clang/test/CIR/CodeGen/func-identity-attr.cpp

// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o %t.cir
// RUN: FileCheck %s --input-file=%t.cir
// RUN: FileCheck %s --input-file=%t.cir --check-prefix=TAG

namespace std {
inline namespace __1 {
int *find(int *first, int *last, int value);
}
struct container {
  int *find(int value);
};
struct traits {
  static int *find(int *first);
};
}

namespace other {
int *find(int *first, int *last, int value);
}

int *std_call(int *first, int *last) { return std::find(first, last, 42); }
// The free std find carries its tag, with inline namespaces looked
// through.
// CHECK: cir.func{{.*}} @_ZNSt3__14find{{.*}} func_info<#cir.func_identity<"std::find">>

struct S {
  void operator()();
};

void other_calls(S &s, std::container &c, int *first, int *last) {
  c.find(1);
  std::traits::find(first);
  other::find(first, last, 42);
  s();
}
// Members, static members, operators, and functions outside std match no
// entity, so the free std find above stays the only tagged function.
// TAG-COUNT-1: #cir.func_identity
// TAG-NOT: #cir.func_identity