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
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
|
; Test memory-to-memory ANDs.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
@g1src = dso_local global i8 1
@g1dst = dso_local global i8 1
@g2src = dso_local global i16 2
@g2dst = dso_local global i16 2
; Test the simple i8 case.
define dso_local void @f1(ptr %ptr1) {
; CHECK-LABEL: f1:
; CHECK: nc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8, ptr %ptr1, i64 1
%val = load i8, ptr %ptr1
%old = load i8, ptr %ptr2
%and = and i8 %val, %old
store i8 %and, ptr %ptr2
ret void
}
; ...and again in reverse.
define dso_local void @f2(ptr %ptr1) {
; CHECK-LABEL: f2:
; CHECK: nc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8, ptr %ptr1, i64 1
%val = load i8, ptr %ptr1
%old = load i8, ptr %ptr2
%and = and i8 %old, %val
store i8 %and, ptr %ptr2
ret void
}
; Test i8 cases where one value is zero-extended to 32 bits and the other
; sign-extended.
define dso_local void @f3(ptr %ptr1) {
; CHECK-LABEL: f3:
; CHECK: nc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8, ptr %ptr1, i64 1
%val = load i8, ptr %ptr1
%extval = zext i8 %val to i32
%old = load i8, ptr %ptr2
%extold = sext i8 %old to i32
%and = and i32 %extval, %extold
%trunc = trunc i32 %and to i8
store i8 %trunc, ptr %ptr2
ret void
}
; ...and again with the extension types reversed.
define dso_local void @f4(ptr %ptr1) {
; CHECK-LABEL: f4:
; CHECK: nc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8, ptr %ptr1, i64 1
%val = load i8, ptr %ptr1
%extval = sext i8 %val to i32
%old = load i8, ptr %ptr2
%extold = zext i8 %old to i32
%and = and i32 %extval, %extold
%trunc = trunc i32 %and to i8
store i8 %trunc, ptr %ptr2
ret void
}
; ...and again with two sign extensions.
define dso_local void @f5(ptr %ptr1) {
; CHECK-LABEL: f5:
; CHECK: nc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8, ptr %ptr1, i64 1
%val = load i8, ptr %ptr1
%extval = sext i8 %val to i32
%old = load i8, ptr %ptr2
%extold = sext i8 %old to i32
%and = and i32 %extval, %extold
%trunc = trunc i32 %and to i8
store i8 %trunc, ptr %ptr2
ret void
}
; ...and again with two zero extensions.
define dso_local void @f6(ptr %ptr1) {
; CHECK-LABEL: f6:
; CHECK: nc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8, ptr %ptr1, i64 1
%val = load i8, ptr %ptr1
%extval = zext i8 %val to i32
%old = load i8, ptr %ptr2
%extold = zext i8 %old to i32
%and = and i32 %extval, %extold
%trunc = trunc i32 %and to i8
store i8 %trunc, ptr %ptr2
ret void
}
; Test i8 cases where the value is extended to 64 bits (just one case
; this time).
define dso_local void @f7(ptr %ptr1) {
; CHECK-LABEL: f7:
; CHECK: nc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8, ptr %ptr1, i64 1
%val = load i8, ptr %ptr1
%extval = sext i8 %val to i64
%old = load i8, ptr %ptr2
%extold = zext i8 %old to i64
%and = and i64 %extval, %extold
%trunc = trunc i64 %and to i8
store i8 %trunc, ptr %ptr2
ret void
}
; Test the simple i16 case.
define dso_local void @f8(ptr %ptr1) {
; CHECK-LABEL: f8:
; CHECK: nc 2(2,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i16, ptr %ptr1, i64 1
%val = load i16, ptr %ptr1
%old = load i16, ptr %ptr2
%and = and i16 %val, %old
store i16 %and, ptr %ptr2
ret void
}
; Test i16 cases where the value is extended to 32 bits.
define dso_local void @f9(ptr %ptr1) {
; CHECK-LABEL: f9:
; CHECK: nc 2(2,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i16, ptr %ptr1, i64 1
%val = load i16, ptr %ptr1
%extval = zext i16 %val to i32
%old = load i16, ptr %ptr2
%extold = sext i16 %old to i32
%and = and i32 %extval, %extold
%trunc = trunc i32 %and to i16
store i16 %trunc, ptr %ptr2
ret void
}
; Test i16 cases where the value is extended to 64 bits.
