method-4.m

来自「linux下编程用 编译软件」· M 代码 · 共 26 行

/* Check if class references (generated for the NeXT runtime) are appropriately 
   folded.  This test is safe to run on all targets.  */
/* Author: Ziemowit Laski <[e-mail]>.  */
/* { dg-options "-fnext-runtime" } */
/* { dg-do compile } */

#include <objc/Object.h>

typedef Object ObjectTypedef1;
typedef ObjectTypedef1 ObjectTypedef2;
@compatibility_alias ObjectAlias1 ObjectTypedef2;
@compatibility_alias ObjectAlias2 ObjectAlias1;
typedef ObjectAlias2 ObjectTypedef3;

void foo(void) {
  id obj = [Object new];
  obj = [ObjectTypedef1 new];
  obj = [ObjectTypedef2 new];
  obj = [ObjectTypedef3 new];
  obj = [ObjectAlias1 new];
  obj = [ObjectAlias2 new];
}

/* { dg-final { scan-assembler "_OBJC_CLASS_REFERENCES_0" } } */
/* { dg-final { scan-assembler-not "_OBJC_CLASS_REFERENCES_1" } } */