• Teodor Dutu's avatar
    Revert "[ptr-compr-8gb] Align Turbofan allocations to 8 bytes" · 2a8f5628
    Teodor Dutu authored
    This reverts commit f97f7d79.
    
    Reason for revert: a simpler approach will be used instead.
    
    Original change's description:
    > [ptr-compr-8gb] Align Turbofan allocations to 8 bytes
    >
    > In order to support a larger heap cage (8GB, 16GB), the cage offset
    > will take up more than 32 bits. As a consequence, for 8GB cages, the
    > least significant bit of the cage offset will overlap with the most
    > significant bit of the tagged offset. To avoid this, allocations need
    > to be aligned to 8 bytes to free up one bit from the offset.
    >
    > All changes are deactivated behind the build flag
    > `v8_enable_pointer_compression_8gb`. Allocation folding is not yet
    > supported.
    >
    > Bug: v8:13070
    > Change-Id: I602c71232e98eac4e2701b0922704a7adc31a662
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3817741
    > Commit-Queue: Teo Dutu <teodutu@google.com>
    > Reviewed-by: Marja Hölttä <marja@chromium.org>
    > Reviewed-by: Igor Sheludko <ishell@chromium.org>
    > Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
    > Cr-Commit-Position: refs/heads/main@{#82331}
    
    Bug: v8:13070
    Change-Id: Id2186898596847142a80aba7604e870093a26d8b
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3879224Reviewed-by: 's avatarIgor Sheludko <ishell@chromium.org>
    Reviewed-by: 's avatarNico Hartmann <nicohartmann@chromium.org>
    Commit-Queue: Teo Dutu <teodutu@google.com>
    Cr-Commit-Position: refs/heads/main@{#83071}
    2a8f5628
memory-lowering.h 5.29 KB