[Bug c++/98988] delete is not a constant expression with -fsanitize=undefined

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98988

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Some sanitizers imply -fno-delete-null-pointer-checks and this testcase fails
with  fno-delete-null-pointer-checks too - the &heap_magic_var_decl != NULL
comparison in that case which is done on delete is not folded into true.
Wonder if at least for the magic heap vars we shouldn't fold comparisons
against NULL, because those will never live in any memory and thus we can
pretend their address will never be 0.