846582367e9f3037b6612431
Reviewed-on: https://chromium-review.googlesource.com/829033
Commit-Queue: Michał Majewski <majeski@google.com>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50163}

Add additional protection against OOB accesses by masking the
index to access by a mask precomputed from the memory size.

R=clemensh@chromium.org, bradnelson@chromium.org

Change-Id: I1d5875121e1904074b115a2c88ca773b6c1c1a66
Reviewed-on: https://chromium-review.googlesource.com/830394Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50162}

TBR=machenbach@chromium.org

No-Try: true
Bug: chromium:747960
Change-Id: I2befa4776ba51d0512a86e43a44a5ca4afd34b1b
Reviewed-on: https://chromium-review.googlesource.com/832446
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50161}

If a command prefix should be used in predictable mode, it should
wrap around d8 and not around the predictable wrapper.

NOTRY=true
TBR=majeski@google.com

Bug: v8:7166
Change-Id: I16f33090c647ea4f6f040c6194908df6500b82a3
Reviewed-on: https://chromium-review.googlesource.com/832206
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50160}

Bug: v8:6917
Change-Id: I45ee0277bd243559746f9bc9396d1a8900c891cc
Reviewed-on: https://chromium-review.googlesource.com/832026
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50159}

The new maptracer provides a timeline visualization of the maps logged with
--trace-maps.

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I896d677e1d28ceb7b94e29139d25c1476c8ce157
Reviewed-on: https://chromium-review.googlesource.com/664719Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50158}