[Bug middle-end/50060] intrinsics not folded by the middle-end

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50060

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38912
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38912&action=edit
gcc7-pr50060.patch

Untested patch (for -std=c++14 and later only).