define dso_local void @f10(ptr %ptr1) {
; CHECK-LABEL: f10:
; CHECK: nc 2(2,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i16, ptr %ptr1, i64 1
%val = load i16, ptr %ptr1
%extval = sext i16 %val to i64
%old = load i16, ptr %ptr2
%extold = zext i16 %old to i64
%and = and i64 %extval, %extold
%trunc = trunc i64 %and to i16
store i16 %trunc, ptr %ptr2
ret void
}
; Test the simple i32 case.
define dso_local void @f11(ptr %ptr1) {
; CHECK-LABEL: f11:
; CHECK: nc 4(4,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i32, ptr %ptr1, i64 1
%val = load i32, ptr %ptr1
%old = load i32, ptr %ptr2
%and = and i32 %old, %val
store i32 %and, ptr %ptr2
ret void
}
; Test i32 cases where the value is extended to 64 bits.
define dso_local void @f12(ptr %ptr1) {
; CHECK-LABEL: f12:
; CHECK: nc 4(4,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i32, ptr %ptr1, i64 1
%val = load i32, ptr %ptr1
%extval = sext i32 %val to i64
%old = load i32, ptr %ptr2
%extold = zext i32 %old to i64
%and = and i64 %extval, %extold
%trunc = trunc i64 %and to i32
store i32 %trunc, ptr %ptr2
ret void
}
; Test the i64 case.
define dso_local void @f13(ptr %ptr1) {
; CHECK-LABEL: f13:
; CHECK: nc 8(8,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i64, ptr %ptr1, i64 1
%val = load i64, ptr %ptr1
%old = load i64, ptr %ptr2
%and = and i64 %old, %val
store i64 %and, ptr %ptr2
ret void
}
; Make sure that we don't use NC if the first load is volatile.
define dso_local void @f14(ptr %ptr1) {
; CHECK-LABEL: f14:
; CHECK-NOT: nc
; CHECK: br %r14
%ptr2 = getelementptr i64, ptr %ptr1, i64 1
%val = load volatile i64, ptr %ptr1
%old = load i64, ptr %ptr2
%and = and i64 %old, %val
store i64 %and, ptr %ptr2
ret void
}
; ...likewise the second.
define dso_local void @f15(ptr %ptr1) {
; CHECK-LABEL: f15:
; CHECK-NOT: nc
; CHECK: br %r14
%ptr2 = getelementptr i64, ptr %ptr1, i64 1
%val = load i64, ptr %ptr1
%old = load volatile i64, ptr %ptr2
%and = and i64 %old, %val
store i64 %and, ptr %ptr2
ret void
}
; ...likewise the store.
define dso_local void @f16(ptr %ptr1) {
; CHECK-LABEL: f16:
; CHECK-NOT: nc
; CHECK: br %r14
%ptr2 = getelementptr i64, ptr %ptr1, i64 1
%val = load i64, ptr %ptr1
%old = load i64, ptr %ptr2
%and = and i64 %old, %val
store volatile i64 %and, ptr %ptr2
ret void
}
; Test that NC is not used for aligned loads and stores if there is
; no way of telling whether they alias. We don't want to use NC in
; cases where the addresses could be equal.
define dso_local void @f17(ptr %ptr1, ptr %ptr2) {
; CHECK-LABEL: f17:
; CHECK-NOT: nc
; CHECK: br %r14
%val = load i64, ptr %ptr1
%old = load i64, ptr %ptr2
%and = and i64 %old, %val
store i64 %and, ptr %ptr2
ret void
}
; ...but if one of the loads isn't aligned, we can't be sure.
define dso_local void @f18(ptr %ptr1, ptr %ptr2) {
; CHECK-LABEL: f18:
; CHECK-NOT: nc
; CHECK: br %r14
%val = load i64, ptr %ptr1, align 2
%old = load i64, ptr %ptr2
%and = and i64 %old, %val
store i64 %and, ptr %ptr2
ret void
}
; Repeat the previous test with the operands in the opposite order.
define dso_local void @f19(ptr %ptr1, ptr %ptr2) {
; CHECK-LABEL: f19:
; CHECK-NOT: nc
; CHECK: br %r14
%val = load i64, ptr %ptr1, align 2
%old = load i64, ptr %ptr2
%and = and i64 %val, %old
store i64 %and, ptr %ptr2
ret void
}
; ...and again with the other operand being unaligned.
