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      1 // RUN: %clang_cc1 -triple x86_64-pc-linux  -fsyntax-only -verify -emit-llvm-only %s
      2 
      3 void f1(void) __attribute__((alias("g1")));
      4 void g1(void) {
      5 }
      6 
      7 void f2(void) __attribute__((alias("g2"))); // expected-error {{alias must point to a defined variable or function}}
      8 
      9 
     10 void f3(void) __attribute__((alias("g3"))); // expected-error {{alias must point to a defined variable or function}}
     11 void g3(void);
     12 
     13 
     14 void f4() __attribute__((alias("g4")));
     15 void g4() {}
     16 void h4() __attribute__((alias("f4")));
     17 
     18 void f5() __attribute__((alias("g5")));
     19 void h5() __attribute__((alias("f5")));
     20 void g5() {}
     21 
     22 void g6() {}
     23 void f6() __attribute__((alias("g6")));
     24 void h6() __attribute__((alias("f6")));
     25 
     26 void g7() {}
     27 void h7() __attribute__((alias("f7")));
     28 void f7() __attribute__((alias("g7")));
     29 
     30 void h8() __attribute__((alias("f8")));
     31 void g8() {}
     32 void f8() __attribute__((alias("g8")));
     33 
     34 void h9() __attribute__((alias("f9")));
     35 void f9() __attribute__((alias("g9")));
     36 void g9() {}
     37 
     38 void f10() __attribute__((alias("g10"))); // expected-error {{alias definition is part of a cycle}}
     39 void g10() __attribute__((alias("f10"))); // expected-error {{alias definition is part of a cycle}}
     40 
     41 // FIXME: This could be a bit better, h10 is not part of the cycle, it points
     42 // to it.
     43 void h10() __attribute__((alias("g10"))); // expected-error {{alias definition is part of a cycle}}
     44 
     45 extern int a1 __attribute__((alias("b1")));
     46 int b1 = 42;
     47 
     48 extern int a2 __attribute__((alias("b2"))); // expected-error {{alias must point to a defined variable or function}}
     49 
     50 extern int a3 __attribute__((alias("b3"))); // expected-error {{alias must point to a defined variable or function}}
     51 extern int b3;
     52 
     53 extern int a4 __attribute__((alias("b4"))); // expected-error {{alias must point to a defined variable or function}}
     54 typedef int b4;
     55 
     56 void test2_bar() {}
     57 void test2_foo() __attribute__((weak, alias("test2_bar")));
     58 void test2_zed() __attribute__((alias("test2_foo"))); // expected-warning {{alias will always resolve to test2_bar even if weak definition of test2_foo is overridden}}
     59 
     60 void test3_bar() { }
     61 void test3_foo() __attribute__((section("test"))); // expected-warning {{alias will not be in section 'test' but in the same section as the aliasee}}
     62 void test3_foo() __attribute__((alias("test3_bar")));
     63 
     64 __attribute__((section("test"))) void test4_bar() { }
     65 void test4_foo() __attribute__((section("test")));
     66 void test4_foo() __attribute__((alias("test4_bar")));
     67 
     68 int test5_bar = 0;
     69 extern struct incomplete_type test5_foo __attribute__((alias("test5_bar")));
     70