clang/test/CodeGenCoroutines/coro-always-inline-exp-namespace.cpp

   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; }