gcc/testsuite/gcc.dg/vect/no-scevccp-outer-13.c

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