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
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
|
; RUN: llc -mtriple=aarch64-none-linux-gnu -o - %s | FileCheck %s
;; Check that the llvm aarch64 backend can handle arrays of
;; structs and vice versa when passed from IR.
;; (this layering is something clang would normally simplify)
;;
;; Some of these examples are not ABI compliant and they're not
;; meant to be. For instance according to the ABI an aggregate
;; with more than 4 members must go in memory. This restriction
;; is applied earlier in the compilation process so here we do
;; see 8 member types in registers.
;;
;; When we have more than 8 members we simply run out of registers
;; and that's what produces the 8 limit here.
;; Plain arrays
define [ 0 x double ] @array_0() {
; CHECK-LABEL: array_0:
; CHECK: ret
ret [ 0 x double ] zeroinitializer
}
define [ 1 x double ] @array_1() {
; CHECK-LABEL: array_1:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: ret
ret [ 1 x double ] zeroinitializer
}
define [ 8 x double ] @array_8() {
; CHECK-LABEL: array_8:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: movi d2, #0000000000000000
; CHECK-NEXT: movi d3, #0000000000000000
; CHECK-NEXT: movi d4, #0000000000000000
; CHECK-NEXT: movi d5, #0000000000000000
; CHECK-NEXT: movi d6, #0000000000000000
; CHECK-NEXT: movi d7, #0000000000000000
; CHECK-NEXT: ret
ret [ 8 x double ] zeroinitializer
}
;; > 8 items goes on the stack
define [ 9 x double ] @array_9() {
; CHECK-LABEL: array_9:
; CHECK: movi v0.2d, #0000000000000000
; CHECK-NEXT: str xzr, [x8, #64]
; CHECK-NEXT: stp q0, q0, [x8, #32]
; CHECK-NEXT: stp q0, q0, [x8]
; CHECK-NEXT: ret
ret [ 9 x double ] zeroinitializer
}
;; Won't use any registers, just checking for assumptions.
%T_STRUCT_0M = type { }
define %T_STRUCT_0M @struct_zero_fields() {
; CHECK-LABEL: struct_zero_fields:
; CHECK: ret
ret %T_STRUCT_0M zeroinitializer
}
define [ 1 x %T_STRUCT_0M ] @array_of_struct_zero_fields() {
; CHECK-LABEL: array_of_struct_zero_fields:
; CHECK: ret
ret [ 1 x %T_STRUCT_0M ] zeroinitializer
}
define [ 2 x %T_STRUCT_0M ] @array_of_struct_zero_fields_in_struct() {
; CHECK-LABEL: array_of_struct_zero_fields_in_struct:
; CHECK: ret
ret [ 2 x %T_STRUCT_0M ] zeroinitializer
}
%T_STRUCT_1M = type { i32 }
define %T_STRUCT_1M @struct_one_field() {
; CHECK-LABEL: struct_one_field:
; CHECK: w0, wzr
; CHECK-NEXT: ret
ret %T_STRUCT_1M zeroinitializer
}
define [ 1 x %T_STRUCT_1M ] @array_of_struct_one_field() {
; CHECK-LABEL: array_of_struct_one_field:
; CHECK: w0, wzr
; CHECK-NEXT: ret
ret [ 1 x %T_STRUCT_1M ] zeroinitializer
}
;; This one will be a reg block
define [ 2 x %T_STRUCT_1M ] @array_of_struct_one_field_2() {
; CHECK-LABEL: array_of_struct_one_field_2:
; CHECK: w0, wzr
; CHECK: w1, wzr
; CHECK-NEXT: ret
ret [ 2 x %T_STRUCT_1M ] zeroinitializer
}
;; Different types for each field, will not be put in a reg block
%T_STRUCT_DIFFM = type { double, i32 }
define %T_STRUCT_DIFFM @struct_different_field_types() {
; CHECK-LABEL: struct_different_field_types:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: w0, wzr
; CHECK-NEXT: ret
ret %T_STRUCT_DIFFM zeroinitializer
}
