How `ompparser` Turns OpenMP Pragmas Into `OpenMPIR` In REX

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

The previous posts in this series covered two frontend boundaries around this stage:

how REX preserves OpenMP pragmas instead of letting Clang swallow them,
and how Stage 2 converts OpenMPIR into SgOmp* nodes in the Sage AST.

What was still missing was the parser itself.

That missing step matters because it is where directive text stops being “a pragma string we carried forward” and becomes a compiler data structure that later stages can reason about.

Parser on ./Code

How `ompparser` Turns OpenMP Pragmas Into `OpenMPIR` In REX