1 // RUN: %clang_cc1 -std=c++20 -triple=x86_64-pc-windows-msvc18.0.0 -emit-llvm %s -o - -fexceptions -fcxx-exceptions -disable-llvm-passes | FileCheck %s
2 // RUN: %clang_cc1 -std=c++20 -triple=x86_64-unknown-linux-gnu -emit-llvm -o - %s -fexceptions -fcxx-exceptions -disable-llvm-passes | FileCheck --check-prefix=CHECK-LPAD %s
3
4 namespace std {
5 template <typename R, typename... T> struct coroutine_traits {
6 using promise_type = typename R::promise_type;
7 };
8
9 template <class Promise = void> struct coroutine_handle;
10
11 template <> struct coroutine_handle<void> {
12 static coroutine_handle from_address(void *) noexcept;
13 coroutine_handle() = default;
14 template <class PromiseType>
15 coroutine_handle(coroutine_handle<PromiseType>) noexcept;
16 };
17 template <class Promise> struct coroutine_handle: coroutine_handle<void> {
18 coroutine_handle() = default;
19 static coroutine_handle from_address(void *) noexcept;
20 };
21 } // namespace std
22
23 struct suspend_always {
24 bool await_ready() noexcept;
25 void await_suspend(std::coroutine_handle<>) noexcept;
26 void await_resume() noexcept;
27 };
28
29 struct coro_t {
30 struct promise_type {
31 coro_t get_return_object() noexcept;
32 suspend_always initial_suspend() noexcept;
33 suspend_always final_suspend() noexcept;
34 void return_void() noexcept;
35 void unhandled_exception() noexcept;
36 };
37 };
38
39 struct Cleanup { ~Cleanup(); };
40 void may_throw();
41
f()42 coro_t f() {
43 Cleanup x;
44 may_throw();
45 co_return;
46 }
47
48 // CHECK: @"?f@@YA?AUcoro_t@@XZ"(
49 // CHECK: invoke void @"?may_throw@@YAXXZ"()
50 // CHECK: to label %[[CONT:.+]] unwind label %[[EHCLEANUP:.+]]
51 // CHECK: [[EHCLEANUP]]:
52 // CHECK: %[[INNERPAD:.+]] = cleanuppad within none []
53 // CHECK: call void @"??1Cleanup@@QEAA@XZ"(
54 // CHECK: cleanupret from %{{.+}} unwind label %[[CATCHDISPATCH:.+]]
55
56 // CHECK: [[CATCHDISPATCH]]:
57 // CHECK: catchswitch within none [label %[[CATCHPAD:.+]]] unwind label %[[COROENDBB:.+]]
58 // CHECK: [[CATCHPAD]]:
59 // CHECK: call void @"?unhandled_exception@promise_type@coro_t@@QEAAXXZ"
60
61 // CHECK: [[COROENDBB]]:
62 // CHECK-NEXT: %[[CLPAD:.+]] = cleanuppad within none
63 // CHECK-NEXT: call i1 @llvm.coro.end(ptr null, i1 true, token none) [ "funclet"(token %[[CLPAD]]) ]
64 // CHECK-NEXT: cleanupret from %[[CLPAD]] unwind label
65
66 // CHECK-LPAD: @_Z1fv(
67 // CHECK-LPAD: invoke void @_Z9may_throwv()
68 // CHECK-LPAD: to label %[[CONT:.+]] unwind label %[[EHCLEANUP:.+]]
69 // CHECK-LPAD: [[EHCLEANUP]]:
70 // CHECK-LPAD: landingpad { ptr, i32 }
71 // CHECK-LPAD: catch
72 // CHECK-LPAD: call void @_ZN7CleanupD1Ev(
73 // CHECK-LPAD: call ptr @__cxa_begin_catch
74 // CHECK-LPAD: call void @_ZN6coro_t12promise_type19unhandled_exceptionEv
75 // CHECK-LPAD: invoke void @__cxa_end_catch()
76 // CHECK-LPAD: to label %{{.+}} unwind label %[[UNWINDBB:.+]]
77
78 // CHECK-LPAD: [[UNWINDBB]]:
79 // CHECK-LPAD: %[[I1RESUME:.+]] = call i1 @llvm.coro.end(ptr null, i1 true, token none)
80 // CHECK-LPAD: br i1 %[[I1RESUME]], label %[[EHRESUME:.+]], label
81 // CHECK-LPAD: [[EHRESUME]]:
82 // CHECK-LPAD-NEXT: %[[exn:.+]] = load ptr, ptr %exn.slot, align 8
83 // CHECK-LPAD-NEXT: %[[sel:.+]] = load i32, ptr %ehselector.slot, align 4
84 // CHECK-LPAD-NEXT: %[[val1:.+]] = insertvalue { ptr, i32 } poison, ptr %[[exn]], 0
85 // CHECK-LPAD-NEXT: %[[val2:.+]] = insertvalue { ptr, i32 } %[[val1]], i32 %[[sel]], 1
86 // CHECK-LPAD-NEXT: resume { ptr, i32 } %[[val2]]
87