File: linkage-spec.cpp

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// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o - 2>&1 | FileCheck %s

extern "C" void TopLevelC(){}
// CHECK: cir.func{{.*}} @TopLevelC() {
extern "C++" void TopLevelCpp(){}
// CHECK: cir.func{{.*}} @_Z11TopLevelCppv() {

extern "C++" {
  void ExternCppEmpty(){}
  // CHECK: cir.func{{.*}} @_Z14ExternCppEmptyv() {
  extern "C" void ExternCpp_C(){}
  // CHECK: cir.func{{.*}} @ExternCpp_C() {
  extern "C++" void ExternCpp_Cpp(){}
  // CHECK: cir.func{{.*}} @_Z13ExternCpp_Cppv() {

  extern "C" {
  void ExternCpp_CEmpty(){}
  // CHECK: cir.func{{.*}} @ExternCpp_CEmpty() {
  extern "C" void ExternCpp_C_C(){}
  // CHECK: cir.func{{.*}} @ExternCpp_C_C() {
  extern "C++" void ExternCpp_C_Cpp(){}
  // CHECK: cir.func{{.*}} @_Z15ExternCpp_C_Cppv() {
  }
}

extern "C" {
  void ExternCEmpty(){}
  // CHECK: cir.func{{.*}} @ExternCEmpty() {
  extern "C" void ExternC_C(){}
  // CHECK: cir.func{{.*}} @ExternC_C() {
  extern "C++" void ExternC_Cpp(){}
  // CHECK: cir.func{{.*}} @_Z11ExternC_Cppv() {
  extern "C++" {
  void ExternC_CppEmpty(){}
  // CHECK: cir.func{{.*}} @_Z16ExternC_CppEmptyv() {
  extern "C" void ExternC_Cpp_C(){}
  // CHECK: cir.func{{.*}} @ExternC_Cpp_C() {
  extern "C++" void ExternC_Cpp_Cpp(){}
  // CHECK: cir.func{{.*}} @_Z15ExternC_Cpp_Cppv() {
  }
}