gcc/testsuite/gcc.target/i386/bitfield2.c

   1 // Test for bitfield alignment in structs on IA-32
   2 // { dg-do run }
   3 // { dg-require-effective-target ia32 }
   4 // { dg-options "-O2 -mno-align-double -mno-ms-bitfields" }
   5
   6 extern void abort (void);
   7 extern void exit (int);
   8
   9 struct X {
  10   char a;
  11   long long : 0;
  12   char b;
  13 } x;
  14
  15 int main () {
  16   if (&x.b - &x.a != 4)
  17     abort ();
  18   if (sizeof (x) != 5)
  19     abort ();
  20
  21   exit (0);
  22 }