gcc/testsuite/c-c++-common/rotate-9.c

   1 /* PR tree-optimization/86401 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fno-ipa-icf -fdump-tree-optimized" } */
   4 /* { dg-final { scan-tree-dump-times "r\[<>]\[<>]" 2 "optimized" } } */
   5
   6 unsigned int
   7 f1 (unsigned int x, unsigned int s)
   8 {
   9   unsigned int t = s % (__CHAR_BIT__ * __SIZEOF_INT__);
  10   return (x << t) | (x >> (((__CHAR_BIT__ * __SIZEOF_INT__) - t) % (__CHAR_BIT__ * __SIZEOF_INT__)));
  11 }
  12
  13 unsigned int
  14 f2 (unsigned int x, unsigned int s)
  15 {
  16   int n = __CHAR_BIT__ * __SIZEOF_INT__;
  17   unsigned int t = s % n;
  18   return (x << t) | (x >> ((n - t) % n));
  19 }