1  /* { dg-do compile } */
       2  /* Profitable from Power8 since it supports efficient unaligned load.  */
       3  /* { dg-options "-Ofast -mdejagnu-cpu=power8 -fdump-tree-vect-details -fdump-tree-forwprop4" } */
       4  
       5  #ifndef INDEXTYPE
       6  #define INDEXTYPE unsigned int
       7  #endif
       8  double vmul(INDEXTYPE *rowstart, INDEXTYPE *rowend,
       9  	    double *luval, double *dst)
      10  {
      11    double res = 0;
      12    for (const INDEXTYPE * col = rowstart; col != rowend; ++col, ++luval)
      13          res += *luval * dst[*col];
      14    return res;
      15  }
      16  
      17  /* With gather emulation this should be profitable to vectorize from Power8.  */
      18  /* { dg-final { scan-tree-dump "loop vectorized" "vect" } } */
      19  /* The index vector loads and promotions should be scalar after forwprop.  */
      20  /* { dg-final { scan-tree-dump-not "vec_unpack" "forwprop4" } } */