1.
DCHECK in runtime-i18n.cc for case mapping was wrong to
assume that the longest primary language tag is 3 characters.
BCP 47 actually allows up to 8 characters.

2. GetFlatContent() was called to a string without flattening it first.

BUG=680314,680464
TEST=intl/general/case-mapping (see also the bugs)

Review-Url: https://codereview.chromium.org/2629763003
Cr-Commit-Position: refs/heads/master@{#42343}

We weren't throwing LinkError where appropriate

progress

BUG=v8:5835

Review-Url: https://codereview.chromium.org/2629523007
Cr-Commit-Position: refs/heads/master@{#42342}

Enabled support for Power9 hardware and implemented P9 modulo
instruction.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, jochen@chromium.org
BUG=
LOG=n

Review-Url: https://codereview.chromium.org/2625013002
Cr-Commit-Position: refs/heads/master@{#42341}

If installed, this listener is called instead of general DebugEventListener.

BUG=v8:5510
R=yangguo@chromium.org,	jgruber@chromium.org, dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2623313005
Cr-Commit-Position: refs/heads/master@{#42340}

Inspector uses event name only for enqueue* events and doesn't really need name for other events.

BUG=v8:5738
R=jgruber@chromium.org,gsathya@chromium.org
TBR=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2628173005
Cr-Commit-Position: refs/heads/master@{#42339}

New options: v8_enable_trace_maps, v8_enable_v8_checks.
Renamed options for consistency: v8_object_print to v8_enable_object_print.
Fixed options: v8_enable_verify_heap, v8_enable_object_print.

BUG=

Review-Url: https://codereview.chromium.org/2625393003
Cr-Commit-Position: refs/heads/master@{#42338}

Followup to https://codereview.chromium.org/2621983002/ so that
v8-version-string.h is includeable with varying include search paths.
This seems to match the pattern of other #includes in the include/
directory.

R=machenbach@chromium.org
BUG=chromium:581766

Review-Url: https://codereview.chromium.org/2634443002
Cr-Commit-Position: refs/heads/master@{#42337}

In the ideal case, this will speed up Object.create(null) by ~10x.

Drive-by-fix: Spread usage of new IsSpecialReceiverMap() and
              IsSpecialReceiverInstanceType(InstanceType) helpers.

BUG=v8:5788

Review-Url: https://codereview.chromium.org/2622723003
Cr-Commit-Position: refs/heads/master@{#42336}

Now that validate asm is on by default, the comparison fullcode with
ignition_staging does nothing in regards to validate_asm.

BUG=chromium:673246
NOTRY=true
TBR=bradnelson@chromium.org, titzer@chromium.org

Review-Url: https://codereview.chromium.org/2634573002
Cr-Commit-Position: refs/heads/master@{#42335}

With this CL, context loads and stores are "strengthened" by reducing
the incoming context chain and decreasing the depth accordingly,
whenever possible.  This enables more opportunities for specialization
and will let us easily add module context specialization later.

BUG=

Review-Url: https://codereview.chromium.org/2559173003
Cr-Commit-Position: refs/heads/master@{#42334}

R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/2627723007
Cr-Commit-Position: refs/heads/master@{#42333}

When we merge two NotFound access infos, we currently forgot to include
all the maps into the final PropertyAccessInfo, which results in a deopt
loop.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2625413003
Cr-Commit-Position: refs/heads/master@{#42332}

This puts lowering of {JSCreateClosure} operations behind a flag. For
now the benefit of inline allocating such closures is negligible, it
does increase code size, and breaks in combination with inlining based
on {SharedFunctionInfo}.

R=jarin@chromium.org
BUG=v8:2206

Review-Url: https://codereview.chromium.org/2636493002
Cr-Commit-Position: refs/heads/master@{#42331}

- condense repeated elements
- print map

BUG=

Review-Url: https://codereview.chromium.org/2626023002
Cr-Commit-Position: refs/heads/master@{#42330}

BUG=v8:5495

Review-Url: https://codereview.chromium.org/2633553002
Cr-Commit-Position: refs/heads/master@{#42329}

BUG=v8:5495

Review-Url: https://codereview.chromium.org/2622413004
Cr-Commit-Position: refs/heads/master@{#42328}

R=marja@chromium.org

Review-Url: https://codereview.chromium.org/2628293003
Cr-Commit-Position: refs/heads/master@{#42327}

Revert of [compiler] Support Object.create(null) inlining in TF (patchset #5 id:80001 of https://codereview.chromium.org/2622723003/ )

Reason for revert:
Breaks buildbot: https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20avx2/builds/13399/steps/Benchmarks/logs/stdio

Original issue's description:
> [compiler] Support Object.create(null) inlining in TF
>
> In the ideal case, this will speed up Object.create(null) by ~10x.
>
> Drive-by-fix: Spread usage of new IsSpecialReceiverMap() and
>               IsSpecialReceiverInstanceType(InstanceType) helpers.
>
> BUG=v8:5788
>
> Review-Url: https://codereview.chromium.org/2622723003
> Cr-Commit-Position: refs/heads/master@{#42321}
> Committed: https://chromium.googlesource.com/v8/v8/+/ff7063c7d5d8ad8eafcce3da59e65d7fe2b4f915

TBR=jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5788

Review-Url: https://codereview.chromium.org/2636493003
Cr-Commit-Position: refs/heads/master@{#42326}

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

Review-Url: https://codereview.chromium.org/2621413009
Cr-Commit-Position: refs/heads/master@{#42325}

This changes the {MessageLocation} structure to no longer contain a
concrete {JSFunction} object but rather a {SharedFunctionInfo}. It is
much easier by now to determine, and also the concrete closure is never
actually being used.

