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
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
|
; REQUIRES: aarch64-registered-target
; REQUIRES: x86-registered-target
; COM: Machine function splitting with FDO profiles
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -split-machine-functions | FileCheck %s -check-prefixes=MFS-DEFAULTS,MFS-DEFAULTS-X86
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -split-machine-functions -mfs-psi-cutoff=0 -mfs-count-threshold=2000 | FileCheck %s --dump-input=always -check-prefixes=MFS-OPTS1,MFS-OPTS1-X86
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -split-machine-functions -mfs-psi-cutoff=950000 | FileCheck %s -check-prefixes=MFS-OPTS2,MFS-OPTS2-X86
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -split-machine-functions -mfs-split-ehcode | FileCheck %s -check-prefixes=MFS-EH-SPLIT,MFS-EH-SPLIT-X86
; RUN: llc < %s -mtriple=x86_64 -split-machine-functions -O0 -mfs-psi-cutoff=0 -mfs-count-threshold=10000 | FileCheck %s -check-prefixes=MFS-O0,MFS-O0-X86
; RUN: llc < %s -mtriple=aarch64-unknown-linux-gnu -aarch64-min-jump-table-entries=4 -enable-split-machine-functions | FileCheck %s -check-prefixes=MFS-DEFAULTS,MFS-DEFAULTS-AARCH64
; RUN: llc < %s -mtriple=aarch64-unknown-linux-gnu -aarch64-min-jump-table-entries=4 -enable-split-machine-functions -mfs-psi-cutoff=0 -mfs-count-threshold=2000 | FileCheck %s --dump-input=always -check-prefixes=MFS-OPTS1,MFS-OPTS1-AARCH64
; RUN: llc < %s -mtriple=aarch64-unknown-linux-gnu -aarch64-min-jump-table-entries=4 -enable-split-machine-functions -mfs-psi-cutoff=950000 | FileCheck %s -check-prefixes=MFS-OPTS2,MFS-OPTS2-AARCH64
; RUN: llc < %s -mtriple=aarch64-unknown-linux-gnu -aarch64-min-jump-table-entries=4 -enable-split-machine-functions -mfs-split-ehcode | FileCheck %s -check-prefixes=MFS-EH-SPLIT,MFS-EH-SPLIT-AARCH64
; RUN: llc < %s -mtriple=aarch64 -split-machine-functions -O0 -mfs-psi-cutoff=0 -mfs-count-threshold=10000 | FileCheck %s -check-prefixes=MFS-O0,MFS-O0-AARCH64
; RUN: llc < %s -mtriple=aarch64 -enable-split-machine-functions -aarch64-redzone | FileCheck %s -check-prefixes=MFS-REDZONE-AARCH64
; COM: Machine function splitting with AFDO profiles
; RUN: sed 's/InstrProf/SampleProfile/g' %s > %t.ll
; RUN: llc < %t.ll -mtriple=x86_64-unknown-linux-gnu -split-machine-functions | FileCheck %s --check-prefix=FSAFDO-MFS
; RUN: llc < %t.ll -mtriple=x86_64-unknown-linux-gnu -split-machine-functions | FileCheck %s --check-prefix=FSAFDO-MFS2
define void @foo1(i1 zeroext %0) nounwind !prof !14 !section_prefix !15 {
;; Check that cold block is moved to .text.split.
; MFS-DEFAULTS-LABEL: foo1
; MFS-DEFAULTS: .section .text.split.foo1
; MFS-DEFAULTS-NEXT: foo1.cold:
; MFS-DEFAULTS-X86-NOT: callq bar
; MFS-DEFAULTS-X86-NEXT: callq baz
; MFS-DEFAULTS-AARCH64-NOT: bl bar
; MFS-DEFAULTS-AARCH64-NEXT: bl baz
br i1 %0, label %2, label %4, !prof !17
2: ; preds = %1
%3 = call i32 @bar()
br label %6
4: ; preds = %1
%5 = call i32 @baz()
br label %6
6: ; preds = %4, %2
%7 = tail call i32 @qux()
ret void
}
define void @foo2(i1 zeroext %0) nounwind !prof !23 !section_prefix !16 {
;; Check that function marked unlikely is not split.
