gcc/testsuite/gcc.dg/plugin/self-assign-test-1.c

   1 /* Test the self-assignemnt detection plugin.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O" } */
   4
   5 struct Bar {
   6   int b_;
   7   int c_;
   8 };
   9
  10 int g;
  11
  12 int main()
  13 {
  14   struct Bar *bar;
  15   int x = x; /* { dg-warning "assigned to itself" } */
  16   static int y;
  17   struct Bar b_array[5];
  18
  19   b_array[x+g].b_ = b_array[x+g].b_; /* { dg-warning "self-assignment detected" "" { xfail *-*-* } } */
  20   g = g; /* { dg-warning "assigned to itself" } */
  21   y = y; /* { dg-warning "assigned to itself" } */
  22   bar->b_ = bar->b_; /* { dg-warning "assigned to itself" } */
  23 }