gcc/testsuite/gcc.dg/pr83844.c

   1 /* PR c/83844 */
   2 /* { dg-do compile { target int32plus } } */
   3 /* { dg-options "-O0 -Wall" } */
   4 /* { dg-require-effective-target alloca } */
   5
   6 typedef unsigned long long __u64 __attribute__((aligned(4),warn_if_not_aligned(8)));
   7 void bar (void *, void *, void *);
   8
   9 void
  10 foo (int n)
  11 {
  12   struct A
  13   {
  14     int i1;
  15     int i2;
  16     int i3[n];
  17     __u64 x;    /* { dg-warning "in 'struct A' may not be aligned to 8" } */
  18   } __attribute__((aligned (8)));
  19   struct B
  20   {
  21     int i1;
  22     int i2;
  23     long long i3[n];
  24     __u64 x;
  25   } __attribute__((aligned (8)));
  26   struct C
  27   {
  28     int i1;
  29     int i2;
  30     int i3[2 * n];
  31     __u64 x;
  32   } __attribute__((aligned (8)));
  33   struct A a;
  34   struct B b;
  35   struct C c;
  36   bar (&a, &b, &c);
  37 }