llvm-project

258cb467 - [mlir][acc] Add acc serial to acc parallel conversion (#170189)

[mlir][acc] Add acc serial to acc parallel conversion (#170189) This patch introduces a new transformation pass that converts `acc.serial` constructs into `acc.parallel` constructs with num_gangs(1), num_workers(1), and vector_length(1). The transformation is semantically equivalent since an OpenACC serial region executes sequentially, which is identical to a parallel region with a single gang, worker, and vector. This unification simplifies processing of acc regions by enabling code reuse in later compilation stages. Co-authored-by: Vijay Kandiah <vkandiah@nvidia.com>