BUG=chromium:604044
LOG=Y

Review URL: https://codereview.chromium.org/1895123002

Cr-Commit-Position: refs/heads/master@{#35650}

In a full mark-compact GC, instead of copying memory to old space for
pages that have more than X% live bytes, we just move the whole page over to old
space.

X=70 (default value)

BUG=chromium:581412
LOG=N
TBR=hpayer@chromium.org

This reverts commit 8b333727.

Review URL: https://codereview.chromium.org/1901093002

Cr-Commit-Position: refs/heads/master@{#35649}

  port 81a1530e (r35642)

  original commit message:
  Before frame elision, we finalized the frame shape when assembling the
  prologue, which is also when we prepared the frame (saving sp, etc).

  The frame finalization only needs to happen once, and happens to be
  actually a set of idempotent operations. With frame elision, the logic for
  frame finalization was happening every time we constructed the frame.
  Albeit idempotent operations, the code would become hard to maintain.

  This change separates frame shape finalization from frame
  construction. When constructing the CodeGenerator, we finalize the
  frame. Subsequent access is to a const Frame*.

  Also renamed AssemblePrologue to AssembleConstructFrame, as
  suggested in the frame elision CR.

  Separating frame setup gave the opportunity to do away with
  architecture-independent frame aligning (which is something just arm64
  cares about), and also with stack pointer setup (also arm64). Both of
  these happen now at frame finalization on arm64.

  additional message:
  This CL also removed the temporary workaround for CL #35139 (53d51c52)

BUG=

Review URL: https://codereview.chromium.org/1900213004

Cr-Commit-Position: refs/heads/master@{#35648}

This moves the installation of the scope info object on the shared
function info into a separate helper to share common code. This is
preparatory work in order to reuse existing scope info objects.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1894023004

Cr-Commit-Position: refs/heads/master@{#35647}

This removes some obsolete conditions checking whether we are performing
concurrent OSR compilation. This feature has been removed some time ago.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1901163003

Cr-Commit-Position: refs/heads/master@{#35646}

Reland of Change calling convention of CallApiGetterStub to accept the AccessorInfo (patchset #1 id:1 of https://codereview.chromium.org/1906453002/ )

Reason for revert:
Needs other reverts too.

Original issue's description:
> Revert of Change calling convention of CallApiGetterStub to accept the AccessorInfo (patchset #8 id:140001 of https://codereview.chromium.org/1892533004/ )
>
> Reason for revert:
> Blocks roll: https://codereview.chromium.org/1896103002/
>
> Can also be seen on internal waterfall: https://chromegw.corp.google.com/i/internal.client.v8/builders/v8_cros_perf_1/builds/7558
>
> Original issue's description:
> > Change calling convention of CallApiGetterStub to accept the AccessorInfo
> >
> > MIPS port contributed by Balazs Kilvady <balazs.kilvady@imgtec.com>
> >
> > Committed: https://crrev.com/d2b0a4b727f77f97960c7fa71da3431591dc959f
> > Cr-Commit-Position: refs/heads/master@{#35606}
>
> TBR=rodolph.perfetta@arm.com,jkummerow@chromium.org,jacob.bramley@arm.com,verwaest@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true

TBR=rodolph.perfetta@arm.com,jkummerow@chromium.org,jacob.bramley@arm.com,verwaest@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/1903093003

Cr-Commit-Position: refs/heads/master@{#35645}

Revert of Change calling convention of CallApiGetterStub to accept the AccessorInfo (patchset #8 id:140001 of https://codereview.chromium.org/1892533004/ )

Reason for revert:
Blocks roll: https://codereview.chromium.org/1896103002/

Can also be seen on internal waterfall: https://chromegw.corp.google.com/i/internal.client.v8/builders/v8_cros_perf_1/builds/7558

Original issue's description:
> Change calling convention of CallApiGetterStub to accept the AccessorInfo
>
> MIPS port contributed by Balazs Kilvady <balazs.kilvady@imgtec.com>
>
> Committed: https://crrev.com/d2b0a4b727f77f97960c7fa71da3431591dc959f
> Cr-Commit-Position: refs/heads/master@{#35606}

