• Benedikt Meurer's avatar
    [turbofan] Introduce a new MapGuard operator. · af4f1520
    Benedikt Meurer authored
    The MapGuard node sits in the effect chain as a hint for other
    optimization passes that a certain value has a certain (set of)
    map(s) guarded by checks on the control chain. This is useful
    to learn from explicit control flow inserted for polymorphic
    property accesses, and then used as part of the polymorphic
    inlining.
    
    This change improves the score on the Octane/DeltaBlue benchmark
    by around 7-8% and the score on the Octane/Richards benchmark by
    like 3% on average.
    
    Bug: v8:5267
    Change-Id: Id0b0b2c72e6a9342d5750a0d62cf6be6fb8c5916
    Also-By: jarin@chromium.org
    Reviewed-on: https://chromium-review.googlesource.com/620586
    Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
    Reviewed-by: 's avatarJaroslav Sevcik <jarin@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#47417}
    af4f1520
verifier.cc 63.9 KB