define [ 1 x %T_STRUCT_DIFFM ] @array_of_struct_different_field_types() {
; CHECK-LABEL: array_of_struct_different_field_types:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: w0, wzr
; CHECK-NEXT: ret
ret [ 1 x %T_STRUCT_DIFFM ] zeroinitializer
}
define [ 2 x %T_STRUCT_DIFFM ] @array_of_struct_different_field_types_2() {
; CHECK-LABEL: array_of_struct_different_field_types_2:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: w0, wzr
; CHECK-NEXT: w1, wzr
; CHECK-NEXT: ret
ret [ 2 x %T_STRUCT_DIFFM ] zeroinitializer
}
;; Each field is the same type, can be put in a reg block
%T_STRUCT_SAMEM = type { double, double }
;; Here isn't a block as such, we just allocate two consecutive registers
define %T_STRUCT_SAMEM @struct_same_field_types() {
; CHECK-LABEL: struct_same_field_types:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: ret
ret %T_STRUCT_SAMEM zeroinitializer
}
define [ 1 x %T_STRUCT_SAMEM ] @array_of_struct_same_field_types() {
; CHECK-LABEL: array_of_struct_same_field_types:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: ret
ret [ 1 x %T_STRUCT_SAMEM ] zeroinitializer
}
define [ 2 x %T_STRUCT_SAMEM ] @array_of_struct_same_field_types_2() {
; CHECK-LABEL: array_of_struct_same_field_types_2:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: movi d2, #0000000000000000
; CHECK-NEXT: movi d3, #0000000000000000
; CHECK-NEXT: ret
ret [ 2 x %T_STRUCT_SAMEM ] zeroinitializer
}
;; Same field type but integer this time. Put into x registers instead.
%T_STRUCT_SAMEM_INT = type { i64, i64 }
define %T_STRUCT_SAMEM_INT @struct_same_field_types_int() {
; CHECK-LABEL: struct_same_field_types_int:
; CHECK: x0, xzr
; CHECK-NEXT: x1, xzr
; CHECK-NEXT: ret
ret %T_STRUCT_SAMEM_INT zeroinitializer
}
define [ 1 x %T_STRUCT_SAMEM_INT ] @array_of_struct_same_field_types_int() {
; CHECK-LABEL: array_of_struct_same_field_types_int:
; CHECK: x0, xzr
; CHECK-NEXT: x1, xzr
; CHECK-NEXT: ret
ret [ 1 x %T_STRUCT_SAMEM_INT ] zeroinitializer
}
define [ 2 x %T_STRUCT_SAMEM_INT ] @array_of_struct_same_field_types_int_2() {
; CHECK-LABEL: array_of_struct_same_field_types_int_2:
; CHECK: x0, xzr
; CHECK-NEXT: x1, xzr
; CHECK-NEXT: x2, xzr
; CHECK-NEXT: x3, xzr
; CHECK-NEXT: ret
ret [ 2 x %T_STRUCT_SAMEM_INT ] zeroinitializer
}
;; An aggregate of more than 8 items must go in memory.
;; 4x2 struct fields = 8 items so it goes in a block.
define [ 4 x %T_STRUCT_SAMEM ] @array_of_struct_8_fields() {
; CHECK-LABEL: array_of_struct_8_fields:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: movi d2, #0000000000000000
; CHECK-NEXT: movi d3, #0000000000000000
; CHECK-NEXT: movi d4, #0000000000000000
; CHECK-NEXT: movi d5, #0000000000000000
; CHECK-NEXT: movi d6, #0000000000000000
; CHECK-NEXT: movi d7, #0000000000000000
; CHECK-NEXT: ret
ret [ 4 x %T_STRUCT_SAMEM ] zeroinitializer
}
;; 5x2 fields = 10 so it is returned in memory.
define [ 5 x %T_STRUCT_SAMEM ] @array_of_struct_in_memory() {
; CHECK-LABEL: array_of_struct_in_memory:
; CHECK: movi v0.2d, #0000000000000000
; CHECK-NEXT: stp q0, q0, [x8, #48]
; CHECK-NEXT: stp q0, q0, [x8, #16]
; CHECK-NEXT: str q0, [x8]
; CHECK-NEXT: ret
ret [ 5 x %T_STRUCT_SAMEM ] zeroinitializer
}
;; A struct whose field is an array.
