| 1 | // Verifies that parameters are copied with move constructors |
| 2 | // Verifies that parameter copies are destroyed |
| 3 | // Vefifies that parameter copies are used in the body of the coroutine |
| 4 | // Verifies that parameter copies are used to construct the promise type, if that type has a matching constructor |
| 5 | // RUN: %clang_cc1 -std=c++1z -fcoroutines-ts -triple=x86_64-unknown-linux-gnu -emit-llvm -o - %s -disable-llvm-passes -fexceptions | FileCheck %s |
| 6 | |
| 7 | namespace std::experimental { |
| 8 | template <typename... T> struct coroutine_traits; |
| 9 | |
| 10 | template <class Promise = void> struct coroutine_handle { |
| 11 | coroutine_handle() = default; |
| 12 | static coroutine_handle from_address(void *) noexcept; |
| 13 | }; |
| 14 | template <> struct coroutine_handle<void> { |
| 15 | static coroutine_handle from_address(void *) noexcept; |
| 16 | coroutine_handle() = default; |
| 17 | template <class PromiseType> |
| 18 | coroutine_handle(coroutine_handle<PromiseType>) noexcept; |
| 19 | }; |
| 20 | } |
| 21 | |
| 22 | struct suspend_always { |
| 23 | bool await_ready() noexcept; |
| 24 | void await_suspend(std::experimental::coroutine_handle<>) noexcept; |
| 25 | void await_resume() noexcept; |
| 26 | }; |
| 27 | |
| 28 | template <typename... Args> struct std::experimental::coroutine_traits<void, Args...> { |
| 29 | struct promise_type { |
| 30 | void get_return_object() noexcept; |
| 31 | suspend_always initial_suspend() noexcept; |
| 32 | suspend_always final_suspend() noexcept; |
| 33 | void return_void() noexcept; |
| 34 | promise_type(); |
| 35 | ~promise_type() noexcept; |
| 36 | void unhandled_exception() noexcept; |
| 37 | }; |
| 38 | }; |
| 39 | |
| 40 | // TODO: Not supported yet |
| 41 | struct CopyOnly { |
| 42 | int val; |
| 43 | CopyOnly(const CopyOnly&) noexcept; |
| 44 | CopyOnly(CopyOnly&&) = delete; |
| 45 | ~CopyOnly(); |
| 46 | }; |
| 47 | |
| 48 | struct MoveOnly { |
| 49 | int val; |
| 50 | MoveOnly(const MoveOnly&) = delete; |
| 51 | MoveOnly(MoveOnly&&) noexcept; |
| 52 | ~MoveOnly(); |
| 53 | }; |
| 54 | |
| 55 | struct MoveAndCopy { |
| 56 | int val; |
| 57 | MoveAndCopy(const MoveAndCopy&)noexcept; |
| 58 | MoveAndCopy(MoveAndCopy&&) noexcept; |
| 59 | ~MoveAndCopy(); |
| 60 | }; |
| 61 | |
| 62 | void consume(int,int,int) noexcept; |
| 63 | |
| 64 | // TODO: Add support for CopyOnly params |
| 65 | // CHECK: define void @_Z1fi8MoveOnly11MoveAndCopy(i32 %val, %struct.MoveOnly* %[[MoParam:.+]], %struct.MoveAndCopy* %[[McParam:.+]]) #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8* |
| 66 | void f(int val, MoveOnly moParam, MoveAndCopy mcParam) { |
| 67 | // CHECK: %[[MoCopy:.+]] = alloca %struct.MoveOnly |
| 68 | // CHECK: %[[McCopy:.+]] = alloca %struct.MoveAndCopy |
| 69 | // CHECK: store i32 %val, i32* %[[ValAddr:.+]] |
| 70 | |
| 71 | // CHECK: call i8* @llvm.coro.begin( |
