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

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdelete-null-pointer-checks -fdump-tree-optimized" } */
   3 /* { dg-require-weak "" } */
   4
   5 /* { dg-skip-if "" keeps_null_pointer_checks } */
   6 extern int a;
   7 int
   8 t()
   9 {
  10   /* { dg-final { scan-tree-dump "&a != 0" "optimized" } } */
  11   return &a!=0;
  12 }
  13 extern int a __attribute__ ((weak));