[Bug c++/70410] New: no uninitialized variable warning if 'offsetof' is used in expression

[sergiusthebest at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70410

            Bug ID: 70410
           Summary: no uninitialized variable warning if 'offsetof' is
                    used in expression
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sergiusthebest at hotmail dot com
  Target Milestone: ---

You can easily reproduce the issue with the following code:

#include <stddef.h>

struct C
{
  int x;
  int y;
};

int main()
{
  int a;
  int b = a + offsetof(C, y); // <= missing warning that 'a' is uninitialized
  return b;
}