TBR=rodolph.perfetta@arm.com,jkummerow@chromium.org,jacob.bramley@arm.com,verwaest@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/1906453002

Cr-Commit-Position: refs/heads/master@{#35644}

Previously we had to run SimplifiedLowering, ChangeLowering and
JSGenericLowering independently and exactly in this order to
achieve great performance for the common case of JSToNumber (i.e.
input is already a Smi or a HeapNumber). This phase ordering
problem already causes trouble with not being able to run the
generic lowering phase earlier, but also blocks proper plain
primitive ToNumber optimizations. So this properly integrates
JSToNumber into the truncation analysis and optimizes according
to the truncation (either Word32 or Float64).

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1901803002

Cr-Commit-Position: refs/heads/master@{#35643}

Before frame elision, we finalized the frame shape when assembling the
prologue, which is also when we prepared the frame (saving sp, etc).

The frame finalization only needs to happen once, and happens to be
actually a set of idempotent operations. With frame elision, the logic for
frame finalization was happening every time we constructed the frame.
Albeit idempotent operations, the code would become hard to maintain.

This change separates frame shape finalization from frame
construction. When constructing the CodeGenerator, we finalize the
frame. Subsequent access is to a const Frame*.

Also renamed AssemblePrologue to AssembleConstructFrame, as
suggested in the frame elision CR.

Separating frame setup gave the opportunity to do away with
architecture-independent frame aligning (which is something just arm64
cares about), and also with stack pointer setup (also arm64). Both of
these happen now at frame finalization on arm64.

BUG=

Review URL: https://codereview.chromium.org/1843143002

Cr-Commit-Position: refs/heads/master@{#35642}

  port 59546149 (r35632)

  original commit message:
  Now that all 'const' declarations are of the ES2015 variety, the only
  use of CONST_LEGACY is for function name bindings in sloppy mode
  named function expressions.

  This patch aims to delete all code meant to handle other cases, which
  mostly had to do with hole initialization/hole checks. Since function
  name bindings are initialized at entry to a function, it's impossible
  to ever observe one in an uninitialized state.

  To simplify the patch further, it removes the `IMPORT` VariableMode,
  as it's not likely to be needed (IMPORT is identical to CONST for
  the purpose of VariableMode).

BUG=

Review URL: https://codereview.chromium.org/1902943003

Cr-Commit-Position: refs/heads/master@{#35641}

  port 623ad7de (r35618)

  original commit message:
  Removes the register file machine register from the interpreter and
  replaces it will loads from the parent frame pointer. As part of this
  change the raw operand values for register values changes to enable the
  interpreter to keep using the operand value as the offset from the
  parent frame pointer.

BUG=

Review URL: https://codereview.chromium.org/1903093002

Cr-Commit-Position: refs/heads/master@{#35640}

In JSTypedLowering we insert JSToNumber nodes for implicit type
conversions, which can potentially throw (i.e. the input not statically
known to be a plain primitive).

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1900383002

Cr-Commit-Position: refs/heads/master@{#35639}

Review URL: https://codereview.chromium.org/1900043003

Cr-Commit-Position: refs/heads/master@{#35638}

Port 623ad7de

Original commit message:

    Removes the register file machine register from the interpreter and
    replaces it will loads from the parent frame pointer. As part of this
    change the raw operand values for register values changes to enable the
    interpreter to keep using the operand value as the offset from the
    parent frame pointer.

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

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1901763004

Cr-Commit-Position: refs/heads/master@{#35637}

Port d0ccddd0

Original commit message:
       First version of the new generators implementation.

       Behind --ignition-generators. Does not yet support Turbofan.

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

Review URL: https://codereview.chromium.org/1899283002

Cr-Commit-Position: refs/heads/master@{#35636}

Port 59546149

Original commit message:

    Now that all 'const' declarations are of the ES2015 variety, the only
    use of CONST_LEGACY is for function name bindings in sloppy mode
    named function expressions.

    This patch aims to delete all code meant to handle other cases, which
    mostly had to do with hole initialization/hole checks. Since function
    name bindings are initialized at entry to a function, it's impossible
    to ever observe one in an uninitialized state.

