gcc/testsuite/gcc.dg/localalias.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    If this test fails either aliases needs to be disabled on given target on aliases with
   5    proper semantic needs to be implemented.  This is problem with e.g. AIX .set pseudo-op
   6    that implementes alias syntactically (by substituting in assembler) rather as alternative
   7    symbol defined on a target's location.  */
   8
   9 /* { dg-do run }
  10    { dg-options "-Wstrict-aliasing=2 -fstrict-aliasing" }
  11    { dg-require-alias "" }
  12    { dg-additional-sources "localalias-2.c" } */
  13 extern void abort (void);
  14 extern void tt (void);
  15 extern int test2count;
  16 int testcount;
  17 __attribute__ ((weak,noinline))
  18 void test(void)
  19 {
  20   testcount++;
  21 }
  22 __attribute ((alias("test")))
  23 static void test2(void);
  24
  25 int main()
  26 {
  27   test2();
  28   /* This call must bind locally.  */
  29   if (!testcount)
  30     abort ();
  31   test();
  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 }