用于进行gcc测试

				/* { dg-do compile } */								struct A				{				    double d[2];				    double foo(int i) { return d[i]; }				};								struct B : public A {};								void bar(B& b)				{				    for (int i=0; i				        b.d[i] = b.foo(i);				}								/* { dg-final { cleanup-tree-dump "vect" } } */