%T_STRUCT_ARRAYM = type { [ 2 x double ]};
define %T_STRUCT_ARRAYM @struct_array_field() {
; CHECK-LABEL: struct_array_field:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: ret
ret %T_STRUCT_ARRAYM zeroinitializer
}
define [ 1 x %T_STRUCT_ARRAYM ] @array_of_struct_array_field() {
; CHECK-LABEL: array_of_struct_array_field:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: ret
ret [ 1 x %T_STRUCT_ARRAYM ] zeroinitializer
}
define [ 2 x %T_STRUCT_ARRAYM ] @array_of_struct_array_field_2() {
; CHECK-LABEL: array_of_struct_array_field_2:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: movi d2, #0000000000000000
; CHECK-NEXT: movi d3, #0000000000000000
; CHECK-NEXT: ret
ret [ 2 x %T_STRUCT_ARRAYM ] zeroinitializer
}
;; All non-aggregate fields must have the same type, all through the
;; overall aggreagate. This is false here because of the i32.
%T_NESTED_STRUCT_DIFFM = type {
[ 1 x { { double, double } } ],
[ 1 x { { double, i32 } } ]
};
define %T_NESTED_STRUCT_DIFFM @struct_nested_different_field_types() {
; CHECK-LABEL: struct_nested_different_field_types:
; CHECK: movi d0, #0000000000000000
; CHECK: movi d1, #0000000000000000
; CHECK: movi d2, #0000000000000000
; CHECK-NEXT: w0, wzr
; CHECK-NEXT: ret
ret %T_NESTED_STRUCT_DIFFM zeroinitializer
}
define [ 1 x %T_NESTED_STRUCT_DIFFM ] @array_of_struct_nested_different_field_types() {
; CHECK-LABEL: array_of_struct_nested_different_field_types:
; CHECK: movi d0, #0000000000000000
; CHECK: movi d1, #0000000000000000
; CHECK: movi d2, #0000000000000000
; CHECK-NEXT: w0, wzr
; CHECK-NEXT: ret
ret [ 1 x %T_NESTED_STRUCT_DIFFM ] zeroinitializer
}
define [ 2 x %T_NESTED_STRUCT_DIFFM ] @array_of_struct_nested_different_field_types_2() {
; CHECK-LABEL: array_of_struct_nested_different_field_types_2:
; CHECK: movi d0, #0000000000000000
; CHECK: movi d1, #0000000000000000
; CHECK: movi d2, #0000000000000000
; CHECK-NEXT: movi d3, #0000000000000000
; CHECK-NEXT: movi d4, #0000000000000000
; CHECK-NEXT: movi d5, #0000000000000000
; CHECK-NEXT: w0, wzr
; CHECK-NEXT: w1, wzr
; CHECK-NEXT: ret
ret [ 2 x %T_NESTED_STRUCT_DIFFM ] zeroinitializer
}
;; All fields here are the same type, more nesting to stress the recursive walk.
%T_NESTED_STRUCT_SAMEM = type {
{ { double} },
{ [ 2 x { double, double } ] }
};
define %T_NESTED_STRUCT_SAMEM @struct_nested_same_field_types() {
; CHECK-LABEL: struct_nested_same_field_types:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: movi d2, #0000000000000000
; CHECK-NEXT: movi d3, #0000000000000000
; CHECK-NEXT: movi d4, #0000000000000000
; CHECK-NEXT: ret
ret %T_NESTED_STRUCT_SAMEM zeroinitializer
}
define [ 1 x %T_NESTED_STRUCT_SAMEM ] @array_of_struct_nested_same_field_types() {
; CHECK-LABEL: array_of_struct_nested_same_field_types:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: movi d2, #0000000000000000
; CHECK-NEXT: movi d3, #0000000000000000
; CHECK-NEXT: movi d4, #0000000000000000
