llvm-project

b0c1de2a - [flang][OpenMP] Support omx/ompx extension sentinels (#218475)

[flang][OpenMP] Support omx/ompx extension sentinels (#218475) This adds support for the OpenMP 5.2 extension sentinels: !$omx, c$omx, *$omx in fixed form and !$ompx in free form. Known directives after these sentinels are handled just like !$omp, and unknown ones are ignored with a warning so code using vendor extensions stays portable. Added lit tests covering fixed form, free form, and the ignore-with-warning behavior. Assisted-by: Claude Opus 4.6 --------- Co-authored-by: Chandra Ghale <ghale@pe34genoa.hpc.amslabs.hpecorp.net> Co-authored-by: Krzysztof Parzyszek <Krzysztof.Parzyszek@amd.com>