[Bug tree-optimization/86214] [8/9 Regression] Strongly increased stack usage

[steinar+gcc at gunderson dot no]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86214

--- Comment #4 from Steinar H. Gunderson <steinar+gcc at gunderson dot no> ---
New test case added. It's quite a bit larger than the old one, but has no
-Wreturn-type warning.