no-scevccp-outer-13.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7
   8 unsigned short in[N];
   9
  10 __attribute__ ((noinline)) unsigned int
  11 foo (short scale){
  12   int i;
  13   unsigned short j;
  14   unsigned int sum = 0;
  15   unsigned short sum_j;
  16
  17   for (i = 0; i < N; i++) {
  18     sum_j = 0;
  19     for (j = 0; j < N; j++) {
  20       sum_j += j;
  21     }
  22     sum += ((unsigned int) in[i] * (unsigned int) sum_j) >> scale;
  23   }
  24   return sum;
  25 }
  26
  27 __attribute__ ((noinline)) unsigned short
  28 bar (void)
  29 {
  30   unsigned short j;
  31   unsigned short sum_j;
  32     sum_j = 0;
  33     for (j = 0; j < N; j++) {
  34       sum_j += j;
  35     }
  36   return sum_j;
  37 }
  38
  39 int main (void)
  40 {
  41   int i;
  42   unsigned short j, sum_j;
  43   unsigned int sum = 0;
  44   unsigned int res;
  45
  46   check_vect ();
  47
  48   for (i=0; i<N; i++){
  49     in[i] = i;
  50   }
  51
  52   res = foo (2);
  53
  54   /* check results:  */
  55   for (i=0; i<N; i++)
  56     {
  57       sum_j = bar ();
  58       sum += ((unsigned int) in[i] * (unsigned int) sum_j) >> 2;
  59     }
  60   if (res != sum)
  61     abort ();
  62
  63   return 0;
  64 }
  65
  66 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED." 1 "vect" { target vect_widen_mult_hi_to_si } } } */
  67 /* { dg-final { cleanup-tree-dump "vect" } } */