[Bug tree-optimization/61515] [4.9/5 Regression] Extremely long compile time for generated code

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61515

--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, why is it recording twice a temporary equivalence?  Might be simpler even
with

  /* Now invalidate all equivalencies we have to invalidate.  */
  unsigned i;
  sbitmap_iterator bi;
  EXECUTE_IF_SET_IN_BITMAP (to_invalidate, 0, i, bi)
    record_temporary_equivalence (ssa_name (i), NULL_TREE, stack);