[Bug tree-optimization/91734] gcc skip an if statement with "-O1 -ffast-math"

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91734

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46871
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46871&action=edit
gcc10-pr91734.patch

Untested patch that does the 2), though for LE_EXPR only.