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[v14.x] Backport V8 8.6 LTS commits #38275

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[v14.x] Backport V8 8.6 LTS commits #38275

wants to merge 32 commits into from

Commits on Apr 27, 2021

  1. deps: V8: cherry-pick 516b5d3f9cfe 

    Original commit message:

    Merged: [wasm-simd][x64] Check for register when emitting shuffles

    Some shuffles take have either register or memory operand for second
    input, but the codegen incorrectly assumes that it is always a register.

    Bug: v8:10824
    (cherry picked from commit ddf30bea13902829eeb71aa0ec747155e27e5a68)

    Change-Id: I897c4290a8b91ff2ab839e98b16a9696c0bae511
    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2391280
    Reviewed-by: Bill Budge <bbudge@chromium.org>
    Commit-Queue: Zhi An Ng <zhin@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{#6}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@516b5d3
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  2. deps: V8: cherry-pick a59e3ac1d7fa 

    Original commit message:

    Merged: [compiler] Fix bug in SimplifiedLowering's overflow computation

    Revision: e371325bcb03f20a362ebfa48225159702c6fde7

    BUG=chromium:1126249
    NOTRY=true
    NOPRESUBMIT=true
    NOTREECHECKS=true
    R=tebbi@chromium.org

    Change-Id: I411d9233f77992e73da12784cef59c885999b556
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2415988
    Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
    Commit-Queue: Georg Neis <neis@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{#8}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@a59e3ac
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  3. deps: V8: cherry-pick abb4d0a431c0 

    Original commit message:

    Merged: [turbofan] Fix bug in inlining

    Revision: 219b28bfe2ea76de63f034eb75b67e8ded339d94

    BUG=chromium:1127319
    NOTRY=true
    NOPRESUBMIT=true
    NOTREECHECKS=true
    R=tebbi@chromium.org

    Change-Id: I98e77bac81e2cf822a4a4987115e0cf01b1dbc52
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2416383
    Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
    Commit-Queue: Georg Neis <neis@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{#12}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@abb4d0a
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  4. deps: V8: cherry-pick 33f4064dbad3 

    Original commit message:

    Merged: Squashed multiple commits.

    Merged: Prepare renaming "V8 Linux64 TSAN - concurrent marking" bot
    Revision: 165d8f5b5ab5ba6fa19acd7ae6b17aa1a1b18428

    Merged: [test] Remove entry of renamed builder
    Revision: 375579f940b96224b2c525a6133650b760a5d865

    NOTRY=true
    NOPRESUBMIT=true
    NOTREECHECKS=true
    TBR=neis@chromium.org

    Change-Id: If7c8296c495d087c2e4dc6cde3512bc3f8a469fc
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2418098
    Reviewed-by: Michael Achenbach <machenbach@chromium.org>
    Reviewed-by: Georg Neis <neis@chromium.org>
    Commit-Queue: Michael Achenbach <machenbach@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{#14}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@33f4064
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  5. deps: V8: cherry-pick d724820c1d5d 

    Original commit message:

    Merged: Squashed multiple commits.

    Merged: [test] Make finding build directory more flexible
    Revision: 4f015e85faf1d64466eafd897d1d59b1d77071f3

    Merged: [test] Use the correct precedence for choosing the build directory
    Revision: 7b24b13981e411602fc77db1305d0ae034a92fd8

    Merged: [test] Add fallback to legacy output directory
    Revision: bf3adea58aab3d21e36e23c60e1e0bbc994cd5b8

    Merged: [gcmole] Fix gcmole after property change
    Revision: c87bdbcf0d1d8f8bcc927f6b364d27e72c22736d

    Merged: [test] Overhaul mode processing in test runner
    Revision: 608b732d141689e8e10ee918afc8ed1fae1ab80c

    Merged: [test] Switch to flattened json output
    Revision: 373a9a8cfc8db3ef65fcdca0ec0c4ded9e4acc89

    BUG=chromium:1132088,v8:10893
    NOTRY=true
    NOTREECHECKS=true
    R=liviurau@chromium.org

