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
|
; RUN: opt < %s -disable-output -passes='verify<cycles>,print<cycles>' 2>&1 | FileCheck %s -check-prefix=CHECK
define void @empty() {
; CHECK-LABEL: CycleInfo for function: empty
; CHECK-NOT: depth
ret void
}
define void @simple(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: simple
; CHECK: depth=1: entries(loop)
entry:
br label %loop
loop:
br i1 %arg, label %loop, label %exit
exit:
ret void
}
define void @two_latches(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: two_latches
; CHECK: depth=1: entries(loop) loop_next
entry:
br label %loop
loop:
br i1 %arg, label %loop, label %loop_next
loop_next:
br i1 %arg, label %exit, label %loop
exit:
ret void
}
define void @nested_simple(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: nested_simple
; CHECK: depth=1: entries(outer_header) outer_latch inner
; CHECK: depth=2: entries(inner)
entry:
br label %outer_header
outer_header:
br label %inner
inner:
br i1 %arg, label %inner, label %outer_latch
outer_latch:
br i1 %arg, label %outer_header, label %exit
exit:
ret void
}
define void @nested_outer_latch_in_inner_loop(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: nested_outer_latch_in_inner_loop
; CHECK: depth=1: entries(outer_header) inner_header inner_latch
; CHECK: depth=2: entries(inner_header) inner_latch
entry:
br label %outer_header
outer_header:
br label %inner_header
inner_header:
br i1 %arg, label %inner_latch, label %outer_header
inner_latch:
br i1 %arg, label %exit, label %inner_header
exit:
ret void
}
define void @sibling_loops(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: sibling_loops
; CHECK-DAG: depth=1: entries(left)
; CHECK-DAG: depth=1: entries(right)
entry:
br i1 %arg, label %left, label %right
left:
br i1 %arg, label %left, label %exit
right:
br i1 %arg, label %right, label %exit
exit:
ret void
}
define void @serial_loops(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: serial_loops
; CHECK-DAG: depth=1: entries(second)
; CHECK-DAG: depth=1: entries(first)
entry:
br label %first
first:
br i1 %arg, label %first, label %second
second:
br i1 %arg, label %second, label %exit
exit:
ret void
}
define void @nested_sibling_loops(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: nested_sibling_loops
; CHECK: depth=1: entries(outer_header) left right
; CHECK-DAG: depth=2: entries(right)
; CHECK-DAG: depth=2: entries(left)
entry:
br label %outer_header
outer_header:
br i1 %arg, label %left, label %right
left:
switch i32 undef, label %exit [ i32 0, label %left
i32 1, label %outer_header ]
right:
switch i32 undef, label %outer_header [ i32 0, label %exit
i32 1, label %right ]
exit:
ret void
}
define void @deeper_nest(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: deeper_nest
; CHECK: depth=1: entries(outer_header) outer_latch middle_header inner_header inner_latch
; CHECK: depth=2: entries(middle_header) inner_header inner_latch
; CHECK: depth=3: entries(inner_header) inner_latch
entry:
br label %outer_header
outer_header:
br label %middle_header
middle_header:
br label %inner_header
inner_header:
br i1 %arg, label %middle_header, label %inner_latch
inner_latch:
br i1 %arg, label %inner_header, label %outer_latch
outer_latch:
br i1 %arg, label %outer_header, label %exit
exit:
ret void
}
define void @irreducible_basic(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: irreducible_basic
; CHECK: depth=1: entries(right left)
entry:
br i1 %arg, label %left, label %right
left:
br i1 %arg, label %right, label %exit
right:
br i1 %arg, label %left, label %exit
exit:
ret void
}
define void @irreducible_mess(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: irreducible_mess
; CHECK: depth=1: entries(B A) D C
; CHECK: depth=2: entries(D C A)
; CHECK: depth=3: entries(C A)
entry:
br i1 %arg, label %A, label %B
A:
br i1 %arg, label %C, label %D
B:
br i1 %arg, label %C, label %D
C:
switch i32 undef, label %A [ i32 0, label %D
i32 1, label %exit ]
D:
switch i32 undef, label %B [ i32 0, label %C
i32 1, label %exit ]
exit:
ret void
}
define void @irreducible_into_simple_cycle(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: irreducible_into_simple_cycle
; CHECK: depth=1: entries(F C A) E D B
entry:
switch i32 undef, label %A [ i32 0, label %C
i32 1, label %F ]
A:
br label %B
B:
br label %C
C:
br label %D
D:
br i1 %arg, label %E, label %exit
E:
br label %F
F:
br i1 %arg, label %A, label %exit
exit:
ret void
}
define void @irreducible_mountain_bug(i1 %arg) {
; CHECK-LABEL: CycleInfo for function: irreducible_mountain_bug
; CHECK: depth=1: entries(while.cond)
; CHECK: depth=2: entries(cond.end61 cond.true49) while.body63 while.cond47
; CHECK: depth=3: entries(while.body63 cond.true49) while.cond47
entry:
br i1 %arg, label %if.end, label %if.then
if.end:
br i1 %arg, label %if.then7, label %if.else
if.then7:
br label %if.end16
if.else:
br label %if.end16
if.end16:
br i1 %arg, label %while.cond.preheader, label %if.then39
while.cond.preheader:
br label %while.cond
while.cond:
br i1 %arg, label %cond.true49, label %lor.rhs
cond.true49:
br i1 %arg, label %if.then69, label %while.body63
while.body63:
br i1 %arg, label %exit, label %while.cond47
while.cond47:
br i1 %arg, label %cond.true49, label %cond.end61
cond.end61:
br i1 %arg, label %while.body63, label %while.cond
if.then69:
br i1 %arg, label %exit, label %while.cond
lor.rhs:
br i1 %arg, label %cond.end61, label %while.end76
while.end76:
br label %exit
if.then39:
br i1 %arg, label %exit, label %if.end.i145
if.end.i145:
br i1 %arg, label %exit, label %if.end8.i149
if.end8.i149:
br label %exit
if.then:
br i1 %arg, label %exit, label %if.end.i
if.end.i:
br i1 %arg, label %exit, label %if.end8.i
if.end8.i:
br label %exit
exit:
ret void
}
|
