• bmeurer's avatar
    [builtins] Make Math.max and Math.min fast by default. · cb9b8010
    bmeurer authored
    The previous versions of Math.max and Math.min made it difficult to
    optimize those (that's why we already have custom code in Crankshaft),
    and due to lack of ideas what to do about the variable number of
    arguments, we will probably need to stick in special code in TurboFan
    as well; so inlining those builtins is off the table, hence there's no
    real advantage in having them around as "not quite JS" with extra work
    necessary in the optimizing compilers to still make those builtins
    somewhat fast in cases where we cannot inline them (also there's a
    tricky deopt loop in Crankshaft related to Math.min and Math.max, but
    that will be dealt with later).
    
    So to sum up: Instead of trying to make Math.max and Math.min semi-fast
    in the optimizing compilers with weird work-arounds support %_Arguments
    %_ArgumentsLength, we do provide the optimal code as native builtins
    instead and call it a day (which gives a nice performance boost on some
    benchmarks).
    
    R=jarin@chromium.org
    
    Review URL: https://codereview.chromium.org/1641083003
    
    Cr-Commit-Position: refs/heads/master@{#33582}
    cb9b8010
macro-assembler-x64.h 70.6 KB