; MFS-DEFAULTS-LABEL: foo2
; MFS-DEFAULTS-NOT: foo2.cold:
br i1 %0, label %2, label %4, !prof !17
2: ; preds = %1
%3 = call i32 @bar()
br label %6
4: ; preds = %1
%5 = call i32 @baz()
br label %6
6: ; preds = %4, %2
%7 = tail call i32 @qux()
ret void
}
define void @foo3(i1 zeroext %0) nounwind !section_prefix !15 {
;; Check that function without profile data is not split.
; MFS-DEFAULTS-LABEL: foo3
; MFS-DEFAULTS-NOT: foo3.cold:
br i1 %0, label %2, label %4
2: ; preds = %1
%3 = call i32 @bar()
br label %6
4: ; preds = %1
%5 = call i32 @baz()
br label %6
6: ; preds = %4, %2
%7 = tail call i32 @qux()
ret void
}
define void @foo4(i1 zeroext %0, i1 zeroext %1) nounwind !prof !20 {
;; Check that count threshold works.
; MFS-OPTS1-LABEL: foo4
; MFS-OPTS1: .section .text.split.foo4
; MFS-OPTS1-NEXT: foo4.cold:
; MFS-OPTS1-X86-NOT: callq bar
; MFS-OPTS1-X86-NOT: callq baz
; MFS-OPTS1-X86-NEXT: callq bam
; MFS-OPTS1-AARCH64-NOT: bl bar
; MFS-OPTS1-AARCH64-NOT: bl baz
; MFS-OPTS1-AARCH64-NEXT: bl bam
br i1 %0, label %3, label %7, !prof !18
3:
%4 = call i32 @bar()
br label %7
5:
%6 = call i32 @baz()
br label %7
7:
br i1 %1, label %8, label %10, !prof !19
8:
%9 = call i32 @bam()
br label %12
10:
%11 = call i32 @baz()
br label %12
12:
%13 = tail call i32 @qux()
ret void
}
define void @foo5(i1 zeroext %0, i1 zeroext %1) nounwind !prof !20 {
;; Check that profile summary info cutoff works.
; MFS-OPTS2-LABEL: foo5
; MFS-OPTS2: .section .text.split.foo5
; MFS-OPTS2-NEXT: foo5.cold:
; MFS-OPTS2-X86-NOT: callq bar
; MFS-OPTS2-X86-NOT: callq baz
; MFS-OPTS2-X86-NEXT: callq bam
; MFS-OPTS2-AARCH64-NOT: bl bar
; MFS-OPTS2-AARCH64-NOT: bl baz
; MFS-OPTS2-AARCH64-NEXT: bl bam
br i1 %0, label %3, label %7, !prof !21
3:
%4 = call i32 @bar()
br label %7
5:
%6 = call i32 @baz()
br label %7
7:
br i1 %1, label %8, label %10, !prof !22
8:
%9 = call i32 @bam()
br label %12
10:
%11 = call i32 @baz()
br label %12
12:
%13 = call i32 @qux()
ret void
}
define void @foo6(i1 zeroext %0) nounwind section "nosplit" !prof !14 {
;; Check that function with section attribute is not split.
; MFS-DEFAULTS-LABEL: foo6
; MFS-DEFAULTS-NOT: foo6.cold:
br i1 %0, label %2, label %4, !prof !17
2: ; preds = %1
%3 = call i32 @bar()
br label %6
4: ; preds = %1
%5 = call i32 @baz()
br label %6
6: ; preds = %4, %2
%7 = tail call i32 @qux()
ret void
}
define i32 @foo7(i1 zeroext %0) personality ptr @__gxx_personality_v0 !prof !14 {
;; Check that a single cold ehpad is split out.
