gcc/testsuite/gcc.dg/uninit-B-O0.c

   1 /* Origin: PR c/179 from Gray Watson <gray@256.com>, adapted as a testcase
   2    by Joseph Myers <jsm28@cam.ac.uk>.  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-Wuninitialized" } */
   5 extern void foo (int *);
   6 extern void bar (int);
   7
   8 void
   9 baz (void)
  10 {
  11   int i;
  12   if (i) /* { dg-warning "'i' is used uninitialized" } */
  13     bar (i);
  14   foo (&i);
  15 }