• Leszek Swirski's avatar
    [maglev] Add fast-path trampolines for dynamic lookup · 8c12c24d
    Leszek Swirski authored
    Dynamic maybe-context/maybe-global lookup can fast-path in the case
    where there are no context extensions in the parent contexts. Add a
    trampoline builtin for maglev which performs this fast path.
    
    This is similar to Sparkplug, which calls a similar builtin (except one
    which loads context and FBV from Sparkplug frame slots), and unlike
    TurboFan, which creates local control flow to inline this operation
    fully. Maglev avoids creating local control flow, so the builtin
    approach seems more fitting.
    
    Bug: v8:7700
    Change-Id: I2f63694d9c1f907f91b8b7b8982adc9f9ba106ca
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3871210Reviewed-by: 's avatarIgor Sheludko <ishell@chromium.org>
    Auto-Submit: Leszek Swirski <leszeks@chromium.org>
    Commit-Queue: Leszek Swirski <leszeks@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#82985}
    8c12c24d
builtins-ic-gen.cc 9.76 KB