gcc/testsuite/gcc.target/i386/pr47564.c

   1 /* PR target/47564 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -msse2 -std=gnu89" } */
   4
   5 static inline unsigned long long
   6 foo (const unsigned char *p)
   7 {
   8   return 1;
   9 }
  10
  11 __attribute__ ((__target__ ("sse4"))) void
  12 bar (unsigned long long *x, const void *b, long long m)
  13 {
  14   const unsigned char *p = (const unsigned char *) b;
  15   const unsigned char *e = p + m;
  16   unsigned int l = *x;
  17   unsigned long long n = l;
  18
  19   if ((e - p) >= 8192)
  20     {
  21       while ((e - p) >= 128)
  22         {
  23           n = __builtin_ia32_crc32di (n, foo (p));
  24           n = __builtin_ia32_crc32di (n, foo (p));
  25           n = __builtin_ia32_crc32di (n, foo (p));
  26           n = __builtin_ia32_crc32di (n, foo (p));
  27           n = __builtin_ia32_crc32di (n, foo (p));
  28           n = __builtin_ia32_crc32di (n, foo (p));
  29           n = __builtin_ia32_crc32di (n, foo (p));
  30           n = __builtin_ia32_crc32di (n, foo (p));
  31           n = __builtin_ia32_crc32di (n, foo (p));
  32         }
  33     }
  34
  35   while ((e - p) >= 16)
  36     {
  37       n = __builtin_ia32_crc32di (n, foo (p));
  38       n = __builtin_ia32_crc32di (n, foo (p));
  39     }
  40   l = n;
  41   *x = l;
  42 }