gcc/testsuite/gcc.dg/vect/pr98674.c

   1 /* { dg-do compile } */
   2 /* { dg-additional-options "-msse2" { target sse2 } } */
   3
   4 void swap(short *p, int cnt)
   5 {
   6   while (cnt-- > 0)
   7     {
   8       *p = ((*p << 8) & 0xFF00) | ((*p >> 8) & 0x00FF);
   9       ++p;
  10     }
  11 }
  12
  13 /* Dependence analysis should not fail.  */
  14 /* { dg-final { scan-tree-dump "dependence distance == 0" "vect" } } */
  15 /* On x86 with SSE2 we can vectorize this with psllw/psrlw.  */
  16 /* { dg-final { scan-tree-dump "loop vectorized" "vect" { target sse2 } } } */