[Bug middle-end/94111] Wrong constant folding: decimal floating-point infinity casted to double -> zero

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94111

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 48009
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48009&action=edit
gcc10-pr94111.patch

Untested fix.