aboutsummaryrefslogtreecommitdiffstats
path: root/test/CodeGen/SystemZ/memcpy-01.ll
blob: 1d7b28e940b9ee86bd399fd65c67315ca7b13d5d (plain)
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
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
; Test memcpy using MVC.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s

declare void @llvm.memcpy.p0i8.p0i8.i32(i8 *nocapture, i8 *nocapture, i32, i32, i1) nounwind
declare void @llvm.memcpy.p0i8.p0i8.i64(i8 *nocapture, i8 *nocapture, i64, i32, i1) nounwind
declare void @foo(i8 *, i8 *)

; Test a no-op move, i32 version.
define void @f1(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f1:
; CHECK-NOT: %r2
; CHECK-NOT: %r3
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 0, i32 1,
                                       i1 false)
  ret void
}

; Test a no-op move, i64 version.
define void @f2(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f2:
; CHECK-NOT: %r2
; CHECK-NOT: %r3
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 0, i32 1,
                                       i1 false)
  ret void
}

; Test a 1-byte move, i32 version.
define void @f3(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f3:
; CHECK: mvc 0(1,%r2), 0(%r3)
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 1, i32 1,
                                       i1 false)
  ret void
}

; Test a 1-byte move, i64 version.
define void @f4(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f4:
; CHECK: mvc 0(1,%r2), 0(%r3)
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1, i32 1,
                                       i1 false)
  ret void
}

; Test the upper range of a single MVC, i32 version.
define void @f5(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f5:
; CHECK: mvc 0(256,%r2), 0(%r3)
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 256, i32 1,
                                       i1 false)
  ret void
}

; Test the upper range of a single MVC, i64 version.
define void @f6(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f6:
; CHECK: mvc 0(256,%r2), 0(%r3)
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 256, i32 1,
                                       i1 false)
  ret void
}

; Test the first case that needs two MVCs.
define void @f7(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f7:
; CHECK: mvc 0(256,%r2), 0(%r3)
; CHECK: mvc 256(1,%r2), 256(%r3)
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 257, i32 1,
                                       i1 false)
  ret void
}

; Test the last-but-one case that needs two MVCs.
define void @f8(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f8:
; CHECK: mvc 0(256,%r2), 0(%r3)
; CHECK: mvc 256(255,%r2), 256(%r3)
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 511, i32 1,
                                       i1 false)
  ret void
}

; Test the last case that needs two MVCs.
define void @f9(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f9:
; CHECK: mvc 0(256,%r2), 0(%r3)
; CHECK: mvc 256(256,%r2), 256(%r3)
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 512, i32 1,
                                       i1 false)
  ret void
}

; Test an arbitrary value that uses straight-line code.
define void @f10(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f10:
; CHECK: mvc 0(256,%r2), 0(%r3)
; CHECK: mvc 256(256,%r2), 256(%r3)
; CHECK: mvc 512(256,%r2), 512(%r3)
; CHECK: mvc 768(256,%r2), 768(%r3)
; CHECK: mvc 1024(255,%r2), 1024(%r3)
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1279, i32 1,
                                       i1 false)
  ret void
}

; ...and again in cases where not all parts are in range of MVC.
define void @f11(i8 *%srcbase, i8 *%destbase) {
; CHECK-LABEL: f11:
; CHECK: mvc 4000(256,%r2), 3500(%r3)
; CHECK: lay [[NEWDEST:%r[1-5]]], 4256(%r2)
; CHECK: mvc 0(256,[[NEWDEST]]), 3756(%r3)
; CHECK: mvc 256(256,[[NEWDEST]]), 4012(%r3)
; CHECK: lay [[NEWSRC:%r[1-5]]], 4268(%r3)
; CHECK: mvc 512(256,[[NEWDEST]]), 0([[NEWSRC]])
; CHECK: mvc 768(255,[[NEWDEST]]), 256([[NEWSRC]])
; CHECK: br %r14
  %dest = getelementptr i8, i8 *%srcbase, i64 4000
  %src = getelementptr i8, i8* %destbase, i64 3500
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1279, i32 1,
                                       i1 false)
  ret void
}

