gcc/testsuite/gcc.dg/tree-ssa/nonzero-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdelete-null-pointer-checks" } */
   3
   4 /* { dg-skip-if "" keeps_null_pointer_checks } */
   5 extern int a; /* { dg-error "declared weak after being used" } */
   6 int
   7 t()
   8 {
   9   return &a!=0;
  10 }
  11 extern int a __attribute__ ((weak));