gcc/testsuite/gcc.c-torture/execute/20080719-1.c

   1 typedef unsigned int u32;
   2
   3 static const u32 deadfish = 0xdeadf155;
   4
   5 static const u32 cfb_tab8_be[] = {
   6     0x00000000,0x000000ff,0x0000ff00,0x0000ffff,
   7     0x00ff0000,0x00ff00ff,0x00ffff00,0x00ffffff,
   8     0xff000000,0xff0000ff,0xff00ff00,0xff00ffff,
   9     0xffff0000,0xffff00ff,0xffffff00,0xffffffff
  10 };
  11
  12 static const u32 cfb_tab8_le[] = {
  13     0x00000000,0xff000000,0x00ff0000,0xffff0000,
  14     0x0000ff00,0xff00ff00,0x00ffff00,0xffffff00,
  15     0x000000ff,0xff0000ff,0x00ff00ff,0xffff00ff,
  16     0x0000ffff,0xff00ffff,0x00ffffff,0xffffffff
  17 };
  18
  19 static const u32 cfb_tab16_be[] = {
  20     0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff
  21 };
  22
  23 static const u32 cfb_tab16_le[] = {
  24     0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff
  25 };
  26
  27 static const u32 cfb_tab32[] = {
  28  0x00000000, 0xffffffff
  29 };
  30
  31
  32
  33
  34
  35
  36 const u32 *xxx(int bpp)
  37 {
  38  const u32 *tab;
  39
  40 if (0) return &deadfish;
  41
  42  switch (bpp) {
  43  case 8:
  44   tab = cfb_tab8_be;
  45   break;
  46  case 16:
  47   tab = cfb_tab16_be;
  48   break;
  49  case 32:
  50  default:
  51   tab = cfb_tab32;
  52   break;
  53  }
  54
  55  return tab;
  56 }
  57
  58 int main(void)
  59 {
  60   const u32 *a = xxx(8);
  61   int b = a[0];
  62   if (b != cfb_tab8_be[0])
  63     __builtin_abort ();
  64   return 0;
  65 }