argmemonly.ll
5.24 KB
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
; RUN: opt -basic-aa -print-alias-sets -S -o - < %s 2>&1 | FileCheck %s
@s = global i8 1, align 1
@d = global i8 2, align 1
; CHECK: Alias sets for function 'test_alloca_argmemonly':
; CHECK-NEXT: Alias Set Tracker: 2 alias sets for 3 pointer values.
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod Pointers: (i8* %a, LocationSize::precise(1))
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 2] may alias, Mod/Ref Pointers: (i8* %d, unknown), (i8* %s, unknown)
define void @test_alloca_argmemonly(i8* %s, i8* %d) {
entry:
%a = alloca i8, align 1
store i8 1, i8* %a, align 1
call void @my_memcpy(i8* %d, i8* %s, i64 1)
ret void
}
; CHECK: Alias sets for function 'test_readonly_arg'
; CHECK-NEXT: Alias Set Tracker: 2 alias sets for 2 pointer values.
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod Pointers: (i8* %d, unknown)
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Ref Pointers: (i8* %s, unknown)
define i8 @test_readonly_arg(i8* noalias %s, i8* noalias %d) {
entry:
call void @my_memcpy(i8* %d, i8* %s, i64 1)
%ret = load i8, i8* %s
ret i8 %ret
}
; CHECK: Alias sets for function 'test_noalias_argmemonly':
; CHECK-NEXT: Alias Set Tracker: 2 alias sets for 3 pointer values.
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod Pointers: (i8* %a, LocationSize::precise(1))
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 2] may alias, Mod/Ref Pointers: (i8* %d, unknown), (i8* %s, unknown)
define void @test_noalias_argmemonly(i8* noalias %a, i8* %s, i8* %d) {
entry:
store i8 1, i8* %a, align 1
call void @my_memmove(i8* %d, i8* %s, i64 1)
ret void
}
; CHECK: Alias sets for function 'test5':
; CHECK-NEXT: Alias Set Tracker: 2 alias sets for 2 pointer values.
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod/Ref Pointers: (i8* %a, unknown)
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod Pointers: (i8* %b, unknown)
define void @test5(i8* noalias %a, i8* noalias %b) {
entry:
store i8 1, i8* %a, align 1
call void @my_memcpy(i8* %b, i8* %a, i64 1)
store i8 1, i8* %b, align 1
ret void
}
; CHECK: Alias sets for function 'test_argcollapse':
; CHECK-NEXT: Alias Set Tracker: 2 alias sets for 2 pointer values.
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod/Ref Pointers: (i8* %a, unknown)
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod/Ref Pointers: (i8* %b, unknown)
define void @test_argcollapse(i8* noalias %a, i8* noalias %b) {
entry:
store i8 1, i8* %a, align 1
call void @my_memmove(i8* %b, i8* %a, i64 1)
store i8 1, i8* %b, align 1
ret void
}
; CHECK: Alias sets for function 'test_memcpy1':
; CHECK-NEXT: Alias Set Tracker: 2 alias sets for 2 pointer values.
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod/Ref Pointers: (i8* %b, unknown)
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod/Ref Pointers: (i8* %a, unknown)
define void @test_memcpy1(i8* noalias %a, i8* noalias %b) {
entry:
call void @my_memcpy(i8* %b, i8* %a, i64 1)
call void @my_memcpy(i8* %a, i8* %b, i64 1)
ret void
}
; CHECK: Alias sets for function 'test_memset1':
; CHECK-NEXT: Alias Set Tracker: 1 alias sets for 1 pointer values.
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod Pointers: (i8* %a, unknown)
define void @test_memset1() {
entry:
%a = alloca i8, align 1
call void @my_memset(i8* %a, i8 0, i64 1)
ret void
}
; CHECK: Alias sets for function 'test_memset2':
; CHECK-NEXT: Alias Set Tracker: 1 alias sets for 1 pointer values.
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod Pointers: (i8* %a, unknown)
define void @test_memset2(i8* %a) {
entry:
call void @my_memset(i8* %a, i8 0, i64 1)
ret void
}
; CHECK: Alias sets for function 'test_memset3':
; CHECK-NEXT: Alias Set Tracker: 1 alias sets for 2 pointer values.
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 2] may alias, Mod Pointers: (i8* %a, unknown), (i8* %b, unknown)
define void @test_memset3(i8* %a, i8* %b) {
entry:
call void @my_memset(i8* %a, i8 0, i64 1)
call void @my_memset(i8* %b, i8 0, i64 1)
ret void
}
;; PICKUP HERE
; CHECK: Alias sets for function 'test_memset4':
; CHECK-NEXT: Alias Set Tracker: 2 alias sets for 2 pointer values.
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod Pointers: (i8* %a, unknown)
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Mod Pointers: (i8* %b, unknown)
define void @test_memset4(i8* noalias %a, i8* noalias %b) {
entry:
call void @my_memset(i8* %a, i8 0, i64 1)
call void @my_memset(i8* %b, i8 0, i64 1)
ret void
}
declare void @my_memset(i8* nocapture writeonly, i8, i64) argmemonly
declare void @my_memcpy(i8* nocapture writeonly, i8* nocapture readonly, i64) argmemonly
declare void @my_memmove(i8* nocapture, i8* nocapture readonly, i64) argmemonly
; CHECK: Alias sets for function 'test_attribute_intersect':
; CHECK-NEXT: Alias Set Tracker: 1 alias sets for 1 pointer values.
; CHECK-NEXT: AliasSet[0x{{[0-9a-f]+}}, 1] must alias, Ref Pointers: (i8* %a, LocationSize::precise(1))
define i8 @test_attribute_intersect(i8* noalias %a) {
entry:
;; This call is effectively readnone since the argument is readonly
;; and the function is declared writeonly.
call void @attribute_intersect(i8* %a)
%val = load i8, i8* %a
ret i8 %val
}
declare void @attribute_intersect(i8* readonly) argmemonly writeonly