modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/20020227-1.c (about)

     1  /* This testcase failed on mmix-knuth-mmixware.  Problem was with storing
     2     to an unaligned mem:SC, gcc tried doing it by parts from a (concat:SC
     3     (reg:SF 293) (reg:SF 294)).  */
     4  
     5  typedef __complex__ float cf;
     6  struct x { char c; cf f; } __attribute__ ((__packed__));
     7  extern void f2 (struct x*);
     8  extern void f1 (void);
     9  int
    10  main (void)
    11  {
    12    f1 ();
    13    exit (0);
    14  }
    15  
    16  void
    17  f1 (void)
    18  {
    19    struct x s;
    20    s.f = 1;
    21    s.c = 42;
    22    f2 (&s);
    23  }
    24  
    25  void
    26  f2 (struct x *y)
    27  {
    28    if (y->f != 1 || y->c != 42)
    29      abort ();
    30  }