~shimon/dismaltc

ref: 461e0617cb03f1d5027af4fbb3da0722791022e9 dismaltc/clang/disable-test/CodeGenCoroutines/coro-await.cpp -rw-r--r-- 12.4 KiB
461e0617Itoh Shimon re-enable tests. 1 year, 6 months ago
                                                                                
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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fcoroutines-ts -std=c++14 \
// RUN:   -emit-llvm %s -o - -disable-llvm-passes -Wno-coroutine -Wno-unused | FileCheck %s

namespace std {
namespace experimental {
template <typename... T>
struct coroutine_traits;

template <typename Promise = void> struct coroutine_handle;

template <>
struct coroutine_handle<void> {
  void *ptr;
  static coroutine_handle from_address(void *);
  void *address();
};

template <typename Promise>
struct coroutine_handle : coroutine_handle<> {
  static coroutine_handle from_address(void *);
};

}
}

struct init_susp {
  bool await_ready();
  void await_suspend(std::experimental::coroutine_handle<>);
  void await_resume();
};
struct final_susp {
  bool await_ready();
  void await_suspend(std::experimental::coroutine_handle<>);
  void await_resume();
};

struct suspend_always {
  int stuff;
  bool await_ready();
  void await_suspend(std::experimental::coroutine_handle<>);
  void await_resume();
};

template<>
struct std::experimental::coroutine_traits<void> {
  struct promise_type {
    void get_return_object();
    init_susp initial_suspend();
    final_susp final_suspend();
    void return_void();
  };
};

// CHECK-LABEL: f0(
extern "C" void f0() {
  // CHECK: %[[FRAME:.+]] = call i8* @llvm.coro.begin(

  // See if initial_suspend was issued:
  // ----------------------------------
  // CHECK: call void @_ZNSt12experimental16coroutine_traitsIJvEE12promise_type15initial_suspendEv(
  // CHECK-NEXT: call zeroext i1 @_ZN9init_susp11await_readyEv(%struct.init_susp*
  // CHECK: %[[INITSP_ID:.+]] = call token @llvm.coro.save(
  // CHECK: call i8 @llvm.coro.suspend(token %[[INITSP_ID]], i1 false)

  co_await suspend_always{};
  // See if we need to suspend:
  // --------------------------
  // CHECK: %[[READY:.+]] = call zeroext i1 @_ZN14suspend_always11await_readyEv(%struct.suspend_always* %[[AWAITABLE:.+]])
  // CHECK: br i1 %[[READY]], label %[[READY_BB:.+]], label %[[SUSPEND_BB:.+]]

  // If we are suspending:
  // ---------------------
  // CHECK: [[SUSPEND_BB]]:
  // CHECK: %[[SUSPEND_ID:.+]] = call token @llvm.coro.save(
  // ---------------------------
  // Build the coroutine handle and pass it to await_suspend
  // ---------------------------
  // CHECK: call i8* @_ZNSt12experimental16coroutine_handleINS_16coroutine_traitsIJvEE12promise_typeEE12from_addressEPv(i8* %[[FRAME]])
  //   ... many lines of code to coerce coroutine_handle into an i8* scalar
  // CHECK: %[[CH:.+]] = load i8*, i8** %{{.+}}
  // CHECK: call void @_ZN14suspend_always13await_suspendENSt12experimental16coroutine_handleIvEE(%struct.suspend_always* %[[AWAITABLE]], i8* %[[CH]])
  // -------------------------
  // Generate a suspend point:
  // -------------------------
  // CHECK: %[[OUTCOME:.+]] = call i8 @llvm.coro.suspend(token %[[SUSPEND_ID]], i1 false)
  // CHECK: switch i8 %[[OUTCOME]], label %[[RET_BB:.+]] [
  // CHECK:   i8 0, label %[[READY_BB]]
  // CHECK:   i8 1, label %[[CLEANUP_BB:.+]]
  // CHECK: ]

  // Cleanup code goes here:
  // -----------------------
  // CHECK: [[CLEANUP_BB]]:

  // When coroutine is resumed, call await_resume
  // --------------------------
  // CHECK: [[READY_BB]]:
  // CHECK:  call void @_ZN14suspend_always12await_resumeEv(%struct.suspend_always* %[[AWAITABLE]])