    Change-Id: I3c1de04ca4fe62e36da29e706a20daec0b3d4d98
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2461745
    Reviewed-by: Liviu Rau <liviurau@chromium.org>
    Commit-Queue: Michael Achenbach <machenbach@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#20}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@d724820
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  6. deps: V8: cherry-pick 6a4cd97d6691 

    Original commit message:

    Merged: [parser] Fix AST func reindexing for function fields

    AST reindexing has to skip visiting fields that are already in the
    member initializer, as they will have already been visited when
    visiting said initializer. This is the case for private fields and
    fields with computed names.

    However, the reindexer was incorrectly assuming that all properties
    with a FunctionLiteral value are methods (and thus not fields, and
    can safely be visited). This is not the case for fields with
    function expression values.

    Now, we correctly use the class property's "kind" when making this
    visitation decision.

    (cherry picked from commit a769ea7a4462115579ba87bc16fbffbae01310c1)

    Bug: chromium:1132111
    Tbr: leszeks@chromium.org
    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Change-Id: I33ac5664bb5334e964d351de1ba7e2c57f3398f8
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2465056
    Commit-Queue: Adam Klein <adamk@chromium.org>
    Reviewed-by: Adam Klein <adamk@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#24}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@6a4cd97
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  7. deps: V8: cherry-pick ed3eedae33d0 

    Original commit message:

    Merged: [ia32][wasm-simd] Fix aligned moves in codegen

    For SIMD instructions that use aligned moves (like movaps or movapd), we
    don't have correct memory alignment for SIMD moves yet. Switch to to
    movupd.

    TBR=bbudge@chromium.org,adamk@chromium.org
    Bug: v8:9198
    Bug: v8:10831
    Bug: chromium:1134039
    (cherry picked from commit ab23ff3c0eed141361365241d13e3211efd608cf)

    Change-Id: Icc038b4a32364b8bc66b723403ccc11f954b080d
    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2469600
    Commit-Queue: Zhi An Ng <zhin@chromium.org>
    Reviewed-by: Zhi An Ng <zhin@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#30}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@ed3eeda
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  8. deps: V8: cherry-pick 8c725f7b5bbf 

    Original commit message:

    Merged: [codegen] Skip invalid optimization in tail calls

    Preparing for tail call is usually done by emitting the gap moves and
    then moving the stack pointer to its new position. An optimization
    consists in moving the stack pointer first and transforming some of the
    moves into pushes. In the attached case it looks like this (arm):

    138  add sp, sp, nodejs#40
    13c  str r6, [sp, #-4]!
    140  str r6, [sp, #-4]!
    144  str r6, [sp, #-4]!
    148  str r6, [sp, #-4]!
    14c  str r6, [sp, #-4]!
    ...
    160  vldr d1, [sp - 4*3]

    The last line is a gap reload, but because the stack pointer was already
    moved, the slot is now below the stack pointer. This is invalid and
    triggers this DCHECK:

    Fatal error in ../../v8/src/codegen/arm/assembler-arm.cc, line 402
    Debug check failed: 0 <= offset (0 vs. -12).

    A comment already explains that we skip the optimization if the gap
    contains stack moves to prevent this, but the code only checks for
    non-FP slots. This is fixed by replacing "source.IsStackSlot()" with
    "source.IsAnyStackSlot()":

    108  vldr d1, [sp + 4*2]
    ...
    118  str r0, [sp, #+36]
    11c  str r0, [sp, #+32]
    120  str r0, [sp, #+28]
    124  str r0, [sp, #+24]
    128  str r0, [sp, #+20]
    ...
    134  add sp, sp, nodejs#20

    TBR=​jgruber@chromium.org

    (cherry picked from commit 7506e063d0d7fb00e4b9c06735c91e1953296867)

    Change-Id: I66ed6187755af956e245207e940c83ea0697a5e6
    Bug: chromium:1137608
    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2505976
    Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
    Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#42}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@8c725f7
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  9. deps: V8: cherry-pick 3ba21a17ce2f 

    Original commit message:

    Merged: [map] Try to in-place transition during map update

    When searching for a target map during map update, attempt to
    update field representations in-place to the more general
    representation, where possible.

