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
|
; RUN: opt -memcpyopt -S < %s | FileCheck %s
target datalayout = "e-i64:64-f80:128-n8:16:32:64"
target triple = "x86_64-unknown-linux-gnu"
%S = type { i8*, i8, i32 }
define void @copy(%S* %src, %S* %dst) {
; CHECK-LABEL: copy
; CHECK-NOT: load
; CHECK: call void @llvm.memmove.p0i8.p0i8.i64
; CHECK-NEXT: ret void
%1 = load %S, %S* %src
store %S %1, %S* %dst
ret void
}
define void @noaliassrc(%S* noalias %src, %S* %dst) {
; CHECK-LABEL: noaliassrc
; CHECK-NOT: load
; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
; CHECK-NEXT: ret void
%1 = load %S, %S* %src
store %S %1, %S* %dst
ret void
}
define void @noaliasdst(%S* %src, %S* noalias %dst) {
; CHECK-LABEL: noaliasdst
; CHECK-NOT: load
; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
; CHECK-NEXT: ret void
%1 = load %S, %S* %src
store %S %1, %S* %dst
ret void
}
define void @destroysrc(%S* %src, %S* %dst) {
; CHECK-LABEL: destroysrc
; CHECK: load %S, %S* %src
; CHECK: call void @llvm.memset.p0i8.i64
; CHECK-NEXT: store %S %1, %S* %dst
; CHECK-NEXT: ret void
%1 = load %S, %S* %src
store %S zeroinitializer, %S* %src
store %S %1, %S* %dst
ret void
}
define void @destroynoaliassrc(%S* noalias %src, %S* %dst) {
; CHECK-LABEL: destroynoaliassrc
; CHECK-NOT: load
; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
; CHECK-NEXT: call void @llvm.memset.p0i8.i64
; CHECK-NEXT: ret void
%1 = load %S, %S* %src
store %S zeroinitializer, %S* %src
store %S %1, %S* %dst
ret void
}
define void @copyalias(%S* %src, %S* %dst) {
; CHECK-LABEL: copyalias
; CHECK-NEXT: [[LOAD:%[a-z0-9\.]+]] = load %S, %S* %src
; CHECK-NOT: load
; CHECK: call void @llvm.memmove.p0i8.p0i8.i64
; CHECK-NEXT: store %S [[LOAD]], %S* %dst
; CHECK-NEXT: ret void
%1 = load %S, %S* %src
%2 = load %S, %S* %src
store %S %1, %S* %dst
store %S %2, %S* %dst
ret void
}
; If the store address is computed in a complex manner, make
; sure we lift the computation as well if needed and possible.
define void @addrproducer(%S* %src, %S* %dst) {
; CHECK-LABEL: addrproducer(
; CHECK-NEXT: %[[DSTCAST:[0-9]+]] = bitcast %S* %dst to i8*
; CHECK-NEXT: %dst2 = getelementptr %S, %S* %dst, i64 1
; CHECK-NEXT: %[[DST2CAST:[0-9]+]] = bitcast %S* %dst2 to i8*
; CHECK-NEXT: %[[SRCCAST:[0-9]+]] = bitcast %S* %src to i8*
; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64(i8* align 8 %[[DST2CAST]], i8* align 8 %[[SRCCAST]], i64 16, i1 false)
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 8 %[[DSTCAST]], i8 undef, i64 16, i1 false)
; CHECK-NEXT: ret void
%1 = load %S, %S* %src
store %S undef, %S* %dst
%dst2 = getelementptr %S , %S* %dst, i64 1
store %S %1, %S* %dst2
ret void
}
define void @aliasaddrproducer(%S* %src, %S* %dst, i32* %dstidptr) {
; CHECK-LABEL: aliasaddrproducer(
; CHECK-NEXT: %[[SRC:[0-9]+]] = load %S, %S* %src
; CHECK-NEXT: %[[DSTCAST:[0-9]+]] = bitcast %S* %dst to i8*
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 8 %[[DSTCAST]], i8 undef, i64 16, i1 false)
; CHECK-NEXT: %dstindex = load i32, i32* %dstidptr
; CHECK-NEXT: %dst2 = getelementptr %S, %S* %dst, i32 %dstindex
; CHECK-NEXT: store %S %[[SRC]], %S* %dst2
; CHECK-NEXT: ret void
%1 = load %S, %S* %src
store %S undef, %S* %dst
%dstindex = load i32, i32* %dstidptr
%dst2 = getelementptr %S , %S* %dst, i32 %dstindex
store %S %1, %S* %dst2
ret void
}
define void @noaliasaddrproducer(%S* %src, %S* noalias %dst, i32* noalias %dstidptr) {
; CHECK-LABEL: noaliasaddrproducer(
; CHECK-NEXT: %[[SRCCAST:[0-9]+]] = bitcast %S* %src to i8*
; CHECK-NEXT: %[[LOADED:[0-9]+]] = load i32, i32* %dstidptr
; CHECK-NEXT: %dstindex = or i32 %[[LOADED]], 1
; CHECK-NEXT: %dst2 = getelementptr %S, %S* %dst, i32 %dstindex
; CHECK-NEXT: %[[DST2CAST:[0-9]+]] = bitcast %S* %dst2 to i8*
; CHECK-NEXT: %[[SRCCAST2:[0-9]+]] = bitcast %S* %src to i8*
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %[[DST2CAST]], i8* align 8 %[[SRCCAST2]], i64 16, i1 false)
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 8 %[[SRCCAST]], i8 undef, i64 16, i1 false)
; CHECK-NEXT: ret void
%1 = load %S, %S* %src
store %S undef, %S* %src
%2 = load i32, i32* %dstidptr
%dstindex = or i32 %2, 1
%dst2 = getelementptr %S , %S* %dst, i32 %dstindex
store %S %1, %S* %dst2
ret void
}
|