| 72 | // CHECK: call void @_ZN8MoveOnlyC1EOS_(%struct.MoveOnly* %[[MoCopy]], %struct.MoveOnly* dereferenceable(4) %[[MoParam]]) |
| 73 | // CHECK-NEXT: call void @_ZN11MoveAndCopyC1EOS_(%struct.MoveAndCopy* %[[McCopy]], %struct.MoveAndCopy* dereferenceable(4) %[[McParam]]) # |
| 74 | // CHECK-NEXT: invoke void @_ZNSt12experimental16coroutine_traitsIJvi8MoveOnly11MoveAndCopyEE12promise_typeC1Ev( |
| 75 | |
| 76 | // CHECK: call void @_ZN14suspend_always12await_resumeEv( |
| 77 | // CHECK: %[[IntParam:.+]] = load i32, i32* %val1 |
| 78 | // CHECK: %[[MoGep:.+]] = getelementptr inbounds %struct.MoveOnly, %struct.MoveOnly* %[[MoCopy]], i32 0, i32 0 |
| 79 | // CHECK: %[[MoVal:.+]] = load i32, i32* %[[MoGep]] |
| 80 | // CHECK: %[[McGep:.+]] = getelementptr inbounds %struct.MoveAndCopy, %struct.MoveAndCopy* %[[McCopy]], i32 0, i32 0 |
| 81 | // CHECK: %[[McVal:.+]] = load i32, i32* %[[McGep]] |
| 82 | // CHECK: call void @_Z7consumeiii(i32 %[[IntParam]], i32 %[[MoVal]], i32 %[[McVal]]) |
| 83 | |
| 84 | consume(val, moParam.val, mcParam.val); |
| 85 | co_return; |
| 86 | |
| 87 | // Skip to final suspend: |
| 88 | // CHECK: call void @_ZNSt12experimental16coroutine_traitsIJvi8MoveOnly11MoveAndCopyEE12promise_type13final_suspendEv( |
| 89 | // CHECK: call void @_ZN14suspend_always12await_resumeEv( |
| 90 | |
| 91 | // Destroy promise, then parameter copies: |
| 92 | // CHECK: call void @_ZNSt12experimental16coroutine_traitsIJvi8MoveOnly11MoveAndCopyEE12promise_typeD1Ev(%"struct.std::experimental::coroutine_traits<void, int, MoveOnly, MoveAndCopy>::promise_type"* %__promise) #2 |
| 93 | // CHECK-NEXT: call void @_ZN11MoveAndCopyD1Ev(%struct.MoveAndCopy* %[[McCopy]]) |
| 94 | // CHECK-NEXT: call void @_ZN8MoveOnlyD1Ev(%struct.MoveOnly* %[[MoCopy]] |
| 95 | // CHECK-NEXT: call i8* @llvm.coro.free( |
| 96 | } |
| 97 | |
| 98 | // CHECK-LABEL: void @_Z16dependent_paramsI1A1BEvT_T0_S3_(%struct.A* %x, %struct.B*, %struct.B* %y) |
| 99 | template <typename T, typename U> |
| 100 | void dependent_params(T x, U, U y) { |
| 101 | // CHECK: %[[x_copy:.+]] = alloca %struct.A |
| 102 | // CHECK-NEXT: %[[unnamed_copy:.+]] = alloca %struct.B |
| 103 | // CHECK-NEXT: %[[y_copy:.+]] = alloca %struct.B |
| 104 | |
| 105 | // CHECK: call i8* @llvm.coro.begin |
| 106 | // CHECK-NEXT: call void @_ZN1AC1EOS_(%struct.A* %[[x_copy]], %struct.A* dereferenceable(512) %x) |
| 107 | // CHECK-NEXT: call void @_ZN1BC1EOS_(%struct.B* %[[unnamed_copy]], %struct.B* dereferenceable(512) %0) |
| 108 | // CHECK-NEXT: call void @_ZN1BC1EOS_(%struct.B* %[[y_copy]], %struct.B* dereferenceable(512) %y) |
| 109 | // CHECK-NEXT: invoke void @_ZNSt12experimental16coroutine_traitsIJv1A1BS2_EE12promise_typeC1Ev( |
| 110 | |
| 111 | co_return; |
| 112 | } |
| 113 | |
| 114 | struct A { |
| 115 | int WontFitIntoRegisterForSure[128]; |
| 116 | A(); |
| 117 | A(A&&) noexcept; |
| 118 | ~A(); |
| 119 | }; |
| 120 | |
| 121 | struct B { |
| 122 | int WontFitIntoRegisterForSure[128]; |
