Revision: 2ee4300

BUG=chromium:944971
LOG=N
NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true
[email protected]

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Code from ARES-6 Basic:

  ldur w11, [x5, v8#15]
  asr w11, w11, #1
  sxtw x11, w11

With this CL:

  ldur w11, [x5, v8#15]
  sbfx x11, x11, #1, v8#31

This increases performance of Ares6 Basic by ~2% on Cortex-A53.
Also reduces the snapshot by ~2000 instructions.

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Revision: 5ca49a2

BUG=chromium:1052721
NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true
[email protected]

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Create CI configuration

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Merged into 7.8

Revision: 580da89

BUG=v8:9146
LOG=N
NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true
[email protected]

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Merged: [test] make python recognize tools and tools/unittests as packages
Revision: 956c8a5

Merged: [test] create a CacheableSourceFileProcessor superclass for changed files
Revision: 11abc5e

Merged: [test] add an option for disabling linter cache in the pre_submit check
Revision: a5a381b

BUG=v8:8482
LOG=N
NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true
[email protected]

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(cherry picked from commit 02a06c4)

Bug: chromium:1014607
No-Try: true
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[email protected]

Bug: chromium:1029461
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Use a mutex guard when the unprotection is triggered from a compaction
space in which case it is actually parallel.

Main-thread only unprotection does not require acquiring the mutex.

The list itself is only used from the main thread and thus the actual
process does not require a mutex.

The issue was introduced in https://crrev.com/c/2966382

(cherry picked from commit 2982b4f)

Bug: v8:11982
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This fixes no-wasm builds.

NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true

Bug: chromium:1225258
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Revision: c65f0a7

BUG=chromium:822284
LOG=N
NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true
[email protected]

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(cherry picked from commit 95eda07)

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When inlining functions, we must create Phis for all mutable
cached values in the InstanceCache, because the return block
might have more than one predecessor, and possibly only some
of the paths leading to it have reloaded some cached values.

Originally reviewed-on: https://crrev.com/c/5116698

(cherry picked from commit 94ec61d)

Bug: chromium:1510626
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When an exception is not caught by the current stack and is forwarded to
the parent stack, treat it as a return stack-switch: retire the current
stack and mark the parent as the new active stack.

[email protected],[email protected]

Fixed: 363051803
(cherry picked from commit 6508440)

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Bug: 367734947
(cherry picked from commit 969cea3)

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Fix two issues related to sample-based profiling of JSPI stacks:

- The profiler reads the return addresses of the frames, but for the
  initial frame of a wasm stack this slot does not exist and is out of
  bounds. Complete the frame by pushing a fake empty return address to
  avoid the OOB.
- {IsValidStackAddress} relied on the {Isolate::wasm_stacks_} vector to
  validate that a given address belongs to at least one of the (possibly
  inactive/suspended) wasm stacks. However entries in this vector may be
  partially constructed/destructed when the stack sample is taken.
  The profiler does not support iterating multiple stacks yet anyway, so
  ignore inactive/suspended stacks for now and make some adjustments to
  correctly validate the active stack.

[email protected]

Bug: 392928805
(cherry picked from commit 970f83a)

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… is undefined

Port 32a6c8d

Original Commit Message:

    Even if the return type of an API function is `void`, there is still a
    return value in JavaScript, undefined.

    This CL hard-codes the return value in the assembly code of the
    `DeoptimizationEntry_LazyAfterFastCall` builtin. Ideally the return
    value is handled in a continuation builtin, as suggested in
    crbug.com/418936518, but that turned out to be more difficult than
    expected.

[email protected], [email protected], [email protected]
BUG=
LOG=N

(cherry picked from commit 189386b)

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Original change's description:
> [compiler][arm64] Fix Dup and Shuffle recognition
> 
> The 'dup and shuffle' optimization worked on the assumption that, for
> swizzles, we could drop the second argument and replace it with the
> result of the dup. This would result in the dup producing the eight
> most significant bytes and the canonical shuffle would produce the
> other eight.
> 
> However, because we are dealing with swizzles, it may be that the
> instruction used to implement the canonical shuffle doesn't read from
> two registers. In this case the dup is never read and so the top bytes
> are not what we expect.
> 
> Bug: 455592080
> Change-Id: Ic205b01dec1a82631b1de1fce2d98e82d9af3804
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/7095236
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> Commit-Queue: Darius Mercadier <[email protected]>
> Reviewed-by: Marja Hölttä <[email protected]>
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(cherry picked from commit b8ff29c)

Bug: 456116645,455592080
Change-Id: Ic205b01dec1a82631b1de1fce2d98e82d9af3804
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