[Bug middle-end/107236] [OpenMP] ICE for reverse offload: in expand_GOMP_TARGET_REV, at internal-fn.cc:376

[burnus at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107236

--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
The problem seems to be that:

execute_omp_device_lower ()
...
        tree lhs = gimple_call_lhs (stmt), rhs = NULL_TREE;
        tree type = lhs ? TREE_TYPE (lhs) : integer_type_node;
        switch (gimple_call_internal_fn (stmt))
          {
          case IFN_GOMP_TARGET_REV:
is never reached.

Thus, IFN_GOMP_TARGET_REV remains - and the assert that IFN_GOMP_TARGET_REV has
been removed fails, leading to the ICE.

It seems as if pass_omp_device_lower::gate(...) wrongly skips the generated
nested
function for parallel. The current check is:

      return (!(fun->curr_properties & PROP_gimple_lomp_dev)
              || (flag_openmp
                  && cgraph_node::get (fun->decl)->calls_declare_variant_alt));