text: // RUN: %clang_cc1 -triple x86_64-windows -fsyntax-only -verify %s
  // RUN: %clang_cc1 -triple x86_64-linux -fsyntax-only -verify -emit-llvm-only -DCHECK_ALIASES %s
  // RUN: %clang_cc1 -triple x86_64-linux -fsyntax-only -verify -emit-llvm-only %s
  
  #if defined(_WIN32)
  void foo() {}
  void bar() __attribute__((ifunc("foo")));
  //expected-warning@-1 {{'ifunc' attribute ignored}}
  
  #else
  #if defined(CHECK_ALIASES)
  void* f1_ifunc();
  void f1() __attribute__((ifunc("f1_ifunc")));
  //expected-error@-1 {{ifunc must point to a defined function}}
  
  void* f2_a() __attribute__((ifunc("f2_b")));
  //expected-error@-1 {{ifunc definition is part of a cycle}}
  void* f2_b() __attribute__((ifunc("f2_a")));
  //expected-error@-1 {{ifunc definition is part of a cycle}}
  
  void* f3_a() __attribute__((ifunc("f3_b")));
  //expected-warning@-1 {{ifunc will always resolve to f3_c even if weak definition of f3_b is overridden}}
  void* f3_b() __attribute__((weak, alias("f3_c")));
  void* f3_c() { return 0; }
  
  void f4_ifunc() {}
  void f4() __attribute__((ifunc("f4_ifunc")));
  //expected-error@-1 {{ifunc resolver function must return a pointer}}
  
  void* f5_ifunc(int i) { return 0; }
  void f5() __attribute__((ifunc("f5_ifunc")));
  //expected-error@-1 {{ifunc resolver function must have no parameters}}
  
  #else
  void f1a() __asm("f1");
  void f1a() {}
  //expected-note@-1 {{previous definition is here}}
  void f1() __attribute__((ifunc("f1_ifunc")));
  //expected-error@-1 {{definition with same mangled name as another definition}}
  void* f1_ifunc() { return 0; }
  
  #endif
  #endif
  