; MFS-DEFAULTS-LABEL: foo7
; MFS-DEFAULTS: .section .text.split.foo7,"ax",@progbits
; MFS-DEFAULTS-NEXT: foo7.cold:
; MFS-DEFAULTS-X86: callq baz
; MFS-DEFAULTS-X86: callq _Unwind_Resume@PLT
; MFS-DEFAULTS-AARCH64: bl baz
entry:
invoke void @_Z1fv()
to label %try.cont unwind label %lpad
lpad:
%1 = landingpad { ptr, i32 }
cleanup
catch ptr @_ZTIi
resume { ptr, i32 } %1
try.cont:
br i1 %0, label %2, label %4, !prof !17
2: ; preds = try.cont
%3 = call i32 @bar()
br label %6
4: ; preds = %1
%5 = call i32 @baz()
br label %6
6: ; preds = %4, %2
%7 = tail call i32 @qux()
ret i32 %7
}
define i32 @foo8(i1 zeroext %0) personality ptr @__gxx_personality_v0 !prof !14 {
;; Check that all ehpads are treated as hot if one of them is hot.
; MFS-DEFAULTS-LABEL: foo8
; MFS-DEFAULTS-X86: callq _Unwind_Resume@PLT
; MFS-DEFAULTS-X86: callq _Unwind_Resume@PLT
; MFS-DEFAULTS: .section .text.split.foo8,"ax",@progbits
; MFS-DEFAULTS-NEXT: foo8.cold:
; MFS-DEFAULTS-X86: callq baz
; MFS-DEFAULTS-AARCH64: bl baz
;; Check that all ehpads are by default treated as cold with -mfs-split-ehcode.
; MFS-EH-SPLIT-LABEL: foo8
; MFS-EH-SPLIT-X86: callq baz
; MFS-EH-SPLIT-AARCH64: bl baz
; MFS-EH-SPLIT-X86: .section .text.split.foo8,"ax",@progbits
; MFS-EH-SPLIT-X86-NEXT: foo8.cold:
; MFS-EH-SPLIT-X86: callq _Unwind_Resume@PLT
; MFS-EH-SPLIT-X86: callq _Unwind_Resume@PLT
entry:
invoke void @_Z1fv()
to label %try.cont unwind label %lpad1
lpad1:
%1 = landingpad { ptr, i32 }
cleanup
catch ptr @_ZTIi
resume { ptr, i32 } %1
try.cont:
br i1 %0, label %hot, label %cold, !prof !17
hot:
%2 = call i32 @bar()
invoke void @_Z1fv()
to label %exit unwind label %lpad2, !prof !21
lpad2:
%3 = landingpad { ptr, i32 }
cleanup
catch ptr @_ZTIi
resume { ptr, i32 } %3
cold:
%4 = call i32 @baz()
br label %exit
exit:
%5 = tail call i32 @qux()
ret i32 %5
}
define void @foo9(i1 zeroext %0) nounwind #0 !prof !14 {
;; Check that function with section attribute is not split.
; MFS-DEFAULTS-LABEL: foo9
; MFS-DEFAULTS-NOT: foo9.cold:
br i1 %0, label %2, label %4, !prof !17
2: ; preds = %1
%3 = call i32 @bar()
br label %6
4: ; preds = %1
%5 = call i32 @baz()
br label %6
6: ; preds = %4, %2
%7 = tail call i32 @qux()
ret void
}
define i32 @foo10(i1 zeroext %0) personality ptr @__gxx_personality_v0 !prof !14 {
;; Check that nop is inserted just before the EH pad if it's beginning a section.
; MFS-DEFAULTS-LABEL: foo10
; MFS-DEFAULTS-X86-LABEL: callq baz
; MFS-DEFAULTS-AARCH64: bl baz
; MFS-DEFAULTS-X86: .section .text.split.foo10,"ax",@progbits
; MFS-DEFAULTS-X86-NEXT: foo10.cold:
; MFS-DEFAULTS-X86: nop
; MFS-DEFAULTS-X86: callq _Unwind_Resume@PLT
entry:
invoke void @_Z1fv()
to label %try.cont unwind label %lpad, !prof !17
lpad:
%1 = landingpad { ptr, i32 }
cleanup
catch ptr @_ZTIi
resume { ptr, i32 } %1
try.cont:
%2 = call i32 @baz()
ret i32 %2
}
define void @foo11(i1 zeroext %0) personality ptr @__gxx_personality_v0 {
;; Check that function having landing pads are split with mfs-split-ehcode
;; even in the absence of profile data
; MFS-EH-SPLIT-LABEL: foo11
; MFS-EH-SPLIT-X86: .section .text.split.foo11,"ax",@progbits
; MFS-EH-SPLIT-X86-NEXT: foo11.cold:
; MFS-EH-SPLIT-X86: nop
; MFS-EH-SPLIT-X86: callq _Unwind_Resume@PLT
entry:
invoke void @_Z1fv()
to label %2 unwind label %lpad
lpad:
%1 = landingpad { ptr, i32 }
cleanup
catch ptr @_ZTIi
resume { ptr, i32 } %1
2: ; preds = entry
%3 = tail call i32 @qux()
ret void
}
define i32 @foo12(i1 zeroext %0) personality ptr @__gxx_personality_v0 !prof !14 {
;; Check that all code reachable from ehpad is split out with cycles.
