[Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80536

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Would dropping the fold call from save_expr fix this?