[flang-commits] [flang] [mlir] [OpenMP][Flang] Add "IsolatedFromAbove" trait to omp.target (PR #67164)

[Kiran Chandramohan via flang-commits]

kiranchandramohan wrote:

> @kiranchandramohan @jeanPerier Sorry to bother both of you, but I've run into an issue with this patch.
> 
> When the target region contains a do while loop like in the example below, the loop code is absent entirely from the generated FIR/HLFIR.
> 
> This happens for the target data directive as well for which we added a similar custom region body generator some time back.
> 
> Any idea why?

I am assuming this happens only when there is unstructured code (code with jumps, do while etc) in the body of the operation. There is some special handling for unstructured code, have a look at https://github.com/llvm/llvm-project/blob/6c320b434d249c0d5692cbecc0e67ec22d659b7e/flang/lib/Lower/OpenMP.cpp#L2132

This is a separate issue and can be fixed in another patch.

https://github.com/llvm/llvm-project/pull/67164