[Openmp-commits] [clang] [flang] [llvm] [openmp] [Clang][OpenMP][LoopTransformations] Add support for "#pragma omp fuse" loop transformation directive and "looprange" clause (PR #139293)

[Michael Kruse via Openmp-commits]

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@@ -14236,28 +14279,282 @@ bool SemaOpenMP::checkTransformableLoopNest(
         return false;
       },
       [&OriginalInits](OMPLoopBasedDirective *Transform) {
-        Stmt *DependentPreInits;
-        if (auto *Dir = dyn_cast<OMPTileDirective>(Transform))
-          DependentPreInits = Dir->getPreInits();
-        else if (auto *Dir = dyn_cast<OMPStripeDirective>(Transform))
-          DependentPreInits = Dir->getPreInits();
-        else if (auto *Dir = dyn_cast<OMPUnrollDirective>(Transform))
-          DependentPreInits = Dir->getPreInits();
-        else if (auto *Dir = dyn_cast<OMPReverseDirective>(Transform))
-          DependentPreInits = Dir->getPreInits();
-        else if (auto *Dir = dyn_cast<OMPInterchangeDirective>(Transform))
-          DependentPreInits = Dir->getPreInits();
-        else
-          llvm_unreachable("Unhandled loop transformation");
-
-        appendFlattenedStmtList(OriginalInits.back(), DependentPreInits);
+        updatePreInits(Transform, OriginalInits.back());
       });
   assert(OriginalInits.back().empty() && "No preinit after innermost loop");
   OriginalInits.pop_back();
   return Result;
 }
 
-/// Add preinit statements that need to be propageted from the selected loop.
+/// Counts the total number of nested loops, including the outermost loop (the
----------------
Meinersbur wrote:

```suggestion
/// Counts the total number of OpenMP canonical nested loops, including the outermost loop (the
```
I think it is worth mentioning that this is not about every loop, but what OpenMP considers to be a loop, maybe even in the class name.

https://github.com/llvm/llvm-project/pull/139293