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

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -Wuninitialized" } */
   3 extern int bar (int);
   4 extern void baz (int *);
   5 int
   6 foo (int i)
   7 {
   8   int j; /* { dg-warning "'j' may be used uninitialized in this function" "uninitialized" { xfail *-*-* } 8 } */
   9
  10   if (bar (i)) {
  11     baz (&j);
  12   } else {
  13   }
  14
  15   return j;
  16 }
  17
  18
  19
  20 int foo2( void ) {
  21   int rc;
  22   return rc;  /* { dg-warning "'rc' is used uninitialized in this function" } */
  23   *&rc = 0;
  24 }
  25
  26 extern int printf(const char *, ...);
  27 void frob(int *pi);
  28
  29 int main(void)
  30 {
  31   int i;
  32   printf("i = %d\n", i); /* { dg-warning "'i' is used uninitialized in this function" "" } */
  33   frob(&i);
  34
  35   return 0;
  36 }
  37
  38 void foo3(int*);
  39 void bar3(void) {
  40   int x;
  41   if(x) /* { dg-warning "'x' is used uninitialized in this function" "uninitialized" } */
  42     foo3(&x);
  43 }