[Bug c/86093] [8/9 Regression] volatile ignored on pointer in C

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86093

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44284
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44284&action=edit
gcc9-pr86093.patch

Untested fix.