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

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