linux下编程用 编译软件

				/* Test that the tree_nrv pass works by making sure that we don't generate				   a memcpy.  Throw in a bit of control flow to make its job a bit harder.  */								/* { dg-options "-O" } */								struct A { int i[100]; };								int b;								struct A f ()				{				  struct A a;				  if (b)				    {				      a.i[0] = 42;				      return a;				    }				  else				    {				      a.i[42] = 1;				      return a;				    }				}								/* { dg-final { scan-assembler-not "memcpy" } } */