gcc/testsuite/gcc.c-torture/execute/pr51933.c

   1 /* PR rtl-optimization/51933 */
   2
   3 static signed char v1;
   4 static unsigned char v2[256], v3[256];
   5
   6 __attribute__((noclone, noinline)) void
   7 foo (void)
   8 {
   9 #if defined(__s390__) && !defined(__zarch__)
  10   /* S/390 31 bit cannot deal with more than one literal pool
  11      reference per insn.  */
  12   asm volatile ("" : : "g" (&v1) : "memory");
  13   asm volatile ("" : : "g" (&v2[0]));
  14   asm volatile ("" : : "g" (&v3[0]));
  15 #else
  16   asm volatile ("" : : "g" (&v1), "g" (&v2[0]), "g" (&v3[0]) : "memory");
  17 #endif
  18 }
  19
  20 __attribute__((noclone, noinline)) int
  21 bar (const int x, const unsigned short *y, char *z)
  22 {
  23   int i;
  24   unsigned short u;
  25   if (!v1)
  26     foo ();
  27   for (i = 0; i < x; i++)
  28     {
  29       u = y[i];
  30       z[i] = u < 0x0100 ? v2[u] : v3[u & 0xff];
  31     }
  32   z[x] = '\0';
  33   return x;
  34 }
  35
  36 int
  37 main (void)
  38 {
  39   char buf[18];
  40   unsigned short s[18];
  41   unsigned char c[18] = "abcdefghijklmnopq";
  42   int i;
  43   for (i = 0; i < 256; i++)
  44     {
  45       v2[i] = i;
  46       v3[i] = i + 1;
  47     }
  48   for (i = 0; i < 18; i++)
  49     s[i] = c[i];
  50   s[5] |= 0x600;
  51   s[6] |= 0x500;
  52   s[11] |= 0x2000;
  53   s[15] |= 0x500;
  54   foo ();
  55   if (bar (17, s, buf) != 17
  56       || __builtin_memcmp (buf, "abcdeghhijkmmnoqq", 18) != 0)
  57     __builtin_abort ();
  58   return 0;
  59 }