[Bug tree-optimization/68673] Handle __builtin_GOMP_task optimally in ipa-pta

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68673

--- Comment #2 from vries at gcc dot gnu.org ---
Created attachment 36910
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36910&action=edit
tentative patch, part 1, handles f1 and f2