BRANCH_TODO      |  91 ++++
 src/AstGen.zig   | 321 +-------------
 src/Module.zig   |  23 +-
 src/RangeSet.zig |   3 +
 src/Sema.zig     | 743 ++++++++++++++++++++++++--------
 src/type.zig     |   4 +
 src/zir.zig      | 177 +++++---
 7 files changed, 827 insertions(+), 535 deletions(-)