  // See if final_suspend was issued:
  // ----------------------------------
  // CHECK: call void @_ZNSt12experimental16coroutine_traitsIJvEE12promise_type13final_suspendEv(
  // CHECK-NEXT: call zeroext i1 @_ZN10final_susp11await_readyEv(%struct.final_susp*
  // CHECK: %[[FINALSP_ID:.+]] = call token @llvm.coro.save(
  // CHECK: call i8 @llvm.coro.suspend(token %[[FINALSP_ID]], i1 true)
}

struct suspend_maybe {
  float stuff;
  ~suspend_maybe();
  bool await_ready();
  bool await_suspend(std::experimental::coroutine_handle<>);
  void await_resume();
};


template<>
struct std::experimental::coroutine_traits<void,int> {
  struct promise_type {
    void get_return_object();
    init_susp initial_suspend();
    final_susp final_suspend();
    void return_void();
    suspend_maybe yield_value(int);
  };
};

// CHECK-LABEL: f1(
extern "C" void f1(int) {
  // CHECK: %[[PROMISE:.+]] = alloca %"struct.std::experimental::coroutine_traits<void, int>::promise_type"
  // CHECK: %[[FRAME:.+]] = call i8* @llvm.coro.begin(
  co_yield 42;
  // CHECK: call void @_ZNSt12experimental16coroutine_traitsIJviEE12promise_type11yield_valueEi(%struct.suspend_maybe* sret %[[AWAITER:.+]], %"struct.std::experimental::coroutine_traits<void, int>::promise_type"* %[[PROMISE]], i32 42)

  // See if we need to suspend:
  // --------------------------
  // CHECK: %[[READY:.+]] = call zeroext i1 @_ZN13suspend_maybe11await_readyEv(%struct.suspend_maybe* %[[AWAITABLE]])
  // CHECK: br i1 %[[READY]], label %[[READY_BB:.+]], label %[[SUSPEND_BB:.+]]

  // If we are suspending:
  // ---------------------
  // CHECK: [[SUSPEND_BB]]:
  // CHECK: %[[SUSPEND_ID:.+]] = call token @llvm.coro.save(
  // ---------------------------
  // Build the coroutine handle and pass it to await_suspend
  // ---------------------------
  // CHECK: call i8* @_ZNSt12experimental16coroutine_handleINS_16coroutine_traitsIJviEE12promise_typeEE12from_addressEPv(i8* %[[FRAME]])
  //   ... many lines of code to coerce coroutine_handle into an i8* scalar
  // CHECK: %[[CH:.+]] = load i8*, i8** %{{.+}}
  // CHECK: %[[YES:.+]] = call zeroext i1 @_ZN13suspend_maybe13await_suspendENSt12experimental16coroutine_handleIvEE(%struct.suspend_maybe* %[[AWAITABLE]], i8* %[[CH]])
  // -------------------------------------------
  // See if await_suspend decided not to suspend
  // -------------------------------------------
  // CHECK: br i1 %[[YES]], label %[[SUSPEND_PLEASE:.+]], label %[[READY_BB]]

  // CHECK: [[SUSPEND_PLEASE]]:
  // CHECK:    call i8 @llvm.coro.suspend(token %[[SUSPEND_ID]], i1 false)

  // CHECK: [[READY_BB]]:
  // CHECK:     call void @_ZN13suspend_maybe12await_resumeEv(%struct.suspend_maybe* %[[AWAITABLE]])
}

struct ComplexAwaiter {
  template <typename F> void await_suspend(F);
  bool await_ready();
  _Complex float await_resume();
};
extern "C" void UseComplex(_Complex float);

// CHECK-LABEL: @TestComplex(
extern "C" void TestComplex() {
  UseComplex(co_await ComplexAwaiter{});
  // CHECK: call <2 x float> @_ZN14ComplexAwaiter12await_resumeEv(%struct.ComplexAwaiter*
  // CHECK: call void @UseComplex(<2 x float> %{{.+}})

  co_await ComplexAwaiter{};
  // CHECK: call <2 x float> @_ZN14ComplexAwaiter12await_resumeEv(%struct.ComplexAwaiter*

  _Complex float Val = co_await ComplexAwaiter{};
  // CHECK: call <2 x float> @_ZN14ComplexAwaiter12await_resumeEv(%struct.ComplexAwaiter*
}

struct Aggr { int X, Y, Z; ~Aggr(); };
struct AggrAwaiter {
  template <typename F> void await_suspend(F);
  bool await_ready();
  Aggr await_resume();
};

extern "C" void Whatever();
extern "C" void UseAggr(Aggr&&);

// FIXME: Once the cleanup code is in, add testing that destructors for Aggr
// are invoked properly on the cleanup branches.

