uses-in-phi-nodes.ll
7.19 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
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
; RUN: opt -safepoint-ir-verifier-print-only -verify-safepoint-ir -S %s 2>&1 | FileCheck %s
define i8 addrspace(1)* @test.not.ok.0(i8 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK-LABEL: Verifying gc pointers in function: test.not.ok.0
bci_0:
br i1 undef, label %left, label %right
left:
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0)
br label %merge
right:
br label %merge
merge:
; CHECK: Illegal use of unrelocated value found!
; CHECK-NEXT: Def: %val = phi i8 addrspace(1)* [ %arg, %left ], [ %arg, %right ]
; CHECK-NEXT: Use: ret i8 addrspace(1)* %val
%val = phi i8 addrspace(1)* [ %arg, %left ], [ %arg, %right ]
ret i8 addrspace(1)* %val
}
define i8 addrspace(1)* @test.not.ok.1(i8 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK-LABEL: Verifying gc pointers in function: test.not.ok.1
bci_0:
br i1 undef, label %left, label %right
left:
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0)
br label %merge
right:
br label %merge
merge:
; CHECK: Illegal use of unrelocated value found!
; CHECK-NEXT: Def: %val = phi i8 addrspace(1)* [ %arg, %left ], [ null, %right ]
; CHECK-NEXT: Use: ret i8 addrspace(1)* %val
%val = phi i8 addrspace(1)* [ %arg, %left ], [ null, %right ]
ret i8 addrspace(1)* %val
}
define i8 addrspace(1)* @test.ok.0(i8 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK: No illegal uses found by SafepointIRVerifier in: test.ok.0
bci_0:
br i1 undef, label %left, label %right
left:
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0)
br label %merge
right:
br label %merge
merge:
%val = phi i8 addrspace(1)* [ null, %left ], [ null, %right]
ret i8 addrspace(1)* %val
}
define i8 addrspace(1)* @test.ok.1(i8 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK: No illegal uses found by SafepointIRVerifier in: test.ok.1
bci_0:
br i1 undef, label %left, label %right
left:
call void @not_statepoint()
br label %merge
right:
br label %merge
merge:
%val = phi i8 addrspace(1)* [ %arg, %left ], [ %arg, %right]
ret i8 addrspace(1)* %val
}
; It should be allowed to compare poisoned ptr with null.
define void @test.poisoned.cmp.ok(i8 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK-LABEL: Verifying gc pointers in function: test.poisoned.cmp.ok
bci_0:
br i1 undef, label %left, label %right
left:
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) ["gc-live"(i8 addrspace(1)* %arg)]
%arg.relocated = call i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %safepoint_token, i32 0, i32 0) ; arg, arg
br label %merge
right:
%safepoint_token2 = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) ["gc-live"(i8 addrspace(1)* %arg)]
br label %merge
merge:
; CHECK: No illegal uses found by SafepointIRVerifier in: test.poisoned.cmp.ok
%val.poisoned = phi i8 addrspace(1)* [ %arg.relocated, %left ], [ %arg, %right ]
%c = icmp eq i8 addrspace(1)* %val.poisoned, null
ret void
}
; It is illegal to compare poisoned ptr and relocated.
define void @test.poisoned.cmp.fail.0(i8 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK-LABEL: Verifying gc pointers in function: test.poisoned.cmp.fail.0
bci_0:
br i1 undef, label %left, label %right
left:
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) ["gc-live"(i8 addrspace(1)* %arg)]
%arg.relocated = call i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %safepoint_token, i32 0, i32 0) ; arg, arg
br label %merge
right:
%safepoint_token2 = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) ["gc-live"(i8 addrspace(1)* %arg), "deopt"(i32 -1, i32 0, i32 0, i32 0)]
%arg.relocated2 = call i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %safepoint_token2, i32 0, i32 0) ; arg, arg
br label %merge
merge:
; CHECK: Illegal use of unrelocated value found!
; CHECK-NEXT: Def: %val.poisoned = phi i8 addrspace(1)* [ %arg.relocated, %left ], [ %arg, %right ]
; CHECK-NEXT: Use: %c = icmp eq i8 addrspace(1)* %val.poisoned, %val
%val.poisoned = phi i8 addrspace(1)* [ %arg.relocated, %left ], [ %arg, %right ]
%val = phi i8 addrspace(1)* [ %arg.relocated, %left ], [ %arg.relocated2, %right ]
%c = icmp eq i8 addrspace(1)* %val.poisoned, %val
ret void
}
; It is illegal to compare poisoned ptr and unrelocated.
define void @test.poisoned.cmp.fail.1(i8 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK-LABEL: Verifying gc pointers in function: test.poisoned.cmp.fail.1
bci_0:
br i1 undef, label %left, label %right
left:
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) ["gc-live"(i8 addrspace(1)* %arg)]
%arg.relocated = call i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %safepoint_token, i32 0, i32 0) ; arg, arg
br label %merge
right:
%safepoint_token2 = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) ["gc-live"(i8 addrspace(1)* %arg), "deopt"(i32 -1, i32 0, i32 0, i32 0)]
%arg.relocated2 = call i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %safepoint_token2, i32 0, i32 0) ; arg, arg
br label %merge
merge:
; CHECK: Illegal use of unrelocated value found!
; CHECK-NEXT: Def: %val.poisoned = phi i8 addrspace(1)* [ %arg.relocated, %left ], [ %arg, %right ]
; CHECK-NEXT: Use: %c = icmp eq i8 addrspace(1)* %val.poisoned, %arg
%val.poisoned = phi i8 addrspace(1)* [ %arg.relocated, %left ], [ %arg, %right ]
%c = icmp eq i8 addrspace(1)* %val.poisoned, %arg
ret void
}
; It should be allowed to compare unrelocated phi with unrelocated value.
define void @test.unrelocated-phi.cmp.ok(i8 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK-LABEL: Verifying gc pointers in function: test.unrelocated-phi.cmp.ok
bci_0:
br i1 undef, label %left, label %right
left:
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0)
br label %merge
right:
br label %merge
merge:
; CHECK: No illegal uses found by SafepointIRVerifier in: test.unrelocated-phi.cmp.ok
%val.unrelocated = phi i8 addrspace(1)* [ %arg, %left ], [ null, %right ]
%c = icmp eq i8 addrspace(1)* %val.unrelocated, %arg
ret void
}
declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token, i32, i32)
declare void @not_statepoint()