forked from OSchip/llvm-project
204 lines
8.7 KiB
C++
204 lines
8.7 KiB
C++
// Verifies that parameters are copied with move constructors
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// Verifies that parameter copies are destroyed
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// Vefifies that parameter copies are used in the body of the coroutine
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// Verifies that parameter copies are used to construct the promise type, if that type has a matching constructor
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// RUN: %clang_cc1 -std=c++20 -triple=x86_64-unknown-linux-gnu -emit-llvm -o - %s -disable-llvm-passes -fexceptions | FileCheck %s
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namespace std {
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template <typename... T> struct coroutine_traits;
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template <class Promise = void> struct coroutine_handle {
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coroutine_handle() = default;
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static coroutine_handle from_address(void *) noexcept;
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};
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template <> struct coroutine_handle<void> {
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static coroutine_handle from_address(void *) noexcept;
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coroutine_handle() = default;
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template <class PromiseType>
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coroutine_handle(coroutine_handle<PromiseType>) noexcept;
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};
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} // namespace std
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struct suspend_always {
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bool await_ready() noexcept;
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void await_suspend(std::coroutine_handle<>) noexcept;
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void await_resume() noexcept;
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};
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template <typename... Args> struct std::coroutine_traits<void, Args...> {
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struct promise_type {
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void get_return_object() noexcept;
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suspend_always initial_suspend() noexcept;
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suspend_always final_suspend() noexcept;
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void return_void() noexcept;
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promise_type();
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~promise_type() noexcept;
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void unhandled_exception() noexcept;
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};
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};
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// TODO: Not supported yet
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struct CopyOnly {
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int val;
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CopyOnly(const CopyOnly&) noexcept;
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CopyOnly(CopyOnly&&) = delete;
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~CopyOnly();
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};
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struct MoveOnly {
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int val;
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MoveOnly(const MoveOnly&) = delete;
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MoveOnly(MoveOnly&&) noexcept;
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~MoveOnly();
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};
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struct MoveAndCopy {
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int val;
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MoveAndCopy(const MoveAndCopy&)noexcept;
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MoveAndCopy(MoveAndCopy&&) noexcept;
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~MoveAndCopy();
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};
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void consume(int,int,int) noexcept;
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// TODO: Add support for CopyOnly params
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// CHECK: define{{.*}} void @_Z1fi8MoveOnly11MoveAndCopy(i32 noundef %val, %struct.MoveOnly* noundef %[[MoParam:.+]], %struct.MoveAndCopy* noundef %[[McParam:.+]]) #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*
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void f(int val, MoveOnly moParam, MoveAndCopy mcParam) {
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// CHECK: %[[MoCopy:.+]] = alloca %struct.MoveOnly
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// CHECK: %[[McCopy:.+]] = alloca %struct.MoveAndCopy
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// CHECK: store i32 %val, i32* %[[ValAddr:.+]]
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// CHECK: call i8* @llvm.coro.begin(
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// CHECK: call void @_ZN8MoveOnlyC1EOS_(%struct.MoveOnly* {{[^,]*}} %[[MoCopy]], %struct.MoveOnly* noundef nonnull align 4 dereferenceable(4) %[[MoParam]])
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// CHECK-NEXT: bitcast %struct.MoveAndCopy* %[[McCopy]] to i8*
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// CHECK-NEXT: call void @llvm.lifetime.start.p0i8(
