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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. whitequark‏ @whitequark 30 Apr 2016
      Replying to @RichFelker

      @RichFelker I take issue to the statement that we don't need alternatives to C

      1 reply 0 retweets 0 likes
    2. Rich Felker‏ @RichFelker 30 Apr 2016
      Replying to @whitequark

      @whitequark Replace "C" by your favorite HLL. Same principle applies.

      1 reply 0 retweets 0 likes
    3. whitequark‏ @whitequark 30 Apr 2016
      Replying to @RichFelker

      @RichFelker I agree then; but also the discussion is centered around a hypothetical HLL that we call "portable assembly"

      2 replies 0 retweets 1 like
    4. Rich Felker‏ @RichFelker 30 Apr 2016
      Replying to @whitequark

      @whitequark To me, part of the definition of "portable assembly" is that it _not_ be a HLL.

      1 reply 0 retweets 0 likes
    5. whitequark‏ @whitequark 30 Apr 2016
      Replying to @RichFelker

      @RichFelker portability requires abstraction, which is inevitably a high-level feature. the question is to what level

      1 reply 0 retweets 0 likes
    6. Rich Felker‏ @RichFelker 30 Apr 2016
      Replying to @whitequark

      @whitequark I consider a language HL if it lacks direct correspondence between source statements & output machine insns ("as if rule").

      2 replies 0 retweets 0 likes
    7. whitequark‏ @whitequark 30 Apr 2016
      Replying to @RichFelker

      @RichFelker I think this definition isn't rigorous enough to be useful. Scheme defined to be template-compiled is not HLL;

      1 reply 0 retweets 0 likes
    8. whitequark‏ @whitequark 30 Apr 2016
      Replying to @whitequark

      @RichFelker regular assembly with extensive use of pseudoinstructions is HLL?

      1 reply 0 retweets 0 likes
    9. whitequark‏ @whitequark 30 Apr 2016
      Replying to @whitequark

      @RichFelker e.g. there isn't anything about the *language* of ARM assembly that precludes an assembler from changing code under as-if

      1 reply 0 retweets 0 likes
    10. whitequark‏ @whitequark 30 Apr 2016
      Replying to @whitequark

      @RichFelker in other words, direct correspondence is a property of an implementation, not a language, unlike high-level-ness ~ abstraction

      1 reply 0 retweets 0 likes
      Rich Felker‏ @RichFelker 30 Apr 2016
      Replying to @whitequark

      @whitequark This is false. All such transformations break valid code in one way or another.

      2:32 PM - 30 Apr 2016
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Rich Felker‏ @RichFelker 30 Apr 2016
          Replying to @RichFelker

          @whitequark For example, using temp regs or introducing spills breaks clobber contracts or ability to run with no stack.

          1 reply 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker 30 Apr 2016
          Replying to @RichFelker

          @whitequark Reordering insns breaks otherwise well-defined async code (interrupt/signal handler) like pre-armv6 kuser atomics.

          1 reply 0 retweets 0 likes
        4. whitequark‏ @whitequark 30 Apr 2016
          Replying to @RichFelker

          @RichFelker I contend that the range of transformations is quite limited, probably limited enough to not be useful in practice ever

          0 replies 0 retweets 0 likes
        5. End of conversation

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