This patch strengthens testing of classes by verifying that the binding
that they export externally follows block scoping, as opposed to var-style
scoping. The tests are based on existing tests for let and const.

R=adamk
LOG=N
BUG=v8:3305

Review URL: https://codereview.chromium.org/1286923002

Cr-Commit-Position: refs/heads/master@{#30140}

The operations were available on ARM64 and x86-32 but were unused.

It has been conjectured that nontemporals can be used for rowhammer-like bitflips more easily than regular load/store operations. It is therefore desirable to avoid generating these instructions in the future.

R= titzer, jochen, jln, Mark Seaborn, ruiq

Review URL: https://codereview.chromium.org/1276113002

Cr-Commit-Position: refs/heads/master@{#30139}

BUG=v8:4366
LOG=n

Review URL: https://codereview.chromium.org/1287543004

Cr-Commit-Position: refs/heads/master@{#30138}

Also add a bigger warning to the header comment for the Maybe version.

R=jochen@chromium.org

Review URL: https://codereview.chromium.org/1276353003

Cr-Commit-Position: refs/heads/master@{#30137}

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1282793002

Cr-Commit-Position: refs/heads/master@{#30136}

Instead of using a sequence

  if (something == null && !IS_UNDETECTABLE(something))) { ... }

which will be true if something is either null or undefined, it is
way simpler and way more efficient to just write

  if (something === null || something === (void 0)) { ... }

instead, which allows the compiler(s) to generate pretty decent code
without any need to resort to type feedback from a CompareNil IC.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1288623003

Cr-Commit-Position: refs/heads/master@{#30135}

We don't need it, as we can grab it from the shared function info.
Having it triggers an assertion if we define classes in native JS.

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

Review URL: https://codereview.chromium.org/1290703002

Cr-Commit-Position: refs/heads/master@{#30134}

TBR=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1287853004

Cr-Commit-Position: refs/heads/master@{#30133}

Support for undetectable strings was officially dropped in
https://codereview.chromium.org/916753002, but the compilers
weren't fixed properly.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1287983002

Cr-Commit-Position: refs/heads/master@{#30132}

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1283023002

Cr-Commit-Position: refs/heads/master@{#30131}

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1283653004

Cr-Commit-Position: refs/heads/master@{#30130}

Don't use IS_NULL_OR_UNDEFINED() for CHECK_OBJECT_COERCIBLE() because it
will also return true for undetectable objects, but use IS_NULL() and
IS_UNDEFINED() directly, which will only return true for null or
undefined (which matches the semantics of the abstract operation
CheckObjectCoercible).

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1287033002

Cr-Commit-Position: refs/heads/master@{#30129}

R=danno@chromium.org

Review URL: https://codereview.chromium.org/1285543002

Cr-Commit-Position: refs/heads/master@{#30128}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1283183002

Cr-Commit-Position: refs/heads/master@{#30127}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1289553002

Cr-Commit-Position: refs/heads/master@{#30126}

This tries to remove includes of "-inl.h" headers from normal ".h"
headers, thereby reducing the chance of any cyclic dependencies and
decreasing the average size of our compilation units.

Note that this change still leaves 7 violations of that rule in the
code. However there now is the "tools/check-inline-includes.sh" tool
detecting such violations.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1283033003

Cr-Commit-Position: refs/heads/master@{#30125}

R=bmeurer@chromium.org
BUG=chromium:517594
LOG=N

Review URL: https://codereview.chromium.org/1286143002

Cr-Commit-Position: refs/heads/master@{#30124}

Clang says: warning: 'const' type qualifier on return type has no effect
[-Wignored-qualifiers]

Review URL: https://codereview.chromium.org/1284013003

Cr-Commit-Position: refs/heads/master@{#30123}

In an initial attempt to implement sloppy mode lexical bindings,
functions were made lexically scoped in sloppy mode. However, the
ES2015 spec says that they need an additional hoisted var binding,
and further, it's not clear when we'll implement that behavior
or whether it's web-compatible.

This patch splits off function block scoping into a new, separate
flag called --harmony_sloppy_function. This change will enable the
possibility of testing and shipping this feature separately from
other block scoping-related features which don't have the same risks.

BUG=v8:4285
R=adamk
LOG=N

Review URL: https://codereview.chromium.org/1282093002

Cr-Commit-Position: refs/heads/master@{#30122}

BUG=v8:3575
R=adamk@chromium.org, rossberg@chromium.org
LOG=Y
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1283963002

Cr-Commit-Position: refs/heads/master@{#30121}

In ES6, direct eval() in sloppy mode uses the enclosing function-level
("var") scope for var-style bindings and a new lexical scope for lexical
bindings like let and class. This patch implements that feature by making
lexical bindings that are directly within an EVAL_SCOPE be on the local
scope rather than the enclosing one.

BUG=v8:4288
LOG=Y
R=adamk

Review URL: https://codereview.chromium.org/1274193004

Cr-Commit-Position: refs/heads/master@{#30120}

This way we can greatly simplify the different variants of ToObject in
our codebase and make them more uniform and robust.  Adding a new
primitive doesn't require finding and changing all those places again,
but it is sufficient to setup the constructor function index when
allocating the map.

We use the inobject properties field of Map, which is invalid primitive
maps anyway.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1276533003

Cr-Commit-Position: refs/heads/master@{#30119}

R=adamk
BUG=chromium:135066
LOG=N

Review URL: https://codereview.chromium.org/1279203002

Cr-Commit-Position: refs/heads/master@{#30118}

R=littledan@chromium.org, adamk@chromium.org
BUG=v8:3575
LOG=Y

Review URL: https://codereview.chromium.org/1283703004

Cr-Commit-Position: refs/heads/master@{#30117}

The previous approach to this (in 1b1de2d2) did not work well with
bots that intentionally run no tests. But I think this warning message
is still useful for developers.