// CHECK-LABEL: @TestAggr(
extern "C" void TestAggr() {
  UseAggr(co_await AggrAwaiter{});
  Whatever();
  // CHECK: call void @_ZN11AggrAwaiter12await_resumeEv(%struct.Aggr* sret %[[AwaitResume:.+]],
  // CHECK: call void @UseAggr(%struct.Aggr* dereferenceable(12) %[[AwaitResume]])
  // CHECK: call void @_ZN4AggrD1Ev(%struct.Aggr* %[[AwaitResume]])
  // CHECK: call void @Whatever()

  co_await AggrAwaiter{};
  Whatever();
  // CHECK: call void @_ZN11AggrAwaiter12await_resumeEv(%struct.Aggr* sret %[[AwaitResume2:.+]],
  // CHECK: call void @_ZN4AggrD1Ev(%struct.Aggr* %[[AwaitResume2]])
  // CHECK: call void @Whatever()

  Aggr Val = co_await AggrAwaiter{};
  Whatever();
  // CHECK: call void @_ZN11AggrAwaiter12await_resumeEv(%struct.Aggr* sret %[[AwaitResume3:.+]],
  // CHECK: call void @Whatever()
  // CHECK: call void @_ZN4AggrD1Ev(%struct.Aggr* %[[AwaitResume3]])
}

struct ScalarAwaiter {
  template <typename F> void await_suspend(F);
  bool await_ready();
  int await_resume();
};

extern "C" void UseScalar(int);

// CHECK-LABEL: @TestScalar(
extern "C" void TestScalar() {
  UseScalar(co_await ScalarAwaiter{});
  // CHECK: %[[Result:.+]] = call i32 @_ZN13ScalarAwaiter12await_resumeEv(%struct.ScalarAwaiter*
  // CHECK: call void @UseScalar(i32 %[[Result]])

  int Val = co_await ScalarAwaiter{};
  // CHECK: %[[Result2:.+]] = call i32 @_ZN13ScalarAwaiter12await_resumeEv(%struct.ScalarAwaiter*
  // CHECK: store i32 %[[Result2]], i32* %Val

  co_await ScalarAwaiter{};
  // CHECK: call i32 @_ZN13ScalarAwaiter12await_resumeEv(%struct.ScalarAwaiter*
}

// Test operator co_await codegen.
enum class MyInt: int {};
ScalarAwaiter operator co_await(MyInt);

struct MyAgg {
  AggrAwaiter operator co_await();
};

// CHECK-LABEL: @TestOpAwait(
extern "C" void TestOpAwait() {
  co_await MyInt(42);
  // CHECK: call void @_Zaw5MyInt(i32 42)
  // CHECK: call i32 @_ZN13ScalarAwaiter12await_resumeEv(%struct.ScalarAwaiter* %

  co_await MyAgg{};
  // CHECK: call void @_ZN5MyAggawEv(%struct.MyAgg* %
  // CHECK: call void @_ZN11AggrAwaiter12await_resumeEv(%struct.Aggr* sret %
}

// CHECK-LABEL: EndlessLoop(
extern "C" void EndlessLoop() {
  // CHECK: %[[FRAME:.+]] = call i8* @llvm.coro.begin(

  // See if initial_suspend was issued:
  // ----------------------------------
  // CHECK: call void @_ZNSt12experimental16coroutine_traitsIJvEE12promise_type15initial_suspendEv(
  // CHECK-NEXT: call zeroext i1 @_ZN9init_susp11await_readyEv(%struct.init_susp*

  for (;;)
    co_await suspend_always{};