    Bug: chromium:1143772
    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true

    TBR=leszeks@chromium.org, fgm@chromium.org
    (cherry picked from commit 8e3ae62d294818733a0322d8e8abd53d4e410f19)

    Change-Id: I659890c2f08c14d1cf94242fb875c19837df2dbb
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2509599
    Reviewed-by: Francis McCabe <fgm@chromium.org>
    Reviewed-by: Michael Hablich <hablich@chromium.org>
    Reviewed-by: Bill Budge <bbudge@chromium.org>
    Reviewed-by: Igor Sheludko <ishell@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#44}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@3ba21a1
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  10. deps: V8: cherry-pick c449afa1953b 

    Original commit message:

    Merged: [compiler] Fix a bug in SimplifiedLowering

    Revision: ba1b2cc09ab98b51ca3828d29d19ae3b0a7c3a92

    BUG=chromium:1150649
    NOTRY=true
    NOPRESUBMIT=true
    NOTREECHECKS=true

    (cherry picked from commit 966d0eb98dd2630e861d267288fa2c63be9b5465)

    Change-Id: Ic903e61ee00b7c240bed96633d1eab582c295308
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2557985
    Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
    Commit-Queue: Georg Neis <neis@chromium.org>
    Cr-Original-Commit-Position: refs/branch-heads/8.8@{#10}
    Cr-Original-Branched-From: 2dbcdc105b963ee2501c82139eef7e0603977ff0-refs/heads/8.8.278@{#1}
    Cr-Original-Branched-From: 366d30c99049b3f1c673f8a93deb9f879d0fa9f0-refs/heads/master@{#71094}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2624749
    Reviewed-by: Jana Grill <janagrill@chromium.org>
    Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
    Commit-Queue: Victor-Gabriel Savu <vsavu@google.com>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#52}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@c449afa
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  11. deps: V8: cherry-pick 412ac52d8246 

    Original commit message:

    [bigint] Fix possibly-uninitialized leading digit on right shift

    (cherry picked from commit e82a3b4d47a93ab64f07d8c03e3cd17b6b961c3f)

    (cherry picked from commit 1162c460dee4218abd798b51b88926aef5c8bd61)

    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Fixed: chromium:1151890
    Change-Id: I26f5c76494a9ff3f5a141f381e1c9a543e368571
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2561618
    Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
    Commit-Queue: Georg Neis <neis@chromium.org>
    Reviewed-by: Georg Neis <neis@chromium.org>
    Cr-Original-Original-Commit-Position: refs/heads/master@{#71422}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2565245
    Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
    Cr-Original-Commit-Position: refs/branch-heads/8.7@{nodejs#57}
    Cr-Original-Branched-From: 0d81cd72688512abcbe1601015baee390c484a6a-refs/heads/8.7.220@{#1}
    Cr-Original-Branched-From: 942c2ef85caef00fcf02517d049f05e9a3d4b440-refs/heads/master@{#70196}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2624611
    Commit-Queue: Victor-Gabriel Savu <vsavu@google.com>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#54}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@412ac52
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  12. deps: V8: cherry-pick 482e5c7750b3 

    Original commit message:

    Merged: [wasm-simd] Fix loading fp pair registers

    We were incorrectly clearing the high reg from the list of regs to load.
    The intention was to prevent double (and incorrect) loading - loading
    128 bits from the low fp and the loading 128 bits from the high fp.
    But this violates the assumption that the two regs in a pair would be
    set or unset at the same time.

    The fix here is to introduce a new enum for register loads, a nop, which
    does nothing. The high fp of the fp pair will be tied to this nop, so as
    we iterate down the reglist, we load 128 bits using the low fp, then
    don't load anything for the high fp.