R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2628973005
Cr-Commit-Position: refs/heads/master@{#42324}

Fix a deoptimization loop in TurboFan, where we'd constantly fail the
same map check due to not trying instance migration, when there are
migration targets in the map check list. This deoptimization loop
showed up on the React test in Speedometer.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2621423006
Cr-Commit-Position: refs/heads/master@{#42323}

R=jkummerow@chromium.org

Review-Url: https://codereview.chromium.org/2625053006
Cr-Commit-Position: refs/heads/master@{#42322}

In the ideal case, this will speed up Object.create(null) by ~10x.

Drive-by-fix: Spread usage of new IsSpecialReceiverMap() and
              IsSpecialReceiverInstanceType(InstanceType) helpers.

BUG=v8:5788

Review-Url: https://codereview.chromium.org/2622723003
Cr-Commit-Position: refs/heads/master@{#42321}

The simulator implements these exactly, but on ARM hardware,
the estimates are not exact, so CHECK_EQ will fail. This CL adds
a tolerance to the checks.

LOG=N
BUG=v8:4124

Review-Url: https://codereview.chromium.org/2628153003
Cr-Commit-Position: refs/heads/master@{#42320}

BUG=v8:5837
NOTRY=true

Review-Url: https://codereview.chromium.org/2636473002
Cr-Commit-Position: refs/heads/master@{#42319}

  The CL #42279 (https://codereview.chromium.org/2619353006 ) caused a gcc error (-Werror=strict-overflow).

  Here is the error message:
  In file included from .././src/globals.h:15:0,
                   from .././src/allocation.h:9,
                   from .././src/profiler/profile-generator.h:9,
                   from ../src/profiler/profile-generator.cc:5:
  .././src/base/logging.h: In member function ‘void v8::internal::ProfileTree::TraverseDepthFirst(Callback*) [with Callback = v8::internal::DeleteNodesCallback]’:
  .././src/base/logging.h:179:70: error: assuming signed overflow does not occur when assuming that (X - c) > X is always false [-Werror=strict-overflow]
                             : MakeCheckOpString<Lhs, Rhs>(lhs, rhs, msg);        \
                                                                            ^
  .././src/base/logging.h:191:1: note: in expansion of macro ‘DEFINE_CHECK_OP_IMPL’
   DEFINE_CHECK_OP_IMPL(GT, > )
   ^
    CXX(target) /home/zxli/work/google-v8/v8/out/x87.optdebug/obj.target/v8_base/src/regexp/regexp-macro-assembler.o
  cc1plus: all warnings being treated as errors

  This CL fix it.

BUG=

Review-Url: https://codereview.chromium.org/2632633002
Cr-Commit-Position: refs/heads/master@{#42318}

Revert of [wasm] Enforce that function bodies end with the \"end\" opcode. (patchset #6 id:100001 of https://codereview.chromium.org/2630553002/ )

Reason for revert:
Still breaks Win64 clang build.

Original issue's description:
> [wasm] Enforce that function bodies end with the \"end\" opcode.
>
> R=rossberg@chromium.org
> BUG=chromium:575167
>
> Review-Url: https://codereview.chromium.org/2630553002
> Cr-Original-Commit-Position: refs/heads/master@{#42286}
> Committed: https://chromium.googlesource.com/v8/v8/+/fcc6e85ec6b01e5367795f98aff104b1ff23f619
> Review-Url: https://codereview.chromium.org/2630553002
> Cr-Commit-Position: refs/heads/master@{#42315}
> Committed: https://chromium.googlesource.com/v8/v8/+/74a2f9b7d3c3d9a9284ab8d5a9d08618b8194966

TBR=mtrofin@chromium.org,rossberg@chromium.org,jbroman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:575167

Review-Url: https://codereview.chromium.org/2636463002
Cr-Commit-Position: refs/heads/master@{#42317}

Prior to this, traces recorded through chrome://tracing would not
include time spent in RunMicrotasks.

