• Dan Elphick's avatar
    [compiler] Optimize AddInputsToFrameStateDescriptor · 500d73b9
    Dan Elphick authored
    Optimizes InstructionSelector::AddInputsToFrameStateDescriptor by
    taking advantage of SparseInputMask data structure to more quickly
    handle empty inputs and insert all the OptimizedOut entries in one go.
    The number of empty inputs is now determined using CountTrailingZeros
    rather than iterating over them one at a time.
    
    Gives a 9% improvement to SelectInstructions runtime call stat for
    Octane in turboprop.
    
    Bug: v8:10051
    Change-Id: Ib13d6f9644b4c89ba0546a19fe0ed623d69fec99
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2037443
    Commit-Queue: Dan Elphick <delphick@chromium.org>
    Reviewed-by: 's avatarGeorg Neis <neis@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#66591}
    500d73b9
state-values-utils.h 4.02 KB