• Ng Zhi An's avatar
    Revert "[wasm-simd] Canonicalize shuffles when creating TurboFan graph" · ede5e814
    Ng Zhi An authored
    This reverts commit d16eefe0.
    
    It is not correct to check for node equality during the graph
    construction phase, because we can have optimizations that will combine
    same nodes. So it can happen that in wasm-compiler, the inputs to
    shuffle are not the same, so we canonicalize using that knowledge that
    it will not be the same, and allow indices > 15. But later we can have
    optimizations that combine the 2 inputs (e.g. splat of the same
    constants), and the instruction selector will see that the input nodes
    are the same.
    
    Bug: v8:11542,chromium:1199662
    Change-Id: I21c175f4707708038710147f64d687d1b14c6ecc
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2829986
    Commit-Queue: Zhi An Ng <zhin@chromium.org>
    Reviewed-by: 's avatarBill Budge <bbudge@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#74017}
    ede5e814
instruction-selector-mips.cc 94.8 KB