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
| ; Check that we don't crash on corner cases.
; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=1000 -unroll-threshold=1 -unroll-max-percent-threshold-boost=200 -o /dev/null
; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(unroll-full)' -unroll-max-iteration-count-to-analyze=1000 -unroll-threshold=1 -unroll-max-percent-threshold-boost=200 -o /dev/null
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
@known_constant = internal unnamed_addr constant [10 x i32] [i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1], align 16
define void @foo1() {
entry:
br label %for.body
for.body:
%phi = phi i64 [ 0, %entry ], [ %inc, %for.body ]
%idx = zext i32 undef to i64
%add.ptr = getelementptr inbounds i64, i64* null, i64 %idx
%inc = add nuw nsw i64 %phi, 1
%cmp = icmp ult i64 %inc, 999
br i1 %cmp, label %for.body, label %for.exit
for.exit:
ret void
}
define void @foo2() {
entry:
br label %for.body
for.body:
%phi = phi i64 [ 0, %entry ], [ %inc, %for.body ]
%x = getelementptr i32, <4 x i32*> undef, <4 x i32> <i32 1, i32 1, i32 1, i32 1>
%inc = add nuw nsw i64 %phi, 1
%cmp = icmp ult i64 %inc, 999
br i1 %cmp, label %for.body, label %for.exit
for.exit:
ret void
}
define void @cmp_undef() {
entry:
br label %for.body
for.body: ; preds = %for.inc, %entry
%iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.inc ]
%arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv.0
%x1 = load i32, i32* %arrayidx1, align 4
%cmp = icmp eq i32 %x1, undef
br i1 %cmp, label %if.then, label %for.inc
if.then: ; preds = %for.body
br label %for.inc
for.inc: ; preds = %for.body, %if.then
%iv.1 = add nuw nsw i64 %iv.0, 1
%exitcond = icmp eq i64 %iv.1, 10
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.inc
ret void
}
define void @switch() {
entry:
br label %for.body
for.body:
%iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.inc ]
%arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv.0
%x1 = load i32, i32* %arrayidx1, align 4
switch i32 %x1, label %l1 [
]
l1:
%x2 = add i32 %x1, 2
br label %for.inc
for.inc:
%iv.1 = add nuw nsw i64 %iv.0, 1
%exitcond = icmp eq i64 %iv.1, 10
br i1 %exitcond, label %for.end, label %for.body
for.end:
ret void
}
define <4 x i32> @vec_load() {
entry:
br label %for.body
for.body:
%phi = phi i64 [ 0, %entry ], [ %inc, %for.body ]
%vec_phi = phi <4 x i32> [ <i32 0, i32 0, i32 0, i32 0>, %entry ], [ %r, %for.body ]
%arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %phi
%bc = bitcast i32* %arrayidx to <4 x i32>*
%x = load <4 x i32>, < 4 x i32>* %bc, align 4
%r = add <4 x i32> %x, %vec_phi
%inc = add nuw nsw i64 %phi, 1
%cmp = icmp ult i64 %inc, 999
br i1 %cmp, label %for.body, label %for.exit
for.exit:
ret <4 x i32> %r
}
define void @ptrtoint_cast() optsize {
entry:
br label %for.body
for.body:
br i1 true, label %for.inc, label %if.then
if.then:
%arraydecay = getelementptr inbounds [1 x i32], [1 x i32]* null, i64 0, i64 0
%x = ptrtoint i32* %arraydecay to i64
br label %for.inc
for.inc:
br i1 false, label %for.body, label %for.cond.cleanup
for.cond.cleanup:
ret void
}
define void @ptrtoint_cast2() {
entry:
br i1 false, label %for.body.lr.ph, label %exit
for.body.lr.ph:
br label %for.body
for.body:
%iv = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
%offset = getelementptr inbounds float, float* null, i32 3
%bc = bitcast float* %offset to i64*
%inc = add nuw nsw i32 %iv, 1
br i1 false, label %for.body, label %exit
exit:
ret void
}
@i = external global i32, align 4
define void @folded_not_to_constantint() {
entry:
br label %for.body
for.body:
%iv = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
%m = phi i32* [ @i, %entry ], [ %m, %for.inc ]
br i1 undef, label %if.else, label %if.then
if.then:
unreachable
if.else:
%cmp = icmp ult i32* %m, null
br i1 %cmp, label %cond.false, label %for.inc
cond.false:
unreachable
for.inc:
%inc = add nuw nsw i32 %iv, 1
%cmp2 = icmp ult i32 %inc, 10
br i1 %cmp2, label %for.body, label %for.end
for.end:
ret void
}
define void @index_too_large() {
entry:
br label %for.body
for.body:
%iv = phi i64 [ -73631599, %entry ], [ %iv.next, %for.inc ]
br i1 undef, label %for.body2, label %for.inc
for.body2:
%idx = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv
%x = load i32, i32* %idx, align 1
br label %for.inc
for.inc:
%iv.next = add nsw i64 %iv, -1
br i1 undef, label %for.body, label %for.end
for.end:
ret void
}
define void @cmp_type_mismatch() {
entry:
br label %for.header
for.header:
br label %for.body
for.body:
%d = phi i32* [ null, %for.header ]
%cmp = icmp eq i32* %d, null
br i1 undef, label %for.end, label %for.header
for.end:
ret void
}
define void @load_type_mismatch() {
entry:
br label %for.body
for.body:
%iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.body ]
%arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv.0
%bc = bitcast i32* %arrayidx1 to i64*
%x1 = load i64, i64* %bc, align 4
%x2 = add i64 10, %x1
%iv.1 = add nuw nsw i64 %iv.0, 1
%exitcond = icmp eq i64 %iv.1, 10
br i1 %exitcond, label %for.end, label %for.body
for.end:
ret void
}
|