[Bug target/69994] [6 regression] test case gfortran.dg/reassoc_6.f fails starting with r233669

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69994

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 37821
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37821&action=edit
untested fix

Patch I am testing.