gcc/testsuite/gcc.dg/vect/pr82436.c

   1 /* { dg-do compile } */
   2 /* { dg-additional-options "-Ofast -fno-tree-scev-cprop" } */
   3 /* { dg-additional-options "-mavx2" { target { x86_64-*-* i?86-*-* } } } */
   4
   5 struct reflection_type
   6 {
   7   int h;
   8   int k;
   9   int l;
  10   double f_exp;
  11   double f_sigma;
  12   _Complex double f_calc;
  13   double f_pred;
  14   double i_exp;
  15   double i_sigma;
  16   double i_pred;
  17 };
  18
  19 double y, w;
  20 int foo (struct reflection_type *r, int n, unsigned s)
  21 {
  22   int i;
  23   y = 0;
  24   w = 0;
  25   for (i = 1; i < n; ++i)
  26     {
  27       struct reflection_type *x = &r[i*s];
  28       double fpred = x->f_pred;
  29       double fexp = x->f_exp;
  30       double tem = (fpred - fexp);
  31       y += __builtin_fabs (tem / x->f_sigma);
  32       w += __builtin_fabs (tem / fexp);
  33     }
  34   return i;
  35 }