File: pr44468.c

package info (click to toggle)
gcc-arm-none-eabi 15%3A12.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 959,712 kB
  • sloc: cpp: 3,275,382; ansic: 2,061,766; ada: 840,956; f90: 208,513; makefile: 76,132; asm: 73,433; xml: 50,448; exp: 34,146; sh: 32,436; objc: 15,637; fortran: 14,012; python: 11,991; pascal: 6,787; awk: 4,779; perl: 3,054; yacc: 338; ml: 285; lex: 201; haskell: 122
file content (60 lines) | stat: -rw-r--r-- 984 bytes parent folder | download | duplicates (10) 
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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
 
#include <stddef.h>

struct S {
  int i;
  int j;
};
struct R {
  int k;
  struct S a;
};
struct Q {
  float k;
  struct S a;
};
struct Q s;
int __attribute__((noinline,noclone))
test1 (void *q)
{
  struct S *b = (struct S *)((char *)q + sizeof (int));
  s.a.i = 0;
  b->i = 3;
  return s.a.i;
}
int __attribute__((noinline,noclone))
test2 (void *q)
{
  struct S *b = &((struct R *)q)->a;
  s.a.i = 0;
  b->i = 3;
  return s.a.i;
}
int __attribute__((noinline,noclone))
test3 (void *q)
{
  s.a.i = 0;
  ((struct S *)((char *)q + sizeof (int)))->i = 3;
  return s.a.i;
}
extern void abort (void);
int
main()
{
  if (sizeof (float) != sizeof (int)
      || offsetof (struct R, a) != sizeof (int)
      || offsetof (struct Q, a) != sizeof (int))
    return 0;
  s.a.i = 1;
  s.a.j = 2;
  if (test1 ((void *)&s) != 3)
    abort ();
  s.a.i = 1;
  s.a.j = 2;
  if (test2 ((void *)&s) != 3)
    abort ();
  s.a.i = 1;
  s.a.j = 2;
  if (test3 ((void *)&s) != 3)
    abort ();
  return 0;
}