[Openmp-commits] [openmp] [OpenMP] Fix work-stealing stack clobber with taskwait (PR #126049)

[Julian Brown via Openmp-commits]

jtb20 wrote:

This version adjusts the assertions to avoid conditionally growing the kmp_depnode_t type, and just adds another wait-loop to __kmpc_omp_taskwait_deps_51, at @jpeyton52 and @jprotze 's suggestion. Borrowing bit 0 of the refcount was an idea I had whilst investigating this bug earlier, but the last version of the patch didn't need it. Doing that (vs. adding a new "on_stack" field) allows us to make the new assertions have essentially zero extra cost.

https://github.com/llvm/llvm-project/pull/126049