    Bug: chromium:1161654
    (cherry picked from commit 8c698702ced0de085aa91370d8cb44deab3fcf54)

    (cherry picked from commit ffd6ff5a61b9343ccc62e6c03b71a33682c6084d)

    Change-Id: Ib8134574b24f74f24ca9efd34b3444173296d8f1
    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2619416
    Commit-Queue: Zhi An Ng <zhin@chromium.org>
    Reviewed-by: Clemens Backes <clemensb@chromium.org>
    Cr-Original-Commit-Position: refs/branch-heads/8.8@{nodejs#28}
    Cr-Original-Branched-From: 2dbcdc105b963ee2501c82139eef7e0603977ff0-refs/heads/8.8.278@{#1}
    Cr-Original-Branched-From: 366d30c99049b3f1c673f8a93deb9f879d0fa9f0-refs/heads/master@{#71094}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2649176
    Reviewed-by: Victor-Gabriel Savu <vsavu@google.com>
    Commit-Queue: Achuith Bhandarkar <achuith@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#55}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@482e5c7
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  13. deps: V8: cherry-pick ad2c5dae4688 

    Original commit message:

    Merged: [deoptimizer] Stricter checks during deoptimization

    Revision: 506e893b812e03dbebe34b11d8aa9d4eb6869d89

    BUG=chromium:1161357
    NOTRY=true
    NOPRESUBMIT=true
    NOTREECHECKS=true
    R=​mythria@chromium.org

    (cherry picked from commit 44d052c19df0801fafdf2be54c899db65e79c67a)

    Change-Id: I97b69ae11d85bc0acd4a0c7bd28e1b692433de80
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2616219
    Reviewed-by: Mythri Alle <mythria@chromium.org>
    Commit-Queue: Georg Neis <neis@chromium.org>
    Cr-Original-Commit-Position: refs/branch-heads/8.8@{nodejs#23}
    Cr-Original-Branched-From: 2dbcdc105b963ee2501c82139eef7e0603977ff0-refs/heads/8.8.278@{#1}
    Cr-Original-Branched-From: 366d30c99049b3f1c673f8a93deb9f879d0fa9f0-refs/heads/master@{#71094}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2649571
    Reviewed-by: Victor-Gabriel Savu <vsavu@google.com>
    Commit-Queue: Achuith Bhandarkar <achuith@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#56}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@ad2c5da
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  14. deps: V8: cherry-pick 5c6c99a8dc72 

    Original commit message:

    Merged: [liftoff][arm] Release temp registers after use

    The {ParallelRegisterMove} at the end of {AtomicLoad} might need a
    temporary scratch register for spilling values to the stack. Make sure
    that one is available by giving up the scratch register used for the
    address of the atomic access.

    TBR=​ahaas@chromium.org

    (cherry picked from commit 63166010061d2af4fef6a713d448ebf074a9d2cb)

    (cherry picked from commit 953f7a9dcb1425616e3be67fdfe6ef8d820f0daa)

    Bug: chromium:1153442
    Change-Id: Ie312b37857e226058581b300b5adb1f14476c155
    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2584959
    Reviewed-by: Clemens Backes <clemensb@chromium.org>
    Commit-Queue: Clemens Backes <clemensb@chromium.org>
    Cr-Original-Commit-Position: refs/branch-heads/8.7@{nodejs#60}
    Cr-Original-Branched-From: 0d81cd72688512abcbe1601015baee390c484a6a-refs/heads/8.7.220@{#1}
    Cr-Original-Branched-From: 942c2ef85caef00fcf02517d049f05e9a3d4b440-refs/heads/master@{#70196}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2656263
    Reviewed-by: Victor-Gabriel Savu <vsavu@google.com>
    Commit-Queue: Artem Sumaneev <asumaneev@google.com>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#58}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@5c6c99a
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  15. deps: V8: cherry-pick e527ba4bf8af 

    Original commit message:

    Merged: [interpreter] Store accumulator to callee after optional chain checks

    Revision: df98901c19ce17ca995ee6750379b0f004210d68

    BUG=chromium:1171954
    NOTRY=true
    NOPRESUBMIT=true
    NOTREECHECKS=true
    R=​rmcilroy@chromium.org

