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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. Rich Felker‏ @RichFelker 11 Oct 2017

      Rich Felker Retweeted Chandler Carruth

      Thread: How to trash your code quality with awful hacks to make up for LLVM being so much worse than GCC.https://twitter.com/chandlerc1024/status/918034746587803648 …

      Rich Felker added,

      Chandler Carruth @chandlerc1024
      Switching GCC -> LLVM and seeing perf problems? @modocache asked for 10. Let's build a thread and see: 1) -fexperimental-new-pass-manager
      Show this thread
      2 replies 10 retweets 10 likes
      Show this thread
    2. Steve Canon‏ @stephentyrone 11 Oct 2017
      Replying to @RichFelker

      I would consider a number (not all) of @chandlerc1024's suggestions improvements to code quality. Move rarely-used paths out-of-line? Great!

      4 replies 0 retweets 6 likes
    3. Rich Felker‏ @RichFelker 11 Oct 2017
      Replying to @stephentyrone @chandlerc1024

      Unless already tightly coupled, putting code in headers is usually a big offense. Factoring based on perf rather than logic even moreso.

      2 replies 0 retweets 1 like
    4. Steve Canon‏ @stephentyrone 11 Oct 2017
      Replying to @RichFelker @chandlerc1024

      When perf is important, factoring based on perf is appropriate. It'll also help both GCC and your own optimization efforts.

      1 reply 0 retweets 0 likes
    5. Rich Felker‏ @RichFelker 11 Oct 2017
      Replying to @stephentyrone @chandlerc1024

      As a last resort, yes. Compiler tech should be eliminating that, though (LTO, etc.) not bringing it back.

      1 reply 0 retweets 0 likes
    6. Rich Felker‏ @RichFelker 11 Oct 2017
      Replying to @RichFelker @stephentyrone @chandlerc1024

      I freely admit to doing the same fairly often, but it's not something I'm proud of or consider clean. It's "cos the compiler sucks".

      1 reply 0 retweets 0 likes
    7. Steve Canon‏ @stephentyrone 11 Oct 2017
      Replying to @RichFelker @chandlerc1024

      It is the cleanest solution I know. There is a vast supply of compilers worse than LLVM that will need it, even if LLVM doesn't.

      1 reply 0 retweets 0 likes
    8. Steve Canon‏ @stephentyrone 11 Oct 2017
      Replying to @stephentyrone @RichFelker @chandlerc1024

      Unless one is fortunate to live in Cloudcuckooland where only ToT GCC or LLVM exists, that's the way it's gonna be.

      1 reply 0 retweets 0 likes
      Rich Felker‏ @RichFelker 11 Oct 2017
      Replying to @stephentyrone @chandlerc1024

      GCC is really still the only compiler with near-universal target support and production-grade optimization.

      12:56 PM - 11 Oct 2017
      2 replies 0 retweets 0 likes
        1. Rich Felker‏ @RichFelker 11 Oct 2017
          Replying to @RichFelker @stephentyrone @chandlerc1024

          That's not to say GCC is at all well-designed or clean, just that others have a long way to go achieving better with good design.

          0 replies 0 retweets 0 likes
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        1. Steve Canon‏ @stephentyrone 11 Oct 2017
          Replying to @RichFelker @chandlerc1024

          Unfortunately, that has nothing to do with whether or not people are going to compile your code using other compilers.

          0 replies 0 retweets 0 likes
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