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
| ; RUN: opt -basicaa -print-memoryssa -verify-memoryssa -analyze < %s 2>&1 | FileCheck %s
; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s
%struct.hoge = type { i32, %struct.widget }
%struct.widget = type { i64 }
define hidden void @quux(%struct.hoge *%f) align 2 {
%tmp = getelementptr inbounds %struct.hoge, %struct.hoge* %f, i64 0, i32 1, i32 0
%tmp24 = getelementptr inbounds %struct.hoge, %struct.hoge* %f, i64 0, i32 1
%tmp25 = bitcast %struct.widget* %tmp24 to i64**
br label %bb26
bb26: ; preds = %bb77, %0
; CHECK: 3 = MemoryPhi({%0,liveOnEntry},{bb77,2})
; CHECK-NEXT: br i1 undef, label %bb68, label %bb77
br i1 undef, label %bb68, label %bb77
bb68: ; preds = %bb26
; CHECK: MemoryUse(liveOnEntry)
; CHECK-NEXT: %tmp69 = load i64, i64* null, align 8
%tmp69 = load i64, i64* null, align 8
; CHECK: 1 = MemoryDef(3)
; CHECK-NEXT: store i64 %tmp69, i64* %tmp, align 8
store i64 %tmp69, i64* %tmp, align 8
br label %bb77
bb77: ; preds = %bb68, %bb26
; CHECK: 2 = MemoryPhi({bb26,3},{bb68,1})
; CHECK: MemoryUse(2)
; CHECK-NEXT: %tmp78 = load i64*, i64** %tmp25, align 8
%tmp78 = load i64*, i64** %tmp25, align 8
%tmp79 = getelementptr inbounds i64, i64* %tmp78, i64 undef
br label %bb26
}
define hidden void @quux_no_null_opt(%struct.hoge *%f) align 2 #0 {
; CHECK-LABEL: quux_no_null_opt(
%tmp = getelementptr inbounds %struct.hoge, %struct.hoge* %f, i64 0, i32 1, i32 0
%tmp24 = getelementptr inbounds %struct.hoge, %struct.hoge* %f, i64 0, i32 1
%tmp25 = bitcast %struct.widget* %tmp24 to i64**
br label %bb26
bb26: ; preds = %bb77, %0
; CHECK: 3 = MemoryPhi({%0,liveOnEntry},{bb77,2})
; CHECK-NEXT: br i1 undef, label %bb68, label %bb77
br i1 undef, label %bb68, label %bb77
bb68: ; preds = %bb26
; CHECK: MemoryUse(3)
; CHECK-NEXT: %tmp69 = load i64, i64* null, align 8
%tmp69 = load i64, i64* null, align 8
; CHECK: 1 = MemoryDef(3)
; CHECK-NEXT: store i64 %tmp69, i64* %tmp, align 8
store i64 %tmp69, i64* %tmp, align 8
br label %bb77
bb77: ; preds = %bb68, %bb26
; CHECK: 2 = MemoryPhi({bb26,3},{bb68,1})
; CHECK: MemoryUse(2)
; CHECK-NEXT: %tmp78 = load i64*, i64** %tmp25, align 8
%tmp78 = load i64*, i64** %tmp25, align 8
%tmp79 = getelementptr inbounds i64, i64* %tmp78, i64 undef
br label %bb26
}
; CHECK-LABEL: define void @quux_skip
define void @quux_skip(%struct.hoge* noalias %f, i64* noalias %g) align 2 {
%tmp = getelementptr inbounds %struct.hoge, %struct.hoge* %f, i64 0, i32 1, i32 0
%tmp24 = getelementptr inbounds %struct.hoge, %struct.hoge* %f, i64 0, i32 1
%tmp25 = bitcast %struct.widget* %tmp24 to i64**
br label %bb26
bb26: ; preds = %bb77, %0
