gcc/testsuite/gcc.dg/uninit-pr19430-O0.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O0 -Wuninitialized" } */
   3 extern int bar (int);
   4 extern void baz (int *);
   5
   6 int
   7 foo (int i)
   8 {
   9   int j; /* { dg-warning "'j' may be used uninitialized in this function" "uninitialized" { xfail *-*-* } } */
  10
  11   if (bar (i)) {
  12     baz (&j);
  13   } else {
  14   }
  15
  16   return j;
  17 }
  18
  19 int foo2( void ) {
  20   int rc;
  21   return rc; /* { dg-warning "'rc' is used uninitialized in this function" } */
  22   *&rc = 0;
  23 }
  24
  25 extern int printf(const char *, ...);
  26 void frob(int *pi);
  27
  28 int main(void)
  29 {
  30   int i;
  31   printf("i = %d\n", i); /* { dg-warning "'i' is used uninitialized in this function" } */
  32   frob(&i);
  33
  34   return 0;
  35 }
  36
  37 void foo3(int*);
  38 void bar3(void) {
  39   int x;
  40   if(x) /* { dg-warning "'x' is used uninitialized in this function" } */
  41     foo3(&x);
  42 }