A study plan and private tracker
LLVM and Clang in 30 Study Days
From C++ developer with no compiler background to contribution readiness: a small, useful Clang contribution that you understand and can test.
Ideally that is a narrow fix with a regression test. A documentation improvement or a well-investigated bug report is a valid fallback. Maintainer acceptance and merge timing sit outside a 30-day schedule.
Time commitment
30 study sessions of about 150 minutes, roughly 75 focused hours. A normal session is 40 minutes reading, 80 minutes implementation or investigation, 20 minutes testing and 10 minutes notes. Some reading-heavy days use up to 45 minutes and rebalance the lab. Initial compiler builds take additional unattended time.
At 60–90 minutes per day, split each session over two days and plan for a calendar of about 60 days.
Four phases
Days 1–7
Compiler foundations
Compiler concepts and a small expression frontend written in C++.
Starts with understand what a compiler does.
Days 8–12
LLVM IR
Basic LLVM IR and an end-to-end compiled toy program.
Starts with read llvm intermediate representation.
Days 13–21
Clang frontend
Clang source navigation, C++ diagnostics and regression tests.
Starts with navigate the clang source tree.
Days 22–30
First contribution
Select, investigate, test and submit a small contribution.
Starts with choose a small useful contribution.
Before you start
You should be comfortable with C++ functions, classes, references, pointers, RAII, containers, basic templates, Git and terminal use. You do not need prior parsing, automata theory, assembly expertise or compiler coursework. If a prerequisite blocks a task, add a focused preparation session and shift the calendar instead of skipping the competency check.
Keep a learning repository separate from llvm-project for exercises, short daily notes, commands, tool versions and small output samples. A checked reading box does not by itself prove a day is complete: finish its lab and completion criterion. Days 7, 12, 21 and 30 are checkpoints. Repeat a blocked section when needed; the day numbers are a learning order, not a deadline.
Progress and notes stay in this browser only. Export them regularly.