i386-bitfield2.c

来自「Mac OS X 10.4.9 for x86 Source Code gcc」· C语言 代码 · 共 24 行

// Test for bitfield alignment in structs on IA-32
// { dg-do run { target i?86-*-* } }
/* { dg-skip-if "" { i?86-*-* } { "-m64" } { "" } } */
// { dg-options "-O2" }
// { dg-options "-mno-align-double -mno-ms-bitfields" { target i?86-*-interix* i?86-*-cygwin* i?86-*-mingw* } }

extern void abort (void);
extern void exit (int);

struct X {
  char a;
  long long : 0;
  char b;
} x;

int main () {
  if (&x.b - &x.a != 4)
    abort ();
  if (sizeof (x) != 5)
    abort ();
  
  exit (0);
}