Llvm-project Alternatives

llvm-project reviews and mentions

• Zig 0.15.1 Release Notes
  2 projects | news.ycombinator.com | 22 Aug 2025

  This reminds me of a similar issue in LLVM's `raw_svector_ostream`. Before a 2015 commit https://github.com/llvm/llvm-project/commit/3d1173ba1a53cab0... ,

• D4d4
  1 project | news.ycombinator.com | 21 Aug 2025

  Huh? Quoting a bit more from the article:

  > [W]e find this in ARM.cpp:

  > trapInstr = {0xd4, 0xd4, 0xd4, 0xd4};

  The only thing left to explain is that the trap instruction is used as padding, but you can’t tell from here if that’s obvious or not. Opening the actual code[1], we see that the occurrences of trapInstr are all along the lines of

  > void ARM::writePlt( /* ... / ) {

  > / ... */

  > memcpy(buf + 12, trapInstr.data(), 4); // Pad to 16-byte boundary

  which isn’t the absolute best, but seems clear enough (if of course you know what a PLT is, which you should if you’re writing a linker).

  I do think this merits an explanation that we’re using (what’s intended to be) a trap because the traditional option of using a nop makes ASLR less effective. But then the commit message you’re quoting doesn’t mention that either.

  [1] https://github.com/llvm/llvm-project/blob/b20c291baec94ba370...

• Undefined Behavior in C and C++
  2 projects | news.ycombinator.com | 12 Aug 2025

  Certainly compiler developers are only human, and many of them write C++ so they're humans working with a terrible programming language, I wouldn't sign up for that either (I have written small contributions to compilers, but not in C++). I still don't see "any excuses". I see more usual human laziness and incompetence, LLVM for example IMNSHO doesn't work hard enough to ensure their IR has coherent semantics and to deliver on those semantics.

  The compiler bug I'm most closely following, and which I suspect you have your eye on too is: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119472 aka https://github.com/rust-lang/rust/issues/107975 https://github.com/llvm/llvm-project/issues/45725

  But it seems like it's just that everybody fucked this up in similar ways, that's two different major compiler backends! I wouldn't be surprised if Microsoft (whose code we can't see) find that they don't get this quite right either.

• My Ideal Array Language
  1 project | news.ycombinator.com | 4 Aug 2025

  My ideal array language is one in which array operations are function compositions, since arrays are functions. A functional view of array expressions naturally minimizes needless temporaries in most cases.

  See https://github.com/llvm/llvm-project/blob/main/flang/docs/Ar....

• Ask HN: What should I do with the domain github.mx
  1 project | news.ycombinator.com | 31 Jul 2025

  Lightweight UI for Github? (Idk if that exists).

  e.g. client requests https://github.mx/llvm/llvm-project, your server fetches the data from https://github.com/llvm/llvm-project (using an API or scraping the site), and renders it in a cleaner UI with less HTML and JavaScript.

  It would be useful for slow/outdated devices and places with low internet bandwidth. The URL concept is similar to https://github.dev/llvm/llvm-project which opens the project in a web-hosted VSCode (so vaguely the opposite approach).

• Clang: -Wexperimental-lifetime-safety: Experimental C++ Lifetime Safety Analysis
  2 projects | news.ycombinator.com | 14 Jul 2025

  - Testing: llvm-lit tests validate the analysis by checking the generated facts.

  Example:

  [LifetimeSafety] Introduce intra-procedural analysis in Clang

  - commit: https://github.com/llvm/llvm-project/commit/3076794e924f

• Strategies for Fast Lexers
  5 projects | news.ycombinator.com | 14 Jul 2025

  https://github.com/llvm/llvm-project/issues/56435

• jank Is C++
  10 projects | news.ycombinator.com | 11 Jul 2025

  > still is the main company behind LLVM.

  lol people really say whatever comes to their mind around here don't they? I'm pretty sure all of the companies associated with these targets would strongly disagree with you

  https://github.com/llvm/llvm-project/tree/main/llvm/lib/Targ...

• So you want to serialize some DER?
  1 project | news.ycombinator.com | 30 Jun 2025

  The most interesting part of this post is the bit about half way down, where Alex uses Claude to help identify a missing compiler optimization in LLVM... and then uses Claude Code to implement that optimization and gets a PR accepted to LLVM itself! https://github.com/llvm/llvm-project/pull/142869

• NativeJIT: A C++ expression –> x64 JIT
  6 projects | news.ycombinator.com | 29 Jun 2025

  it's mostly upstream now, no need to dig around in their repos

  https://github.com/llvm/llvm-project/tree/main/clang/tools/c...

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