LLVM-AS(1)

💅 LLVM-AS(1) — the LLVM assembler, but make it make sense

okay so first things first, the manual name is LLVM and this whole page is your girl's guide to llvm-as 🎀

✨ NAME ✨

llvm-as — the LLVM assembler. that's it, that's the vibe 💖

✨ SYNOPSIS ✨

llvm-as [options] [filename]

✨ DESCRIPTION ✨

okay so llvm-as is the LLVM assembler 🫶 it reads a file full of human-readable LLVM assembly language, translates it into LLVM bitcode, and writes the result into a file or to standard output. it's giving translator era, it's giving glow-up, no cap ✨

if filename is omitted or is -, then llvm-as reads its input from standard input. literally just vibes from stdin, slay 💅

if an output file is not specified with the -o option, then llvm-as sends its output to a file or standard output by following these rules — and bestie, these rules are iconic, memorize them:

• If the input is standard input, then the output is standard output. 💫
• If the input is a file that ends with .ll, then the output file is of the same name, except that the suffix is changed to .bc.
• If the input is a file that does not end with the .ll suffix, then the output file has the same name as the input file, except that the .bc suffix is appended.

like, the naming logic is lowkey doing the most, but it's consistent and we respect it 🧚

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🌸 OPTIONS 🌸

• -f — Enable binary output on terminals. Normally, llvm-as will refuse to write raw bitcode output if the output stream is a terminal. With this option, llvm-as will write raw bitcode regardless of the output device. so it's the "i know what i'm doing, let me live" flag 😭 use it with intention bestie.
• -help — Print a summary of command line options. when in doubt, ask for help, that's main character energy 👑
• -o filename — Specify the output file name. If filename is -, then llvm-as sends its output to standard output. yes, - means stdout, it's a whole thing 💀

💀 EXIT STATUS 💀

If llvm-as succeeds, it will exit with 0. Otherwise, if an error occurs, it will exit with a non-zero value. so 0 = we ate, non-zero = something's not slaying 🔥

🦋 SEE ALSO 🦋

• llvm-dis(1) <llvm-dis.html>
• as(1)

like the reverse of this whole situation and also the classic, iykyk 💜

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👑 Author 👑

Maintained by the LLVM Team (https://llvm.org/). they're the parents of this entire ecosystem, fr fr 🫶

🌈 Copyright 🌈

2003-2026, LLVM Project

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and that's the tea, bestie 🍓 this was LLVM-AS(1) from the LLVM manual, version 23, dated 2026-10-20 — screenshot it, cite it, live by it, periodt 💅✨🎀