73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
/* { dg-do run { target *-*-linux* } } */
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/* { dg-require-effective-target ilp32 } */
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/* { dg-options "-O2 -fomit-frame-pointer" } */
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extern void abort (void);
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extern void exit (int);
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struct s {
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struct { int a; } a;
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int b;
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struct { struct { int a; } a; struct t { struct t *a, *b; } b; } c;
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};
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int bar(int (*fn)(void *), void *arg, unsigned long flags)
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{
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return 0;
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}
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int baz(void *x)
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{
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return 0;
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}
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void do_check (struct s *) asm ("do_check") __attribute__((regparm(1)));
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void __attribute__((regparm(1))) do_check(struct s *x)
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{
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if (x->a.a || x->b || x->c.a.a)
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abort();
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if (x->c.b.a != &x->c.b || x->c.b.b != &x->c.b)
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abort();
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}
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#define NT "\n\t"
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asm ("\n"
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"___checkme:"
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NT "pushl %eax; pushl %ebx; pushl %ecx; pushl %edx; pushl %esi; pushl %edi"
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NT "pushl $0; pushl $0; pushl $0; pushl $0; pushl $0"
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NT "pushl $0; pushl $0; pushl $0; pushl $0; pushl $0"
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NT "movl %ecx, %eax"
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NT "call do_check"
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NT "popl %eax; popl %eax; popl %eax; popl %eax; popl %eax"
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NT "popl %eax; popl %eax; popl %eax; popl %eax; popl %eax"
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NT "popl %edi; popl %esi; popl %edx; popl %ecx; popl %ebx; popl %eax"
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NT "ret"
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);
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extern inline void do_asm(struct s * x)
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{
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asm volatile("call ___checkme" : : "c" (x) : "memory");
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}
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int foo(void)
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{
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struct s x = { { 0 }, 0, { { 0 }, { &x.c.b, &x.c.b } } };
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bar(baz, &x, 1);
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do_asm(&x);
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bar(baz, &x, 1);
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do_asm(&x);
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return 0;
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}
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int main()
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{
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foo();
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exit(0);
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}
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