; MFS-EH-SPLIT-LABEL: foo12
; MFS-EH-SPLIT: .section .text.split.foo12,"ax",@progbits
; MFS-EH-SPLIT-NEXT: foo12.cold:
; MFS-EH-SPLIT-X86: callq bar
; MFS-EH-SPLIT-X86: callq baz
; MFS-EH-SPLIT-X86: callq qux
; MFS-EH-SPLIT-AARCH64: bl bar
; MFS-EH-SPLIT-AARCH64: bl baz
; MFS-EH-SPLIT-AARCH64: bl qux
entry:
invoke void @_Z1fv()
to label %8 unwind label %lpad
lpad:
%1 = landingpad { ptr, i32 }
cleanup
catch ptr @_ZTIi
br label %2
2: ; preds = lpad
%3 = call i32 @bar()
br i1 %0, label %4, label %6
4: ; preds = lpad
%5 = call i32 @baz()
br label %6
6: ; preds = %4, %2
%7 = tail call i32 @qux()
br i1 %0, label %2, label %8
8: ; preds = %6
ret i32 0
}
define i32 @foo13(i1 zeroext %0) personality ptr @__gxx_personality_v0 !prof !14{
;; Check that all code reachable from EH
;; that is also reachable from outside EH pad
;; is not touched.
; MFS-EH-SPLIT-LABEL: foo13
; MFS-EH-SPLIT-X86: callq bam
; MFS-EH-SPLIT-AARCH64: bl bam
; MFS-EH-SPLIT: .section .text.split.foo13,"ax",@progbits
; MFS-EH-SPLIT-NEXT: foo13.cold:
; MFS-EH-SPLIT-X86: callq baz
; MFS-EH-SPLIT-X86: callq bar
; MFS-EH-SPLIT-X86: callq qux
; MFS-EH-SPLIT-AARCH64: bl baz
; MFS-EH-SPLIT-AARCH64: bl bar
; MFS-EH-SPLIT-AARCH64: bl qux
entry:
invoke void @_Z1fv()
to label %try.cont unwind label %lpad, !prof !17
lpad:
%1 = landingpad { ptr, i32 }
cleanup
catch ptr @_ZTIi
br i1 %0, label %2, label %4, !prof !17
2: ; preds = lpad
%3 = call i32 @bar()
br label %6
4: ; preds = lpad
%5 = call i32 @baz()
br label %6
6: ; preds = %4, %2
%7 = tail call i32 @qux()
br i1 %0, label %2, label %try.cont, !prof !17
try.cont: ; preds = %entry
%8 = call i32 @bam()
ret i32 %8
}
define void @foo14(i1 zeroext %0, i1 zeroext %1) nounwind !prof !24 {
; FSAFDO-MFS: .section .text.split.foo14,"ax"
; FSAFDO-MFS: foo14.cold:
br i1 %0, label %3, label %7, !prof !25
3:
%4 = call i32 @bar()
br label %7
5:
%6 = call i32 @baz()
br label %7
7:
br i1 %1, label %8, label %10, !prof !26
8:
%9 = call i32 @bam()
br label %12
10:
%11 = call i32 @baz()
br label %12
12:
%13 = tail call i32 @qux()
ret void
}
define void @foo15(i1 zeroext %0, i1 zeroext %1) nounwind !prof !27 {
;; HasAccurateProfile is false, foo15 is hot, but no profile data for
;; blocks, no split should happen.
