deref-pointers.ll
5.05 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
; RUN: opt -S -rewrite-statepoints-for-gc < %s | FileCheck %s
; RUN: opt -S -passes=rewrite-statepoints-for-gc < %s | FileCheck %s
; CHECK: declare i8 addrspace(1)* @some_function_ret_deref()
; CHECK: define i8 addrspace(1)* @test_deref_arg(i8 addrspace(1)* %a)
; CHECK: define i8 addrspace(1)* @test_deref_or_null_arg(i8 addrspace(1)* %a)
; CHECK: define i8 addrspace(1)* @test_noalias_arg(i8 addrspace(1)* %a)
declare void @foo()
declare i8 addrspace(1)* @some_function() "gc-leaf-function"
declare void @some_function_consumer(i8 addrspace(1)*) "gc-leaf-function"
declare dereferenceable(4) i8 addrspace(1)* @some_function_ret_deref() "gc-leaf-function"
declare noalias i8 addrspace(1)* @some_function_ret_noalias() "gc-leaf-function"
define i8 addrspace(1)* @test_deref_arg(i8 addrspace(1)* dereferenceable(4) %a) gc "statepoint-example" {
entry:
call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i8 addrspace(1)* %a
}
define i8 addrspace(1)* @test_deref_or_null_arg(i8 addrspace(1)* dereferenceable_or_null(4) %a) gc "statepoint-example" {
entry:
call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i8 addrspace(1)* %a
}
define i8 addrspace(1)* @test_noalias_arg(i8 addrspace(1)* noalias %a) gc "statepoint-example" {
entry:
call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i8 addrspace(1)* %a
}
define i8 addrspace(1)* @test_deref_retval() gc "statepoint-example" {
; CHECK-LABEL: @test_deref_retval(
; CHECK: %a = call i8 addrspace(1)* @some_function()
entry:
%a = call dereferenceable(4) i8 addrspace(1)* @some_function()
call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i8 addrspace(1)* %a
}
define i8 addrspace(1)* @test_deref_or_null_retval() gc "statepoint-example" {
; CHECK-LABEL: @test_deref_or_null_retval(
; CHECK: %a = call i8 addrspace(1)* @some_function()
entry:
%a = call dereferenceable_or_null(4) i8 addrspace(1)* @some_function()
call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i8 addrspace(1)* %a
}
define i8 addrspace(1)* @test_noalias_retval() gc "statepoint-example" {
; CHECK-LABEL: @test_noalias_retval(
; CHECK: %a = call i8 addrspace(1)* @some_function()
entry:
%a = call noalias i8 addrspace(1)* @some_function()
call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i8 addrspace(1)* %a
}
define i8 @test_md(i8 addrspace(1)* %ptr) gc "statepoint-example" {
; CHECK-LABEL: @test_md(
; CHECK: %tmp = load i8, i8 addrspace(1)* %ptr, align 1, !tbaa [[TAG_old:!.*]]
entry:
%tmp = load i8, i8 addrspace(1)* %ptr, !tbaa !0
call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i8 %tmp
}
; Same as test_md() above, but with new-format TBAA metadata.
define i8 @test_md_new(i8 addrspace(1)* %ptr) gc "statepoint-example" {
; CHECK-LABEL: @test_md_new(
; CHECK: %tmp = load i8, i8 addrspace(1)* %ptr, align 1, !tbaa [[TAG_new:!.*]]
entry:
%tmp = load i8, i8 addrspace(1)* %ptr, !tbaa !4
call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i8 %tmp
}
define i8 addrspace(1)* @test_decl_only_attribute(i8 addrspace(1)* %ptr) gc "statepoint-example" {
; CHECK-LABEL: @test_decl_only_attribute(
; No change here, but the prototype of some_function_ret_deref should have changed.
; CHECK: call i8 addrspace(1)* @some_function_ret_deref()
entry:
%a = call i8 addrspace(1)* @some_function_ret_deref()
call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i8 addrspace(1)* %a
}
define i8 addrspace(1)* @test_decl_only_noalias(i8 addrspace(1)* %ptr) gc "statepoint-example" {
; CHECK-LABEL: @test_decl_only_noalias(
; No change here, but the prototype of some_function_ret_noalias should have changed.
; CHECK: call i8 addrspace(1)* @some_function_ret_noalias()
entry:
%a = call i8 addrspace(1)* @some_function_ret_noalias()
call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i8 addrspace(1)* %a
}
define i8 addrspace(1)* @test_callsite_arg_attribute(i8 addrspace(1)* %ptr) gc "statepoint-example" {
; CHECK-LABEL: @test_callsite_arg_attribute(
; CHECK: call void @some_function_consumer(i8 addrspace(1)* %ptr)
entry:
call void @some_function_consumer(i8 addrspace(1)* dereferenceable(4) noalias %ptr)
call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i8 addrspace(1)* %ptr
}
!0 = !{!1, !2, i64 0, i64 1} ; TAG_old
!1 = !{!"type_base_old", !2, i64 0}
!2 = !{!"type_access_old", !3}
!3 = !{!"root"}
!4 = !{!5, !6, i64 0, i64 1, i64 1} ; TAG_new
!5 = !{!3, i64 1, !"type_base_new", !6, i64 0, i64 1}
!6 = !{!3, i64 1, !"type_access_new"}
; CHECK-DAG: [[ROOT:!.*]] = !{!"root"}
; CHECK-DAG: [[TYPE_access_old:!.*]] = !{!"type_access_old", [[ROOT]]}
; CHECK-DAG: [[TYPE_base_old:!.*]] = !{!"type_base_old", [[TYPE_access_old]], i64 0}
; CHECK-DAG: [[TAG_old]] = !{[[TYPE_base_old]], [[TYPE_access_old]], i64 0}
; CHECK-DAG: [[TYPE_access_new:!.*]] = !{[[ROOT]], i64 1, !"type_access_new"}
; CHECK-DAG: [[TYPE_base_new:!.*]] = !{[[ROOT]], i64 1, !"type_base_new", [[TYPE_access_new]], i64 0, i64 1}
; CHECK-DAG: [[TAG_new]] = !{[[TYPE_base_new]], [[TYPE_access_new]], i64 0, i64 1}