1  /* { dg-do run { target *-*-linux* *-*-gnu* } } */
       2  /* { dg-require-effective-target ia32 } */
       3  /* { dg-options "-O2 -fomit-frame-pointer" } */
       4  
       5  extern void abort (void);
       6  extern void exit (int);
       7  
       8  struct s {
       9    struct { int a; } a;
      10    int b;
      11    struct { struct { int a; } a; struct t { struct t *a, *b; } b; } c;
      12  };
      13  
      14  int bar(int (*fn)(void *), void *arg, unsigned long flags)
      15  {
      16    return 0;
      17  }
      18  
      19  int baz(void *x)
      20  {
      21    return 0;
      22  }
      23  
      24  void do_check (struct s *) asm ("do_check") __attribute__((regparm(1)));
      25  
      26  void __attribute__((regparm(1))) do_check(struct s *x)
      27  {
      28    if (x->a.a || x->b || x->c.a.a)
      29      abort();
      30    if (x->c.b.a != &x->c.b || x->c.b.b != &x->c.b)
      31      abort();
      32  }
      33  
      34  #define NT "\n\t"
      35  
      36  asm ("\n"
      37  "___checkme:"
      38  NT	"pushl %eax; pushl %ebx; pushl %ecx; pushl %edx; pushl %esi; pushl %edi"
      39  
      40  NT	"pushl $0; pushl $0; pushl $0; pushl $0; pushl $0"
      41  NT	"pushl $0; pushl $0; pushl $0; pushl $0; pushl $0"
      42  
      43  NT	"movl %ecx, %eax"
      44  NT	"call do_check"
      45  
      46  NT	"popl %eax; popl %eax; popl %eax; popl %eax; popl %eax"
      47  NT	"popl %eax; popl %eax; popl %eax; popl %eax; popl %eax"
      48  
      49  NT	"popl %edi; popl %esi; popl %edx; popl %ecx; popl %ebx;	popl %eax"
      50  NT	"ret"
      51  );
      52  
      53  extern inline void do_asm(struct s * x)
      54  {
      55    asm volatile("call ___checkme" : : "c" (x) : "memory");
      56  }
      57  
      58  int foo(void)
      59  {
      60    struct s x = { { 0 }, 0, { { 0 }, { &x.c.b, &x.c.b } } };
      61    bar(baz, &x, 1);
      62    do_asm(&x);
      63    bar(baz, &x, 1);
      64    do_asm(&x);
      65    return 0;
      66  }
      67  
      68  int main()
      69  {
      70    foo();
      71    exit(0);
      72  }