gcc/testsuite/gcc.dg/uninit-pred-2_c.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wuninitialized -O2" } */
   3
   4 int g;
   5 void bar (void);
   6 void blah (int);
   7
   8 int foo (int n, int m, int r)
   9 {
  10   int flag = 0;
  11   int v;
  12
  13   if (n)
  14     {
  15       v = r;
  16       flag = 1;
  17     }
  18
  19   if (m) g++;
  20   else bar();
  21
  22   if (flag)
  23     blah(v); /* { dg-bogus "uninitialized" "bogus uninitialized var warning" } */
  24
  25   return 0;
  26 }
  27
  28 int foo_2 (int n, int m, int r)
  29 {
  30   int flag = 0;
  31   int v;
  32
  33   if (n)
  34     {
  35       v = r;
  36       flag = 1;
  37     }
  38
  39   if (m) g++;
  40   else bar();
  41
  42   if (flag)
  43     blah(v); /* { dg-bogus "uninitialized" "bogus uninitialized var warning" } */
  44   else
  45     blah(v); /* { dg-warning "uninitialized" "real uninitialized var warning" } */
  46
  47   return 0;
  48 }