gcc/testsuite/gcc.dg/globalalias.c

   1 /* This test checks that local aliases behave sanely.  This is necessary for code correctness
   2    of aliases introduced by ipa-visibility pass.
   3
   4    This test expose weird behavior of AIX's .set pseudo-op where the global symbol is created,
   5    but all uses of the alias are syntactically replaced by uses of the target.  This means that
   6    both counters are increased to 2.  */
   7
   8 /* { dg-do run }
   9    { dg-options "-O2" }
  10    { dg-require-alias "" }
  11    { dg-additional-sources "globalalias-2.c" } */
  12 extern int test2count;
  13 extern void abort (void);
  14 extern void tt ();
  15 int testcount;
  16 static
  17 void test(void)
  18 {
  19   testcount++;
  20 }
  21 __attribute__ ((weak,noinline))
  22 __attribute ((alias("test")))
  23 void test2(void);
  24
  25 int main()
  26 {
  27   test();
  28   /* This call must bind locally.  */
  29   if (!testcount)
  30     abort ();
  31   test2();
  32   /* Depending on linker choice, this one may bind locally
  33      or to the other unit.  */
  34   if (!testcount && !test2count)
  35     abort();
  36   tt();
  37
  38   if ((testcount != 1 || test2count != 3)
  39       && (testcount != 3 || test2count != 1))
  40     abort ();
  41   return 0;
  42 }