; CHECK-NEXT: ret
ret [ 1 x %T_NESTED_STRUCT_SAMEM ] zeroinitializer
}
;; 2 x (1 + (2 x 2)) = 10 so this is returned in memory
define [ 2 x %T_NESTED_STRUCT_SAMEM ] @array_of_struct_nested_same_field_types_2() {
; CHECK-LABEL: array_of_struct_nested_same_field_types_2:
; CHECK: movi v0.2d, #0000000000000000
; CHECK-NEXT: stp q0, q0, [x8, #48]
; CHECK-NEXT: stp q0, q0, [x8, #16]
; CHECK-NEXT: str q0, [x8]
; CHECK-NEXT: ret
ret [ 2 x %T_NESTED_STRUCT_SAMEM ] zeroinitializer
}
;; Check combinations of call, return and argument passing
%T_IN_BLOCK = type [ 2 x { double, { double, double } } ]
define %T_IN_BLOCK @return_in_block() {
; CHECK-LABEL: return_in_block:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: movi d2, #0000000000000000
; CHECK-NEXT: movi d3, #0000000000000000
; CHECK-NEXT: movi d4, #0000000000000000
; CHECK-NEXT: movi d5, #0000000000000000
; CHECK-NEXT: ret
ret %T_IN_BLOCK zeroinitializer
}
@in_block_store = dso_local global %T_IN_BLOCK zeroinitializer, align 8
define void @caller_in_block() {
; CHECK-LABEL: caller_in_block:
; CHECK: bl return_in_block
; CHECK-NEXT: adrp x8, in_block_store
; CHECK-NEXT: add x8, x8, :lo12:in_block_store
; CHECK-NEXT: stp d0, d1, [x8]
; CHECK-NEXT: stp d2, d3, [x8, #16]
; CHECK-NEXT: stp d4, d5, [x8, #32]
; CHECK-NEXT: ldr x30, [sp], #16
; CHECK-NEXT: ret
%1 = call %T_IN_BLOCK @return_in_block()
store %T_IN_BLOCK %1, %T_IN_BLOCK* @in_block_store
ret void
}
define void @callee_in_block(%T_IN_BLOCK %a) {
; CHECK-LABEL: callee_in_block:
; CHECK: adrp x8, in_block_store
; CHECK-NEXT: add x8, x8, :lo12:in_block_store
; CHECK-NEXT: stp d4, d5, [x8, #32]
; CHECK-NEXT: stp d2, d3, [x8, #16]
; CHECK-NEXT: stp d0, d1, [x8]
; CHECK-NEXT: ret
store %T_IN_BLOCK %a, %T_IN_BLOCK* @in_block_store
ret void
}
define void @argument_in_block() {
; CHECK-LABEL: argument_in_block:
; CHECK: adrp x8, in_block_store
; CHECK-NEXT: add x8, x8, :lo12:in_block_store
; CHECK-NEXT: ldp d4, d5, [x8, #32]
; CHECK-NEXT: ldp d2, d3, [x8, #16]
; CHECK-NEXT: ldp d0, d1, [x8]
; CHECK-NEXT: bl callee_in_block
%1 = load %T_IN_BLOCK, %T_IN_BLOCK* @in_block_store
call void @callee_in_block(%T_IN_BLOCK %1)
ret void
}
%T_IN_MEMORY = type [ 3 x { double, { double, double } } ]
define %T_IN_MEMORY @return_in_memory() {
; CHECK-LABEL: return_in_memory:
; CHECK: movi v0.2d, #0000000000000000
; CHECK-NEXT: str xzr, [x8, #64]
; CHECK-NEXT: stp q0, q0, [x8, #32]
; CHECK-NEXT: stp q0, q0, [x8]
; CHECK-NEXT: ret
ret %T_IN_MEMORY zeroinitializer
}
@in_memory_store = dso_local global %T_IN_MEMORY zeroinitializer, align 8
define void @caller_in_memory() {
; CHECK-LABEL: caller_in_memory:
; CHECK: add x8, sp, #8
; CHECK-NEXT: bl return_in_memory
; CHECK-NEXT: ldr d0, [sp, #72]
; CHECK-NEXT: ldur q1, [sp, #24]
; CHECK-NEXT: ldur q2, [sp, #8]
; CHECK-NEXT: ldur q3, [sp, #56]
; CHECK-NEXT: ldur q4, [sp, #40]
; CHECK-NEXT: ldr x30, [sp, #80]
