gcc/testsuite/gcc.target/i386/pr55845.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target avx } */
   3 /* { dg-options "-O3 -ffast-math -fschedule-insns -mavx -mvzeroupper" } */
   4
   5 #include "avx-check.h"
   6
   7 #define N 100
   8
   9 double
  10 __attribute__((noinline))
  11 foo (int size, double *y, double *x)
  12 {
  13   double sum = 0.0;
  14   int i;
  15   for (i = 0, sum = 0.; i < size; i++)
  16     sum += y[i] * x[i];
  17   return sum;
  18 }
  19
  20 static void
  21 __attribute__ ((noinline))
  22 avx_test ()
  23 {
  24   double x[N];
  25   double y[N];
  26   double s;
  27   int i;
  28
  29   for (i = 0; i < N; i++)
  30     {
  31       x[i] = i;
  32       y[i] = i;
  33     }
  34
  35   s = foo (N, y, x);
  36
  37   if (s != 328350.0)
  38     abort ();
  39 }