clang/test/SemaCXX/externc-ifunc-resolver.cpp

   1 // RUN: %clang_cc1 -emit-llvm-only -triple x86_64-linux-gnu -verify %s
   2
   3 extern "C" {
   4 __attribute__((used)) static void *resolve_foo() { return 0; }
   5 namespace NS {
   6 __attribute__((used)) static void *resolve_foo() { return 0; }
   7 } // namespace NS
   8
   9 // FIXME: This diagnostic is pretty confusing, the issue is that the existence
  10 // of the two functions suppresses the 'alias' creation, and thus the ifunc
  11 // resolution via the alias as well. In the future we should probably find
  12 // some way to improve this diagnostic (likely by diagnosing when we decide
  13 // this case suppresses alias creation).
  14 __attribute__((ifunc("resolve_foo"))) void foo(); // expected-error{{ifunc must point to a defined function}}
  15 }
  16