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

   1 /* { dg-do run { target powerpc*-*-* } } */
   2 /* { dg-do run { target i?86-*-* x86_64-*-* } } */
   3 /* { dg-options "-O2 -ftree-vectorize -fdump-tree-vect-stats -maltivec" { target powerpc*-*-* } } */
   4 /* { dg-options "-O2 -ftree-vectorize -fdump-tree-vect-stats -msse2" { target i?86-*-* x86_64-*-* } } */
   5
   6 #include <stdarg.h>
   7 #include "tree-vect.h"
   8
   9 #define N 16
  10
  11 float results1[N] = {192.00,240.00,288.00,336.00,384.00,432.00,480.00,528.00,0.00};
  12 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};
  13
  14 int main1 ()
  15 {
  16   int i;
  17   float a[N] = {0};
  18   float e[N] = {0};
  19   float b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
  20   float c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  21
  22   for (i = 0; i < N/2; i++)
  23     {
  24       a[i] = b[i+N/2] * c[i+N/2] - b[i] * c[i];
  25       e[i+N/2] = b[i] * c[i+N/2] + b[i+N/2] * c[i];
  26     }
  27
  28   /* check results:  */
  29   for (i=0; i<N; i++)
  30     {
  31       if (a[i] != results1[i] || e[i] != results2[i])
  32         abort();
  33     }
  34
  35
  36   for (i = 1; i <=N-4; i++)
  37     {
  38       a[i+3] = b[i-1];
  39     }
  40
  41   /* check results:  */
  42   for (i = 1; i <=N-4; i++)
  43     {
  44       if (a[i+3] != b[i-1])
  45         abort ();
  46     }
  47
  48   return 0;
  49 }
  50
  51 int main (void)
  52 {
  53   check_vect ();
  54
  55   return main1 ();
  56 }
  57
  58 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" } } */
  59
  60