forked from OSchip/llvm-project
64 lines
2.6 KiB
C++
64 lines
2.6 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fcoroutines-ts -std=c++14 -O0 -emit-llvm %s -o - -disable-llvm-passes | FileCheck %s
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// RUN: %clang -fcoroutines-ts -std=c++14 -O0 -emit-llvm -c %s -o %t -Xclang -disable-llvm-passes && %clang -c %t
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#include "Inputs/coroutine.h"
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namespace coro = std::experimental::coroutines_v1;
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struct detached_task {
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struct promise_type {
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detached_task get_return_object() noexcept {
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return detached_task{coro::coroutine_handle<promise_type>::from_promise(*this)};
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}
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void return_void() noexcept {}
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struct final_awaiter {
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bool await_ready() noexcept { return false; }
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coro::coroutine_handle<> await_suspend(coro::coroutine_handle<promise_type> h) noexcept {
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h.destroy();
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return {};
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}
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void await_resume() noexcept {}
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};
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void unhandled_exception() noexcept {}
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final_awaiter final_suspend() noexcept { return {}; }
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coro::suspend_always initial_suspend() noexcept { return {}; }
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};
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~detached_task() {
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if (coro_) {
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coro_.destroy();
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coro_ = {};
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}
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}
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void start() && {
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auto tmp = coro_;
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coro_ = {};
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tmp.resume();
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}
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coro::coroutine_handle<promise_type> coro_;
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};
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detached_task foo() {
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co_return;
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}
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// check that the lifetime of the coroutine handle used to obtain the address is contained within single basic block, and hence does not live across suspension points.
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// CHECK-LABEL: final.suspend:
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// CHECK: %{{.+}} = call token @llvm.coro.save(i8* null)
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// CHECK: %[[HDL_CAST1:.+]] = bitcast %"struct.std::experimental::coroutines_v1::coroutine_handle.0"* %[[HDL:.+]] to i8*
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// CHECK: call void @llvm.lifetime.start.p0i8(i64 8, i8* %[[HDL_CAST1]])
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// CHECK: %[[CALL:.+]] = call i8* @_ZN13detached_task12promise_type13final_awaiter13await_suspendENSt12experimental13coroutines_v116coroutine_handleIS0_EE(
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// CHECK: %[[HDL_CAST2:.+]] = getelementptr inbounds %"struct.std::experimental::coroutines_v1::coroutine_handle.0", %"struct.std::experimental::coroutines_v1::coroutine_handle.0"* %[[HDL]], i32 0, i32 0
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// CHECK: store i8* %[[CALL]], i8** %[[HDL_CAST2]], align 8
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// CHECK: %[[HDL_TRANSFER:.+]] = call i8* @_ZNKSt12experimental13coroutines_v116coroutine_handleIvE7addressEv(%"struct.std::experimental::coroutines_v1::coroutine_handle.0"* nonnull align 8 dereferenceable(8) %[[HDL]])
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// CHECK: %[[HDL_CAST3:.+]] = bitcast %"struct.std::experimental::coroutines_v1::coroutine_handle.0"* %[[HDL]] to i8*
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// CHECK: call void @llvm.lifetime.end.p0i8(i64 8, i8* %[[HDL_CAST3]])
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// CHECK: call void @llvm.coro.resume(i8* %[[HDL_TRANSFER]])
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