1 // RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-unknown-linux-gnu -emit-llvm -fcoroutines-ts \ 2 // RUN: -O0 %s -o - | FileCheck %s 3 // RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-unknown-linux-gnu -emit-llvm -fcoroutines-ts \ 4 // RUN: -fno-inline -O0 %s -o - | FileCheck %s 5 6 namespace std { 7 namespace experimental { 8 9 struct handle {}; 10 11 struct awaitable { 12 bool await_ready() noexcept { return true; } 13 // CHECK-NOT: await_suspend 14 inline void __attribute__((__always_inline__)) await_suspend(handle) noexcept {} 15 bool await_resume() noexcept { return true; } 16 }; 17 18 template <typename T> 19 struct coroutine_handle { 20 static handle from_address(void *address) noexcept { return {}; } 21 }; 22 23 template <typename T = void> 24 struct coroutine_traits { 25 struct promise_type { 26 awaitable initial_suspend() { return {}; } 27 awaitable final_suspend() noexcept { return {}; } 28 void return_void() {} 29 T get_return_object() { return T(); } 30 void unhandled_exception() {} 31 }; 32 }; 33 } // namespace experimental 34 } // namespace std 35 36 // CHECK-LABEL: @_Z3foov 37 // CHECK-LABEL: entry: 38 // CHECK: [[CAST0:%[0-9]+]] = bitcast %"struct.std::experimental::awaitable"* %ref.tmp{{.*}} to i8* 39 // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* [[CAST0]]) 40 // CHECK: [[CAST1:%[0-9]+]] = bitcast %"struct.std::experimental::awaitable"* %ref.tmp{{.*}} to i8* 41 // CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* [[CAST1]]) 42 43 // CHECK: [[CAST2:%[0-9]+]] = bitcast %"struct.std::experimental::awaitable"* %ref.tmp{{.*}} to i8* 44 // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* [[CAST2]]) 45 // CHECK: [[CAST3:%[0-9]+]] = bitcast %"struct.std::experimental::awaitable"* %ref.tmp{{.*}} to i8* 46 // CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* [[CAST3]]) 47 void foo() { co_return; } 48