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
| ; RUN: opt < %s -jump-threading -disable-output
%struct.ham = type { i8, i8, i16, i32 }
%struct.zot = type { i32 (...)** }
%struct.quux.0 = type { %struct.wombat }
%struct.wombat = type { %struct.zot }
@global = external global %struct.ham*, align 8
@global.1 = external constant i8*
declare i32 @wombat.2()
define void @blam() {
bb:
%tmp = load i32, i32* undef
%tmp1 = icmp eq i32 %tmp, 0
br i1 %tmp1, label %bb11, label %bb2
bb2:
%tmp3 = tail call i32 @wombat.2()
switch i32 %tmp3, label %bb4 [
i32 0, label %bb5
i32 1, label %bb7
i32 2, label %bb7
i32 3, label %bb11
]
bb4:
br label %bb7
bb5:
%tmp6 = tail call i32 @wombat.2()
br label %bb7
bb7:
%tmp8 = phi i32 [ 0, %bb5 ], [ 1, %bb4 ], [ 2, %bb2 ], [ 2, %bb2 ]
%tmp9 = icmp eq i32 %tmp8, 0
br i1 %tmp9, label %bb11, label %bb10
bb10:
ret void
bb11:
ret void
}
define void @spam(%struct.ham* %arg) {
bb:
%tmp = load i8, i8* undef, align 8
switch i8 %tmp, label %bb11 [
i8 1, label %bb11
i8 2, label %bb11
i8 3, label %bb1
i8 4, label %bb1
]
bb1:
br label %bb2
bb2:
%tmp3 = phi i32 [ 0, %bb1 ], [ %tmp3, %bb8 ]
br label %bb4
bb4:
%tmp5 = load i8, i8* undef, align 8
switch i8 %tmp5, label %bb11 [
i8 0, label %bb11
i8 1, label %bb10
i8 2, label %bb10
i8 3, label %bb6
i8 4, label %bb6
]
bb6:
br label %bb7
bb7:
br i1 undef, label %bb8, label %bb10
bb8:
%tmp9 = icmp eq %struct.ham* undef, %arg
br i1 %tmp9, label %bb10, label %bb2
bb10:
switch i32 %tmp3, label %bb4 [
i32 0, label %bb14
i32 1, label %bb11
i32 2, label %bb12
]
bb11:
unreachable
bb12:
%tmp13 = load %struct.ham*, %struct.ham** undef
br label %bb14
bb14:
%tmp15 = phi %struct.ham* [ %tmp13, %bb12 ], [ null, %bb10 ]
br label %bb16
bb16:
%tmp17 = load i8, i8* undef, align 8
switch i8 %tmp17, label %bb11 [
i8 0, label %bb11
i8 11, label %bb18
i8 12, label %bb18
]
bb18:
br label %bb19
bb19:
br label %bb20
bb20:
%tmp21 = load %struct.ham*, %struct.ham** undef
switch i8 undef, label %bb22 [
i8 0, label %bb4
i8 11, label %bb10
i8 12, label %bb10
]
bb22:
br label %bb23
bb23:
%tmp24 = icmp eq %struct.ham* %tmp21, null
br i1 %tmp24, label %bb35, label %bb25
bb25:
%tmp26 = icmp eq %struct.ham* %tmp15, null
br i1 %tmp26, label %bb34, label %bb27
bb27:
%tmp28 = load %struct.ham*, %struct.ham** undef
%tmp29 = icmp eq %struct.ham* %tmp28, %tmp21
br i1 %tmp29, label %bb35, label %bb30
bb30:
br label %bb31
bb31:
%tmp32 = load i8, i8* undef, align 8
%tmp33 = icmp eq i8 %tmp32, 0
br i1 %tmp33, label %bb31, label %bb34
bb34:
br label %bb35
bb35:
%tmp36 = phi i1 [ true, %bb34 ], [ false, %bb23 ], [ true, %bb27 ]
br label %bb37
bb37:
%tmp38 = icmp eq %struct.ham* %tmp15, null
br i1 %tmp38, label %bb39, label %bb41
bb39:
%tmp40 = load %struct.ham*, %struct.ham** @global
br label %bb41
bb41:
%tmp42 = select i1 %tmp36, %struct.ham* undef, %struct.ham* undef
ret void
}
declare i32 @foo(...)
define void @zot() align 2 personality i8* bitcast (i32 (...)* @foo to i8*) {
bb:
invoke void @bar()
to label %bb1 unwind label %bb3
bb1:
invoke void @bar()
to label %bb2 unwind label %bb4
bb2:
invoke void @bar()
to label %bb6 unwind label %bb17
bb3:
%tmp = landingpad { i8*, i32 }
catch i8* bitcast (i8** @global.1 to i8*)
catch i8* null
unreachable
bb4:
%tmp5 = landingpad { i8*, i32 }
catch i8* bitcast (i8** @global.1 to i8*)
catch i8* null
unreachable
bb6:
invoke void @bar()
to label %bb7 unwind label %bb19
bb7:
invoke void @bar()
to label %bb10 unwind label %bb8
bb8:
%tmp9 = landingpad { i8*, i32 }
cleanup
catch i8* bitcast (i8** @global.1 to i8*)
catch i8* null
unreachable
bb10:
%tmp11 = load i32 (%struct.zot*)*, i32 (%struct.zot*)** undef, align 8
%tmp12 = invoke i32 %tmp11(%struct.zot* nonnull undef)
to label %bb13 unwind label %bb21
bb13:
invoke void @bar()
to label %bb14 unwind label %bb23
bb14:
%tmp15 = load i32 (%struct.zot*)*, i32 (%struct.zot*)** undef, align 8
%tmp16 = invoke i32 %tmp15(%struct.zot* nonnull undef)
to label %bb26 unwind label %bb23
bb17:
%tmp18 = landingpad { i8*, i32 }
catch i8* bitcast (i8** @global.1 to i8*)
catch i8* null
unreachable
bb19:
%tmp20 = landingpad { i8*, i32 }
catch i8* bitcast (i8** @global.1 to i8*)
catch i8* null
unreachable
bb21:
%tmp22 = landingpad { i8*, i32 }
catch i8* bitcast (i8** @global.1 to i8*)
catch i8* null
unreachable
bb23:
%tmp24 = phi %struct.quux.0* [ null, %bb26 ], [ null, %bb14 ], [ undef, %bb13 ]
%tmp25 = landingpad { i8*, i32 }
catch i8* bitcast (i8** @global.1 to i8*)
catch i8* null
br label %bb30
bb26:
%tmp27 = load i32 (%struct.zot*)*, i32 (%struct.zot*)** undef, align 8
%tmp28 = invoke i32 %tmp27(%struct.zot* nonnull undef)
to label %bb29 unwind label %bb23
bb29:
unreachable
bb30:
%tmp31 = icmp eq %struct.quux.0* %tmp24, null
br i1 %tmp31, label %bb32, label %bb29
bb32:
unreachable
}
declare void @bar()
|