; ...and again with a destination frame base that goes out of range.
define void @f12() {
; CHECK-LABEL: f12:
; CHECK: brasl %r14, foo@PLT
; CHECK: mvc 4076(256,%r15), 2100(%r15)
; CHECK: lay [[NEWDEST:%r[1-5]]], 4332(%r15)
; CHECK: mvc 0(256,[[NEWDEST]]), 2356(%r15)
; CHECK: mvc 256(256,[[NEWDEST]]), 2612(%r15)
; CHECK: mvc 512(256,[[NEWDEST]]), 2868(%r15)
; CHECK: mvc 768(255,[[NEWDEST]]), 3124(%r15)
; CHECK: brasl %r14, foo@PLT
; CHECK: br %r14
  %arr = alloca [6000 x i8]
  %dest = getelementptr [6000 x i8], [6000 x i8] *%arr, i64 0, i64 3900
  %src = getelementptr [6000 x i8], [6000 x i8] *%arr, i64 0, i64 1924
  call void @foo(i8 *%dest, i8 *%src)
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1279, i32 1,
                                       i1 false)
  call void @foo(i8 *%dest, i8 *%src)
  ret void
}

; ...and again with a source frame base that goes out of range.
define void @f13() {
; CHECK-LABEL: f13:
; CHECK: brasl %r14, foo@PLT
; CHECK: mvc 200(256,%r15), 3826(%r15)
; CHECK: mvc 456(256,%r15), 4082(%r15)
; CHECK: lay [[NEWSRC:%r[1-5]]], 4338(%r15)
; CHECK: mvc 712(256,%r15), 0([[NEWSRC]])
; CHECK: mvc 968(256,%r15), 256([[NEWSRC]])
; CHECK: mvc 1224(255,%r15), 512([[NEWSRC]])
; CHECK: brasl %r14, foo@PLT
; CHECK: br %r14
  %arr = alloca [6000 x i8]
  %dest = getelementptr [6000 x i8], [6000 x i8] *%arr, i64 0, i64 24
  %src = getelementptr [6000 x i8], [6000 x i8] *%arr, i64 0, i64 3650
  call void @foo(i8 *%dest, i8 *%src)
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1279, i32 1,
                                       i1 false)
  call void @foo(i8 *%dest, i8 *%src)
  ret void
}

; Test the last case that is done using straight-line code.
define void @f14(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f14:
; CHECK: mvc 0(256,%r2), 0(%r3)
; CHECK: mvc 256(256,%r2), 256(%r3)
; CHECK: mvc 512(256,%r2), 512(%r3)
; CHECK: mvc 768(256,%r2), 768(%r3)
; CHECK: mvc 1024(256,%r2), 1024(%r3)
; CHECK: mvc 1280(256,%r2), 1280(%r3)
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1536, i32 1,
                                       i1 false)
  ret void
}

; Test the first case that is done using a loop.
define void @f15(i8 *%dest, i8 *%src) {
; CHECK-LABEL: f15:
; CHECK: lghi [[COUNT:%r[0-5]]], 6
; CHECK: [[LABEL:\.L[^:]*]]:
; CHECK: pfd 2, 768(%r2)
; CHECK: mvc 0(256,%r2), 0(%r3)
; CHECK: la %r2, 256(%r2)
; CHECK: la %r3, 256(%r3)
; CHECK: brctg [[COUNT]], [[LABEL]]
; CHECK: mvc 0(1,%r2), 0(%r3)
; CHECK: br %r14
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1537, i32 1,
                                       i1 false)
  ret void
}

; ...and again with frame bases, where the base must be loaded into a
; register before the loop.
define void @f16() {
; CHECK-LABEL: f16:
; CHECK: brasl %r14, foo@PLT
; CHECK-DAG: lghi [[COUNT:%r[0-5]]], 6
; CHECK-DAG: la [[BASE:%r[0-5]]], 160(%r15)
; CHECK: [[LABEL:\.L[^:]*]]:
; CHECK: pfd 2, 2368([[BASE]])
; CHECK: mvc 1600(256,[[BASE]]), 0([[BASE]])
; CHECK: la [[BASE]], 256([[BASE]])
; CHECK: brctg [[COUNT]], [[LABEL]]
; CHECK: mvc 1600(1,[[BASE]]), 0([[BASE]])
; CHECK: brasl %r14, foo@PLT
; CHECK: br %r14
  %arr = alloca [3200 x i8]
  %dest = getelementptr [3200 x i8], [3200 x i8] *%arr, i64 0, i64 1600
  %src = getelementptr [3200 x i8], [3200 x i8] *%arr, i64 0, i64 0
  call void @foo(i8 *%dest, i8 *%src)
  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1537, i32 1,
                                       i1 false)
  call void @foo(i8 *%dest, i8 *%src)
  ret void
}