How REX Made Sage AST Checkpoints Round-Trip Through JSON

Thu, 02 Jul 2026 00:00:00 +0000

Compilers are full of useful internal boundaries that are hard to make real.

In REX, one of those boundaries sits around the OpenMP path. A source file goes through Clang/Flang frontend work, Sage AST construction, OpenMP pragma parsing, OpenMP AST construction, lowering, unparsing, and sometimes generated helper files for offloading. Each step has a reasonable conceptual input and output. But the actual object moving through the compiler is not a small value. It is a pointer-rich Sage tree inside an SgProject, tied to types, scopes, symbol tables, file locations, token streams, comments, directives, hidden declarations, and transformation side tables.

Serialization on ./Code

How REX Made Sage AST Checkpoints Round-Trip Through JSON