modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/20020120-1.c (about)

     1  /* This ICEed on IA-32 with -O2 -mcpu=i386, because reload was trying
     2     to reload into %sil register.  */
     3  
     4  struct A
     5  {
     6    void *a;
     7    unsigned int b, c, d;
     8  };
     9  
    10  struct B
    11  {
    12    struct A *e;
    13  };
    14  
    15  void bar (struct A *);
    16  void baz (struct A *);
    17  
    18  static inline unsigned int
    19  inl (unsigned int v, unsigned char w, unsigned char x, unsigned char y,
    20       unsigned char z)
    21  {
    22    switch (v)
    23      {
    24      case 2:
    25        return ((w & 0xf8) << 8) | ((x & 0xfc) << 3) | ((y & 0xf8) >> 3);
    26      case 4:
    27        return (z << 24) | (w << 16) | (x << 8) | y;
    28      default:
    29        return 0;
    30      }
    31  }
    32  
    33  void foo (struct B *x, int y, const float *z)
    34  {
    35    struct A *a = x->e;
    36  
    37    if (y)
    38      {
    39        if (x->e->a)
    40         bar (x->e);
    41      }
    42    else
    43      {
    44        unsigned char c[4];
    45        unsigned int b;
    46  
    47        c[0] = z[0]; c[1] = z[1]; c[2] = z[2]; c[3] = z[3];
    48        b = inl (a->b, c[0], c[1], c[2], c[3] );
    49        if (a->a)
    50         bar (a);
    51        else
    52         baz (a);
    53        a->c = b;
    54     }
    55  }