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Why xor eax, eax?
Why do compilers love xor-ing registers so much?
Matt Godbolt
Sometime around 2010, while I was working at Google, I came up with a fun mini project to marry my love of retro computing with my excitement for working at big G.
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Visit xania.org → RSS feedOn Hacker News May 2012 – Dec 2025
Software Engineering 10Tools & Productivity 5Systems & Performance 5
2
Advent of Compiler Optimisations 2025
Announcing AoCO 2025 - daily December posts about compiler optimisations
3
Compiler Explorer and the promise of URLs that last forever
How we're preserving 12,000 legacy links as Google's URL shortener rides into the sunset
4
Addressing the adding situation
We learn why adding on x86 isn't as obvious as you might think
5
You can't fool the optimizer
Pattern recognition can see through obfuscated code to find the right instruction
6
When compilers surprise you
Sometimes compilers can surprise and delight even a jaded old engineer like me
7
How Compiler Explorer Works in 2025
How we handle 92 million compilations a year without everything catching fire
8
Happy 10th Birthday Compiler Explorer
Wishing Compiler Explorer a very happy tenth birthday
9
GCC Explorer
Introducing a new way to stare at the disassembly of your compiled C and C++
10
How it works: Compiler Explorer
I explain how Compiler Explorer runs on Amazon's cloud computing infrastructure