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
|
; 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-percent-dynamic-cost-saved-threshold=20 -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
}
|
