• mstarzinger's avatar
    [interpreter] Add explicit OSR polling bytecode. · a55beb68
    mstarzinger authored
    This adds an explicit {OsrPoll} bytecode into every loop header which
    triggers on-stack replacement when armed. Note that each such bytecode
    stores the static loop depths as an operand, and hence can be armed for
    specific loop depths.
    
    This also adds builtin code that triggers OSR compilation and switches
    execution over to optimized code in case compilation succeeds. In case
    compilation fails, the bytecode dispatch just continues unhindered.
    
    R=rmcilroy@chromium.org
    TEST=mjsunit/ignition/osr-from-bytecode
    BUG=v8:4764
    
    Review-Url: https://codereview.chromium.org/2172233002
    Cr-Commit-Position: refs/heads/master@{#38043}
    a55beb68
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