clang/test/CodeGenCoroutines/microsoft-abi-operator-coawait.cpp

   1 // RUN: %clang_cc1 -triple x86_64-pc-windows-msvc18.0.0 -emit-llvm %s -o - -std=c++20 -disable-llvm-passes | FileCheck %s
   2 struct no_suspend {
   3   bool await_ready() { return true; }
   4   template <typename F> void await_suspend(F) {}
   5   void await_resume() {}
   6 };
   7
   8 struct A {
   9   no_suspend operator co_await() { return {}; }
  10 };
  11
  12 struct B {};
  13
  14 no_suspend operator co_await(B const&) { return {}; }
  15
  16 // CHECK-LABEL: f(
  17 extern "C" void f() {
  18   A a;
  19   B b;
  20   // CHECK: call void @"??__LA@@QEAA?AUno_suspend@@XZ"(
  21   a.operator co_await();
  22   // CHECK-NEXT: call i8 @"??__L@YA?AUno_suspend@@AEBUB@@@Z"(
  23   operator co_await(b);
  24 }
  25