modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/20050316-3.c (about)

     1  /* { dg-options "-Wno-psabi" } */
     2  extern void abort (void);
     3  
     4  typedef int V2SI __attribute__ ((vector_size (8)));
     5  typedef unsigned int V2USI __attribute__ ((vector_size (8)));
     6  typedef short V2HI __attribute__ ((vector_size (4)));
     7  typedef unsigned int V2UHI __attribute__ ((vector_size (4)));
     8  
     9  V2USI
    10  test1 (V2SI x)
    11  {
    12    return (V2USI) (V2SI) (long long) x;
    13  }
    14  
    15  long long
    16  test2 (V2SI x)
    17  {
    18    return (long long) (V2USI) (V2SI) (long long) x;
    19  }
    20  
    21  int
    22  main (void)
    23  {
    24    if (sizeof (short) != 2 || sizeof (int) != 4 || sizeof (long long) != 8)
    25      return 0;
    26  
    27    union { V2SI x; int y[2]; V2USI z; long long l; } u;
    28    V2SI a = { -3, -3 };
    29    u.z = test1 (a);
    30    if (u.y[0] != -3 || u.y[1] != -3)
    31      abort ();
    32  
    33    u.l = test2 (a);
    34    if (u.y[0] != -3 || u.y[1] != -3)
    35      abort ();
    36    return 0;
    37  }