gcc/testsuite/c-c++-common/Wcast-align.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wcast-align=strict" } */
   3
   4 typedef char __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) c;
   5 typedef struct __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)))
   6 {
   7   char x;
   8 } d;
   9
  10 char *x;
  11 c *y;
  12 d *z;
  13 struct s { long long x; } *p;
  14 struct t { double x; } *q;
  15
  16 void
  17 foo (void)
  18 {
  19   y = (c *) x;  /* { dg-warning "alignment" } */
  20   z = (d *) x;  /* { dg-warning "alignment" } */
  21   (long long *) p;  /* { dg-bogus "alignment" } */
  22   (double *) q;     /* { dg-bogus "alignment" } */
  23 }