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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. John Regehr‏ @johnregehr 13 Oct 2017

      argh Souper can't optimize this function to "return i + 1" and it's killing mepic.twitter.com/jLcfwyadMo

      5 replies 5 retweets 40 likes
      Show this thread
    2. Rich Felker‏ @RichFelker 16 Oct 2017
      Replying to @johnregehr

      It's bothering me more that the function is called add rather than inc.

      1 reply 0 retweets 1 like
    3. John Regehr‏ @johnregehr 16 Oct 2017
      Replying to @RichFelker

      ya... I already renamed it in my local copy

      1 reply 0 retweets 1 like
    4. John Regehr‏ @johnregehr 16 Oct 2017
      Replying to @johnregehr @RichFelker

      Souper isn't allowed to take stupid names into account tho

      1 reply 0 retweets 3 likes
    5. Brendan G Bohannon‏ @cr88192 16 Oct 2017
      Replying to @johnregehr @RichFelker

      is it bad that I feel mildly intimidated that anyone would actually expect a compiler to optimize something like this?...

      1 reply 0 retweets 1 like
    6. John Regehr‏ @johnregehr 16 Oct 2017
      Replying to @cr88192 @RichFelker

      no, it's only a somewhat extreme tool like Souper that might have a chance

      1 reply 0 retweets 0 likes
    7. John Regehr‏ @johnregehr 16 Oct 2017
      Replying to @johnregehr @cr88192 @RichFelker

      a regular optimizer would either get this one using a sequence of small steps or else have a hard-coded pattern for the whole thing

      2 replies 0 retweets 0 likes
      Rich Felker‏ @RichFelker 16 Oct 2017
      Replying to @johnregehr @cr88192

      Expanding out small bounded recursion then simplifying may succeed, but optimizing recursion at all is dubious.

      9:22 PM - 16 Oct 2017
      1 reply 0 retweets 0 likes
        1. John Regehr‏ @johnregehr 16 Oct 2017
          Replying to @RichFelker @cr88192

          It is an entertaining problem, not a realistic one

          0 replies 0 retweets 0 likes
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