https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105523
--- Comment #24 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to LIU Hao from comment #22)
> Yes, GCC should be told to shut up about dereferencing artificial address
> values.
NO.
Take:
```
static inline int f(int *a)
{
return a[10];
}
int g()
{
return f(0);
}
```
The warning is there for the above case really (and similar ones with struct
offsets). Where you originally have a null pointer and have an offset from
there; by the time the warning happens, the IR does not know if it was
originally from an offset of a null pointer or if the value was written in. The
paramater is there to "tune" the heurstic to figure out if it is null pointer
deference or if it is some real (HW) address. Maybe
-fno-delete-null-pointer-checks should imply --param=min-pagesize=0, though
some folks want the warning indepdent of trying to delete null pointer checks.
