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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals --version 2
; RUN: opt -passes=instcombine -S < %s | FileCheck %s
target datalayout = "e-m:e-p:64:64:64-i64:64-f80:128-n8:16:32:64-S128"
; Check that nonnull metadata is not propagated from dominating load.
define void @combine_metadata_dominance1(ptr %p) {
; CHECK-LABEL: define void @combine_metadata_dominance1
; CHECK-SAME: (ptr [[P:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8
; CHECK-NEXT: store i32 0, ptr [[A]], align 4
; CHECK-NEXT: ret void
;
entry:
%a = load ptr, ptr %p, !nonnull !0
br label %bb1
bb1:
%b = load ptr, ptr %p
store i32 0, ptr %a
store i32 0, ptr %b
ret void
}
declare i32 @use(ptr, i32) readonly
; Check that nonnull from the dominated load does not get propagated.
; There are some cases where it would be safe to keep it.
define void @combine_metadata_dominance2(ptr %p, i1 %c1) {
; CHECK-LABEL: define void @combine_metadata_dominance2
; CHECK-SAME: (ptr [[P:%.*]], i1 [[C1:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C1]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8
; CHECK-NEXT: store i32 0, ptr [[A]], align 4
; CHECK-NEXT: ret void
; CHECK: bb2:
; CHECK-NEXT: ret void
;
entry:
%a = load ptr, ptr %p
br i1 %c1, label %bb1, label %bb2
bb1:
%b = load ptr, ptr %p, !nonnull !0
store i32 0, ptr %a
store i32 0, ptr %b
ret void
bb2:
ret void
}
define void @combine_metadata_dominance3(ptr %p) {
; CHECK-LABEL: define void @combine_metadata_dominance3
; CHECK-SAME: (ptr [[P:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8, !nonnull !0, !noundef !0
; CHECK-NEXT: store i32 0, ptr [[A]], align 4
; CHECK-NEXT: ret void
;
entry:
%a = load ptr, ptr %p, !nonnull !0, !noundef !1
br label %bb1
bb1:
%b = load ptr, ptr %p
store i32 0, ptr %a
store i32 0, ptr %b
ret void
}
define void @combine_metadata_dominance4(ptr %p) {
; CHECK-LABEL: define void @combine_metadata_dominance4
; CHECK-SAME: (ptr [[P:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8
; CHECK-NEXT: store i32 0, ptr [[A]], align 4
; CHECK-NEXT: ret void
;
entry:
%a = load ptr, ptr %p, !nonnull !0
br label %bb1
bb1:
%b = load ptr, ptr %p, !noundef !1
store i32 0, ptr %a
store i32 0, ptr %b
ret void
}
define void @combine_metadata_dominance5(ptr %p) {
; CHECK-LABEL: define void @combine_metadata_dominance5
; CHECK-SAME: (ptr [[P:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8, !align !1
; CHECK-NEXT: store i32 0, ptr [[A]], align 4
; CHECK-NEXT: ret void
;
entry:
%a = load ptr, ptr %p, !align !2
br label %bb1
bb1:
%b = load ptr, ptr %p, !align !3
store i32 0, ptr %a
store i32 0, ptr %b
ret void
}
define void @combine_metadata_dominance6(ptr %p) {
; CHECK-LABEL: define void @combine_metadata_dominance6
; CHECK-SAME: (ptr [[P:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8, !align !2, !noundef !0
; CHECK-NEXT: store i32 0, ptr [[A]], align 8
; CHECK-NEXT: ret void
;
entry:
%a = load ptr, ptr %p, !align !2, !noundef !1
br label %bb1
bb1:
%b = load ptr, ptr %p, !align !3
store i32 0, ptr %a
store i32 0, ptr %b
ret void
}
!0 = !{}
!1 = !{}
!2 = !{i64 8}
!3 = !{i64 4}
;.
; CHECK: attributes #[[ATTR0:[0-9]+]] = { memory(read) }
;.
; CHECK: [[META0:![0-9]+]] = !{}
; CHECK: [[META1:![0-9]+]] = !{i64 4}
; CHECK: [[META2:![0-9]+]] = !{i64 8}
;.
|
