[Bug sanitizer/85029] [8 Regression] -fsanitize=undefined internal compiler error: in maybe_optimize_ubsan_ptr_ifn, at sanopt.c:493

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85029

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43730
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43730&action=edit
gcc8-pr85029.patch

Untested fix.