[Bug tree-optimization/84334] [8 Regression] Stack overflow with -Ofast -frounding-math

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84334

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43403
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43403&action=edit
gcc8-pr84334.patch

Untested fix.