gcc/testsuite/gcc.dg/torture/pr77478.c

   1 /* { dg-do run } */
   2 /* { dg-additional-options "-ffast-math" } */
   3
   4 static const float A[10] = {1};
   5
   6 float
   7 foo(float *f, int n)
   8 {
   9   int i, j;
  10   float a = 0, b = 0;
  11   for (i = n/2; i < n; i++)
  12     a += f[i]*.1f;
  13   for (i = n/2, j = 0; i < n; i++, j++)
  14     b += f[i]*A[j]+a*A[j];
  15   return b;
  16 }
  17
  18 int main()
  19 {
  20   float a[21] = {0};
  21   return foo(a+1, 20) + foo(a, 20);
  22 }