41 lines · cpp
1// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++20 -emit-llvm %s -o - -disable-llvm-passes | FileCheck %s2 3#include "Inputs/coroutine.h"4 5using namespace std;6 7struct coro {8 struct promise_type {9 coro get_return_object();10 suspend_always initial_suspend();11 suspend_never final_suspend() noexcept;12 void return_void();13 static void unhandled_exception();14 };15};16 17extern "C" coro f(int) { co_return; }18// Verify that cleanup.dest.slot is eliminated in a coroutine.19// CHECK-LABEL: f(20// CHECK: %[[INIT_SUSPEND:.+]] = call i8 @llvm.coro.suspend(21// CHECK-NEXT: switch i8 %[[INIT_SUSPEND]], label22// CHECK-NEXT: i8 0, label %[[INIT_READY:.+]]23// CHECK-NEXT: i8 1, label %[[INIT_CLEANUP:.+]]24// CHECK-NEXT: ]25// CHECK: %[[CLEANUP_DEST0:.+]] = phi i32 [ 0, %[[INIT_READY]] ], [ 2, %[[INIT_CLEANUP]] ]26 27// CHECK: %[[FINAL_SUSPEND:.+]] = call i8 @llvm.coro.suspend(28// CHECK-NEXT: switch i8 %{{.*}}, label %coro.ret [29// CHECK-NEXT: i8 0, label %[[FINAL_READY:.+]]30// CHECK-NEXT: i8 1, label %[[FINAL_CLEANUP:.+]]31// CHECK-NEXT: ]32 33// CHECK: call void @_ZNSt13suspend_never12await_resumeEv(34// CHECK: %[[CLEANUP_DEST1:.+]] = phi i32 [ 0, %[[FINAL_READY]] ], [ 2, %[[FINAL_CLEANUP]] ]35// CHECK: %[[CLEANUP_DEST2:.+]] = phi i32 [ %[[CLEANUP_DEST0]], %{{.+}} ], [ %[[CLEANUP_DEST1]], %{{.+}} ], [ 0, %{{.+}} ]36// CHECK: call ptr @llvm.coro.free(37// CHECK: switch i32 %[[CLEANUP_DEST2]], label %{{.+}} [38// CHECK-NEXT: i32 039// CHECK-NEXT: i32 240// CHECK-NEXT: ]41