Technical Analysis of LLVM IR Design Issues and Current Fixes
By
vitaut
Baker's choice. Dense with flavour, light on filler.
Summary
The article is a technical critique of LLVM's design issues, building on a previous blog post. The author notes that some previously identified problems have been addressed (opaque pointers migration, constant expression removal, ptradd migration), but now aims to discuss additional design flaws in LLVM IR. The content focuses on technical implementation problems rather than solutions, targeting developers and compiler engineers familiar with LLVM's architecture.
Key quotes
· 4 pulledSince then, one of these issues has been fixed fully (opaque pointers migration), one has been mostly fixed (constant expression removal), and one is well on the way towards being fixed (ptradd migration).
This time I'm going to be more ambitious and not stop at three issues.
Of course, not all of these issues are of equal importance, and how important they are depends on who you ask.
In the interest of brevity, I will mostly just explain what the problem is, and not discuss what possible solutions would be.
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