gcc/testsuite/gcc.dg/pr44214-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -freciprocal-math -fdump-tree-original" } */
   3
   4 void do_div (_Complex double *a, _Complex double *b)
   5 {
   6   *a = *b / (4.0 - 5.0fi);
   7 }
   8
   9 /* Constant folding should multiply *b by the reciprocal of 4 - 5i
  10    = 4/41 + (5/41)i.  */
  11
  12 /* { dg-final { scan-tree-dump-times " \\\* " 1 "original" } } */
  13 /* { dg-final { scan-tree-dump-times " / " 0 "original" } } */
  14 /* { dg-final { cleanup-tree-dump "original" } } */