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

   1 /* { dg-require-effective-target vect_float } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7
   8 float results1[N] = {192.00,240.00,288.00,336.00,384.00,432.00,480.00,528.00,0.00};
   9 float results2[N] = {0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,54.00,120.00,198.00,288.00,390.00,504.00,630.00};
  10
  11 __attribute__ ((noinline))
  12 int main1 ()
  13 {
  14   int i;
  15   float a[N] = {0};
  16   float e[N] = {0};
  17   float b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
  18   float c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  19
  20   for (i = 0; i < N/2; i++)
  21     {
  22       a[i] = b[i+N/2] * c[i+N/2] - b[i] * c[i];
  23       e[i+N/2] = b[i] * c[i+N/2] + b[i+N/2] * c[i];
  24     }
  25
  26   /* check results:  */
  27   for (i=0; i<N; i++)
  28     {
  29       if (a[i] != results1[i] || e[i] != results2[i])
  30         abort();
  31     }
  32
  33
  34   for (i = 1; i <=N-4; i++)
  35     {
  36       a[i+3] = b[i-1];
  37     }
  38
  39   /* check results:  */
  40   for (i = 1; i <=N-4; i++)
  41     {
  42       if (a[i+3] != b[i-1])
  43         abort ();
  44     }
  45
  46   return 0;
  47 }
  48
  49 int main (void)
  50 {
  51   check_vect ();
  52
  53   return main1 ();
  54 }
  55
  56 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" } } */
  57 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 0 "vect" } } */
  58 /* { dg-final { cleanup-tree-dump "vect" } } */