BUG=v8:5382

Review-Url: https://codereview.chromium.org/2592793003
Cr-Commit-Position: refs/heads/master@{#42316}

R=rossberg@chromium.org
BUG=chromium:575167

Review-Url: https://codereview.chromium.org/2630553002
Cr-Original-Commit-Position: refs/heads/master@{#42286}
Committed: https://chromium.googlesource.com/v8/v8/+/fcc6e85ec6b01e5367795f98aff104b1ff23f619
Review-Url: https://codereview.chromium.org/2630553002
Cr-Commit-Position: refs/heads/master@{#42315}

This adapts the aformentioned interface to no longer return a list of
{JSFunction} objects, but {SharedFunctionInfo} objects instead. Since
deoptimization data only contains the latter as literals, this by now
represents the fast path. All call sites requiring the former can use
the slow path via {JavaScriptFrame::Summarize} instead.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2626213002
Cr-Original-Commit-Position: refs/heads/master@{#42311}
Committed: https://chromium.googlesource.com/v8/v8/+/25a9364f25a40986f4d7266b1fe53a5921754f6a
Review-Url: https://codereview.chromium.org/2626213002
Cr-Commit-Position: refs/heads/master@{#42314}

R=titzer@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2635463002
Cr-Commit-Position: refs/heads/master@{#42313}

Revert of [runtime] Change JavaScriptFrame::GetFunctions interface. (patchset #2 id:20001 of https://codereview.chromium.org/2626213002/ )

Reason for revert:
Breaks compilation.

Original issue's description:
> [runtime] Change JavaScriptFrame::GetFunctions interface.
>
> This adapts the aformentioned interface to no longer return a list of
> {JSFunction} objects, but {SharedFunctionInfo} objects instead. Since
> deoptimization data only contains the latter as literals, this by now
> represents the fast path. All call sites requiring the former can use
> the slow path via {JavaScriptFrame::Summarize} instead.
>
> R=jarin@chromium.org
>
> Review-Url: https://codereview.chromium.org/2626213002
> Cr-Commit-Position: refs/heads/master@{#42311}
> Committed: https://chromium.googlesource.com/v8/v8/+/25a9364f25a40986f4d7266b1fe53a5921754f6a

TBR=jarin@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/2629113004
Cr-Commit-Position: refs/heads/master@{#42312}

This adapts the aformentioned interface to no longer return a list of
{JSFunction} objects, but {SharedFunctionInfo} objects instead. Since
deoptimization data only contains the latter as literals, this by now
represents the fast path. All call sites requiring the former can use
the slow path via {JavaScriptFrame::Summarize} instead.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2626213002
Cr-Commit-Position: refs/heads/master@{#42311}

R=machenbach@chromium.org, ahaas@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2632493002
Cr-Commit-Position: refs/heads/master@{#42310}

If a breakpoint is set on a wasm function, compile an interpreter entry
stub for it, and replace all calls to the original function by calls to
this interpreter entry.
Also, instantiate a wasm interpreter object on demand and set the
breakpoint there.

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

Review-Url: https://codereview.chromium.org/2625093004
Cr-Commit-Position: refs/heads/master@{#42309}

R=jgruber@chromium.org
BUG=v8::5836

Review-Url: https://codereview.chromium.org/2628963005
Cr-Commit-Position: refs/heads/master@{#42308}

[runtime] Mark maps created as a result of field type or representation generalization as migration targets.

BUG=v8:5444

Review-Url: https://codereview.chromium.org/2379633002
Cr-Commit-Position: refs/heads/master@{#42307}

BUG=chromium:673246
NOTRY=true
TBR=tandrii@chromium.org,mbarbella@chromium.org

Review-Url: https://codereview.chromium.org/2632623002
Cr-Commit-Position: refs/heads/master@{#42306}

The fuzz test cases now print the original test paths during execution.
This exploits this extra information and reports a hash of only one
original source file from the section that caused a difference.

The hash size is now limited to 3 to avoid possible duplicate
explosion, in case this doesn't work out as expected.

This prepares for patch 3 of:
https://chromereviews.googleplex.com/550337016/

BUG=chromium:673246
NOTRY=true
TBR=tandrii@chromium.org,mbarbella@chromium.org

Review-Url: https://codereview.chromium.org/2620343005
Cr-Commit-Position: refs/heads/master@{#42305}

Revert of PPC/s390: Internalize strings in-place (reland) (patchset #1 id:1 of https://codereview.chromium.org/2628643002/ )

Reason for revert:
Original CL https://codereview.chromium.org/2626893005 got reverted.

Original issue's description:
> PPC/s390: Internalize strings in-place (reland)
>
> Port 4c699e34
>
> Original Commit Message:
>
>     using newly introduced ThinStrings, which store a pointer to the actual,
>     internalized string they represent.
>
>     (Previously landed as #42168 / af51befe.
>
> R=jkummerow@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
> BUG=v8:4520
> LOG=N
>
> Review-Url: https://codereview.chromium.org/2628643002
> Cr-Commit-Position: refs/heads/master@{#42202}
> Committed: https://chromium.googlesource.com/v8/v8/+/aa0cb2eaf830e03fced1e00134fb65938df02388

TBR=jkummerow@chromium.org,joransiu@ca.ibm.com,jyan@ca.ibm.com,michael_dawson@ca.ibm.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:4520

Review-Url: https://codereview.chromium.org/2628923004
Cr-Commit-Position: refs/heads/master@{#42304}