blob: f27c223614b0f4d6ef18498b3e46706154eda577 (
plain)
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
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main ()
{
struct foo {
int part1: 8;
int nothing : 1;
int part2 : 5;
int lots_more_nothing : 3;
int some_padding; /* for 64-bit hosts */
float some_more_nothing;
double yet_more_nothing;
};
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
struct foo* q = (struct foo *) malloc (offsetof (struct foo, some_more_nothing));
q->nothing = 1; /* touch q */
/* The RHS of the following expression is meant to trigger a
fold-const.c mapping the expression to a BIT_FIELD_REF. It glues
together the accesses to the two non-neighbouring bitfields into a
single bigger boolean test. */
q->lots_more_nothing = (q->part1 == 13 && q->part2 == 7);
free (q);
return 0;
}
|