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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. Brendan Dolan-Gavitt‏ @moyix Mar 12

      I seem to remember that the Visual Studio compiler could in some cases merge identical code from different functions together to save space (e.g., by combining identical epilogues). Anyone happen to have an example or link?

      2 replies 1 retweet 2 likes
      Rich Felker‏ @RichFelker Mar 12
      Replying to @moyix

      According to a recent question I saw on SO (but can't find atm) it merges whole functions and violates the language guarantees about non-equality of function pointers...

      3:46 PM - 12 Mar 2018
      • 2 Likes
      • Tamas K Lengyel Brendan Dolan-Gavitt
      4 replies 0 retweets 2 likes
        1. New conversation
        2. Brendan Dolan-Gavitt‏ @moyix Mar 12
          Replying to @RichFelker

          Yikes!

          1 reply 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker Mar 12
          Replying to @moyix

          Everything about MSVC is just a steaming pile of 💩

          0 replies 0 retweets 1 like
        4. End of conversation
        1. New conversation
        2. Igor Skochinsky‏ @IgorSkochinsky Mar 12
          Replying to @RichFelker @moyix

          This is called identical code folding (ICF) optimization. lld supports it too.

          2 replies 1 retweet 2 likes
        3. Brendan Dolan-Gavitt‏ @moyix Mar 13
          Replying to @IgorSkochinsky @RichFelker

          According to Raymond Chen, it's Identical COMDAT Folding:https://blogs.msdn.microsoft.com/oldnewthing/20161024-00/?p=94575 …

          1 reply 0 retweets 0 likes
        4. Igor Skochinsky‏ @IgorSkochinsky Mar 13
          Replying to @moyix @RichFelker

          yes, both terms are used.

          0 replies 0 retweets 1 like
        5. End of conversation
        1. Pumpkin Fright 👨‍⚕️ 🍕‏Verified account @DrPizza Mar 13
          Replying to @RichFelker @moyix

          The LLVM and GNU linkers can both do the same thing, it's not just MSVC...

          0 replies 0 retweets 1 like
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        1. Seamus‏ @AlternateAdmin Mar 12
          Replying to @RichFelker @moyix

          Wait wut?? Who signed off on that

          0 replies 0 retweets 1 like
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