    To simplify the patch further, it removes the `IMPORT` VariableMode,
    as it's not likely to be needed (IMPORT is identical to CONST for
    the purpose of VariableMode).

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

BUG=
LOG=N

Review URL: https://codereview.chromium.org/1902163003

Cr-Commit-Position: refs/heads/master@{#35635}

Port d2b0a4b7

Original commit message:

    MIPS port contributed by Balazs Kilvady <balazs.kilvady@imgtec.com>;

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

BUG=
LOG=N

Review URL: https://codereview.chromium.org/1895193003

Cr-Commit-Position: refs/heads/master@{#35634}

[15.2.1.11 Static Semantics:
LexicallyDeclaredNames](https://tc39.github.io/ecma262/#sec-module-semantics-static-semantics-lexicallydeclarednames)
(in contrast with its definition for StatementListItem) makes no
explicit provision for HoistableDeclarations. This means that function
declarations are treated as lexically scoped in module code, as
described in section 15.2.1.11's informative note:

> At the top level of a function, or script, function declarations are
> treated like var declarations rather than like lexical declarations.

BUG=v8:4884
LOG=N
R=adamk@chromium.org

Review URL: https://codereview.chromium.org/1851673007

Cr-Commit-Position: refs/heads/master@{#35633}

Now that all 'const' declarations are of the ES2015 variety, the only
use of CONST_LEGACY is for function name bindings in sloppy mode
named function expressions.

This patch aims to delete all code meant to handle other cases, which
mostly had to do with hole initialization/hole checks. Since function
name bindings are initialized at entry to a function, it's impossible
to ever observe one in an uninitialized state.

To simplify the patch further, it removes the `IMPORT` VariableMode,
as it's not likely to be needed (IMPORT is identical to CONST for
the purpose of VariableMode).

Review URL: https://codereview.chromium.org/1895973002

Cr-Commit-Position: refs/heads/master@{#35632}

Port d412cfa2

Original commit message:
    [Atomics] Remove Atomics code stubs; use TF ops

    Reland of (https://codereview.chromium.org/1891033002)

    This is a much cleaner solution, which won't require nearly as much
    architecture-specific code. Thanks bmeurer@!

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

BUG=v8:4614
LOG=N

Review URL: https://codereview.chromium.org/1899033002

Cr-Commit-Position: refs/heads/master@{#35631}

Prior to 89d7bfda we always just collected the code offset and computed the
source position lazily. However, for local eval we already have the source
position ready, so we can just store that. For global eval we still have to
compute from the code offset. This CL changes the computation to be done only
on demand.

R=mstarzinger@chromium.org
BUG=chromium:604646
LOG=N

Review URL: https://codereview.chromium.org/1903463002

Cr-Commit-Position: refs/heads/master@{#35630}

In addition to top source-destination pairs,
bytecode_dispatches_report.py now prints the hottest bytecode handlers
by the number of times they are executed and dispatch to another one,
regardless of the dispatch target.

Be aware that this figure does not match the number of times a handler
is executed for those which may not or will never dispatch, e.g.
Return or Throw.

BUG=v8:4899
LOG=N

Review URL: https://codereview.chromium.org/1875263004

Cr-Commit-Position: refs/heads/master@{#35629}

This prepares a patch to throw actual errors instead of just strings on
wasm traps. In order to accomplish this, the messages need to be known
to the runtime, as the generated code will just pass the message id.

R=mstarzinger@chromium.org, titzer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1880493002

Cr-Commit-Position: refs/heads/master@{#35628}

Without CL debugger on StepNext adds breakpoint to function where throw instruction is located. In case of StepNext we will skip pause in this function because StepNext shouldn't break in a deeper frame.

BUG=chromium:604495
R=yangguo@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/1894263002

Cr-Commit-Position: refs/heads/master@{#35627}

This is a bit unfortunate, but otherwise we would have to include
objects.h before message.h, since for the initialization of a Handle<T>,
the compiler checks that Object* can be assigned to T*. So it would
need to know about the inheritance for initializing Handle<Script> and
Handle<JSFunction>.

