coroutine.cpp
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// fixme: the following line is added to cleanup bots, will be removed in weeks.
// RUN: rm -f %S/coroutine.ll
// RUN: %clang_cc1 -mllvm -emptyline-comment-coverage=false -triple x86_64-unknown-linux-gnu -fcoroutines-ts -std=c++14 -emit-llvm -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping %s -o - | FileCheck %s
namespace std::experimental {
template <typename... T>
struct coroutine_traits;
template <class Promise = void>
struct coroutine_handle {
coroutine_handle() = default;
static coroutine_handle from_address(void *) noexcept { return {}; }
};
template <>
struct coroutine_handle<void> {
static coroutine_handle from_address(void *) { return {}; }
coroutine_handle() = default;
template <class PromiseType>
coroutine_handle(coroutine_handle<PromiseType>) noexcept {}
};
} // namespace std::experimental
struct suspend_always {
bool await_ready() noexcept;
void await_suspend(std::experimental::coroutine_handle<>) noexcept;
void await_resume() noexcept;
};
template <>
struct std::experimental::coroutine_traits<int, int> {
struct promise_type {
int get_return_object();
suspend_always initial_suspend();
suspend_always final_suspend() noexcept;
void return_value(int);
};
};
// CHECK-LABEL: _Z2f1i:
int f1(int x) { // CHECK-NEXT: File 0, [[@LINE]]:15 -> [[@LINE+7]]:2 = #0
if (x > 42) { // CHECK-NEXT: File 0, [[@LINE]]:7 -> [[@LINE]]:13 = #0
++x; // CHECK-NEXT: Gap,File 0, [[@LINE-1]]:14 -> [[@LINE-1]]:15 = #1
} else { // CHECK-NEXT: File 0, [[@LINE-2]]:15 -> [[@LINE]]:4 = #1
co_return x + 42; // CHECK-NEXT: Gap,File 0, [[@LINE-1]]:4 -> [[@LINE-1]]:10 = (#0 - #1)
} // CHECK-NEXT: File 0, [[@LINE-2]]:10 -> [[@LINE]]:4 = (#0 - #1)
co_return x; // CHECK-NEXT: Gap,File 0, [[@LINE-1]]:4 -> [[@LINE]]:3 = #1
} // CHECK-NEXT: File 0, [[@LINE-1]]:3 -> [[@LINE]]:2 = #1