For struct {} a[4]; int main() { return &a[2] - &a[1]; }
the C frontend emits return 0 /[ex] 0; which will, at -O0 fault at runtime, at -O not due to RTL CSE. Is this even well-defined? Should the C-frontend rather emit return 0; ? Of course this contradicts the C standard, but that does not allow empty structures anyway. -- Summary: array-of-empty-structure extension not properly defined Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: rguenth at gcc dot gnu dot org CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21664