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
| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=haswell | FileCheck %s -check-prefix=NOAA
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=haswell -combiner-global-alias-analysis=1 | FileCheck %s -check-prefix=AA
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1)
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)
%struct.S = type { [16 x i8] }
define dso_local void @_Z4SwapP1SS0_(%struct.S* nocapture %a, %struct.S* nocapture %b) local_unnamed_addr {
; NOAA-LABEL: _Z4SwapP1SS0_:
; NOAA: # %bb.0: # %entry
; NOAA-NEXT: vmovups (%rdi), %xmm0
; NOAA-NEXT: vmovaps %xmm0, -{{[0-9]+}}(%rsp)
; NOAA-NEXT: vmovups (%rsi), %xmm0
; NOAA-NEXT: vmovups %xmm0, (%rdi)
; NOAA-NEXT: vmovaps -{{[0-9]+}}(%rsp), %xmm0
; NOAA-NEXT: vmovups %xmm0, (%rsi)
; NOAA-NEXT: retq
;
; AA-LABEL: _Z4SwapP1SS0_:
; AA: # %bb.0: # %entry
; AA-NEXT: vmovups (%rdi), %xmm0
; AA-NEXT: vmovups (%rsi), %xmm1
; AA-NEXT: vmovups %xmm1, (%rdi)
; AA-NEXT: vmovups %xmm0, (%rsi)
; AA-NEXT: retq
entry:
%tmp.sroa.0 = alloca [16 x i8], align 1
%tmp.sroa.0.0..sroa_idx6 = getelementptr inbounds [16 x i8], [16 x i8]* %tmp.sroa.0, i64 0, i64 0
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %tmp.sroa.0.0..sroa_idx6)
%tmp.sroa.0.0..sroa_idx1 = getelementptr inbounds %struct.S, %struct.S* %a, i64 0, i32 0, i64 0
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %tmp.sroa.0.0..sroa_idx6, i8* align 1 %tmp.sroa.0.0..sroa_idx1, i64 16, i1 false)
%0 = getelementptr inbounds %struct.S, %struct.S* %b, i64 0, i32 0, i64 0
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 %tmp.sroa.0.0..sroa_idx1, i8* align 1 %0, i64 16, i1 false), !tbaa.struct !2
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 %0, i8* nonnull align 1 %tmp.sroa.0.0..sroa_idx6, i64 16, i1 false)
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %tmp.sroa.0.0..sroa_idx6)
ret void
}
define dso_local void @onealloc_noreadback(i8* nocapture %a, i8* nocapture %b) local_unnamed_addr {
; NOAA-LABEL: onealloc_noreadback:
; NOAA: # %bb.0: # %entry
; NOAA-NEXT: retq
;
; AA-LABEL: onealloc_noreadback:
; AA: # %bb.0: # %entry
; AA-NEXT: retq
entry:
%alloc = alloca [16 x i8], i8 2, align 1
%part1 = getelementptr inbounds [16 x i8], [16 x i8]* %alloc, i64 0, i64 0
%part2 = getelementptr inbounds [16 x i8], [16 x i8]* %alloc, i64 1, i64 0
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %part1)
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %part2)
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %part1, i8* align 1 %a, i64 16, i1 false)
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %part2, i8* align 1 %b, i64 16, i1 false)
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %part1)
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %part2)
ret void
}
define dso_local void @twoallocs_trivial(i8* nocapture %a, i8* nocapture %b) local_unnamed_addr {
; NOAA-LABEL: twoallocs_trivial:
; NOAA: # %bb.0: # %entry
; NOAA-NEXT: retq
;
; AA-LABEL: twoallocs_trivial:
; AA: # %bb.0: # %entry
; AA-NEXT: retq
entry:
%alloc1 = alloca [16 x i8], align 1
%alloc2 = alloca [16 x i8], align 1
%part1 = getelementptr inbounds [16 x i8], [16 x i8]* %alloc1, i64 0, i64 0
%part2 = getelementptr inbounds [16 x i8], [16 x i8]* %alloc2, i64 0, i64 0
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %part1)
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %part2)
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %part1, i8* align 1 %a, i64 16, i1 false)
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %part2, i8* align 1 %b, i64 16, i1 false)
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %part1)
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %part2)
ret void
}
define dso_local void @twoallocs(i8* nocapture %a, i8* nocapture %b) local_unnamed_addr {
; NOAA-LABEL: twoallocs:
; NOAA: # %bb.0: # %entry
