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
|
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
// RUN: %clang_cc1 -O1 -disable-llvm-passes -emit-llvm %s -o - -triple=x86_64-linux-gnu -verify
// RUN: %clang_cc1 -O1 -disable-llvm-passes -emit-llvm %s -o - -triple=x86_64-linux-gnu | FileCheck %s
// CHECK-LABEL: @_Z2wli(
// CHECK-NEXT: entry:
// CHECK-NEXT: [[E_ADDR:%.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 [[E:%.*]], ptr [[E_ADDR]], align 4, !tbaa [[TBAA2:![0-9]+]]
// CHECK-NEXT: br label [[WHILE_COND:%.*]]
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i32 [[TMP0]], 0
// CHECK-NEXT: [[TOBOOL_EXPVAL:%.*]] = call i1 @llvm.expect.i1(i1 [[TOBOOL]], i1 true)
// CHECK-NEXT: br i1 [[TOBOOL_EXPVAL]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
// CHECK: while.body:
// CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[TMP1]], 1
// CHECK-NEXT: store i32 [[INC]], ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: br label [[WHILE_COND]], !llvm.loop [[LOOP6:![0-9]+]]
// CHECK: while.end:
// CHECK-NEXT: ret void
//
void wl(int e){
while(e) [[likely]] ++e;
}
// CHECK-LABEL: @_Z2wui(
// CHECK-NEXT: entry:
// CHECK-NEXT: [[E_ADDR:%.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 [[E:%.*]], ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: br label [[WHILE_COND:%.*]]
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i32 [[TMP0]], 0
// CHECK-NEXT: [[TOBOOL_EXPVAL:%.*]] = call i1 @llvm.expect.i1(i1 [[TOBOOL]], i1 false)
// CHECK-NEXT: br i1 [[TOBOOL_EXPVAL]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
// CHECK: while.body:
// CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[TMP1]], 1
// CHECK-NEXT: store i32 [[INC]], ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: br label [[WHILE_COND]], !llvm.loop [[LOOP9:![0-9]+]]
// CHECK: while.end:
// CHECK-NEXT: ret void
//
void wu(int e){
while(e) [[unlikely]] ++e;
}
// CHECK-LABEL: @_Z15w_branch_elidedj(
// CHECK-NEXT: entry:
// CHECK-NEXT: [[E_ADDR:%.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 [[E:%.*]], ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: br label [[WHILE_BODY:%.*]]
// CHECK: while.body:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: [[INC:%.*]] = add i32 [[TMP0]], 1
// CHECK-NEXT: store i32 [[INC]], ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: br label [[WHILE_BODY]], !llvm.loop [[LOOP10:![0-9]+]]
//
void w_branch_elided(unsigned e){
// expected-warning@+2 {{attribute 'likely' has no effect when annotating an infinite loop}}
// expected-note@+1 {{annotating the infinite loop here}}
while(1) [[likely]] ++e;
}
// CHECK-LABEL: @_Z2flj(
// CHECK-NEXT: entry:
// CHECK-NEXT: [[E_ADDR:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 [[E:%.*]], ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr [[I]]) #[[ATTR4:[0-9]+]]
// CHECK-NEXT: store i32 0, ptr [[I]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[I]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[TMP1]], [[TMP2]]
// CHECK-NEXT: [[CMP_EXPVAL:%.*]] = call i1 @llvm.expect.i1(i1 [[CMP]], i1 true)
// CHECK-NEXT: br i1 [[CMP_EXPVAL]], label [[FOR_BODY:%.*]], label [[FOR_COND_CLEANUP:%.*]]
// CHECK: for.cond.cleanup:
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr [[I]]) #[[ATTR4]]
// CHECK-NEXT: br label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_INC:%.*]]
// CHECK: for.inc:
// CHECK-NEXT: [[TMP4:%.*]] = load i32, ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: [[INC:%.*]] = add i32 [[TMP4]], 1
// CHECK-NEXT: store i32 [[INC]], ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: br label [[FOR_COND]], !llvm.loop [[LOOP11:![0-9]+]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void fl(unsigned e)
{
for(int i = 0; i != e; ++e) [[likely]];
}
// CHECK-LABEL: @_Z2fui(
// CHECK-NEXT: entry:
// CHECK-NEXT: [[E_ADDR:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 [[E:%.*]], ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr [[I]]) #[[ATTR4]]
// CHECK-NEXT: store i32 0, ptr [[I]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[I]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[TMP1]], [[TMP2]]
// CHECK-NEXT: [[CMP_EXPVAL:%.*]] = call i1 @llvm.expect.i1(i1 [[CMP]], i1 false)
// CHECK-NEXT: br i1 [[CMP_EXPVAL]], label [[FOR_BODY:%.*]], label [[FOR_COND_CLEANUP:%.*]]
// CHECK: for.cond.cleanup:
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr [[I]]) #[[ATTR4]]
// CHECK-NEXT: br label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_INC:%.*]]
// CHECK: for.inc:
// CHECK-NEXT: [[TMP4:%.*]] = load i32, ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[TMP4]], 1
// CHECK-NEXT: store i32 [[INC]], ptr [[E_ADDR]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: br label [[FOR_COND]], !llvm.loop [[LOOP12:![0-9]+]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void fu(int e)
{
for(int i = 0; i != e; ++e) [[unlikely]];
}
// CHECK-LABEL: @_Z15f_branch_elidedv(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: br label [[FOR_COND]], !llvm.loop [[LOOP13:![0-9]+]]
//
void f_branch_elided()
{
for(;;) [[likely]];
}
// CHECK-LABEL: @_Z3frlOA4_i(
// CHECK-NEXT: entry:
// CHECK-NEXT: [[E_ADDR:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[__RANGE1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[__BEGIN1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[__END1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
