================ @@ -202,6 +202,57 @@ variables: `i` and `j`. These are locally allocated inside the parallel/target OpenMP region similar to what the single-range example in previous section shows. +### Data environment + +By default, variables that are used inside a `do concurrent` loop nest are +either treated as `shared` in case of mapping to `host`, or mapped into the +`target` region using a `map` clause in case of mapping to `device`. The only +exceptions to this are: + 1. the loop's iteration variable(s) (IV) of **perfect** loop nests. In that + case, for each IV, we allocate a local copy as shown by the mapping + examples above. + 1. any values that are from allocations outside the loop nest and used + exclusively inside of it. In such cases, a local privatized + copy is created in the OpenMP region to prevent multiple teams of threads ---------------- skatrak wrote:
Nit: In the OpenMP parallel region? https://github.com/llvm/llvm-project/pull/127635 _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
