// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++20 -O2 \
// RUN: -Wno-coroutine-missing-unhandled-exception -emit-llvm %s -o - -disable-llvm-passes \
// RUN: | FileCheck %s
namespace std {
template <typename... T>
struct coroutine_traits; // expected-note {{declared here}}
template <class Promise = void>
struct coroutine_handle {
coroutine_handle() = default;
static coroutine_handle from_address(void *) noexcept { return {}; }
};
template <>
struct coroutine_handle<void> {
static coroutine_handle from_address(void *) { return {}; }
coroutine_handle() = default;
template <class PromiseType>
coroutine_handle(coroutine_handle<PromiseType>) noexcept {}
};
struct nothrow_t {};
constexpr nothrow_t nothrow = {};
} // end namespace std
// Required when get_return_object_on_allocation_failure() is defined by
// the promise.
using SizeT = decltype(sizeof(int));
void* operator new(SizeT __sz, const std::nothrow_t&) noexcept;
void operator delete(void* __p, const std::nothrow_t&) noexcept;
struct suspend_always {
bool await_ready() noexcept { return false; }
void await_suspend(std::coroutine_handle<>) noexcept {}
void await_resume() noexcept {}
};
struct global_new_delete_tag {};
template <>
struct std::coroutine_traits<void, global_new_delete_tag> {
struct promise_type {
void get_return_object() {}
suspend_always initial_suspend() { return {}; }
suspend_always final_suspend() noexcept { return {}; }
void return_void() {}
};
};
// CHECK-LABEL: f0(
extern "C" void f0(global_new_delete_tag) {
// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
// CHECK: %[[NeedAlloc:.+]] = call i1 @llvm.coro.alloc(token %[[ID]])
// CHECK: br i1 %[[NeedAlloc]], label %[[AllocBB:.+]], label %[[InitBB:.+]]
// CHECK: [[AllocBB]]:
// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
// CHECK: %[[MEM:.+]] = call noalias noundef nonnull ptr @_Znwm(i64 noundef %[[SIZE]])
// CHECK: br label %[[InitBB]]
// CHECK: [[InitBB]]:
// CHECK: %[[PHI:.+]] = phi ptr [ null, %{{.+}} ], [ %call, %[[AllocBB]] ]
// CHECK: %[[FRAME:.+]] = call ptr @llvm.coro.begin(token %[[ID]], ptr %[[PHI]])
// CHECK: %[[MEM:.+]] = call ptr @llvm.coro.free(token %[[ID]], ptr %[[FRAME]])
// CHECK: %[[NeedDealloc:.+]] = icmp ne ptr %[[MEM]], null
// CHECK: br i1 %[[NeedDealloc]], label %[[FreeBB:.+]], label %[[Afterwards:.+]]
// CHECK: [[FreeBB]]:
// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
// CHECK: call void @_ZdlPvm(ptr noundef %[[MEM]], i64 noundef %[[SIZE]])
// CHECK: br label %[[Afterwards]]
// CHECK: [[Afterwards]]:
// CHECK: ret void
co_return;
}
struct promise_new_tag {};
template <>
struct std::coroutine_traits<void, promise_new_tag> {
struct promise_type {
void *operator new(unsigned long);
void get_return_object() {}
suspend_always initial_suspend() { return {}; }
suspend_always final_suspend() noexcept { return {}; }
void return_void() {}
};
};
// CHECK-LABEL: f1(
extern "C" void f1(promise_new_tag ) {
// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
// CHECK: call noundef ptr @_ZNSt16coroutine_traitsIJv15promise_new_tagEE12promise_typenwEm(i64 noundef %[[SIZE]])
// CHECK: %[[FRAME:.+]] = call ptr @llvm.coro.begin(
// CHECK: %[[MEM:.+]] = call ptr @llvm.coro.free(token %[[ID]], ptr %[[FRAME]])
// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
// CHECK: call void @_ZdlPvm(ptr noundef %[[MEM]], i64 noundef %[[SIZE]])
co_return;
}
struct promise_matching_placement_new_tag {};
template <>
struct std::coroutine_traits<void, promise_matching_placement_new_tag, int, float, double> {
struct promise_type {
void *operator new(unsigned long, promise_matching_placement_new_tag,
int, float, double);
void get_return_object() {}
suspend_always initial_suspend() { return {}; }
suspend_always final_suspend() noexcept { return {}; }
void return_void() {}
};
};
// CHECK-LABEL: f1a(
extern "C" void f1a(promise_matching_placement_new_tag, int x, float y , double z) {
// CHECK: store i32 %x, ptr %x.addr, align 4
// CHECK: store float %y, ptr %y.addr, align 4
// CHECK: store double %z, ptr %z.addr, align 8
// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
// CHECK: %[[INT:.+]] = load i32, ptr %x.addr, align 4
// CHECK: %[[FLOAT:.+]] = load float, ptr %y.addr, align 4
// CHECK: %[[DOUBLE:.+]] = load double, ptr %z.addr, align 8
// CHECK: call noundef ptr @_ZNSt16coroutine_traitsIJv34promise_matching_placement_new_tagifdEE12promise_typenwEmS0_ifd(i64 noundef %[[SIZE]], i32 noundef %[[INT]], float noundef %[[FLOAT]], double noundef %[[DOUBLE]])
co_return;
}
// Declare a placement form operator new, such as the one described in
// C++ 18.6.1.3.1, which takes a ptr argument.
void* operator new(SizeT __sz, void *__p) noexcept;
struct promise_matching_global_placement_new_tag {};
struct dummy {};
template <>
struct std::coroutine_traits<void, promise_matching_global_placement_new_tag, dummy *> {
struct promise_type {
void get_return_object() {}
suspend_always initial_suspend() { return {}; }
suspend_always final_suspend() noexcept { return {}; }
void return_void() {}
};
};
// A coroutine that takes a single pointer argument should not invoke this
// placement form operator. [dcl.fct.def.coroutine]/7 dictates that lookup for
// allocation functions matching the coroutine function's signature be done
// within the scope of the promise type's class.
