[Bug c/25954] New: external variable address assumed not to be zero

["frederic dot petrot at lip6 dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

Tested on gcc 4.0.2 20050808 and gcc 4.0.3 20051013 

I don't know if this is a bug or a feature : this code, also
compiled without optimization, doesn't check if the address of
the variable is zero.

extern unsigned long int __spm_addr;
int main(void)
{
     return &__spm_addr ? __spm_addr + 1 : -1;
}

gcc 3.x checks the variable address.


-- 
           Summary: external variable address assumed not to be zero
           Product: gcc
           Version: 4.0.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: frederic dot petrot at lip6 dot fr


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25954