; FSAFDO-MFS2-NOT: .section .text.split.foo15,"ax"
; FSAFDO-MFS2-NOT: foo15.cold:
br i1 %0, label %3, label %7
3:
%4 = call i32 @bar()
br label %7
5:
%6 = call i32 @baz()
br label %7
7:
br i1 %1, label %8, label %10
8:
%9 = call i32 @bam()
br label %12
10:
%11 = call i32 @baz()
br label %12
12:
%13 = tail call i32 @qux()
ret void
}
define void @foo16(i1 zeroext %0) nounwind !prof !14 !section_prefix !15 {
;; Check that an unconditional branch is only appended to a block
;; if it would fall through to the wrong block otherwise.
; MFS-O0-LABEL: foo16
; MFS-O0-X86: jmp
; MFS-O0-X86-NOT: jmp
; MFS-O0-AARCH64: b foo16.cold
; MFS-O0-AARCH64-NOT: b foo16.cold
; MFS-O0: .section .text.split.foo16
; MFS-O0-NEXT: foo16.cold
%2 = call i32 @baz()
br i1 false, label %3, label %5, !prof !25
3: ; preds = %1
%4 = call i32 @bar()
unreachable
5: ; preds = %1
%6 = tail call i32 @qux()
ret void
}
define i32 @foo17(i1 zeroext %0, i32 %a, i32 %b) nounwind !prof !14 !section_prefix !15 {
;; Check that cold blocks in functions with red zones aren't split.
; MFS-DEFAULTS-LABEL: foo17
; MFS-DEFAULTS-X86: foo17.cold:
; MFS-REDZONE-AARCH64-NOT: foo17.cold:
%a.addr = alloca i32, align 4
%b.addr = alloca i32, align 4
%x = alloca i32, align 4
br i1 %0, label %2, label %3, !prof !17
2: ; preds = %1
store i32 %a, ptr %a.addr, align 4
store i32 %b, ptr %b.addr, align 4
br label %4
3: ; preds = %1
store i32 %a, ptr %b.addr, align 4
store i32 %b, ptr %a.addr, align 4
br label %4
4: ; preds = %3, %2
%tmp = load i32, ptr %a.addr, align 4
%tmp1 = load i32, ptr %b.addr, align 4
%add = add nsw i32 %tmp, %tmp1
store i32 %add, ptr %x, align 4
%tmp2 = load i32, ptr %x, align 4
ret i32 %tmp2
}
define i32 @foo18(i32 %in) !prof !14 !section_prefix !15 {
;; Check that a cold block targeted by a jump table is not split
;; on AArch64.
; MFS-DEFAULTS-LABEL: foo18
; MFS-DEFAULTS: .section .text.split.foo18
; MFS-DEFAULTS-NEXT: foo18.cold:
; MFS-DEFAULTS-SAME: %common.ret
; MFS-DEFAULTS-X86-DAG: jmp qux
; MFS-DEFAULTS-X86-DAG: jmp bam
; MFS-DEFAULTS-AARCH64-NOT: b bar
; MFS-DEFAULTS-AARCH64-NOT: b baz
; MFS-DEFAULTS-AARCH64-NOT: b qux
; MFS-DEFAULTS-AARCH64-NOT: b bam
switch i32 %in, label %common.ret [
i32 0, label %hot1
i32 1, label %hot2
i32 2, label %cold1
i32 3, label %cold2
], !prof !28
common.ret: ; preds = %0
ret i32 0
hot1: ; preds = %0
%1 = tail call i32 @bar()
ret i32 %1
hot2: ; preds = %0
%2 = tail call i32 @baz()
ret i32 %2
cold1: ; preds = %0
%3 = tail call i32 @bam()
ret i32 %3
cold2: ; preds = %0
%4 = tail call i32 @qux()
ret i32 %4
}
define i32 @foo19(i32 %in) !prof !14 !section_prefix !15 {
;; Check that a cold block that contains a jump table dispatch is
;; not split on AArch64.
