clang/test/Sema/attr-alias-elf.c

   1 // RUN: %clang_cc1 -triple x86_64-pc-linux -Wno-strict-prototypes -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")));