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

   1 // RUN: %clang_cc1 -triple x86_64-pc-linux -Wno-strict-prototypes -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 // expected-note@-1 {{must refer to its mangled name}}
   9
  10 void f3(void) __attribute__((alias("g3"))); // expected-error {{alias must point to a defined variable or function}}
  11 // expected-note@-1 {{must refer to its mangled name}}
  12 void g3(void);
  13
  14
  15 void f4() __attribute__((alias("g4")));
  16 void g4() {}
  17 void h4() __attribute__((alias("f4")));
  18
  19 void f5() __attribute__((alias("g5")));
  20 void h5() __attribute__((alias("f5")));
  21 void g5() {}
  22
  23 void g6() {}
  24 void f6() __attribute__((alias("g6")));
  25 void h6() __attribute__((alias("f6")));
  26
  27 void g7() {}
  28 void h7() __attribute__((alias("f7")));
  29 void f7() __attribute__((alias("g7")));
  30
  31 void h8() __attribute__((alias("f8")));
  32 void g8() {}
  33 void f8() __attribute__((alias("g8")));
  34
  35 void h9() __attribute__((alias("f9")));
  36 void f9() __attribute__((alias("g9")));
  37 void g9() {}
  38
  39 void f10() __attribute__((alias("g10"))); // expected-error {{alias definition is part of a cycle}}
  40 void g10() __attribute__((alias("f10"))); // expected-error {{alias definition is part of a cycle}}
  41
  42 // FIXME: This could be a bit better, h10 is not part of the cycle, it points
  43 // to it.
  44 void h10() __attribute__((alias("g10"))); // expected-error {{alias definition is part of a cycle}}
  45
  46 extern int a1 __attribute__((alias("b1")));
  47 int b1 = 42;
  48
  49 extern int a2 __attribute__((alias("b2"))); // expected-error {{alias must point to a defined variable or function}}
  50 // expected-note@-1 {{must refer to its mangled name}}
  51
  52 extern int a3 __attribute__((alias("b3"))); // expected-error {{alias must point to a defined variable or function}}
  53 // expected-note@-1 {{must refer to its mangled name}}
  54 extern int b3;
  55
  56 extern int a4 __attribute__((alias("b4"))); // expected-error {{alias must point to a defined variable or function}}
  57 // expected-note@-1 {{must refer to its mangled name}}
  58 typedef int b4;
  59
  60 void test2_bar() {}
  61 void test2_foo() __attribute__((weak, alias("test2_bar")));
  62 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}}
  63
  64 void test3_bar() { }
  65 void test3_foo() __attribute__((section("test"))); // expected-warning {{alias will not be in section 'test' but in the same section as the aliasee}}
  66 void test3_foo() __attribute__((alias("test3_bar")));
  67
  68 __attribute__((section("test"))) void test4_bar() { }
  69 void test4_foo() __attribute__((section("test")));
  70 void test4_foo() __attribute__((alias("test4_bar")));
  71
  72 int test5_bar = 0;
  73 extern struct incomplete_type test5_foo __attribute__((alias("test5_bar")));