Radar ·
Chris Lattner on undefined behavior in C, part 1 of 3
Radar note on the first part of a three-part series by Chris Lattner, originally published in 2011 on the LLVM blog, explaining undefined behavior in C and how compiler optimizations exploit it.
Radar note, recorded on 31/10/2026, pointing to the first part of a three-part series by Chris Lattner. The post, originally from 2011 on the LLVM blog, explains undefined behavior in C. It was motivated by SIGTRAP signals in code compiled by Clang with optimization, and describes how compiler optimizations exploit this behavior. The text covers how this affects writing correct and safe C and C++.
The stated scope is introductory, and the later parts of the series are not part of this note. To consult the original, find the post on the LLVM blog by its title and confirm the author and publication date on the page itself. If you use AI to study the material, paste only code snippets without personal data, identifiers or credentials, because the platform detects this kind of data before any model runs.
Original source: Chris Lattner sobre undefined behavior em C, parte 1 de 3