• bmeurer's avatar
    [turbofan] Introduce initial support for TypedArrays. · 66f2d3bd
    bmeurer authored
    This adds support for lowering keyed access to JSTypedArray objects to
    element loads and stores instead of IC calls. There's still a lot of
    room for improvement, but the improvements can be done incrementally
    later.
    
    We add a dedicated UnsafePointerAdd operator, which sits in the effect
    chain, and does the (GC invisible) computation of addresses that are
    potentially inside HeapObjects. Also there's now a dedicated Retain
    operator, which ensures that we retain a certain tagged value, which is
    necessary to ensure that we keep a JSArrayBuffer alive as long as we
    might still potentially access elements in its backing store.
    
    R=epertoso@chromium.org
    
    Review-Url: https://codereview.chromium.org/2203693002
    Cr-Commit-Position: refs/heads/master@{#38235}
    66f2d3bd
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