| 123 | B(); |
| 124 | B(B&&) noexcept; |
| 125 | ~B(); |
| 126 | }; |
| 127 | |
| 128 | void call_dependent_params() { |
| 129 | dependent_params(A{}, B{}, B{}); |
| 130 | } |
| 131 | |
| 132 | // Test that, when the promise type has a constructor whose signature matches |
| 133 | // that of the coroutine function, that constructor is used. This is an |
| 134 | // experimental feature that will be proposed for the Coroutines TS. |
| 135 | |
| 136 | struct promise_matching_constructor {}; |
| 137 | |
| 138 | template<> |
| 139 | struct std::experimental::coroutine_traits<void, promise_matching_constructor, int, float, double> { |
| 140 | struct promise_type { |
| 141 | promise_type(promise_matching_constructor, int, float, double) {} |
| 142 | promise_type() = delete; |
| 143 | void get_return_object() {} |
| 144 | suspend_always initial_suspend() { return {}; } |
| 145 | suspend_always final_suspend() { return {}; } |
| 146 | void return_void() {} |
| 147 | void unhandled_exception() {} |
| 148 | }; |
| 149 | }; |
| 150 | |
| 151 | // CHECK-LABEL: void @_Z38coroutine_matching_promise_constructor28promise_matching_constructorifd(i32, float, double) |
| 152 | void coroutine_matching_promise_constructor(promise_matching_constructor, int, float, double) { |
| 153 | // CHECK: %[[INT:.+]] = load i32, i32* %5, align 4 |
| 154 | // CHECK: %[[FLOAT:.+]] = load float, float* %6, align 4 |
| 155 | // CHECK: %[[DOUBLE:.+]] = load double, double* %7, align 8 |
| 156 | // CHECK: invoke void @_ZNSt12experimental16coroutine_traitsIJv28promise_matching_constructorifdEE12promise_typeC1ES1_ifd(%"struct.std::experimental::coroutine_traits<void, promise_matching_constructor, int, float, double>::promise_type"* %__promise, i32 %[[INT]], float %[[FLOAT]], double %[[DOUBLE]]) |
| 157 | co_return; |
| 158 | } |
| 159 | |
| 160 | struct some_class; |
| 161 | |
| 162 | struct method {}; |
| 163 | |
| 164 | template <typename... Args> struct std::experimental::coroutine_traits<method, Args...> { |
| 165 | struct promise_type { |
| 166 | promise_type(some_class&, float); |
| 167 | method get_return_object(); |
| 168 | suspend_always initial_suspend(); |
| 169 | suspend_always final_suspend(); |
| 170 | void return_void(); |
| 171 | void unhandled_exception(); |
| 172 | }; |
| 173 | }; |
| 174 | |
| 175 | struct some_class { |
| 176 | method good_coroutine_calls_custom_constructor(float); |
| 177 | }; |
| 178 | |
| 179 | // CHECK-LABEL: define void @_ZN10some_class39good_coroutine_calls_custom_constructorEf(%struct.some_class* |
| 180 | method some_class::good_coroutine_calls_custom_constructor(float) { |
| 181 | // CHECK: invoke void @_ZNSt12experimental16coroutine_traitsIJ6methodR10some_classfEE12promise_typeC1ES3_f(%"struct.std::experimental::coroutine_traits<method, some_class &, float>::promise_type"* %__promise, %struct.some_class* dereferenceable(1) %{{.+}}, float |
| 182 | co_return; |
| 183 | } |
| 184 | |