gcc/testsuite/gcc.dg/vect/no-scevccp-outer-7.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 unsigned short coef[N];
  10 unsigned short a[N];
  11
  12 __attribute__ ((noinline)) unsigned int
  13 foo (short scale){
  14   int i;
  15   unsigned short j;
  16   unsigned int sum = 0;
  17   unsigned short sum_j;
  18
  19   for (i = 0; i < N; i++) {
  20     sum_j = 0;
  21     for (j = 0; j < N; j++) {
  22       sum_j += j;
  23     }
  24     a[i] = sum_j;
  25     sum += ((unsigned int) in[i] * (unsigned int) coef[i]) >> scale;
  26   }
  27   return sum;
  28 }
  29
  30 unsigned short
  31 bar (void)
  32 {
  33   unsigned short j;
  34   unsigned short sum_j;
  35
  36   sum_j = 0;
  37   for (j = 0; j < N; j++) {
  38     sum_j += j;
  39   }
  40
  41   return sum_j;
  42 }
  43
  44 int main (void)
  45 {
  46   int i;
  47   unsigned short j, sum_j;
  48   unsigned int sum = 0;
  49   unsigned int res;
  50
  51   check_vect ();
  52
  53   for (i=0; i<N; i++){
  54     in[i] = 2*i;
  55     coef[i] = i;
  56   }
  57
  58   res = foo (2);
  59
  60   /* check results:  */
  61   for (i=0; i<N; i++)
  62     {
  63       if (a[i] != bar ())
  64         abort ();
  65       sum += ((unsigned int) in[i] * (unsigned int) coef[i]) >> 2;
  66     }
  67   if (res != sum)
  68     abort ();
  69
  70   return 0;
  71 }
  72
  73 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED." 1 "vect" { target vect_widen_mult_hi_to_si } } } */
  74 /* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 1 "vect" } } */
  75 /* { dg-final { cleanup-tree-dump "vect" } } */