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Comment by vsuperpower2020 | Hacker News Reader

vsuperpower2020·

All serious compilers go through LLVM or have their own optimization passes. The person writing the compilers needs to know how the architecture works to make it possible for the pipeline to do its job. It's no different than the programmer being aware of cache lines, even if they don't explicitly manage them.

You should understand that people don't always speak in what you'd consider to be 100% literal language.

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I think a ton of serious compilers don't go through LLVM. As always HN makes a ton of assumptions based on a small fraction of the engineering and tech world.

The compiler needs to know how to generate efficient ASM code. That may or may not involve optimizations targeting the pipeline. OP made it seem like the compiler is handling pipelining itself, vs. eg. reordering instructions.

> The person writing the compilers needs to know how the architecture works to make it possible for the pipeline to do its job.

Not really, but you will probably want to think about these things a little to optimize. The pipeline also works if you naively use it.

>I think a ton of serious compilers don't go through LLVM. As always HN makes a ton of assumptions based on a small fraction of the engineering and tech world.

I said LLVM or their own optimization passes. Reread what I said so you can understand the words on the screen instead of bemoaning the state of the world.

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