[Bug tree-optimization/97623] [9/10/11 Regression] Extremely slow O2 compile (>>O(n^2))

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97623

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 49462
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49462&action=edit
modified testcase

Moved the #defines, with -DNO_TOP -DNO_BOTTOM -DNO_FINAL there's now 5 insert
iterations instead of the usually expected two.