gcc/testsuite/gcc.dg/20001023-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fomit-frame-pointer" } */
   3
   4 unsigned char a[256], b[256], c[256], d[256];
   5
   6 void foo(unsigned char *x, int y, unsigned char *z)
   7 {
   8 }
   9
  10 void bar(int x, ...)
  11 {
  12 }
  13
  14 void baz(int y)
  15 {
  16   if (y != 0x10)
  17     abort();
  18 }
  19
  20 void test(int x, unsigned char *y)
  21 {
  22   unsigned char g,h,j, k[5],l[5], m[30];
  23   int i;
  24
  25   bar(x, y[0], y[1], y[2], y[3], y[4], y[5], y[6], y[7], y[8], y[9]);
  26   for (i = 5; --i >= 0; )
  27     k[i] = y[5 + i] ^ a[i] ^ c[i];
  28
  29   foo(&m[29], sizeof m, k);
  30   g = d[x] ^ c[x];
  31   bar(x, d[x], x, c[x]);
  32   baz(g);
  33   for (i = 5, h = 0; --i >= 0; h = y[i])
  34     {
  35       j = m[25 + i] ^ y[i];
  36       j = b[j] ^ g;
  37       k[i] = c[j] ^ h;
  38     }
  39   for (i = 5, h = 0; --i >= 0; h = k[i])
  40     {
  41       j = m[20 + i] ^ k[i];
  42       j = b[j] ^ g;
  43       l[i] = c[j] ^ h;
  44     }
  45   for (i = 5, h = 0; --i >= 0; h = l[i]) {
  46     j = m[15 + i] ^ l[i];
  47     j = b[j] ^ g;
  48     j = c[j] ^ h;
  49     k[i] = a[j] ^ c[j];
  50   }
  51 }
  52
  53 int main()
  54 {
  55   c[4] = 0xdc;
  56   d[4] = 0xcc;
  57   test(4, a);
  58   exit(0);
  59 }