[Bug testsuite/82390] gcc.dg/torture tests run with same optimization level

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82390

--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 42287
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42287&action=edit
tentative patch