[Bug lto/81816] ICE in lto1 with -fopenmp offloading and nested #pragma omp target

[igor.venevtsev at intel dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81816

--- Comment #3 from Igor Venevtsev <igor.venevtsev at intel dot com> ---
Created attachment 42049
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42049&action=edit
Proposed so-called 'patch';)

I've got an idea to replace target construct by its body in outer context. It
fixes ICE, but breaks a lot of OpenACC tests;) And yes, without ICE nested
target region will be lowered to GOMP_target_ext() call in target context and
this behavior is undefined according to OpenMP specification. Maybe the place
of transformation is not correct or else the transformation itself is
absolutely wrong. I attached the 'patch' in hope it could be useful.