1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
// RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-unknown-linux-gnu -fcoroutines-ts -std=c++14 -emit-llvm %s -o - -disable-llvm-passes | FileCheck %s
#include "Inputs/coroutine-exp-namespace.h"
using namespace std::experimental;
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(%struct.coro* noalias sret(%struct.coro) align 8 %agg.result, i32 noundef %0)
coro f(int) {
// CHECK: %call = call noalias noundef nonnull i8* @_Znwm(
// CHECK-NEXT: br label %[[CoroInit:.*]]
// CHECK: {{.*}}[[CoroInit]]:
// CHECK: call void @{{.*get_return_objectEv}}(%struct.coro* 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 NRVO is applied to the Gro object.
// CHECK-LABEL: define{{.*}} void @_Z1hi(%struct.coro_two* noalias sret(%struct.coro_two) align 8 %agg.result, i32 noundef %0)
coro_two h(int) {
// CHECK: %call = call noalias noundef i8* @_ZnwmRKSt9nothrow_t
// CHECK-NEXT: %[[CheckNull:.*]] = icmp ne i8* %call, null
// CHECK-NEXT: br i1 %[[CheckNull]], label %[[InitOnSuccess:.*]], label %[[InitOnFailure:.*]]
// CHECK: {{.*}}[[InitOnFailure]]:
// CHECK-NEXT: call void @{{.*get_return_object_on_allocation_failureEv}}(%struct.coro_two* sret(%struct.coro_two) align 8 %agg.result
// CHECK-NEXT: br label %[[RetLabel:.*]]
// CHECK: {{.*}}[[InitOnSuccess]]:
// CHECK: call void @{{.*get_return_objectEv}}(%struct.coro_two* sret(%struct.coro_two) align 8 %agg.result
// CHECK: [[RetLabel]]:
// CHECK-NEXT: ret void
co_return;
}
|
