gcc/testsuite/gcc.dg/vect/pr107160.c

   1 #include <math.h>
   2
   3 #define N 128
   4 float fl[N];
   5
   6 __attribute__ ((noipa)) void
   7 init ()
   8 {
   9   for (int i = 0; i < N; i++)
  10     fl[i] = i;
  11 }
  12
  13 __attribute__ ((noipa)) float
  14 foo (int n1)
  15 {
  16   float sum0, sum1, sum2, sum3;
  17   sum0 = sum1 = sum2 = sum3 = 0.0f;
  18
  19   int n = (n1 / 4) * 4;
  20   for (int i = 0; i < n; i += 4)
  21     {
  22       sum0 += fabs (fl[i]);
  23       sum1 += fabs (fl[i + 1]);
  24       sum2 += fabs (fl[i + 2]);
  25       sum3 += fabs (fl[i + 3]);
  26     }
  27
  28   return sum0 + sum1 + sum2 + sum3;
  29 }
  30
  31 int
  32 main ()
  33 {
  34   init ();
  35   float res = foo (80);
  36   if (res != 3160)
  37     __builtin_abort ();
  38   return 0;
  39 }