    (cherry picked from commit f309db52c2ccab8c9a04fcd236e89deb077061f9)

    Change-Id: If09e1503ca07b47a112362495ec0bb9d502118c9
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2674008
    Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
    Cr-Original-Commit-Position: refs/branch-heads/8.9@{nodejs#33}
    Cr-Original-Branched-From: 16b9bbbd581c25391981aa03180b76aa60463a3e-refs/heads/8.9.255@{#1}
    Cr-Original-Branched-From: d16a2a688498bd1c3e6a49edb25d8c4ca56232dc-refs/heads/master@{#72039}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2706110
    Reviewed-by: Mythri Alle <mythria@chromium.org>
    Commit-Queue: Achuith Bhandarkar <achuith@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#62}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@e527ba4
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  16. deps: V8: cherry-pick 53c4d057974a 

    Original commit message:

    Reland "[regexp] Hard-crash on invalid offsets in AdvanceCurrentPosition"

    This is a reland of 164cf80bbb0a6e091300bfc4cbbe70a6e6bd3e49

    The reland fixes UB (left-shift of negative integer type) with a
    static_cast<uint32_t>.

    Original change's description:
    > [regexp] Hard-crash on invalid offsets in AdvanceCurrentPosition
    >
    > Drive-by: Range checks in `Emit(byte, twenty_four_bits)` to ensure the
    > given packed bits actually fit into 24 bits.
    >
    > Bug: chromium:1166138
    > Change-Id: I2e711e6466bb48d7b9897f68dfe621d12bd92508
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2625877
    > Commit-Queue: Jakob Gruber <jgruber@chromium.org>
    > Commit-Queue: Leszek Swirski <leszeks@chromium.org>
    > Auto-Submit: Jakob Gruber <jgruber@chromium.org>
    > Reviewed-by: Leszek Swirski <leszeks@chromium.org>
    > Cr-Commit-Position: refs/heads/master@{#72064}

    (cherry picked from commit ff8d0f92d423774cf773b5b4fb48b6744971e27a)

    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Tbr: leszeks@chromium.org
    Bug: chromium:1166138
    Change-Id: I514495e14bb99dfc9588fdb4a9f35d67d8d64acb
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2626663
    Reviewed-by: Jakob Gruber <jgruber@chromium.org>
    Commit-Queue: Jakob Gruber <jgruber@chromium.org>
    Cr-Original-Commit-Position: refs/heads/master@{#72088}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2742954
    Reviewed-by: Jana Grill <janagrill@chromium.org>
    Commit-Queue: Victor-Gabriel Savu <vsavu@google.com>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#64}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@53c4d05
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  17. deps: V8: cherry-pick d2283ba066ba 

    Original commit message:

    [macro-assembler] Avoid using the isolate in CallRecordWriteStub

    CallRecordWriteStub is used in a background compile thread for
    JS-to-Wasm wrapper compilation, so it should avoid accessing the
    isolate.
    Call the builtin using CallBuiltin which does not require a Handle<Code>
    object and instead gets the call target directly from the embedded data.

    R=​clemensb@chromium.org

    (cherry picked from commit 6b3994e8507b32dfb956329395dbe33a2a8fee14)

    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Bug: chromium:1146813
    Change-Id: I4ee59084e4184f2e9039208e4e6db43482cefde6
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2593333
    Reviewed-by: Clemens Backes <clemensb@chromium.org>
    Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
    Cr-Original-Commit-Position: refs/heads/master@{#71785}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2731535
    Commit-Queue: Victor-Gabriel Savu <vsavu@google.com>
    Reviewed-by: Jana Grill <janagrill@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#66}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@d2283ba
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  18. deps: V8: cherry-pick 813066946968 

    Original commit message:

    [macro-assembler] Avoid using the isolate in CallRecordWriteStub

    CallRecordWriteStub is used in a background compile thread for
    JS-to-Wasm wrapper compilation, so it should avoid accessing the
    isolate.
    Call the builtin using CallBuiltin which does not require a Handle<Code>
    object and instead gets the call target directly from the embedded data.

