gcc/testsuite/c-c++-common/rotate-10.c

   1 /* PR tree-optimization/108440 */
   2 /* { dg-do compile { target { { ilp32 || lp64 } || llp64 } } } */
   3 /* { dg-options "-O2 -fdump-tree-optimized" } */
   4 /* { dg-final { scan-tree-dump-times " r<< " 5 "optimized" } } */
   5 /* { dg-final { scan-tree-dump-times " \\\& 7;" 4 "optimized" } } */
   6
   7 unsigned char
   8 foo (unsigned char x, unsigned int y)
   9 {
  10   if (y > __CHAR_BIT__)
  11     __builtin_unreachable ();
  12   return (x << y) | (x >> ((-y) & (__CHAR_BIT__ - 1)));
  13 }
  14
  15 unsigned char
  16 bar (unsigned char x, unsigned int y)
  17 {
  18   if (y >= __CHAR_BIT__)
  19     __builtin_unreachable ();
  20   return (x << y) | (x >> ((-y) & (__CHAR_BIT__ - 1)));
  21 }
  22
  23 unsigned char
  24 baz (unsigned char x, unsigned int y)
  25 {
  26   if (y > __CHAR_BIT__ && y != 2 * __CHAR_BIT__)
  27     __builtin_unreachable ();
  28   return (x << y) | (x >> ((-y) & (__CHAR_BIT__ - 1)));
  29 }
  30
  31 unsigned char
  32 qux (unsigned char x, unsigned int y)
  33 {
  34   if (y > __CHAR_BIT__ && y != 2 * __CHAR_BIT__ && y != __CHAR_BIT__ + 2)
  35     __builtin_unreachable ();
  36   return (x << y) | (x >> ((-y) & (__CHAR_BIT__ - 1)));
  37 }
  38
  39 unsigned char
  40 quux (unsigned char x, unsigned int y)
  41 {
  42   if (y > __CHAR_BIT__)
  43     __builtin_unreachable ();
  44   return (x << y) | (x >> (__CHAR_BIT__ - y));
  45 }
  46
  47 unsigned char
  48 corge (unsigned char x, unsigned int y)
  49 {
  50   if (y >= __CHAR_BIT__)
  51     __builtin_unreachable ();
  52   return (x << y) | (x >> (__CHAR_BIT__ - y));
  53 }