forked from OSchip/llvm-project
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fcoroutines-ts -std=c++14 -O1 -emit-llvm %s -o - -disable-llvm-passes | FileCheck %s
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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: %[[PTR1:.+]] = bitcast %"struct.std::experimental::coroutines_v1::coroutine_handle.0"* %[[ADDR_TMP:.+]] to i8*
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// CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 8, i8* %[[PTR1]])
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// CHECK: call i8* @{{.*address.*}}(%"struct.std::experimental::coroutines_v1::coroutine_handle.0"* %[[ADDR_TMP]])
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// CHECK-NEXT: %[[PTR2:.+]] = bitcast %"struct.std::experimental::coroutines_v1::coroutine_handle.0"* %[[ADDR_TMP]] to i8*
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// CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 8, i8* %[[PTR2]])
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