; CHECK: 3 = MemoryPhi({%0,liveOnEntry},{bb77,2})
; CHECK-NEXT: br i1 undef, label %bb68, label %bb77
br i1 undef, label %bb68, label %bb77
bb68: ; preds = %bb26
; CHECK: MemoryUse(3)
; CHECK-NEXT: %tmp69 = load i64, i64* %g, align 8
%tmp69 = load i64, i64* %g, align 8
; CHECK: 1 = MemoryDef(3)
; CHECK-NEXT: store i64 %tmp69, i64* %g, align 8
store i64 %tmp69, i64* %g, align 8
br label %bb77
bb77: ; preds = %bb68, %bb26
; CHECK: 2 = MemoryPhi({bb26,3},{bb68,1})
; CHECK: MemoryUse(liveOnEntry)
; CHECK-NEXT: %tmp78 = load i64*, i64** %tmp25, align 8
%tmp78 = load i64*, i64** %tmp25, align 8
br label %bb26
}
; CHECK-LABEL: define void @quux_dominated
define void @quux_dominated(%struct.hoge* noalias %f, i64* noalias %g) align 2 {
%tmp = getelementptr inbounds %struct.hoge, %struct.hoge* %f, i64 0, i32 1, i32 0
%tmp24 = getelementptr inbounds %struct.hoge, %struct.hoge* %f, i64 0, i32 1
%tmp25 = bitcast %struct.widget* %tmp24 to i64**
br label %bb26
bb26: ; preds = %bb77, %0
; CHECK: 3 = MemoryPhi({%0,liveOnEntry},{bb77,2})
; CHECK: MemoryUse(3)
; CHECK-NEXT: load i64*, i64** %tmp25, align 8
load i64*, i64** %tmp25, align 8
br i1 undef, label %bb68, label %bb77
bb68: ; preds = %bb26
; CHECK: MemoryUse(3)
; CHECK-NEXT: %tmp69 = load i64, i64* %g, align 8
%tmp69 = load i64, i64* %g, align 8
; CHECK: 1 = MemoryDef(3)
; CHECK-NEXT: store i64 %tmp69, i64* %g, align 8
store i64 %tmp69, i64* %g, align 8
br label %bb77
bb77: ; preds = %bb68, %bb26
; CHECK: 4 = MemoryPhi({bb26,3},{bb68,1})
; CHECK: 2 = MemoryDef(4)
; CHECK-NEXT: store i64* null, i64** %tmp25, align 8
store i64* null, i64** %tmp25, align 8
br label %bb26
}
; CHECK-LABEL: define void @quux_nodominate
define void @quux_nodominate(%struct.hoge* noalias %f, i64* noalias %g) align 2 {
%tmp = getelementptr inbounds %struct.hoge, %struct.hoge* %f, i64 0, i32 1, i32 0
%tmp24 = getelementptr inbounds %struct.hoge, %struct.hoge* %f, i64 0, i32 1
%tmp25 = bitcast %struct.widget* %tmp24 to i64**
br label %bb26
bb26: ; preds = %bb77, %0
; CHECK: 3 = MemoryPhi({%0,liveOnEntry},{bb77,2})
; CHECK: MemoryUse(liveOnEntry)
; CHECK-NEXT: load i64*, i64** %tmp25, align 8
load i64*, i64** %tmp25, align 8
br i1 undef, label %bb68, label %bb77
bb68: ; preds = %bb26
; CHECK: MemoryUse(3)
; CHECK-NEXT: %tmp69 = load i64, i64* %g, align 8
%tmp69 = load i64, i64* %g, align 8
; CHECK: 1 = MemoryDef(3)
; CHECK-NEXT: store i64 %tmp69, i64* %g, align 8
store i64 %tmp69, i64* %g, align 8
br label %bb77
bb77: ; preds = %bb68, %bb26
; CHECK: 2 = MemoryPhi({bb26,3},{bb68,1})
; CHECK-NEXT: br label %bb26
br label %bb26
}
attributes #0 = { "null-pointer-is-valid"="true" }
|