gcc/testsuite/gcc.dg/tree-ssa/attr-alias.c

   1 /* { dg-do compile } */
   2 /* { dg-require-alias "" } */
   3 /* { dg-options "-O2 -fdump-tree-optimized -std=gnu89" } */
   4 void abort (void);
   5 __attribute__ ((weak))
   6 int test()
   7 {
   8    return 0;
   9 }
  10 static int test2() __attribute__ ((alias("test")));
  11 static int test1() __attribute__ ((weakref)) __attribute__ ((alias("test2")));
  12 static int test4() __attribute__ ((weakref)) __attribute__ ((alias("test")));
  13 main()
  14 {
  15   test();
  16   test2();
  17   test3();
  18   test4();
  19 }
  20
  21 /* calls to test1 and test2 can be inlined and optmized away. Calls
  22    to test and test4 are overwritable.  */
  23
  24 /* { dg-final { scan-tree-dump-times "  test " 1 "optimized" } } */
  25 /* { dg-final { scan-tree-dump-times "  test4 " 1 "optimized" } } */
  26 /* { dg-final { scan-tree-dump-not "  test1 " "optimized" } } */
  27 /* { dg-final { scan-tree-dump-not "  test2 " "optimized" } } */