gcc/testsuite/gcc.dg/uninit-11.c

   1 /* Positive test for uninitialized variables.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O -Wuninitialized" } */
   4
   5 int sink;
   6
   7 void f1(int parm)       /* { dg-bogus "uninitialized" "parameter" } */
   8 {
   9   sink = parm;          /* { dg-bogus "uninitialized" "parameter" } */
  10 }
  11
  12 void f2(void)
  13 {
  14   int x;
  15   sink = x;             /* { dg-warning "is used" "unconditional" } */
  16 }
  17
  18 void f3(int p)
  19 {
  20   int x;                /* { dg-warning "may be used" "conditional" } */
  21   if (p)
  22     x = p;
  23   sink = x;
  24 }
  25
  26 void f4(int p)
  27 {
  28   int x;                /* { dg-bogus "uninitialized" "easy if" } */
  29   if (p)
  30     x = 1;
  31   else
  32     x = 2;
  33   sink = x;
  34 }
  35
  36 void f5(void)
  37 {
  38   int x, i;             /* { dg-bogus "uninitialized" "easy loop" } */
  39   for (i = 0; i < 10; ++i)
  40     x = 1;
  41   sink = x;
  42 }