Changing std::sort at Google’s Scale and Beyond
TL;DR; We are changing std::sort in LLVM’s libcxx. That’s a long story of what it took us to get there and all possible consequences, bugs you might encounter with examples from open source. We provide some benchmarks, perspective, why we did this in the first place and what it cost us with exciting ideas from Hyrum’s Law to reinforcement learning. All changes went into open source and thus I can
We Are WebAssembly Experts | Leaning Technologies
At Leaning Technologies, we help harness the power of modern browsers so you can develop complex, high-performance web applications, or preserve critical legacy systems, in any programming language. Our state-of-the-art WebAssembly solutions are here to help.
eBPF assembly with LLVM
From C to Object File Down to the Instructions eBPF Step by Step with LLVM Compiling from C to eBPF Assembly Assembling to an ELF Object File A Human-Friendly Output with llvm-objdump Inline Assembly Conclusion This post was left aside as a draft for a long time. Most of it was written in December 2017. I publish it with the hope it can still be helpful today, even though the Cilium guide also cov
A Complete Guide to LLVM for Programming Language Creators
Update: this post has now taken off on Hacker News and Reddit. Thank you all! Who’s this tutorial for?This series of compiler tutorials is for people who don’t just want to create a toy language. You want objects. You want polymorphism. You want concurrency. You want garbage collection. Wait you don’t want GC? Okay, no worries, we won’t do that :P If you’ve just joined the series at this stage, he
RustのLLVMに関する問題 - 日記
概要 dereferenceable_globally NonZeroUXXのLower 空無限ループ 終わりに 概要 この記事はRust Advent Calendar 2019の12日目の記事として書かれました。 qiita.com 遅刻してしまった...すいません(最悪)。 言わずもがなRustはLLVMをバックエンドに持つ言語です。 なのでバグがLLVMの最適化のせいだったりします。有名な例はnoaliasとか無限ループとかです。この辺りは定期的(2ヶ月一回くらい?)にTwitterとかで話題になりますね。またRustでの強い制約がLLVMにおける意味とのギャップで弱く表現せざるを得なかったりもします。そんな感じのこと少しだけ掘り下げて、RustのIssueとかLLVMのPhabricatorから幾つかまとめてみます。怪しいこと言ってたら教えて下さい。 dereferenceabl
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