[flang-commits] [flang] [Flang][OpenMP] Fix nested OpenMP mapper composition (PR #215639)

[Akash Banerjee via flang-commits]

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@@ -138,6 +138,75 @@ class MapInfoFinalizationPass
     return findMemberByIndexPath(op, indexPath) != nullptr;
   }
 
+  static bool mapperCoversIndexPath(
+      mlir::Operation *symbolTableAnchor, mlir::FlatSymbolRefAttr mapperId,
+      llvm::ArrayRef<int64_t> indexPath,
+      llvm::SmallPtrSetImpl<mlir::Operation *> &visitedMappers) {
+    mlir::omp::DeclareMapperOp symbol =
+        mlir::SymbolTable::lookupNearestSymbolFrom<mlir::omp::DeclareMapperOp>(
+            symbolTableAnchor, mapperId);
+    if (!symbol || !visitedMappers.insert(symbol.getOperation()).second)
+      return false;
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TIFitis wrote:

@agozillon This concern seemed genuine, so I've updated the PR along with the test. Let me know if you are happy with the new changes, thanks.

https://github.com/llvm/llvm-project/pull/215639