clang/test/CodeGenCoroutines/coro-dwarf-O2.cpp

   1 // Check that we can still observe the value of the coroutine frame
   2 // with optimizations.
   3 //
   4 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++20 \
   5 // RUN:   -emit-llvm %s -debug-info-kind=limited -dwarf-version=5 \
   6 // RUN:   -O2 -o - | FileCheck %s
   7
   8 #include "Inputs/coroutine.h"
   9
  10 template <>
  11 struct std::coroutine_traits<void> {
  12   struct promise_type {
  13     void get_return_object();
  14     std::suspend_always initial_suspend();
  15     std::suspend_always final_suspend() noexcept;
  16     void return_void();
  17     void unhandled_exception();
  18   };
  19 };
  20
  21 struct ScalarAwaiter {
  22   template <typename F> void await_suspend(F);
  23   bool await_ready();
  24   int await_resume();
  25 };
  26
  27 extern "C" void UseScalar(int);
  28
  29 extern "C" void f() {
  30   UseScalar(co_await ScalarAwaiter{});
  31
  32   int Val = co_await ScalarAwaiter{};
  33
  34   co_await ScalarAwaiter{};
  35 }
  36
  37 // CHECK: define {{.*}}@f.resume({{.*}} %[[ARG:.*]])
  38 // CHECK:  #dbg_value(ptr %[[ARG]], ![[CORO_NUM:[0-9]+]], !DIExpression(DW_OP_deref)
  39 // CHECK: ![[CORO_NUM]] = !DILocalVariable(name: "__coro_frame"