It's interesting to note that LLVM's aggressive API churn is fantastic for forcing companies to push code upstream: http://t.co/UTiq0ujTv6
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Over a sufficiently long time horizon, all code you write is legacy code.
I'm intrigued to see that Google has quantified that new code is generally buggier and less secure than code that has existed in your codebase for longer: https://security.googleblog.com/2024/09/eliminating-memory-safety-vulnerabilities-Android.html
Bril is a cute intermediate language for teaching (think simplified LLVM IR): https://www.cs.cornell.edu/~asampson/blog/bril.html
The idea of providing a standard JSON format to help students write basic passes is really elegant.