[Bug tree-optimization/46032] openmp inhibits loop vectorization

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46032

--- Comment #11 from vries at gcc dot gnu.org ---
The ipa-pta solution no longer works. In 4.6, we had:
...
  # USE = anything
  # CLB = anything
  GOMP_parallel_startD.1048 (main._omp_fn.0D.1472, &.omp_data_o.1D.1484, 0);
  # USE = anything
  # CLB = anything
  main._omp_fn.0D.1472 (&.omp_data_o.1D.1484);
  # USE = anything
  # CLB = anything
  GOMP_parallel_endD.1049 ();
...

On trunk, we have now:
...
  # USE = anything
  # CLB = anything
  GOMP_parallelD.1345 (main._omp_fn.0D.1844, &.omp_data_o.1D.1856, 0, 0);
...

So there's no longer a path in the call graph from main to main._omp_fn.
Perhaps a dummy body for GOMP_parallel could fix that.