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/* { dg-do run { target *-*-linux* *-*-gnu* } } */
/* { dg-require-effective-target ia32 } */
/* { dg-options "-O2 -fomit-frame-pointer" } */
extern void abort (void);
extern void exit (int);
struct s {
struct { int a; } a;
int b;
struct { struct { int a; } a; struct t { struct t *a, *b; } b; } c;
};
int bar(int (*fn)(void *), void *arg, unsigned long flags)
{
return 0;
}
int baz(void *x)
{
return 0;
}
void do_check (struct s *) asm ("do_check") __attribute__((regparm(1)));
void __attribute__((regparm(1))) do_check(struct s *x)
{
if (x->a.a || x->b || x->c.a.a)
abort();
if (x->c.b.a != &x->c.b || x->c.b.b != &x->c.b)
abort();
}
#define NT "\n\t"
asm ("\n"
"___checkme:"
NT "pushl %eax; pushl %ebx; pushl %ecx; pushl %edx; pushl %esi; pushl %edi"
NT "pushl $0; pushl $0; pushl $0; pushl $0; pushl $0"
NT "pushl $0; pushl $0; pushl $0; pushl $0; pushl $0"
NT "movl %ecx, %eax"
NT "call do_check"
NT "popl %eax; popl %eax; popl %eax; popl %eax; popl %eax"
NT "popl %eax; popl %eax; popl %eax; popl %eax; popl %eax"
NT "popl %edi; popl %esi; popl %edx; popl %ecx; popl %ebx; popl %eax"
NT "ret"
);
extern inline void do_asm(struct s * x)
{
asm volatile("call ___checkme" : : "c" (x) : "memory");
}
int foo(void)
{
struct s x = { { 0 }, 0, { { 0 }, { &x.c.b, &x.c.b } } };
bar(baz, &x, 1);
do_asm(&x);
bar(baz, &x, 1);
do_asm(&x);
return 0;
}
int main()
{
foo();
exit(0);
}
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