[Bug rtl-optimization/89303] [8 Regression] memory leak with shared_ptr and enable_shared_from_this

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89303

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 45672
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45672&action=edit
Reduced testcase

This (partially) reduced version fails with 8.2.1 or trunk when -O1 is used.