; MFS-DEFAULTS-LABEL: foo19
; MFS-DEFAULTS: .section .text.split.foo19
; MFS-DEFAULTS-NEXT: foo19.cold:
; MFS-DEFAULTS-X86: .LJTI18_0
; MFS-DEFAULTS-AARCH64-NOT: .LJTI18_0
; MFS-DEFAULTS: .section .rodata
; MFS-DEFAULTS: .LJTI18_0
%cmp = icmp sgt i32 %in, 3
br i1 %cmp, label %hot, label %cold_switch, !prof !17
hot: ; preds = %0
ret i32 1
cold_switch: ; preds = %0
switch i32 %in, label %common.ret [
i32 0, label %hot1
i32 1, label %hot2
i32 2, label %cold1
i32 3, label %cold2
], !prof !28
common.ret: ; preds = %0
ret i32 0
hot1: ; preds = %0
%1 = tail call i32 @bar()
ret i32 %1
hot2: ; preds = %0
%2 = tail call i32 @baz()
ret i32 %2
cold1: ; preds = %0
%3 = tail call i32 @bam()
ret i32 %3
cold2: ; preds = %0
%4 = tail call i32 @qux()
ret i32 %4
}
define void @foo20(i1 zeroext %0) !prof !14 !section_prefix !15 {
;; Check that blocks containing or targeted by asm goto aren't split.
; MFS-DEFAULTS-LABEL: foo20
; MFS-DEFAULTS-AARCH64-NOT: foo20.cold:
; MFS-DEFAULTS-X86: .section .text.split.foo20
; MFS-DEFAULTS-X86: foo20.cold:
; MFS-DEFAULTS-X86-DAG: # %cold_asm
; MFS-DEFAULTS-X86-DAG: # %cold_asm_target
br i1 %0, label %hot, label %cold_asm, !prof !17
hot:
%2 = call i32 @bar()
ret void
cold_asm:
callbr void asm sideeffect "nop", "!i"() #3
to label %asm.fallthrough [label %cold_asm_target]
asm.fallthrough:
br label %cold_asm_target
cold_asm_target:
%3 = call i32 @baz()
ret void
}
declare i32 @bar()
declare i32 @baz()
declare i32 @bam()
declare i32 @qux()
declare void @_Z1fv()
declare i32 @__gxx_personality_v0(...)
@_ZTIi = external constant ptr
attributes #0 = { "implicit-section-name"="nosplit" }
!llvm.module.flags = !{!0}
!0 = !{i32 1, !"ProfileSummary", !1}
!1 = !{!2, !3, !4, !5, !6, !7, !8, !9}
!2 = !{!"ProfileFormat", !"InstrProf"}
!3 = !{!"TotalCount", i64 10000}
!4 = !{!"MaxCount", i64 10}
!5 = !{!"MaxInternalCount", i64 1}
!6 = !{!"MaxFunctionCount", i64 1000}
!7 = !{!"NumCounts", i64 3}
!8 = !{!"NumFunctions", i64 5}
!9 = !{!"DetailedSummary", !10}
!10 = !{!11, !12, !13}
!11 = !{i32 10000, i64 100, i32 1}
!12 = !{i32 999900, i64 100, i32 1}
!13 = !{i32 999999, i64 1, i32 2}
!14 = !{!"function_entry_count", i64 7000}
!15 = !{!"function_section_prefix", !"hot"}
!16 = !{!"function_section_prefix", !"unlikely"}
!17 = !{!"branch_weights", i32 7000, i32 0}
!18 = !{!"branch_weights", i32 3000, i32 4000}
!19 = !{!"branch_weights", i32 1000, i32 6000}
!20 = !{!"function_entry_count", i64 10000}
!21 = !{!"branch_weights", i32 6000, i32 4000}
!22 = !{!"branch_weights", i32 80, i32 9920}
!23 = !{!"function_entry_count", i64 7}
!24 = !{!"function_entry_count", i64 10000}
!25 = !{!"branch_weights", i32 0, i32 7000}
!26 = !{!"branch_weights", i32 1000, i32 6000}
!27 = !{!"function_entry_count", i64 10000}
!28 = !{!"branch_weights", i32 0, i32 4000, i32 4000, i32 0, i32 0}
|