[clang] [llvm] [openmp] [OpenMP] Taskgraph Clang 'record and replay' frontend support (PR #159774)

[Julian Brown via cfe-commits]

jtb20 wrote:

The location hash used in the `print_omp` tests is very sensitive to code changes (and may not even generate unique IDs sufficiently well), so that probably wants attention (at least as a follow-up patch at some point).

https://github.com/llvm/llvm-project/pull/159774