    R=​clemensb@chromium.org

    (cherry picked from commit 6b3994e8507b32dfb956329395dbe33a2a8fee14)

    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Bug: chromium:1146813
    Change-Id: I4ee59084e4184f2e9039208e4e6db43482cefde6
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2593333
    Reviewed-by: Clemens Backes <clemensb@chromium.org>
    Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
    Cr-Original-Commit-Position: refs/heads/master@{#71785}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2731535
    Commit-Queue: Victor-Gabriel Savu <vsavu@google.com>
    Reviewed-by: Jana Grill <janagrill@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#66}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@8130669
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  19. deps: V8: cherry-pick 5678ebe8f6c4 

    Original commit message:

    [M86 LTS] Disable failing tests

    Disable failing tests backported from ToT. No existing tests
    are disabled.

    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Bug: None
    Change-Id: I94d2cd4827ce6fd1875c66912b4841a4a7c72ab3
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2764754
    Reviewed-by: Artem Sumaneev <asumaneev@google.com>
    Commit-Queue: Victor-Gabriel Savu <vsavu@google.com>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#70}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@5678ebe
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  20. deps: V8: cherry-pick 254c7945eea2 

    Original commit message:

    Merged: [deoptimizer] Fix bug in OptimizedFrame::Summarize

    Revision: 3353a7d0b017146d543434be4036a81aaf7d25ae

    BUG=chromium:1182647
    NOTRY=true
    NOPRESUBMIT=true
    NOTREECHECKS=true
    R=​bmeurer@chromium.org

    (cherry picked from commit c0c96b768a7d3463b11403874549e6496529740d)

    Change-Id: I86abd6a3f34169be5f99aa9f54bb7bb3706fa85a
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2780300
    Reviewed-by: Georg Neis <neis@chromium.org>
    Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
    Commit-Queue: Georg Neis <neis@chromium.org>
    Cr-Original-Commit-Position: refs/branch-heads/8.9@{nodejs#49}
    Cr-Original-Branched-From: 16b9bbbd581c25391981aa03180b76aa60463a3e-refs/heads/8.9.255@{#1}
    Cr-Original-Branched-From: d16a2a688498bd1c3e6a49edb25d8c4ca56232dc-refs/heads/master@{#72039}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2794427
    Reviewed-by: Victor-Gabriel Savu <vsavu@google.com>
    Commit-Queue: Artem Sumaneev <asumaneev@google.com>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#72}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@254c794
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  21. deps: V8: cherry-pick 3066b7b2fcb3 

    Original commit message:

    [LTS-M86][compiler][x64] Fix bug in InstructionSelector::ChangeInt32ToInt64

    (cherry picked from commit 02f84c745fc0cae5927a66dc4a3e81334e8f60a6)

    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Bug: chromium:1196683
    Change-Id: Ib4ea738b47b64edc81450583be4c80a41698c3d1
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2820971
    Commit-Queue: Georg Neis <neis@chromium.org>
    Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
    Cr-Original-Commit-Position: refs/heads/master@{#73903}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2821959
    Commit-Queue: Jana Grill <janagrill@chromium.org>
    Reviewed-by: Georg Neis <neis@chromium.org>
    Reviewed-by: Victor-Gabriel Savu <vsavu@google.com>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#75}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@3066b7b
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  22. deps: V8: cherry-pick 1e35f6472510 

    Original commit message:

    [LTS-M86][builtins] Harden Array.prototype.concat.

    Defence in depth patch to prevent JavaScript from executing
    from within IterateElements.

