gcc/testsuite/gcc.dg/pr23911.c

   1 /* This was a missed optimization in tree constant propagation
   2    that CSE would catch later on.  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-O2 -fdump-tree-store_ccp" } */
   5
   6 double _Complex *a;
   7 static const double _Complex b[10] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
   8
   9 void
  10 test (void)
  11 {
  12   a[0] = b[0] + b[1];
  13   a[1] = b[0] + b[1];
  14   return;
  15 }
  16
  17 /* After store_ccp, there should not be any assignments from real or
  18    imaginary parts anymore.  The constants should be loaded from b and
  19    propagated into the elements of a.  */
  20 /* { dg-final { scan-tree-dump-times "= CR" 0 "store_ccp" } } */
  21 /* { dg-final { scan-tree-dump-times "= CI" 0 "store_ccp" } } */
  22 /* { dg-final { cleanup-tree-dump "store_ccp" } } */