[PATCH] D30135: [OpenMP] Generate better diagnostics for cancel and cancellation point

[Alexey Bataev via Phabricator via cfe-commits]

ABataev added inline comments.


================
Comment at: lib/Sema/SemaOpenMP.cpp:1959
 
+static bool CheckCancelRegion(Sema &SemaRef, OpenMPDirectiveKind CurrentRegion,
+                              OpenMPDirectiveKind CancelRegion,
----------------
Hahnfeld wrote:
> ABataev wrote:
> > Should be `checkCancelRegion`
> It's also `CheckNestingOfRegions`, but can do
Old formatting, this should be fixed


================
Comment at: lib/Sema/SemaOpenMP.cpp:1968-1973
+  if (CancelRegion != OMPD_parallel && CancelRegion != OMPD_for &&
+      CancelRegion != OMPD_sections && CancelRegion != OMPD_taskgroup) {
+    SemaRef.Diag(StartLoc, diag::err_omp_wrong_cancel_region)
+        << getOpenMPDirectiveName(CancelRegion);
+    return true;
+  }
----------------
Hahnfeld wrote:
> ABataev wrote:
> > It is better to convert this to return `false` and make error message and `return true` statement unconditional
> I wanted to keep the style in `CheckNestingOfRegions`: That way it's easier to add more checks later on if needed like additional restrictions on `CancelRegion`
I just meant that it's better to make it look like this:
```
if (CancelRegion == OMPD_parallel || CancelRegion == OMPD_for ||
    CancelRegion == OMPD_sections || CancelRegion == OMPD_taskgroup)
  return false;

SemaRef.Diag(StartLoc, diag::err_omp_wrong_cancel_region)
  << getOpenMPDirectiveName(CancelRegion);
return true;
```


https://reviews.llvm.org/D30135