// CHECK-LABEL: f1b(
extern "C" void f1b(promise_matching_global_placement_new_tag, dummy *) {
// CHECK: call noalias noundef nonnull ptr @_Znwm(i64
co_return;
}
struct promise_delete_tag {};
template <>
struct std::coroutine_traits<void, promise_delete_tag> {
struct promise_type {
void operator delete(void*);
void get_return_object() {}
suspend_always initial_suspend() { return {}; }
suspend_always final_suspend() noexcept { return {}; }
void return_void() {}
};
};
// CHECK-LABEL: f2(
extern "C" void f2(promise_delete_tag) {
// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
// CHECK: call noalias noundef nonnull ptr @_Znwm(i64 noundef %[[SIZE]])
// CHECK: %[[FRAME:.+]] = call ptr @llvm.coro.begin(
// CHECK: %[[MEM:.+]] = call ptr @llvm.coro.free(token %[[ID]], ptr %[[FRAME]])
// CHECK: call void @_ZNSt16coroutine_traitsIJv18promise_delete_tagEE12promise_typedlEPv(ptr noundef %[[MEM]])
co_return;
}
struct promise_sized_delete_tag {};
template <>
struct std::coroutine_traits<void, promise_sized_delete_tag> {
struct promise_type {
void operator delete(void*, unsigned long);
void get_return_object() {}
suspend_always initial_suspend() { return {}; }
suspend_always final_suspend() noexcept { return {}; }
void return_void() {}
};
};
// CHECK-LABEL: f3(
extern "C" void f3(promise_sized_delete_tag) {
// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
// CHECK: call noalias noundef nonnull ptr @_Znwm(i64 noundef %[[SIZE]])
// CHECK: %[[FRAME:.+]] = call ptr @llvm.coro.begin(
// CHECK: %[[MEM:.+]] = call ptr @llvm.coro.free(token %[[ID]], ptr %[[FRAME]])
// CHECK: %[[SIZE2:.+]] = call i64 @llvm.coro.size.i64()
// CHECK: call void @_ZNSt16coroutine_traitsIJv24promise_sized_delete_tagEE12promise_typedlEPvm(ptr noundef %[[MEM]], i64 noundef %[[SIZE2]])
co_return;
}
struct promise_on_alloc_failure_tag {};
template <>
struct std::coroutine_traits<int, promise_on_alloc_failure_tag> {
struct promise_type {
int get_return_object() { return 0; }
suspend_always initial_suspend() { return {}; }
suspend_always final_suspend() noexcept { return {}; }
void return_void() {}
static int get_return_object_on_allocation_failure() { return -1; }
};
};
// CHECK-LABEL: f4(
extern "C" int f4(promise_on_alloc_failure_tag) {
// CHECK: %[[RetVal:.+]] = alloca i32
// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
// CHECK: %[[MEM:.+]] = call noalias noundef ptr @_ZnwmRKSt9nothrow_t(i64 noundef %[[SIZE]], ptr noundef nonnull align 1 dereferenceable(1) @_ZStL7nothrow)
// CHECK: %[[OK:.+]] = icmp ne ptr %[[MEM]], null
// CHECK: call i1 @llvm.expect.i1(i1 %[[OK]], i1 true)
// CHECK: br i1 %[[OK]], label %[[OKBB:.+]], label %[[ERRBB:.+]]
// CHECK: [[ERRBB]]:
// CHECK: %[[FailRet:.+]] = call noundef i32 @_ZNSt16coroutine_traitsIJi28promise_on_alloc_failure_tagEE12promise_type39get_return_object_on_allocation_failureEv(
// CHECK: store i32 %[[FailRet]], ptr %[[RetVal]]
// CHECK: br label %[[RetBB:.+]]
// CHECK: [[OKBB]]:
// CHECK: %[[OkRet:.+]] = call noundef i32 @_ZNSt16coroutine_traitsIJi28promise_on_alloc_failure_tagEE12promise_type17get_return_objectEv(
// CHECK: [[RetBB]]:
// CHECK: %[[LoadRet:.+]] = load i32, ptr %[[RetVal]], align 4
// CHECK: ret i32 %[[LoadRet]]
co_return;
}
struct promise_sized_delete_tag2 {};
template <>
struct std::coroutine_traits<void, promise_sized_delete_tag2> {
struct promise_type {
// Tests that the compiler can choose the correct operator delete
// when we have multiple operator delete
void operator delete(void*, unsigned long);
void operator delete(void*);
void get_return_object() {}
suspend_always initial_suspend() { return {}; }
suspend_always final_suspend() noexcept { return {}; }
void return_void() {}
};
};
// CHECK-LABEL: f5(
extern "C" void f5(promise_sized_delete_tag2) {
// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
// CHECK: call noalias noundef nonnull ptr @_Znwm(i64 noundef %[[SIZE]])
// CHECK: %[[FRAME:.+]] = call ptr @llvm.coro.begin(
// CHECK: %[[MEM:.+]] = call ptr @llvm.coro.free(token %[[ID]], ptr %[[FRAME]])
// CHECK: %[[SIZE2:.+]] = call i64 @llvm.coro.size.i64()
// CHECK: call void @_ZNSt16coroutine_traitsIJv25promise_sized_delete_tag2EE12promise_typedlEPvm(ptr noundef %[[MEM]], i64 noundef %[[SIZE2]])
co_return;
}
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