gcc/testsuite/gcc.dg/vect/vect-outer-6.c

   1 /* { dg-require-effective-target vect_float } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 64
   7 #define MAX 42
   8
   9 float A[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  10 float B[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  11 float C[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  12 float D[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  13 extern void abort(void);
  14
  15 __attribute__ ((noinline))
  16 int main1 ()
  17 {
  18   float s;
  19
  20   int i, j;
  21
  22   for (i = 0; i < N; i++)
  23     {
  24       s = 0;
  25       for (j = 0; j < N; j += 4)
  26         s += C[j];
  27       A[i] = s;
  28     }
  29
  30   return 0;
  31 }
  32
  33 int main ()
  34 {
  35   int i,j;
  36   float s;
  37
  38   check_vect ();
  39
  40   for (i = 0; i < N; i++)
  41     {
  42       A[i] = i;
  43       B[i] = i;
  44       C[i] = i;
  45       D[i] = i;
  46     }
  47
  48   main1();
  49
  50   /* check results:  */
  51   for (i = 0; i < N; i++)
  52     {
  53       s = 0;
  54       for (j = 0; j < N; j += 4)
  55         s += C[j];
  56       if (A[i] != s)
  57         abort ();
  58     }
  59
  60   return 0;
  61 }
  62
  63 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" } } */
  64 /* { dg-final { scan-tree-dump-times "zero step in outer loop." 1 "vect" } } */