R=mstarzinger@chromium.org, titzer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1872373002

Cr-Commit-Position: refs/heads/master@{#35626}

The guard in JSFunction::MarkForOptimization checking whether a function
is being debugged is overly protective. The compilation pipeline will
bailout itself in that circumstance. Having the runtime behave similar
makes sure the debugger observes a situation closer to reality.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1900743003

Cr-Commit-Position: refs/heads/master@{#35625}

This cctest triggers a detailed stack trace containing WASM frames.

R=jfb@chromium.org, mstarzinger@chromium.org, titzer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1875083002

Cr-Commit-Position: refs/heads/master@{#35624}

This stops printing a log line for when a lookup in the optimized code
map did not yield a result. Logging such a negative result that will
inevitably trigger a compile anyways has little benefit and just spams
the console unnecessarily.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1904433002

Cr-Commit-Position: refs/heads/master@{#35623}

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1902013002

Cr-Commit-Position: refs/heads/master@{#35622}

This makes them show up in the stack trace. Otherwise the stack frames
are identified as type STUB, and skipped by the iterator.

R=ahaas@chromium.org, jfb@chromium.org, titzer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1878573003

Cr-Commit-Position: refs/heads/master@{#35621}

As the code on the blink side sits down, we realize we don't need isolate arg
anymore. As the heap tracer is set per isolate, it can actually be confusing if
the isolate passed as argument is always the same as the isolate the heap tracer
was set for. Wdyt?

BUG=468240
LOG=no

Review URL: https://codereview.chromium.org/1900953003

Cr-Commit-Position: refs/heads/master@{#35620}

Revert of 🏄 [heap] Add page evacuation mode for new->old (patchset #21 id:800001 of https://codereview.chromium.org/1863983002/ )

Reason for revert:
[Sheriff] Breaks:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20nosnap%20-%20debug/builds/102

Original issue's description:
> [heap] Add page evacuation mode for new->old
>
> In a full mark-compact GC, instead of copying memory to old space for
> pages that have more than X% live bytes, we just move the whole page over to old
> space.
>
> X=70 (default value)
>
> BUG=chromium:581412
> LOG=N
>
> Committed: https://crrev.com/0d7e23a6edd3822970983030a77a5b80cd337911
> Cr-Commit-Position: refs/heads/master@{#35610}

TBR=hpayer@chromium.org,ulan@chromium.org,mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:581412

Review URL: https://codereview.chromium.org/1896883003

Cr-Commit-Position: refs/heads/master@{#35619}

Removes the register file machine register from the interpreter and
replaces it will loads from the parent frame pointer. As part of this
change the raw operand values for register values changes to enable the
interpreter to keep using the operand value as the offset from the
parent frame pointer.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1894063002

Cr-Commit-Position: refs/heads/master@{#35618}

... such that they can be reused from other tests.

R=ahaas@chromium.org, jfb@chromium.org, titzer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1876783002

Cr-Commit-Position: refs/heads/master@{#35617}

This avoids custom compilation of receiver handlers for api getters.

BUG=

Review URL: https://codereview.chromium.org/1895093002

Cr-Commit-Position: refs/heads/master@{#35616}

Till now, they were just skipped. With this patch, they now show up in
the DevTools on uncaught Errors with function name <WASM> and no line
number or file name information (see new test case:
https://chromiumcodereview.appspot.com/1875083002).

R=jfb@chromium.org, titzer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1865553004

Cr-Commit-Position: refs/heads/master@{#35615}

BUG=v8:4437,v8:2899,chromium:604310
LOG=n

Review URL: https://codereview.chromium.org/1402373002

Cr-Commit-Position: refs/heads/master@{#35614}

Port d412cfa2

BUG=

Review URL: https://codereview.chromium.org/1899783003

Cr-Commit-Position: refs/heads/master@{#35613}

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1901653003

Cr-Commit-Position: refs/heads/master@{#35612}

  port d2b0a4b7 (r35606)

  original commit message:
  MIPS port contributed by Balazs Kilvady <balazs.kilvady@imgtec.com>

BUG=

Review URL: https://codereview.chromium.org/1897823005

Cr-Commit-Position: refs/heads/master@{#35611}