File: alias-1.c

package info (click to toggle)
gcc-riscv64-unknown-elf 8.3.0.2019.08%2Bdfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 680,956 kB
  • sloc: ansic: 3,237,715; cpp: 896,882; ada: 772,854; f90: 144,254; asm: 68,788; makefile: 67,456; sh: 29,743; exp: 28,045; objc: 15,273; fortran: 11,885; python: 7,369; pascal: 5,375; awk: 3,725; perl: 2,872; yacc: 316; xml: 311; ml: 285; lex: 198; haskell: 122
file content (39 lines) | stat: -rw-r--r-- 647 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
 
/* { dg-do run } */
/* { dg-options "-fschedule-insns" } */
/* { dg-require-effective-target scheduling } */

extern void abort (void) __attribute__((noreturn));

struct B { int a; int b;};
struct wrapper {
union setconflict
{
  struct S { char one1; struct B b1; } s;
  struct T { struct B b2; char two2; } t;
} a;
};

int
main ()
{
  int sum = 0;
  int i;
  struct wrapper w;
  struct B *p;

  p = &w.a.s.b1;
  asm ("": "=r" (p):"0" (p));
  p->a = 0;
  asm ("": "=r" (p):"0" (p));
  sum += p->a;

  p = &w.a.t.b2;
  asm ("": "=r" (p):"0" (p));
  p->b = 1;
  asm ("": "=r" (p):"0" (p));
  sum += p->b;

  if (sum != 1)
    abort();
  return 0;
}