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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++20 -emit-llvm %s -o - -disable-llvm-passes | FileCheck %s
#include "Inputs/coroutine.h"
using namespace std;
namespace std {
struct nothrow_t {};
constexpr nothrow_t nothrow = {};
} // end namespace std
// Required when get_return_object_on_allocation_failure() is defined by
// the promise.
void* operator new(__SIZE_TYPE__ __sz, const std::nothrow_t&) noexcept;
void operator delete(void* __p, const std::nothrow_t&) noexcept;
template <class RetObject>
struct promise_type {
RetObject get_return_object();
suspend_always initial_suspend();
suspend_never final_suspend() noexcept;
void return_void();
static void unhandled_exception();
};
struct coro {
using promise_type = promise_type<coro>;
coro(coro const&);
struct Impl;
Impl *impl;
};
// Verify that the RVO is applied.
// CHECK-LABEL: define{{.*}} void @_Z1fi(ptr dead_on_unwind noalias writable sret(%struct.coro) align 8 %agg.result, i32 noundef %0)
coro f(int) {
// CHECK: %call = call noalias noundef nonnull ptr @_Znwm(
// CHECK-NEXT: br label %[[CoroInit:.*]]
// CHECK: {{.*}}[[CoroInit]]:
// CHECK: call void @{{.*get_return_objectEv}}(ptr dead_on_unwind writable sret(%struct.coro) align 8 %agg.result
co_return;
}
template <class RetObject>
struct promise_type_with_on_alloc_failure {
static RetObject get_return_object_on_allocation_failure();
RetObject get_return_object();
suspend_always initial_suspend();
suspend_never final_suspend() noexcept;
void return_void();
static void unhandled_exception();
};
struct coro_two {
using promise_type = promise_type_with_on_alloc_failure<coro_two>;
coro_two(coro_two const&);
struct Impl;
Impl *impl;
};
// Verify that the RVO is applied.
// CHECK-LABEL: define{{.*}} void @_Z1hi(ptr dead_on_unwind noalias writable sret(%struct.coro_two) align 8 %agg.result, i32 noundef %0)
coro_two h(int) {
// CHECK: %call = call noalias noundef ptr @_ZnwmRKSt9nothrow_t
// CHECK-NEXT: %[[CheckNull:.*]] = icmp ne ptr %call, null
// CHECK-NEXT: br i1 %[[CheckNull]], label %[[InitOnSuccess:.*]], label %[[InitOnFailure:.*]]
// CHECK: {{.*}}[[InitOnFailure]]:
// CHECK-NEXT: call void @{{.*get_return_object_on_allocation_failureEv}}(ptr dead_on_unwind writable sret(%struct.coro_two) align 8 %agg.result
// CHECK-NEXT: br label %[[RetLabel:.*]]
// CHECK: {{.*}}[[InitOnSuccess]]:
// CHECK: call void @{{.*get_return_objectEv}}(ptr dead_on_unwind writable sret(%struct.coro_two) align 8 %agg.result
// CHECK: [[RetLabel]]:
// CHECK-NEXT: ret void
co_return;
}
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