gcc/testsuite/gcc.dg/pr59924.c

   1 /* PR tree-optimization/59924 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O1 -Wall" } */
   4
   5 struct S { struct T *a; double b; struct S *c; };
   6 struct T { struct S *d; };
   7 extern void bar (double);
   8
   9 void
  10 foo (struct S * x, int y, int z, int w)
  11 {
  12   int e;
  13   struct S *f;
  14   for (f = x->a->d; f; f = f->c)
  15     {
  16       if (5 < w)
  17         {
  18           e = -w;
  19           z = w;
  20         }
  21     }
  22   if (y != 0 || z != 0)
  23     {
  24       double g = x->b + (double) e * (double) y; /* { dg-warning "may be used uninitialized" } */
  25       bar (g * g);
  26     }
  27 }