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
184
185
186
187
188
189
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; FIXME: These were broken when swapping to MSSA(?). So currently XFAIL:ed.
; XFAIL: *
; RUN: opt < %s -aa-pipeline=basic-aa -passes=dse -S | FileCheck %s
target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) nounwind
declare void @llvm.memset.element.unordered.atomic.p0.i64(ptr nocapture, i8, i64, i32) nounwind
declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind
declare void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i32) nounwind
; PR8701
;; Fully dead overwrite of memcpy.
define void @test15(ptr %P, ptr %Q) nounwind ssp {
; CHECK-LABEL: @test15(
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr [[P:%.*]], ptr [[Q:%.*]], i64 12, i1 false)
; CHECK-NEXT: ret void
;
tail call void @llvm.memcpy.p0.p0.i64(ptr %P, ptr %Q, i64 12, i1 false)
tail call void @llvm.memcpy.p0.p0.i64(ptr %P, ptr %Q, i64 12, i1 false)
ret void
}
;; Fully dead overwrite of memcpy.
define void @test15_atomic(ptr %P, ptr %Q) nounwind ssp {
; CHECK-LABEL: @test15_atomic(
; CHECK-NEXT: tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 [[P:%.*]], ptr align 1 [[Q:%.*]], i64 12, i32 1)
; CHECK-NEXT: ret void
;
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i32 1)
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i32 1)
ret void
}
;; Fully dead overwrite of memcpy.
define void @test15_atomic_weaker(ptr %P, ptr %Q) nounwind ssp {
; CHECK-LABEL: @test15_atomic_weaker(
; CHECK-NEXT: tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 [[P:%.*]], ptr align 1 [[Q:%.*]], i64 12, i32 1)
; CHECK-NEXT: ret void
;
tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i1 false)
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i32 1)
ret void
}
;; Fully dead overwrite of memcpy.
define void @test15_atomic_weaker_2(ptr %P, ptr %Q) nounwind ssp {
; CHECK-LABEL: @test15_atomic_weaker_2(
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 [[P:%.*]], ptr align 1 [[Q:%.*]], i64 12, i1 false)
; CHECK-NEXT: ret void
;
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i32 1)
tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i1 false)
ret void
}
;; Full overwrite of smaller memcpy.
define void @test16(ptr %P, ptr %Q) nounwind ssp {
; CHECK-LABEL: @test16(
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr [[P:%.*]], ptr [[Q:%.*]], i64 12, i1 false)
; CHECK-NEXT: ret void
;
tail call void @llvm.memcpy.p0.p0.i64(ptr %P, ptr %Q, i64 8, i1 false)
tail call void @llvm.memcpy.p0.p0.i64(ptr %P, ptr %Q, i64 12, i1 false)
ret void
}
;; Full overwrite of smaller memcpy.
define void @test16_atomic(ptr %P, ptr %Q) nounwind ssp {
; CHECK-LABEL: @test16_atomic(
; CHECK-NEXT: tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 [[P:%.*]], ptr align 1 [[Q:%.*]], i64 12, i32 1)
; CHECK-NEXT: ret void
;
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 8, i32 1)
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i32 1)
ret void
}
;; Full overwrite of smaller memory where overwrite has stronger atomicity
define void @test16_atomic_weaker(ptr %P, ptr %Q) nounwind ssp {
; CHECK-LABEL: @test16_atomic_weaker(
; CHECK-NEXT: tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 [[P:%.*]], ptr align 1 [[Q:%.*]], i64 12, i32 1)
; CHECK-NEXT: ret void
;
tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 8, i1 false)
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i32 1)
ret void
}
;; Full overwrite of smaller memory where overwrite has weaker atomicity.
define void @test16_atomic_weaker_2(ptr %P, ptr %Q) nounwind ssp {
; CHECK-LABEL: @test16_atomic_weaker_2(
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 [[P:%.*]], ptr align 1 [[Q:%.*]], i64 12, i1 false)
; CHECK-NEXT: ret void
;
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 8, i32 1)
tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i1 false)
ret void
}
;; Overwrite of memset by memcpy.
