[flang] [llvm] [mlir] [mlir][OpenMP] - MLIR to LLVMIR translation support for delayed privatization of allocatables in `omp.target` ops (PR #116576)

[Sergio Afonso via llvm-commits]

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@@ -3829,6 +3863,17 @@ convertOmpTarget(Operation &opInst, llvm::IRBuilderBase &builder,
   bool isTargetDevice = ompBuilder->Config.isTargetDevice();
   auto parentFn = opInst.getParentOfType<LLVM::LLVMFuncOp>();
   auto &targetRegion = targetOp.getRegion();
+  // Holds the private vars that have been mapped along with the block argument
+  // that corresponds to the MapInfoOp corresponding to the private var in
+  // question. So, for instance:
+  //
+  // %10 = omp.map.info var_ptr(%6#0 : !fir.ref<!fir.box<!fir.heap<i32>>>, ..)
+  // omp.target map_entries(%10 -> %arg0) private(@box.privatizer %6#0-> %arg1)
+  //
+  // Then, %10 has been created so that the descriptor can be used by the
+  // privatizer @box.privatizer on the device side. Here we'd record {%6#0, 0}
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skatrak wrote:

```suggestion
  // privatizer @box.privatizer on the device side. Here we'd record {%6#0, %arg0}
```

https://github.com/llvm/llvm-project/pull/116576