gcc/testsuite/gcc.dg/nrv2.c

   1 /* Test that the tree_nrv pass works by making sure that we don't generate
   2    a memcpy.  Throw in a bit of control flow to make its job a bit harder.  */
   3
   4 /* { dg-options "-O" } */
   5
   6 struct A { int i[100]; };
   7
   8 int b;
   9
  10 struct A f ()
  11 {
  12   struct A a;
  13   if (b)
  14     {
  15       a.i[0] = 42;
  16       return a;
  17     }
  18   else
  19     {
  20       a.i[42] = 1;
  21       return a;
  22     }
  23 }
  24
  25 /* { dg-final { scan-assembler-not "memcpy" } } */