• Clemens Hammacher's avatar
    Revert "[ptr-compr] Make on-heap JSTypedArrays smi-corrupting friendly" · 815df7d2
    Clemens Hammacher authored
    This reverts commit 6f9b2bd4.
    
    Reason for revert: Fails on nvidia bots, blocking LKGR: https://ci.chromium.org/p/v8/builders/ci/Win%20V8%20FYI%20Release%20(NVIDIA)/5005
    
    Original change's description:
    > [ptr-compr] Make on-heap JSTypedArrays smi-corrupting friendly
    > 
    > On-heap typed arrays contain HeapObject value in |base_pointer| field
    > and an offset in |external_pointer| field. When pointer compression is
    > enabled we want to combine decompression with the offset addition.
    > In order to do that we add an isolate root to the external_pointer value
    > and therefore the data pointer computation can is a simple addition of
    > a (potentially sign-extended) |base_pointer| loaded as Tagged_t value
    > and an |external_pointer| value.
    > 
    > Bug: v8:9706
    > Change-Id: Id5c546c353c81fb25e3598921bc78165d10a9c44
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1807369
    > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
    > Reviewed-by: Jakob Gruber <jgruber@chromium.org>
    > Reviewed-by: Toon Verwaest <verwaest@chromium.org>
    > Reviewed-by: Georg Neis <neis@chromium.org>
    > Commit-Queue: Igor Sheludko <ishell@chromium.org>
    > Cr-Commit-Position: refs/heads/master@{#63874}
    
    TBR=ulan@chromium.org,neis@chromium.org,jgruber@chromium.org,ishell@chromium.org,verwaest@chromium.org
    
    Change-Id: I901280dd191e78d02969600f775c4f0da796921f
    No-Presubmit: true
    No-Tree-Checks: true
    No-Try: true
    Bug: v8:9706
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1813027Reviewed-by: 's avatarClemens Hammacher <clemensh@chromium.org>
    Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#63886}
    815df7d2
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