define void @test17(ptr %P, ptr noalias %Q) nounwind ssp {
; CHECK-LABEL: @test17(
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr [[P:%.*]], ptr [[Q:%.*]], i64 12, i1 false)
; CHECK-NEXT: ret void
;
tail call void @llvm.memset.p0.i64(ptr %P, i8 42, i64 8, i1 false)
tail call void @llvm.memcpy.p0.p0.i64(ptr %P, ptr %Q, i64 12, i1 false)
ret void
}
;; Overwrite of memset by memcpy.
define void @test17_atomic(ptr %P, ptr noalias %Q) nounwind ssp {
; CHECK-LABEL: @test17_atomic(
; CHECK-NEXT: tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 [[P:%.*]], ptr align 1 [[Q:%.*]], i64 12, i32 1)
; CHECK-NEXT: ret void
;
tail call void @llvm.memset.element.unordered.atomic.p0.i64(ptr align 1 %P, i8 42, i64 8, i32 1)
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i32 1)
ret void
}
;; Overwrite of memset by memcpy. Overwrite is stronger atomicity. We can
;; remove the memset.
define void @test17_atomic_weaker(ptr %P, ptr noalias %Q) nounwind ssp {
; CHECK-LABEL: @test17_atomic_weaker(
; CHECK-NEXT: tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 [[P:%.*]], ptr align 1 [[Q:%.*]], i64 12, i32 1)
; CHECK-NEXT: ret void
;
tail call void @llvm.memset.p0.i64(ptr align 1 %P, i8 42, i64 8, i1 false)
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i32 1)
ret void
}
;; Overwrite of memset by memcpy. Overwrite is weaker atomicity. We can remove
;; the memset.
define void @test17_atomic_weaker_2(ptr %P, ptr noalias %Q) nounwind ssp {
; CHECK-LABEL: @test17_atomic_weaker_2(
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 [[P:%.*]], ptr align 1 [[Q:%.*]], i64 12, i1 false)
; CHECK-NEXT: ret void
;
tail call void @llvm.memset.element.unordered.atomic.p0.i64(ptr align 1 %P, i8 42, i64 8, i32 1)
tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i1 false)
ret void
}
; Should not delete the volatile memset.
define void @test17v(ptr %P, ptr %Q) nounwind ssp {
; CHECK-LABEL: @test17v(
; CHECK-NEXT: tail call void @llvm.memset.p0.i64(ptr [[P:%.*]], i8 42, i64 8, i1 true)
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr [[P]], ptr [[Q:%.*]], i64 12, i1 false)
; CHECK-NEXT: ret void
;
tail call void @llvm.memset.p0.i64(ptr %P, i8 42, i64 8, i1 true)
tail call void @llvm.memcpy.p0.p0.i64(ptr %P, ptr %Q, i64 12, i1 false)
ret void
}
; PR8728
; Do not delete instruction where possible situation is:
; A = B
; A = A
;
; NB! See PR11763 - currently LLVM allows memcpy's source and destination to be
; equal (but not inequal and overlapping).
define void @test18(ptr %P, ptr %Q, ptr %R) nounwind ssp {
; CHECK-LABEL: @test18(
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr [[P:%.*]], ptr [[Q:%.*]], i64 12, i1 false)
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr [[P]], ptr [[R:%.*]], i64 12, i1 false)
; CHECK-NEXT: ret void
;
tail call void @llvm.memcpy.p0.p0.i64(ptr %P, ptr %Q, i64 12, i1 false)
tail call void @llvm.memcpy.p0.p0.i64(ptr %P, ptr %R, i64 12, i1 false)
ret void
}
define void @test18_atomic(ptr %P, ptr %Q, ptr %R) nounwind ssp {
; CHECK-LABEL: @test18_atomic(
; CHECK-NEXT: tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 [[P:%.*]], ptr align 1 [[Q:%.*]], i64 12, i32 1)
; CHECK-NEXT: tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 [[P]], ptr align 1 [[R:%.*]], i64 12, i32 1)
; CHECK-NEXT: ret void
;
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %Q, i64 12, i32 1)
tail call void @llvm.memcpy.element.unordered.atomic.p0.p0.i64(ptr align 1 %P, ptr align 1 %R, i64 12, i32 1)
ret void
}
|