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// CHECK-NEXT: call void @_ZN11MoveAndCopyC1EOS_(%struct.MoveAndCopy* {{[^,]*}} %[[McCopy]], %struct.MoveAndCopy* noundef nonnull align 4 dereferenceable(4) %[[McParam]]) #
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// CHECK-NEXT: bitcast %"struct.std::coroutine_traits<void, int, MoveOnly, MoveAndCopy>::promise_type"* %__promise to i8*
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// CHECK-NEXT: call void @llvm.lifetime.start.p0i8(
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// CHECK-NEXT: invoke void @_ZNSt16coroutine_traitsIJvi8MoveOnly11MoveAndCopyEE12promise_typeC1Ev(
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// CHECK: call void @_ZN14suspend_always12await_resumeEv(
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// CHECK: %[[IntParam:.+]] = load i32, i32* %{{.*}}
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// CHECK: %[[MoGep:.+]] = getelementptr inbounds %struct.MoveOnly, %struct.MoveOnly* %[[MoCopy]], i32 0, i32 0
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// CHECK: %[[MoVal:.+]] = load i32, i32* %[[MoGep]]
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// CHECK: %[[McGep:.+]] = getelementptr inbounds %struct.MoveAndCopy, %struct.MoveAndCopy* %[[McCopy]], i32 0, i32 0
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// CHECK: %[[McVal:.+]] = load i32, i32* %[[McGep]]
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// CHECK: call void @_Z7consumeiii(i32 noundef %[[IntParam]], i32 noundef %[[MoVal]], i32 noundef %[[McVal]])
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consume(val, moParam.val, mcParam.val);
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co_return;
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// Skip to final suspend:
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// CHECK: call void @_ZNSt16coroutine_traitsIJvi8MoveOnly11MoveAndCopyEE12promise_type13final_suspendEv(
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// CHECK: call void @_ZN14suspend_always12await_resumeEv(
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// Destroy promise, then parameter copies:
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// CHECK: call void @_ZNSt16coroutine_traitsIJvi8MoveOnly11MoveAndCopyEE12promise_typeD1Ev(%"struct.std::coroutine_traits<void, int, MoveOnly, MoveAndCopy>::promise_type"* {{[^,]*}} %__promise)
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// CHECK-NEXT: bitcast %"struct.std::coroutine_traits<void, int, MoveOnly, MoveAndCopy>::promise_type"* %__promise to i8*
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// CHECK-NEXT: call void @llvm.lifetime.end.p0i8(
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// CHECK-NEXT: call void @_ZN11MoveAndCopyD1Ev(%struct.MoveAndCopy* {{[^,]*}} %[[McCopy]])
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// CHECK-NEXT: bitcast %struct.MoveAndCopy* %[[McCopy]] to i8*
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// CHECK-NEXT: call void @llvm.lifetime.end.p0i8(
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// CHECK-NEXT: call void @_ZN8MoveOnlyD1Ev(%struct.MoveOnly* {{[^,]*}} %[[MoCopy]]
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// CHECK-NEXT: bitcast %struct.MoveOnly* %[[MoCopy]] to i8*
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// CHECK-NEXT: call void @llvm.lifetime.end.p0i8(
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// CHECK-NEXT: bitcast i32* %{{.+}} to i8*
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// CHECK-NEXT: call void @llvm.lifetime.end.p0i8(
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// CHECK-NEXT: call i8* @llvm.coro.free(
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}
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// CHECK-LABEL: void @_Z16dependent_paramsI1A1BEvT_T0_S3_(%struct.A* noundef %x, %struct.B* noundef %0, %struct.B* noundef %y)
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template <typename T, typename U>
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void dependent_params(T x, U, U y) {
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// CHECK: %[[x_copy:.+]] = alloca %struct.A
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// CHECK-NEXT: %[[unnamed_copy:.+]] = alloca %struct.B
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// CHECK-NEXT: %[[y_copy:.+]] = alloca %struct.B
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// CHECK: call i8* @llvm.coro.begin
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// CHECK-NEXT: bitcast %struct.A* %[[x_copy]] to i8*
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// CHECK-NEXT: call void @llvm.lifetime.start.p0i8(
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// CHECK-NEXT: call void @_ZN1AC1EOS_(%struct.A* {{[^,]*}} %[[x_copy]], %struct.A* noundef nonnull align 4 dereferenceable(512) %x)
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// CHECK-NEXT: bitcast %struct.B* %[[unnamed_copy]] to i8*
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// CHECK-NEXT: call void @llvm.lifetime.start.p0i8(
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// CHECK-NEXT: call void @_ZN1BC1EOS_(%struct.B* {{[^,]*}} %[[unnamed_copy]], %struct.B* noundef nonnull align 4 dereferenceable(512) %0)
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// CHECK-NEXT: bitcast %struct.B* %[[y_copy]] to i8*
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// CHECK-NEXT: call void @llvm.lifetime.start.p0i8(
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// CHECK-NEXT: call void @_ZN1BC1EOS_(%struct.B* {{[^,]*}} %[[y_copy]], %struct.B* noundef nonnull align 4 dereferenceable(512) %y)
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// CHECK-NEXT: bitcast %"struct.std::coroutine_traits<void, A, B, B>::promise_type"* %__promise to i8*
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// CHECK-NEXT: call void @llvm.lifetime.start.p0i8(
