gcc/testsuite/gcc.dg/vect/slp-36.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_shift } */
   3
   4 #define N 32
   5
   6 /* All the loops are vectorizable on platforms with vector shift argument.  */
   7
   8 void
   9 test_1 (void)
  10 {
  11   static unsigned int bm[N];
  12   static unsigned int cm[N];
  13   int j;
  14
  15   /* Vectorizable on platforms with scalar shift argument.  */
  16   for (j = 0; j < N/2; j++)
  17    {
  18     bm[2*j] <<= 8;
  19     bm[2*j+1] <<= 8;
  20    }
  21
  22   /* Not vectorizable on platforms with scalar shift argument.  */
  23   for (j = 0; j < N/2; j++)
  24    {
  25     cm[2*j] <<= 8;
  26     cm[2*j+1] <<= 7;
  27    }
  28 }
  29
  30 void
  31 test_2 (int a, int b)
  32 {
  33   static unsigned int bm[N];
  34   static unsigned int cm[N];
  35   int j;
  36
  37   /* Vectorizable on platforms with scalar shift argument.  */
  38   for (j = 0; j < N/2; j++)
  39    {
  40     bm[2*j] <<= a;
  41     bm[2*j+1] <<= a;
  42    }
  43
  44   /* Not vectorizable on platforms with scalar shift argument.  */
  45   for (j = 0; j < N/2; j++)
  46    {
  47     cm[2*j] <<= a;
  48     cm[2*j+1] <<= b;
  49    }
  50 }
  51
  52 void
  53 test_3 (void)
  54 {
  55  static unsigned int bm[N];
  56  int am[N];
  57  int j;
  58
  59  /* Not vectorizable on platforms with scalar shift argument.  */
  60  for (j = 0; j < N/2; j++)
  61    {
  62     bm[2*j] <<= am[j];
  63     bm[2*j+1] <<= am[j];
  64    }
  65
  66  /* Not vectorizable on platforms with scalar shift argument.  */
  67  for (j = 0; j < N/2; j++)
  68    {
  69     bm[2*j] <<= am[2*j];
  70     bm[2*j+1] <<= am[2*j+1];
  71    }
  72
  73 }
  74
  75 /* { dg-final { cleanup-tree-dump "vect" } } */