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
173
174
175
176
177
178
179
180
181
182
183
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=sink -S | FileCheck %s
declare i32 @f_load_global() nounwind willreturn readonly
declare i32 @f_load_global_throwable() willreturn readonly
declare i32 @f_load_global_may_not_return() nounwind readonly
declare i32 @f_load_arg(ptr) nounwind willreturn readonly argmemonly
declare void @f_store_global(i32) nounwind willreturn
declare void @f_store_arg(ptr) nounwind willreturn argmemonly
declare void @f_readonly_arg(ptr readonly, ptr) nounwind willreturn argmemonly
declare i32 @f_readnone(i32) nounwind willreturn readnone
@A = external global i32
@B = external global i32
; Sink readonly call if no stores are in the way.
;
define i32 @test_sink_no_stores(i1 %z) {
; CHECK-LABEL: @test_sink_no_stores(
; CHECK-NEXT: br i1 [[Z:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK: true:
; CHECK-NEXT: [[L:%.*]] = call i32 @f_load_global()
; CHECK-NEXT: ret i32 [[L]]
; CHECK: false:
; CHECK-NEXT: ret i32 0
;
%l = call i32 @f_load_global()
br i1 %z, label %true, label %false
true:
ret i32 %l
false:
ret i32 0
}
define i32 @test_throwable_no_stores(i1 %z) {
; CHECK-LABEL: @test_throwable_no_stores(
; CHECK-NEXT: [[L:%.*]] = call i32 @f_load_global_throwable()
; CHECK-NEXT: br i1 [[Z:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK: true:
; CHECK-NEXT: ret i32 [[L]]
; CHECK: false:
; CHECK-NEXT: ret i32 0
;
%l = call i32 @f_load_global_throwable()
br i1 %z, label %true, label %false
true:
ret i32 %l
false:
ret i32 0
}
define i32 @test_may_not_return_no_stores(i1 %z) {
; CHECK-LABEL: @test_may_not_return_no_stores(
; CHECK-NEXT: [[L:%.*]] = call i32 @f_load_global_may_not_return()
; CHECK-NEXT: br i1 [[Z:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK: true:
; CHECK-NEXT: ret i32 [[L]]
; CHECK: false:
; CHECK-NEXT: ret i32 0
;
%l = call i32 @f_load_global_may_not_return()
br i1 %z, label %true, label %false
true:
ret i32 %l
false:
ret i32 0
}
define i32 @test_sink_argmem_store(i1 %z) {
; CHECK-LABEL: @test_sink_argmem_store(
; CHECK-NEXT: store i32 0, ptr @B, align 4
; CHECK-NEXT: br i1 [[Z:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK: true:
; CHECK-NEXT: [[L:%.*]] = call i32 @f_load_arg(ptr @A)
; CHECK-NEXT: ret i32 [[L]]
; CHECK: false:
; CHECK-NEXT: ret i32 0
;
%l = call i32 @f_load_arg(ptr @A)
store i32 0, ptr @B
br i1 %z, label %true, label %false
true:
ret i32 %l
false:
ret i32 0
}
define i32 @test_sink_argmem_call(i1 %z) {
; CHECK-LABEL: @test_sink_argmem_call(
; CHECK-NEXT: call void @f_store_arg(ptr @B)
; CHECK-NEXT: br i1 [[Z:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK: true:
; CHECK-NEXT: [[L:%.*]] = call i32 @f_load_arg(ptr @A)
; CHECK-NEXT: ret i32 [[L]]
; CHECK: false:
; CHECK-NEXT: ret i32 0
;
%l = call i32 @f_load_arg(ptr @A)
call void @f_store_arg(ptr @B)
br i1 %z, label %true, label %false
true:
ret i32 %l
false:
ret i32 0
}
define i32 @test_sink_argmem_multiple(i1 %z) {
; CHECK-LABEL: @test_sink_argmem_multiple(
; CHECK-NEXT: call void @f_readonly_arg(ptr @A, ptr @B)
; CHECK-NEXT: br i1 [[Z:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK: true:
; CHECK-NEXT: [[L:%.*]] = call i32 @f_load_arg(ptr @A)
; CHECK-NEXT: ret i32 [[L]]
; CHECK: false:
; CHECK-NEXT: ret i32 0
;
%l = call i32 @f_load_arg(ptr @A)
call void @f_readonly_arg(ptr @A, ptr @B)
br i1 %z, label %true, label %false
true:
ret i32 %l
false:
ret i32 0
}
; But don't sink if there is a store.
define i32 @test_nosink_store(i1 %z) {
; CHECK-LABEL: @test_nosink_store(
; CHECK-NEXT: [[L:%.*]] = call i32 @f_load_global()
; CHECK-NEXT: store i32 0, ptr @A, align 4
; CHECK-NEXT: br i1 [[Z:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK: true:
; CHECK-NEXT: ret i32 [[L]]
; CHECK: false:
; CHECK-NEXT: ret i32 0
;
%l = call i32 @f_load_global()
store i32 0, ptr @A
br i1 %z, label %true, label %false
true:
ret i32 %l
false:
ret i32 0
}
define i32 @test_nosink_call(i1 %z) {
; CHECK-LABEL: @test_nosink_call(
; CHECK-NEXT: [[L:%.*]] = call i32 @f_load_global()
; CHECK-NEXT: call void @f_store_global(i32 0)
; CHECK-NEXT: br i1 [[Z:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK: true:
; CHECK-NEXT: ret i32 [[L]]
; CHECK: false:
; CHECK-NEXT: ret i32 0
;
%l = call i32 @f_load_global()
call void @f_store_global(i32 0)
br i1 %z, label %true, label %false
true:
ret i32 %l
false:
ret i32 0
}
; readnone calls are sunk across stores.
define i32 @test_sink_readnone(i1 %z) {
; CHECK-LABEL: @test_sink_readnone(
; CHECK-NEXT: store i32 0, ptr @A, align 4
; CHECK-NEXT: br i1 [[Z:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK: true:
; CHECK-NEXT: [[L:%.*]] = call i32 @f_readnone(i32 0)
; CHECK-NEXT: ret i32 [[L]]
; CHECK: false:
; CHECK-NEXT: ret i32 0
;
%l = call i32 @f_readnone(i32 0)
store i32 0, ptr @A
br i1 %z, label %true, label %false
true:
ret i32 %l
false:
ret i32 0
}
|
