Vx – One Language, Every Chip

A data-oriented parallel frontend Every symbol, nominal type and monomorphized variant is a flat 256-bit identifier. A nominal type system plus mandatory boxing for recursive types decouples modules, so the pipeline runs parallel across cores with no query engine and no lock contention. Compilation walks flat arrays rather than pointer-chased trees. The same source compiles to byte-identical MLIR whether it is built serially or in parallel. That is asserted in the test suite rather than hoped for — at benchmark scale, at one thread, at four, and with the thread pool taken off the path entirely, plus a corpus recompiled in fresh processes so each run gets its own hash seed. The claim is about the MLIR the frontend emits; everything downstream of it belongs to LLVM. Backends Vendors extend the compiler through MLIR pass plugins rather than by patching it.