// CHECK-NEXT: store ptr [[E:%.*]], ptr [[E_ADDR]], align 8, !tbaa [[TBAA14:![0-9]+]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[__RANGE1]]) #[[ATTR4]]
// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[E_ADDR]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: store ptr [[TMP1]], ptr [[__RANGE1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[__BEGIN1]]) #[[ATTR4]]
// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[__RANGE1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [4 x i32], ptr [[TMP3]], i64 0, i64 0
// CHECK-NEXT: store ptr [[ARRAYDECAY]], ptr [[__BEGIN1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[__END1]]) #[[ATTR4]]
// CHECK-NEXT: [[TMP5:%.*]] = load ptr, ptr [[__RANGE1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[ARRAYDECAY1:%.*]] = getelementptr inbounds [4 x i32], ptr [[TMP5]], i64 0, i64 0
// CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i32, ptr [[ARRAYDECAY1]], i64 4
// CHECK-NEXT: store ptr [[ADD_PTR]], ptr [[__END1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP6:%.*]] = load ptr, ptr [[__BEGIN1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[TMP7:%.*]] = load ptr, ptr [[__END1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[TMP6]], [[TMP7]]
// CHECK-NEXT: [[CMP_EXPVAL:%.*]] = call i1 @llvm.expect.i1(i1 [[CMP]], i1 true)
// CHECK-NEXT: br i1 [[CMP_EXPVAL]], label [[FOR_BODY:%.*]], label [[FOR_COND_CLEANUP:%.*]]
// CHECK: for.cond.cleanup:
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[__END1]]) #[[ATTR4]]
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[__BEGIN1]]) #[[ATTR4]]
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[__RANGE1]]) #[[ATTR4]]
// CHECK-NEXT: br label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr [[I]]) #[[ATTR4]]
// CHECK-NEXT: [[TMP12:%.*]] = load ptr, ptr [[__BEGIN1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[TMP13:%.*]] = load i32, ptr [[TMP12]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: store i32 [[TMP13]], ptr [[I]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr [[I]]) #[[ATTR4]]
// CHECK-NEXT: br label [[FOR_INC:%.*]]
// CHECK: for.inc:
// CHECK-NEXT: [[TMP15:%.*]] = load ptr, ptr [[__BEGIN1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds i32, ptr [[TMP15]], i32 1
// CHECK-NEXT: store ptr [[INCDEC_PTR]], ptr [[__BEGIN1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: br label [[FOR_COND]], !llvm.loop [[LOOP16:![0-9]+]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void frl(int (&&e) [4])
{
for(int i : e) [[likely]];
}
// CHECK-LABEL: @_Z3fruOA4_i(
// CHECK-NEXT: entry:
// CHECK-NEXT: [[E_ADDR:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[__RANGE1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[__BEGIN1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[__END1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
// CHECK-NEXT: store ptr [[E:%.*]], ptr [[E_ADDR]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[__RANGE1]]) #[[ATTR4]]
// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[E_ADDR]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: store ptr [[TMP1]], ptr [[__RANGE1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[__BEGIN1]]) #[[ATTR4]]
// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[__RANGE1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [4 x i32], ptr [[TMP3]], i64 0, i64 0
// CHECK-NEXT: store ptr [[ARRAYDECAY]], ptr [[__BEGIN1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[__END1]]) #[[ATTR4]]
// CHECK-NEXT: [[TMP5:%.*]] = load ptr, ptr [[__RANGE1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[ARRAYDECAY1:%.*]] = getelementptr inbounds [4 x i32], ptr [[TMP5]], i64 0, i64 0
// CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i32, ptr [[ARRAYDECAY1]], i64 4
// CHECK-NEXT: store ptr [[ADD_PTR]], ptr [[__END1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP6:%.*]] = load ptr, ptr [[__BEGIN1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[TMP7:%.*]] = load ptr, ptr [[__END1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[TMP6]], [[TMP7]]
// CHECK-NEXT: [[CMP_EXPVAL:%.*]] = call i1 @llvm.expect.i1(i1 [[CMP]], i1 false)
// CHECK-NEXT: br i1 [[CMP_EXPVAL]], label [[FOR_BODY:%.*]], label [[FOR_COND_CLEANUP:%.*]]
// CHECK: for.cond.cleanup:
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[__END1]]) #[[ATTR4]]
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[__BEGIN1]]) #[[ATTR4]]
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[__RANGE1]]) #[[ATTR4]]
// CHECK-NEXT: br label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr [[I]]) #[[ATTR4]]
// CHECK-NEXT: [[TMP12:%.*]] = load ptr, ptr [[__BEGIN1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[TMP13:%.*]] = load i32, ptr [[TMP12]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: store i32 [[TMP13]], ptr [[I]], align 4, !tbaa [[TBAA2]]
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr [[I]]) #[[ATTR4]]
// CHECK-NEXT: br label [[FOR_INC:%.*]]
// CHECK: for.inc:
// CHECK-NEXT: [[TMP15:%.*]] = load ptr, ptr [[__BEGIN1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds i32, ptr [[TMP15]], i32 1
// CHECK-NEXT: store ptr [[INCDEC_PTR]], ptr [[__BEGIN1]], align 8, !tbaa [[TBAA14]]
// CHECK-NEXT: br label [[FOR_COND]], !llvm.loop [[LOOP17:![0-9]+]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void fru(int (&&e) [4])
{
for(int i : e) [[unlikely]];
}
|
