• yangguo's avatar
    [regexp] simplify unanchored advance for unicode regexps. · 33c78c39
    yangguo authored
    When doing advance at the start of an unanchored unicode regexp,
    we do not have to care about surrogate pairs. If we actually advance
    into the middle of a surrogate pair, the only choice is to also
    consume trail surrogate as nothing else can match from there.
    
    This reduces the emitted code slightly. By not having choice in the
    loop, we do not have to push backtrack onto the stack, preventing
    stack overflow.
    
    R=erik.corry@gmail.com, erikcorry@chromium.org
    
    Review URL: https://codereview.chromium.org/1676293003
    
    Cr-Commit-Position: refs/heads/master@{#33838}
    33c78c39
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