1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/* { dg-options "-fno-inline" } */
/* Check that stack alignment is not affected by variables not placed
on the stack. */
#include <assert.h>
#define ALIGNMENT 64
unsigned test(unsigned n, unsigned p)
{
static struct { char __attribute__((__aligned__(ALIGNMENT))) c; } s;
unsigned x;
assert(__alignof__(s) == ALIGNMENT);
asm ("" : "=g" (x), "+m" (s) : "0" (&x));
return n ? test(n - 1, x) : (x ^ p);
}
unsigned test2(unsigned n, unsigned p)
{
static struct { char c; } s;
unsigned x;
assert(__alignof__(s) != ALIGNMENT);
asm ("" : "=g" (x), "+m" (s) : "0" (&x));
return n ? test2(n - 1, x) : (x ^ p);
}
int main (int argc, char *argv[] __attribute__((unused)))
{
unsigned int x, y;
x = test(argc, 0);
x |= test(argc + 1, 0);
x |= test(argc + 2, 0);
y = test2(argc, 0);
y |= test2(argc + 1, 0);
y |= test2(argc + 2, 0);
return (x & (ALIGNMENT - 1)) == 0 && (y & (ALIGNMENT - 1)) != 0 ? 1 : 0;
}
|
