1 // RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-unknown-linux-gnu -emit-llvm -std=c++20 \ 2 // RUN: -O0 %s -o - | FileCheck %s 3 // RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-unknown-linux-gnu -emit-llvm -std=c++20 \ 4 // RUN: -fno-inline -O0 %s -o - | FileCheck %s 5 6 namespace std { 7 8 struct handle {}; 9 10 struct awaitable { 11 bool await_ready() noexcept { return true; } 12 // CHECK-NOT: await_suspend 13 inline void __attribute__((__always_inline__)) await_suspend(handle) noexcept {} 14 bool await_resume() noexcept { return true; } 15 }; 16 17 template <typename T> 18 struct coroutine_handle { 19 static handle from_address(void *address) noexcept { return {}; } 20 }; 21 22 template <typename T = void> 23 struct coroutine_traits { 24 struct promise_type { 25 awaitable initial_suspend() { return {}; } 26 awaitable final_suspend() noexcept { return {}; } 27 void return_void() {} 28 T get_return_object() { return T(); } 29 void unhandled_exception() {} 30 }; 31 }; 32 } // namespace std 33 34 // CHECK-LABEL: @_Z3foov 35 // CHECK-LABEL: entry: 36 // CHECK: [[CAST0:%[0-9]+]] = bitcast %"struct.std::awaitable"* %ref.tmp{{.*}} to i8* 37 // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* [[CAST0]]) 38 // CHECK: [[CAST1:%[0-9]+]] = bitcast %"struct.std::awaitable"* %ref.tmp{{.*}} to i8* 39 // CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* [[CAST1]]) 40 41 // CHECK: [[CAST2:%[0-9]+]] = bitcast %"struct.std::awaitable"* %ref.tmp{{.*}} to i8* 42 // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* [[CAST2]]) 43 // CHECK: [[CAST3:%[0-9]+]] = bitcast %"struct.std::awaitable"* %ref.tmp{{.*}} to i8* 44 // CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* [[CAST3]]) 45 void foo() { co_return; } 46 47 // Check that bar is not inlined even it's marked as always_inline. 48 49 // CHECK-LABEL: define {{.*}} void @_Z3bazv() 50 // CHECK: call void @_Z3barv( 51 __attribute__((__always_inline__)) void bar() { 52 co_return; 53 } 54 void baz() { 55 bar(); 56 co_return; 57 } 58