How REX Made Literal Scalar Target Parameters Match The Modern OpenMP Launch ABI

Fri, 24 Apr 2026 00:00:00 +0000

The previous post fixed the rules around launch geometry. REX may use source-level tripcount knowledge to improve compiler-owned launch defaults, but it must not silently rewrite explicit user launch clauses just to win a benchmark.

That made the next performance layer easier to see.

Once the launch shape is fair, the generated host still has to describe the target region to the OpenMP offload runtime. That description includes every argument:

Abi on ./Code

How REX Made Literal Scalar Target Parameters Match The Modern OpenMP Launch ABI