• bjaideep's avatar
    PPC/s390: [turbofan] Remove special JSForInStep and JSForInDone. · b4ccb16a
    bjaideep authored
    Port 1915762c
    
    Original commit message:
    
        These JavaScript operators were special hacks to ensure that we always
        operate on Smis for the magic for-in index variable, but this never
        really worked in the OSR case, because the OsrValue for the index
        variable didn't have the proper information (that we have for the
        JSForInPrepare in the non-OSR case).
    
        Now that we have loop induction variable analysis and binary operation
        hints, we can just use JSLessThan and JSAdd instead with appropriate
        Smi hints, which handle the OSR case by inserting Smi checks (that are
        always true). Thanks to OSR deconstruction and loop peeling these Smi
        checks will be hoisted so they don't hurt the OSR case too much.
    
        Drive-by-change: Rename the ForInDone bytecode to ForInContinue, since
        we have to lower it to JSLessThan to get the loop induction variable
        goodness.
    
    R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
    BUG=
    LOG=N
    
    Review-Url: https://codereview.chromium.org/2502503002
    Cr-Commit-Position: refs/heads/master@{#40947}
    b4ccb16a
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