gcc/testsuite/gcc.target/i386/bitfield3.c

   1 // Test for bitfield alignment in structs on IA-32
   2 // { dg-do run }
   3 // { dg-options "-O2" }
   4 // { dg-additional-options "-mno-align-double -mno-ms-bitfields" { target *-*-interix* } }
   5 // { dg-additional-options "-mno-ms-bitfields" { target *-*-mingw* } }
   6
   7 extern void abort (void);
   8 extern void exit (int);
   9
  10 struct X {
  11   int : 32;
  12 };
  13
  14 struct Y {
  15   int i : 32;
  16 };
  17
  18 int main () {
  19   if (__alignof__(struct X) != 1)
  20     abort ();
  21   if (__alignof__(struct Y) != 4)
  22     abort ();
  23
  24   exit (0);
  25 }