; CHECK-NEXT: adrp x8, in_memory_store
; CHECK-NEXT: add x8, x8, :lo12:in_memory_store
; CHECK-NEXT: stp q2, q1, [x8]
; CHECK-NEXT: stp q4, q3, [x8, #32]
; CHECK-NEXT: str d0, [x8, #64]
; CHECK-NEXT: add sp, sp, #96
; CHECK-NEXT: ret
%1 = call %T_IN_MEMORY @return_in_memory()
store %T_IN_MEMORY %1, %T_IN_MEMORY* @in_memory_store
ret void
}
define void @callee_in_memory(%T_IN_MEMORY %a) {
; CHECK-LABEL: callee_in_memory:
; CHECK: ldp q0, q1, [sp, #32]
; CHECK-NEXT: ldr d2, [sp, #64]
; CHECK-NEXT: ldp q3, q4, [sp]
; CHECK-NEXT: adrp x8, in_memory_store
; CHECK-NEXT: add x8, x8, :lo12:in_memory_store
; CHECK-NEXT: str d2, [x8, #64]
; CHECK-NEXT: stp q0, q1, [x8, #32]
; CHECK-NEXT: stp q3, q4, [x8]
; CHECK-NEXT: ret
store %T_IN_MEMORY %a, %T_IN_MEMORY* @in_memory_store
ret void
}
define void @argument_in_memory() {
; CHECK-LABEL: argument_in_memory:
; CHECK: adrp x8, in_memory_store
; CHECK-NEXT: add x8, x8, :lo12:in_memory_store
; CHECK-NEXT: ldp q0, q1, [x8]
; CHECK-NEXT: ldp q2, q3, [x8, #32]
; CHECK-NEXT: ldr d4, [x8, #64]
; CHECK-NEXT: stp q0, q1, [sp]
; CHECK-NEXT: stp q2, q3, [sp, #32]
; CHECK-NEXT: str d4, [sp, #64]
; CHECK-NEXT: bl callee_in_memory
%1 = load %T_IN_MEMORY, %T_IN_MEMORY* @in_memory_store
call void @callee_in_memory(%T_IN_MEMORY %1)
ret void
}
%T_NO_BLOCK = type [ 2 x { double, { i32 } } ]
define %T_NO_BLOCK @return_no_block() {
; CHECK-LABEL: return_no_block:
; CHECK: movi d0, #0000000000000000
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: mov w0, wzr
; CHECK-NEXT: mov w1, wzr
; CHECK-NEXT: ret
ret %T_NO_BLOCK zeroinitializer
}
@no_block_store = dso_local global %T_NO_BLOCK zeroinitializer, align 8
define void @caller_no_block() {
; CHECK-LABEL: caller_no_block:
; CHECK: bl return_no_block
; CHECK-NEXT: adrp x8, no_block_store
; CHECK-NEXT: add x8, x8, :lo12:no_block_store
; CHECK-NEXT: str d0, [x8]
; CHECK-NEXT: str w0, [x8, #8]
; CHECK-NEXT: str d1, [x8, #16]
; CHECK-NEXT: str w1, [x8, #24]
; CHECK-NEXT: ldr x30, [sp], #16
; CHECK-NEXT: ret
%1 = call %T_NO_BLOCK @return_no_block()
store %T_NO_BLOCK %1, %T_NO_BLOCK* @no_block_store
ret void
}
define void @callee_no_block(%T_NO_BLOCK %a) {
; CHECK-LABEL: callee_no_block:
; CHECK: adrp x8, no_block_store
; CHECK-NEXT: add x8, x8, :lo12:no_block_store
; CHECK-NEXT: str w1, [x8, #24]
; CHECK-NEXT: str d1, [x8, #16]
; CHECK-NEXT: str w0, [x8, #8]
; CHECK-NEXT: str d0, [x8]
; CHECK-NEXT: ret
store %T_NO_BLOCK %a, %T_NO_BLOCK* @no_block_store
ret void
}
define void @argument_no_block() {
; CHECK-LABEL: argument_no_block:
; CHECK: adrp x8, no_block_store
; CHECK-NEXT: add x8, x8, :lo12:no_block_store
; CHECK-NEXT: ldr w1, [x8, #24]
; CHECK-NEXT: ldr d1, [x8, #16]
; CHECK-NEXT: ldr w0, [x8, #8]
; CHECK-NEXT: ldr d0, [x8]
; CHECK-NEXT: bl callee_no_block
; CHECK-NEXT: ldr x30, [sp], #16
; CHECK-NEXT: ret
%1 = load %T_NO_BLOCK, %T_NO_BLOCK* @no_block_store
call void @callee_no_block(%T_NO_BLOCK %1)
ret void
}
|