  // Verify that final_suspend was NOT issued:
  // ----------------------------------
  // CHECK-NOT: call void @_ZNSt12experimental16coroutine_traitsIJvEE12promise_type13final_suspendEv(
  // CHECK-NOT: call zeroext i1 @_ZN10final_susp11await_readyEv(%struct.final_susp*
}

// Verifies that we don't crash when awaiting on an lvalue.
// CHECK-LABEL: @_Z11AwaitLValuev(
void AwaitLValue() {
  suspend_always lval;
  co_await lval;
}

struct RefTag { };

struct AwaitResumeReturnsLValue {
  bool await_ready();
  void await_suspend(std::experimental::coroutine_handle<>);
  RefTag& await_resume();
};


template<>
struct std::experimental::coroutine_traits<void,double> {
  struct promise_type {
    void get_return_object();
    init_susp initial_suspend();
    final_susp final_suspend();
    void return_void();
    AwaitResumeReturnsLValue yield_value(int);
  };
};

// Verifies that we don't crash when returning an lvalue from an await_resume()
// expression.
// CHECK-LABEL:  define void @_Z18AwaitReturnsLValued(double)
void AwaitReturnsLValue(double) {
  AwaitResumeReturnsLValue a;
  // CHECK: %[[AVAR:.+]] = alloca %struct.AwaitResumeReturnsLValue,
  // CHECK: %[[XVAR:.+]] = alloca %struct.RefTag*,

  // CHECK: %[[YVAR:.+]] = alloca %struct.RefTag*,
  // CHECK-NEXT: %[[TMP1:.+]] = alloca %struct.AwaitResumeReturnsLValue,

  // CHECK: %[[ZVAR:.+]] = alloca %struct.RefTag*,
  // CHECK-NEXT: %[[TMP2:.+]] = alloca %struct.AwaitResumeReturnsLValue,

  // CHECK: %[[RES1:.+]] = call dereferenceable({{.*}}) %struct.RefTag* @_ZN24AwaitResumeReturnsLValue12await_resumeEv(%struct.AwaitResumeReturnsLValue* %[[AVAR]])
  // CHECK-NEXT: store %struct.RefTag* %[[RES1]], %struct.RefTag** %[[XVAR]],
  RefTag& x = co_await a;

  // CHECK: %[[RES2:.+]] = call dereferenceable({{.*}}) %struct.RefTag* @_ZN24AwaitResumeReturnsLValue12await_resumeEv(%struct.AwaitResumeReturnsLValue* %[[TMP1]])
  // CHECK-NEXT: store %struct.RefTag* %[[RES2]], %struct.RefTag** %[[YVAR]],

  RefTag& y = co_await AwaitResumeReturnsLValue{};
  // CHECK: %[[RES3:.+]] = call dereferenceable({{.*}}) %struct.RefTag* @_ZN24AwaitResumeReturnsLValue12await_resumeEv(%struct.AwaitResumeReturnsLValue* %[[TMP2]])
  // CHECK-NEXT: store %struct.RefTag* %[[RES3]], %struct.RefTag** %[[ZVAR]],
  RefTag& z = co_yield 42;
}

struct TailCallAwait {
  bool await_ready();
  std::experimental::coroutine_handle<> await_suspend(std::experimental::coroutine_handle<>);
  void await_resume();
};

// CHECK-LABEL: @TestTailcall(
extern "C" void TestTailcall() {
  co_await TailCallAwait{};

  // CHECK: %[[RESULT:.+]] = call i8* @_ZN13TailCallAwait13await_suspendENSt12experimental16coroutine_handleIvEE(%struct.TailCallAwait*
  // CHECK: %[[COERCE:.+]] = getelementptr inbounds %"struct.std::experimental::coroutine_handle", %"struct.std::experimental::coroutine_handle"* %[[TMP:.+]], i32 0, i32 0
  // CHECK: store i8* %[[RESULT]], i8** %[[COERCE]]
  // CHECK: %[[ADDR:.+]] = call i8* @_ZNSt12experimental16coroutine_handleIvE7addressEv(%"struct.std::experimental::coroutine_handle"* %[[TMP]])
  // CHECK: call void @llvm.coro.resume(i8* %[[ADDR]])
}