[clang] [mlir] [OpenACC][CIR] Implement Loop lowering of seq/auto/independent (PR #138164)

[Razvan Lupusoru via cfe-commits]

https://github.com/razvanlupusoru approved this pull request.

Awesome. Thank you for continuing to contribute the builders to the dialect.

https://github.com/llvm/llvm-project/pull/138164