1  /* { dg-do compile } */
       2  /* { dg-require-weak "" } */
       3  /* { dg-require-alias "" } */
       4  /* { dg-options "-O2 -fdump-tree-optimized" } */
       5  static int dummy = 0;
       6  extern int foo __attribute__((__weak__, __alias__("dummy")));
       7  int bar() { if (foo) return 1; return 0; }
       8  /* { dg-final { scan-tree-dump-not "return 0" "optimized"} } */