IRx

IRx is the semantic-analysis, LLVM-lowering, and native-runtime layer of the ArxLang ecosystem. Its distribution is pyirx, while its Python import is irx.

Status: functional experimental backend. The supported subset is broad but does not cover every ASTx node.

Current capabilities

• module-graph expansion, imports, scopes, symbols, and resolved sidecars
• scalar typing, numeric promotion, casts, functions, templates, and FFI
• structured control flow, assertions, and diagnostics
• class layout, inheritance, method resolution, and dispatch metadata
• buffer views, dynamic lists, arrays, tensors, DataFrames, and Series
• LLVM IR translation, object emission, native linking, and execution
• on-demand C/C++ runtime feature compilation
• native Apache Arrow arrays, arrow::Tensor, arrow::Table, arrow::ChunkedArray, and RecordBatch IPC

Arrow support

IRx keeps Arrow C++ ownership behind opaque C ABI handles. Generated LLVM calls IRx runtime symbols rather than reproducing Arrow layouts in IR.

The public RecordBatch Python API supports schemas, builders, nullable values, numeric and Boolean columns, UTF-8/large UTF-8, date/time/timestamp values, IPC file and memory streams, and PyArrow interoperability.

See Runtime Features and Native Apache Arrow Support.

Boundary

IRx does not parse source languages or define a query language. ASTx owns the node model; frontends own syntax; IRx owns semantic meaning and lowering.