gcc/testsuite/gcc.dg/graphite/pr67984.c

   1 /* { dg-options "-O2 -floop-nest-optimize" } */
   2
   3 void foo(int N, float *x, float *X)
   4 {
   5   float sum = 0.;
   6   for (int n = 0; n < N; ++n)
   7     sum += x[n];
   8
   9   X[0] = sum;
  10
  11   for (unsigned int k = 1; k < N; ++k) {
  12     sum = 0.;
  13     for (int n = 0; n < N; ++n)
  14       sum += x[n] * ((float)(3.14159265358979323846 * (n + .5) * k / N));
  15     X[k] = sum;
  16   }
  17 }