    R=​ishell@chromium.org
    R=​cbruni@chromium.org

    (cherry picked from commit 8284359ed0607e452a4dda2ce89811fb019b4aaa)

    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Bug: chromium:1195977
    Change-Id: Ie59d468b73b94818cea986a3ded0804f6dddd10b
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2819941
    Reviewed-by: Camillo Bruni <cbruni@chromium.org>
    Reviewed-by: Igor Sheludko <ishell@chromium.org>
    Commit-Queue: Igor Sheludko <ishell@chromium.org>
    Cr-Original-Commit-Position: refs/heads/master@{#73898}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2821961
    Commit-Queue: Jana Grill <janagrill@chromium.org>
    Reviewed-by: Victor-Gabriel Savu <vsavu@google.com>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#76}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@1e35f64
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  23. deps: V8: cherry-pick 8ebd894186ed 

    Original commit message:

    [LTS-M86][builtins] Fix Array.prototype.concat with @@species

    (cherry picked from commit 7989e04979c3195e60a6814e8263063eb91f7b47)

    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Bug: chromium:1195977
    Change-Id: I16843bce2e9f776abca0f2b943b898ab5e597e42
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2810787
    Reviewed-by: Camillo Bruni <cbruni@chromium.org>
    Commit-Queue: Igor Sheludko <ishell@chromium.org>
    Cr-Original-Commit-Position: refs/heads/master@{#73842}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2823829
    Commit-Queue: Jana Grill <janagrill@chromium.org>
    Reviewed-by: Igor Sheludko <ishell@chromium.org>
    Reviewed-by: Victor-Gabriel Savu <vsavu@google.com>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#77}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@8ebd894
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  24. deps: V8: cherry-pick 1a7d55a9a427 

    Original commit message:

    Merged: [runtime] Fix sorted order of DescriptorArray entries

    Revision: 518d67ad652fc24b7eb03e48bb342f952d4ccf74

    This is a reland of the previous merge which addresses the cctest link
    failure in component build mode.

    BUG=chromium:1133527
    NOTRY=true
    NOPRESUBMIT=true
    NOTREECHECKS=true
    R=verwaest@chromium.org

    Change-Id: Icbbc69fd5403fd0c2ab6d07d4340292b2b8c72b9
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2504264
    Reviewed-by: Toon Verwaest <verwaest@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#40}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@1a7d55a
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  25. deps: V8: cherry-pick 93b2105fbe44 

    Original commit message:

    [wasm][ia32][liftoff] Implement AtomicCompareExchange

    As there are not enough registers on ia32 to execute the platform-
    independent code, the CL also adds ia32-specific code to
    liftoff-compiler.cc. For this we first retrieve the memory index from
    the stack, do a bounds check, and calculate the final address. Only
    afterwards we pop all other values from the stack and pass them to the
    platform-dependent code.

    R=clemensb@chromium.org

    Bug: v8:10108
    Change-Id: I741266a9523c8b5c46acc0b29817fd143a75752e
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2316305
    Reviewed-by: Clemens Backes <clemensb@chromium.org>
    Commit-Queue: Andreas Haas <ahaas@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#69047}

Refs: v8/v8@93b2105
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  26. deps: V8: cherry-pick f44fcbf803ac 

    Original commit message:

    Merged: [wasm][liftoff][ia32] Fix register allocation of CompareExchange

    The register that holds the {new_value} for the AtomicCompareExchange8U
    has to be a byte register on ia32. There was code to guarantee that, but
    after that code there was code that frees the {eax} register, and that
    code moved the {new_value} to a different register again. With this CL
    we first free {eax}, and then find a byte register for the {new_value}.

    R=​clemensb@chromium.org
    NOTRY=true
    NOPRESUBMIT=true
    NOTREECHECKS=true

    (cherry picked from commit 70a389ac8778064e470a95412d40e17f97898142)

    Bug: chromium:1140549
    Change-Id: I1679f3f9ab26c5416ea251c7925366ff43336d85
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2491031
    Reviewed-by: Clemens Backes <clemensb@chromium.org>
    Commit-Queue: Andreas Haas <ahaas@chromium.org>
    Cr-Original-Commit-Position: refs/heads/master@{#70721}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2504512
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#38}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@f44fcbf
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  27. deps: V8: cherry-pick 6771d3e31883 

    Original commit message:

    [wasm][liftoff][cleanup] Remove default parameter of GetUnusedRegister

    This CL removes the default parameter of GetUnusedRegister to avoid bugs
    where the default parameter is used accidentially. With "{}" the default
    value of the parameter is easy to write, and also not much more difficult to read.