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// CHECK-NEXT: invoke void @_ZNSt16coroutine_traitsIJv1A1BS1_EE12promise_typeC1Ev(
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co_return;
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}
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struct A {
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int WontFitIntoRegisterForSure[128];
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A();
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A(A&&) noexcept;
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~A();
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};
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struct B {
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int WontFitIntoRegisterForSure[128];
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B();
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B(B&&) noexcept;
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~B();
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};
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void call_dependent_params() {
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dependent_params(A{}, B{}, B{});
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}
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// Test that, when the promise type has a constructor whose signature matches
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// that of the coroutine function, that constructor is used. This is an
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// experimental feature that will be proposed for the Coroutines TS.
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struct promise_matching_constructor {};
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template <>
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struct std::coroutine_traits<void, promise_matching_constructor, int, float, double> {
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struct promise_type {
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promise_type(promise_matching_constructor, int, float, double) {}
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promise_type() = delete;
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void get_return_object() {}
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suspend_always initial_suspend() { return {}; }
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suspend_always final_suspend() noexcept { return {}; }
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void return_void() {}
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void unhandled_exception() {}
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};
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};
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// CHECK-LABEL: void @_Z38coroutine_matching_promise_constructor28promise_matching_constructorifd(i32 noundef %0, float noundef %1, double noundef %2)
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void coroutine_matching_promise_constructor(promise_matching_constructor, int, float, double) {
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// CHECK: %[[INT:.+]] = load i32, i32* %5, align 4
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// CHECK: %[[FLOAT:.+]] = load float, float* %6, align 4
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// CHECK: %[[DOUBLE:.+]] = load double, double* %7, align 8
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// CHECK: invoke void @_ZNSt16coroutine_traitsIJv28promise_matching_constructorifdEE12promise_typeC1ES0_ifd(%"struct.std::coroutine_traits<void, promise_matching_constructor, int, float, double>::promise_type"* {{[^,]*}} %__promise, i32 noundef %[[INT]], float noundef %[[FLOAT]], double noundef %[[DOUBLE]])
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co_return;
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}
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struct some_class;
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struct method {};
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template <typename... Args> struct std::coroutine_traits<method, Args...> {
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struct promise_type {
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promise_type(some_class&, float);
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method get_return_object();
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suspend_always initial_suspend();
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suspend_always final_suspend() noexcept;
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void return_void();
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void unhandled_exception();
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};
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};
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struct some_class {
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method good_coroutine_calls_custom_constructor(float);
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};
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// CHECK-LABEL: define{{.*}} void @_ZN10some_class39good_coroutine_calls_custom_constructorEf(%struct.some_class*
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method some_class::good_coroutine_calls_custom_constructor(float) {
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// CHECK: invoke void @_ZNSt16coroutine_traitsIJ6methodR10some_classfEE12promise_typeC1ES2_f(%"struct.std::coroutine_traits<method, some_class &, float>::promise_type"* {{[^,]*}} %__promise, %struct.some_class* noundef nonnull align 1 dereferenceable(1) %{{.+}}, float
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co_return;
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}
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