; NOAA-NEXT: vmovups (%rdi), %xmm0
; NOAA-NEXT: vmovaps %xmm0, -{{[0-9]+}}(%rsp)
; NOAA-NEXT: vmovups %xmm0, (%rsi)
; NOAA-NEXT: retq
;
; AA-LABEL: twoallocs:
; AA: # %bb.0: # %entry
; AA-NEXT: vmovups (%rdi), %xmm0
; AA-NEXT: vmovaps %xmm0, -{{[0-9]+}}(%rsp)
; AA-NEXT: vmovups %xmm0, (%rsi)
; AA-NEXT: retq
entry:
%alloc1 = alloca [16 x i8], align 1
%alloc2 = alloca [16 x i8], align 1
%part1 = getelementptr inbounds [16 x i8], [16 x i8]* %alloc1, i64 0, i64 0
%part2 = getelementptr inbounds [16 x i8], [16 x i8]* %alloc2, i64 0, i64 0
%part2_alias = getelementptr inbounds [16 x i8], [16 x i8]* %alloc2, i64 0, i64 0
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %part1)
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %part2)
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %part2, i8* align 1 %a, i64 16, i1 false)
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %part1)
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %b, i8* align 1 %part2_alias, i64 16, i1 false)
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %part2)
ret void
}
define dso_local void @onealloc_readback_1(i8* nocapture %a, i8* nocapture %b) local_unnamed_addr {
; NOAA-LABEL: onealloc_readback_1:
; NOAA: # %bb.0: # %entry
; NOAA-NEXT: vmovups (%rdi), %xmm0
; NOAA-NEXT: vmovaps %xmm0, -{{[0-9]+}}(%rsp)
; NOAA-NEXT: vmovups (%rsi), %xmm0
; NOAA-NEXT: vmovaps %xmm0, -{{[0-9]+}}(%rsp)
; NOAA-NEXT: vmovups %xmm0, (%rdi)
; NOAA-NEXT: retq
;
; AA-LABEL: onealloc_readback_1:
; AA: # %bb.0: # %entry
; AA-NEXT: vmovups (%rsi), %xmm0
; AA-NEXT: vmovaps %xmm0, -{{[0-9]+}}(%rsp)
; AA-NEXT: vmovups %xmm0, (%rdi)
; AA-NEXT: retq
entry:
%alloc = alloca [16 x i8], i8 2, align 1
%part2 = getelementptr inbounds [16 x i8], [16 x i8]* %alloc, i64 0, i64 0
%part1 = getelementptr inbounds [16 x i8], [16 x i8]* %alloc, i64 1, i64 0
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %part1)
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %part2)
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %part1, i8* align 1 %a, i64 16, i1 false)
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %part2, i8* align 1 %b, i64 16, i1 false)
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %part1)
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %a, i8* align 1 %part2, i64 16, i1 false)
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %part2)
ret void
}
define dso_local void @onealloc_readback_2(i8* nocapture %a, i8* nocapture %b) local_unnamed_addr {
; NOAA-LABEL: onealloc_readback_2:
; NOAA: # %bb.0: # %entry
; NOAA-NEXT: vmovups (%rdi), %xmm0
; NOAA-NEXT: vmovaps %xmm0, -{{[0-9]+}}(%rsp)
; NOAA-NEXT: vmovups (%rsi), %xmm0
; NOAA-NEXT: vmovaps %xmm0, -{{[0-9]+}}(%rsp)
; NOAA-NEXT: vmovups %xmm0, (%rdi)
; NOAA-NEXT: retq
;
; AA-LABEL: onealloc_readback_2:
; AA: # %bb.0: # %entry
; AA-NEXT: vmovups (%rsi), %xmm0
; AA-NEXT: vmovaps %xmm0, -{{[0-9]+}}(%rsp)
; AA-NEXT: vmovups %xmm0, (%rdi)
; AA-NEXT: retq
entry:
%alloc = alloca [16 x i8], i8 2, align 1
%part1 = getelementptr inbounds [16 x i8], [16 x i8]* %alloc, i64 0, i64 0
%part2 = getelementptr inbounds [16 x i8], [16 x i8]* %alloc, i64 1, i64 0
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %part1)
call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %part2)
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %part1, i8* align 1 %a, i64 16, i1 false)
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %part2, i8* align 1 %b, i64 16, i1 false)
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %part1)
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 %a, i8* align 1 %part2, i64 16, i1 false)
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %part2)
ret void
}
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"clang version 9.0.0 (trunk 352631) (llvm/trunk 352632)"}
!2 = !{i64 0, i64 16, !3}
!3 = !{!4, !4, i64 0}
!4 = !{!"omnipotent char", !5, i64 0}
!5 = !{!"Simple C++ TBAA"}
|