define dso_local void @f20(ptr %ptr1, ptr %ptr2) {
; CHECK-LABEL: f20:
; CHECK-NOT: nc
; CHECK: br %r14
%val = load i64, ptr %ptr1
%old = load i64, ptr %ptr2, align 2
%and = and i64 %val, %old
store i64 %and, ptr %ptr2, align 2
ret void
}
; Test a case where there is definite overlap.
define dso_local void @f21(i64 %base) {
; CHECK-LABEL: f21:
; CHECK-NOT: nc
; CHECK: br %r14
%add = add i64 %base, 1
%ptr1 = inttoptr i64 %base to ptr
%ptr2 = inttoptr i64 %add to ptr
%val = load i64, ptr %ptr1
%old = load i64, ptr %ptr2, align 1
%and = and i64 %old, %val
store i64 %and, ptr %ptr2, align 1
ret void
}
; Test that we can use NC for global addresses for i8.
define dso_local void @f22(ptr %ptr) {
; CHECK-LABEL: f22:
; CHECK-DAG: larl [[SRC:%r[0-5]]], g1src
; CHECK-DAG: larl [[DST:%r[0-5]]], g1dst
; CHECK: nc 0(1,[[DST]]), 0([[SRC]])
; CHECK: br %r14
%val = load i8, ptr@g1src
%old = load i8, ptr@g1dst
%and = and i8 %val, %old
store i8 %and, ptr@g1dst
ret void
}
; Test that we use NC even where LHRL and STHRL are available.
define dso_local void @f23(ptr %ptr) {
; CHECK-LABEL: f23:
; CHECK-DAG: larl [[SRC:%r[0-5]]], g2src
; CHECK-DAG: larl [[DST:%r[0-5]]], g2dst
; CHECK: nc 0(2,[[DST]]), 0([[SRC]])
; CHECK: br %r14
%val = load i16, ptr@g2src
%old = load i16, ptr@g2dst
%and = and i16 %val, %old
store i16 %and, ptr@g2dst
ret void
}
; Test a case where offset disambiguation is enough.
define dso_local void @f24(ptr %ptr1) {
; CHECK-LABEL: f24:
; CHECK: nc 8(8,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i64, ptr %ptr1, i64 1
%val = load i64, ptr %ptr1, align 1
%old = load i64, ptr %ptr2, align 1
%and = and i64 %old, %val
store i64 %and, ptr %ptr2, align 1
ret void
}
; Test a case where TBAA tells us there is no alias.
define dso_local void @f25(ptr %ptr1, ptr %ptr2) {
; CHECK-LABEL: f25:
; CHECK: nc 0(8,%r3), 0(%r2)
; CHECK: br %r14
%val = load i64, ptr %ptr1, align 2, !tbaa !3
%old = load i64, ptr %ptr2, align 2, !tbaa !4
%and = and i64 %old, %val
store i64 %and, ptr %ptr2, align 2, !tbaa !4
ret void
}
; Test a case where TBAA information is present but doesn't help.
define dso_local void @f26(ptr %ptr1, ptr %ptr2) {
; CHECK-LABEL: f26:
; CHECK-NOT: nc
; CHECK: br %r14
%val = load i64, ptr %ptr1, align 2, !tbaa !3
%old = load i64, ptr %ptr2, align 2, !tbaa !3
%and = and i64 %old, %val
store i64 %and, ptr %ptr2, align 2, !tbaa !3
ret void
}
; Test a case where one of the loads are optimized by the DAGCombiner to a
; zero-extending load of half the original size.
define dso_local void @f27(ptr noalias %ptr1, ptr noalias %ptr2) {
; CHECK-LABEL: f27:
; CHECK-NOT: nc
; CHECK: br %r14
entry:
%0 = load i16, ptr %ptr1, align 2
%1 = lshr i16 %0, 8
%2 = load i16, ptr %ptr2, align 2
%and7 = and i16 %1, %2
store i16 %and7, ptr %ptr1, align 2
ret void
}
!0 = !{ !"root" }
!1 = !{ !"set1", !0 }
!2 = !{ !"set2", !0 }
!3 = !{ !1, !1, i64 0}
!4 = !{ !2, !2, i64 0}
|
