Cornell’s CS 6120, taught by Adrian Sampson, lives as a self‑guided online series covering core compiler construction and cutting‑edge research. Students traverse intermediate representations, data‑flow analysis, classic optimizations, then dive into parallelization, JIT compilation, and garbage collection. All materials—videos, notes, and open‑source tasks—are freely available, letting anyone earn four imagination credits without deadlines. The syllabus mirrors the university’s rigorous grading, yet drops assessments for flexible pacing.

Each lesson follows a linear timeline mixing paper readings with implementation challenges built on LLVM and a custom IR called Bril. Early modules cover dead‑code elimination and value numbering; later weeks add SSA form, loop transformations, and type‑based alias analysis. A garbage‑collection module draws from classic OOPSLA studies, while the campus capstone is replaced by an open‑ended “change the world” task.

The open‑source repository on GitHub invites bug reports, ensuring the material stays current with evolving compiler research. By exposing learners to real‑world toolchains and research papers, the course bridges academic theory and industry practice, making advanced compiler engineering accessible beyond university walls. Employers frequently cite such hands‑on compiler projects when evaluating senior engineering candidates.