tree 5c8dbef9cacb485f82de6eb375fda960227d6221
parent 0fbba1baeb45597fa5f44ff34f160f369f359b41
author Joel E. Denny <jdenny.ornl@gmail.com> 1685722693 -0400
committer Copybara-Service <copybara-worker@google.com> 1685723161 -0700

[OpenMP] Fix transformed loop's var privacy

Without this patch, the following example crashes Clang:

```
 #pragma omp target map(i)
 #pragma omp tile sizes(2)
 for (i = 0; i < N; ++i)
   ;
```

This patch fixes the crash by changing `Sema::isOpenMPPrivateDecl` not
to identify `i` as private just because it's the loop variable of a
`tile` construct.

While OpenMP TR11 and earlier do specify privacy for loop variables of
loops *generated* from a `tile` construct, I haven't found text
stating that the original loop variable must be private in the above
example, so this patch leaves it shared.  Even so, it is a bit
unexpected that value of `i` after the loop is `N - 1` instead of `N`.

Reviewed By: ABataev

Differential Revision: https://reviews.llvm.org/D151356

GitOrigin-RevId: 19841e4dcaabe573d35eb88a130fc34d32ecd708