    R=clemensb@chromium.org

    Bug: v8:10506
    Change-Id: I3debe5eb91578c82abdac81dc6c252435fdf30d6
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2202991
    Reviewed-by: Clemens Backes <clemensb@chromium.org>
    Commit-Queue: Andreas Haas <ahaas@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#67822}

Refs: v8/v8@6771d3e
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  28. deps: V8: cherry-pick eddb82330975 

    Original commit message:

    Merged: [wasm][liftoff] Fix register usage for i64_addi

    The arm implementation made the assumption that the {lhs} and {dst}
    registers are either the same, or there is no overlap. This assumption
    does not hold.
    ia32 on the other hand has a lot of complicated logic (and unnecessary
    code generation) for different cases of overlap.

    This CL fixes the arm issue *and* simplifies the ia32 logic by making
    the arm assumption hold, and using it to eliminate special handling on
    ia32.

    R=​thibaudm@chromium.org

    (cherry picked from commit 89ca48c907e25ef94a135255092c4e150654c4fc)

    Bug: chromium:1146861
    Change-Id: I96c4985fb8ff710b98e009e457444fc8804bce58
    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2584242
    Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
    Commit-Queue: Clemens Backes <clemensb@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#50}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@eddb823
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  29. deps: V8: cherry-pick 4e24c353d812 

    Original commit message:

    [compiler] Test linear searches in a DescriptorArray in the background

    This CL adds a linear search test in a DescriptorArray in a known flat
    object in the background thread, while the main thread exercises the
    same DescriptorArray.

    Also sets the foundation for the follow-ups tests in background threads.

    Bug: v8:7790
    Change-Id: I0e99508204808baaf605161d2eeb717eabe712fb
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2207147
    Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
    Reviewed-by: Georg Neis <neis@chromium.org>
    Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
    Reviewed-by: Michael Stanton <mvstanton@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#68299}

Refs: v8/v8@4e24c35
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  30. deps: V8: cherry-pick be91c6c50818 

    Original commit message:

    [compiler][cleanup] Move Make(String|Name) helper methods to cctest.h

    Several tests were using them and we can dedup code.

    Change-Id: I4ef5ae5772856d1f36e965b6b62ff5895b4e04fb
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2215173
    Reviewed-by: Maya Lekova <mslekova@chromium.org>
    Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#67974}

Refs: v8/v8@be91c6c
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  31. build: do not pass mode option to test-v8 command 

    It was removed upstream and is now inferred from the build config.

PR-URL: nodejs#35705
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Beth Griggs <bgriggs@redhat.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
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  32. deps: V8: cherry-pick bbc59d124ef3 

    Original commit message:

    M86-LTS: [compiler] Fix bug in RepresentationChanger::GetWord32RepresentationFor

    We have to respect the TypeCheckKind.

    (cherry picked from commit fd29e246f65a7cee130e72cd10f618f3b82af232)

    No-Try: true
    No-Presubmit: true
    No-Tree-Checks: true
    Bug: chromium:1195777
    Change-Id: If1eed719fef79b7c61d99c29ba869ddd7985c413
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2817791
    Commit-Queue: Georg Neis <neis@chromium.org>
    Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
    Cr-Original-Commit-Position: refs/heads/master@{#73909}
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2838235
    Owners-Override: Achuith Bhandarkar <achuith@chromium.org>
    Reviewed-by: Artem Sumaneev <asumaneev@google.com>
    Commit-Queue: Achuith Bhandarkar <achuith@chromium.org>
    Cr-Commit-Position: refs/branch-heads/8.6@{nodejs#79}
    Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
    Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}

Refs: v8/v8@bbc59d1
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