Review URL: https://codereview.chromium.org/1281313004

Cr-Commit-Position: refs/heads/master@{#30116}

Reland: [turbofan] Various fixes to allow unboxed doubles as arguments in registers and on the stack.

OCL: https://codereview.chromium.org/1263033004/

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1284893002

Cr-Commit-Position: refs/heads/master@{#30115}

Also remove unused max_capcity_ field in old spaces.

BUG=chromium:518028,chromium:504854
LOG=n

Review URL: https://codereview.chromium.org/1284853003

Cr-Commit-Position: refs/heads/master@{#30114}

BUG=v8:4357
R=machenbach@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1285723003

Cr-Commit-Position: refs/heads/master@{#30113}

Revert of Debugger: clear shared function info list when recompiling for liveedit. (patchset #1 id:1 of https://codereview.chromium.org/1270313003/ )

Reason for revert:
Sorry for revert, but this change breaks one of the webkit-unit-tests.

Example here: https://storage.googleapis.com/chromium-layout-test-archives/V8-Blink_Win/1178/layout-test-results/inspector/sources/debugger/live-edit-no-reveal-diff.txt

Not sure if the old expectations were right, or the new ones are. :)

Original issue's description:
> Debugger: clear shared function info list when recompiling for liveedit.
>
> R=bmeurer@chromium.org
> BUG=chromium:517594
> LOG=N
>
> Committed: https://crrev.com/9eea3ef5147a5e15256093fb4c36a7598d60d128
> Cr-Commit-Position: refs/heads/master@{#30111}

TBR=bmeurer@chromium.org,yangguo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:517594

Review URL: https://codereview.chromium.org/1279613008

Cr-Commit-Position: refs/heads/master@{#30112}

R=bmeurer@chromium.org
BUG=chromium:517594
LOG=N

Review URL: https://codereview.chromium.org/1270313003

Cr-Commit-Position: refs/heads/master@{#30111}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1290453002

Cr-Commit-Position: refs/heads/master@{#30110}

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/1272933004

Cr-Commit-Position: refs/heads/master@{#30109}

First step to simplify the TypeofStub. This is similar to the
optimization that we use for ToNumber and ToString on Oddballs already.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1272763005

Cr-Commit-Position: refs/heads/master@{#30108}

There's no need to have one InstanceType per SIMD primitive type (this
will not scale long-term).  Also reduce the amount of code duplication
and make it more robust wrt adding new SIMD types.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1273353003

Cr-Commit-Position: refs/heads/master@{#30107}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1286653004

Cr-Commit-Position: refs/heads/master@{#30106}

This avoids many back-and-forth calls to the runtime.

This also slightly changes the way we avoid getters. Previously, we circumvent getting the name property of ReferenceError, SyntaxError and TypeError due to crbug/69187 (in order to avoid leaking information from those errors through a 'name' getter installed on their prototypes). Now we do that for all errors created by V8.

R=jkummerow@chromium.org, rossberg@chromium.org
BUG=crbug:513472, crbug:69187
LOG=N

Review URL: https://codereview.chromium.org/1281833002

Cr-Commit-Position: refs/heads/master@{#30105}

R=mstarzinger@chromium.org
BUG=chromium:517592
LOG=N

Review URL: https://codereview.chromium.org/1285793002

Cr-Commit-Position: refs/heads/master@{#30104}

The following errors come up when compiling v8
 with clang 3.7 on FreeBSD/amd64:

src/runtime/runtime-i18n.cc:629:37: error: reinterpret_cast from
'nullptr_t' to 'v8::internal::Smi *' is not allowed
  local_object->SetInternalField(1, reinterpret_cast<Smi*>(NULL));
                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

test/cctest/test-heap.cc:131:20: error: reinterpret_cast from
      'nullptr_t' to 'v8::internal::Object *' is not allowed
  Handle<Object> n(reinterpret_cast<Object*>(NULL), isolate);
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test/cctest/test-heap.cc:1989:18: error: reinterpret_cast from
      'nullptr_t' to 'Address' (aka 'unsigned char *') is not
      allowed
  Address base = reinterpret_cast<Address>(NULL);
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+add myself to the AUTHORS file.

BUG=

Review URL: https://codereview.chromium.org/1277353002

Cr-Commit-Position: refs/heads/master@{#30103}

This is the first step of turning the v8.h file into a normal header
instead of an include-the-world header. The new rule is that no other
header files are allowed to include v8.h, which is enforced by DEPS.

Also the number of includes inside the v8.h file has been drastically
reduced. Basically the last missing piece is the inclusion of the big
objects-inl.h file.

This in turn makes many headers follow the IWYU principle.

R=bmeurer@chromium.org,hpayer@chromium.org,titzer@chromium.org

Review URL: https://codereview.chromium.org/1282503003

Cr-Commit-Position: refs/heads/master@{#30102}

Revert of [turbofan] Various fixes to allow unboxed doubles as arguments in registers and on the stack. (patchset #7 id:120001 of https://codereview.chromium.org/1263033004/ )

Reason for revert:
This CL breaks MIPS (roll blocker).

https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20mipsel%20-%20sim/builds/2061/steps/Check/logs/Run_Int32_Select_1

Original issue's description:
> [turbofan] Various fixes to allow unboxed doubles as arguments in registers and on the stack.
>
> R=jarin@chromium.org
> BUG=
>
> Committed: https://crrev.com/71409be5395f867bbca0f6998bf6caa175cd8192
> Cr-Commit-Position: refs/heads/master@{#30091}

TBR=jarin@chromium.org,titzer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1284853002

Cr-Commit-Position: refs/heads/master@{#30101}