1 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -std=c++20 \ 2 // RUN: -fexperimental-new-pass-manager -O0 %s -o - | FileCheck %s 3 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -std=c++20 \ 4 // RUN: -fexperimental-new-pass-manager -fno-inline -O0 %s -o - | FileCheck %s 5 6 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -std=c++20 \ 7 // RUN: -O0 %s -o - | FileCheck %s 8 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -std=c++20 \ 9 // RUN: -fno-inline -O0 %s -o - | FileCheck %s 10 11 namespace std { 12 13 struct handle {}; 14 15 struct awaitable { 16 bool await_ready() noexcept { return true; } 17 // CHECK-NOT: await_suspend 18 inline void __attribute__((__always_inline__)) await_suspend(handle) noexcept {} 19 bool await_resume() noexcept { return true; } 20 }; 21 22 template <typename T> 23 struct coroutine_handle { 24 static handle from_address(void *address) noexcept { return {}; } 25 }; 26 27 template <typename T = void> 28 struct coroutine_traits { 29 struct promise_type { 30 awaitable initial_suspend() { return {}; } 31 awaitable final_suspend() noexcept { return {}; } 32 void return_void() {} 33 T get_return_object() { return T(); } 34 void unhandled_exception() {} 35 }; 36 }; 37 } // namespace std 38 39 // CHECK-LABEL: @_Z3foov 40 // CHECK-LABEL: entry: 41 // CHECK: [[CAST0:%[0-9]+]] = bitcast %"struct.std::awaitable"* %ref.tmp{{.*}} to i8* 42 // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* [[CAST0]]) 43 // CHECK: [[CAST1:%[0-9]+]] = bitcast %"struct.std::awaitable"* %ref.tmp{{.*}} to i8* 44 // CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* [[CAST1]]) 45 46 // CHECK: [[CAST2:%[0-9]+]] = bitcast %"struct.std::awaitable"* %ref.tmp{{.*}} to i8* 47 // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* [[CAST2]]) 48 // CHECK: [[CAST3:%[0-9]+]] = bitcast %"struct.std::awaitable"* %ref.tmp{{.*}} to i8* 49 // CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* [[CAST3]]) 50 void foo() { co_return; } 51