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
|
; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/pseudo-probe-icp-factor.prof -S -sample-profile-prioritized-inline=1 2>&1 | FileCheck %s
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
; Function Attrs: nounwind uwtable
define dso_local i32 @bar(i32 %arg) #0 !dbg !13 {
bb:
%i = alloca i32, align 4
store i32 %arg, ptr %i, align 4, !tbaa !19
call void @llvm.dbg.declare(metadata ptr %i, metadata !18, metadata !DIExpression()), !dbg !23
call void @llvm.pseudoprobe(i64 -2012135647395072713, i64 1, i32 0, i64 -1), !dbg !24
%i1 = load i32, ptr %i, align 4, !dbg !24, !tbaa !19
%i2 = add nsw i32 %i1, 1, !dbg !24
store i32 %i2, ptr %i, align 4, !dbg !24, !tbaa !19
%i3 = load i32, ptr %i, align 4, !dbg !25, !tbaa !19
%i4 = add nsw i32 %i3, 1, !dbg !26
ret i32 %i4, !dbg !27
}
; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
; Function Attrs: nounwind uwtable
define dso_local i32 @baz(i32 %arg) #0 !dbg !28 {
bb:
%i = alloca i32, align 4
store i32 %arg, ptr %i, align 4, !tbaa !19
call void @llvm.dbg.declare(metadata ptr %i, metadata !30, metadata !DIExpression()), !dbg !31
call void @llvm.pseudoprobe(i64 7546896869197086323, i64 1, i32 0, i64 -1), !dbg !32
%i1 = load i32, ptr %i, align 4, !dbg !32, !tbaa !19
%i2 = add nsw i32 %i1, 10, !dbg !33
ret i32 %i2, !dbg !34
}
; Function Attrs: nounwind uwtable
define dso_local i32 @foo(i32 %arg, ptr %arg1) #0 !dbg !35 {
bb:
%i = alloca i32, align 4
%i2 = alloca ptr, align 8
store i32 %arg, ptr %i, align 4, !tbaa !19
call void @llvm.dbg.declare(metadata ptr %i, metadata !42, metadata !DIExpression()), !dbg !44
store ptr %arg1, ptr %i2, align 8, !tbaa !45
call void @llvm.dbg.declare(metadata ptr %i2, metadata !43, metadata !DIExpression()), !dbg !47
call void @llvm.pseudoprobe(i64 6699318081062747564, i64 1, i32 0, i64 -1), !dbg !48
%i3 = load ptr, ptr %i2, align 8, !dbg !48, !tbaa !45
%i4 = load i32, ptr %i, align 4, !dbg !49, !tbaa !19
%i6 = call i32 (i32, ...) %i3(i32 %i4), !dbg !50
ret i32 %i6, !dbg !52
}
; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 !dbg !53 {
bb:
%i = alloca i32, align 4
%i1 = alloca ptr, align 8
%i2 = alloca i32, align 4
%i3 = alloca i32, align 4
store i32 0, ptr %i, align 4
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 1, i32 0, i64 -1), !dbg !62
call void @llvm.lifetime.start.p0(i64 8, ptr %i1), !dbg !62
call void @llvm.dbg.declare(metadata ptr %i1, metadata !57, metadata !DIExpression()), !dbg !63
call void @llvm.lifetime.start.p0(i64 4, ptr %i2), !dbg !64
call void @llvm.dbg.declare(metadata ptr %i2, metadata !59, metadata !DIExpression()), !dbg !65
store i32 0, ptr %i2, align 4, !dbg !65, !tbaa !19
call void @llvm.lifetime.start.p0(i64 4, ptr %i3), !dbg !66
call void @llvm.dbg.declare(metadata ptr %i3, metadata !60, metadata !DIExpression()), !dbg !67
store i32 0, ptr %i3, align 4, !dbg !67, !tbaa !19
br label %bb7, !dbg !66
bb7: ; preds = %bb25, %bb
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 2, i32 0, i64 -1), !dbg !68
%i8 = load i32, ptr %i3, align 4, !dbg !68, !tbaa !19
%i9 = icmp slt i32 %i8, 1000000000, !dbg !70
br i1 %i9, label %bb12, label %bb10, !dbg !71
bb10: ; preds = %bb7
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 3, i32 0, i64 -1), !dbg !72
call void @llvm.lifetime.end.p0(i64 4, ptr %i3), !dbg !72
br label %bb28
bb12: ; preds = %bb7
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 4, i32 0, i64 -1), !dbg !73
%i13 = load i32, ptr %i3, align 4, !dbg !73, !tbaa !19
%i14 = srem i32 %i13, 100, !dbg !76
%i15 = icmp eq i32 %i14, 0, !dbg !77
br i1 %i15, label %bb16, label %bb17, !dbg !78
bb16: ; preds = %bb12
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 5, i32 0, i64 -1), !dbg !79
store ptr @bar, ptr %i1, align 8, !dbg !79, !tbaa !45
br label %bb18, !dbg !80
bb17: ; preds = %bb12
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 6, i32 0, i64 -1), !dbg !81
store ptr @baz, ptr %i1, align 8, !dbg !81, !tbaa !45
br label %bb18
bb18: ; preds = %bb17, %bb16
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 7, i32 0, i64 -1), !dbg !82
%i19 = load i32, ptr %i3, align 4, !dbg !82, !tbaa !19
%i20 = load ptr, ptr %i1, align 8, !dbg !83, !tbaa !45
%i22 = call i32 @foo(i32 %i19, ptr %i20), !dbg !84
%i23 = load i32, ptr %i2, align 4, !dbg !86, !tbaa !19
%i24 = add nsw i32 %i23, %i22, !dbg !86
store i32 %i24, ptr %i2, align 4, !dbg !86, !tbaa !19
br label %bb25, !dbg !87
bb25: ; preds = %bb18
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 8, i32 0, i64 -1), !dbg !88
%i26 = load i32, ptr %i3, align 4, !dbg !88, !tbaa !19
%i27 = add nsw i32 %i26, 1, !dbg !88
store i32 %i27, ptr %i3, align 4, !dbg !88, !tbaa !19
br label %bb7, !dbg !72, !llvm.loop !89
bb28: ; preds = %bb10
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 9, i32 0, i64 -1), !dbg !92
%i29 = load i32, ptr %i2, align 4, !dbg !92, !tbaa !19
%i30 = call i32 (ptr, ...) @printf(ptr @.str, i32 %i29), !dbg !93
call void @llvm.lifetime.end.p0(i64 4, ptr %i2), !dbg !95
call void @llvm.lifetime.end.p0(i64 8, ptr %i1), !dbg !95
ret i32 0, !dbg !96
}
; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2
; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2
declare dso_local i32 @printf(ptr, ...)
; Function Attrs: nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: readwrite)
declare void @llvm.pseudoprobe(i64, i64, i32, i64) #3
attributes #0 = { nounwind uwtable "disable-tail-calls"="true" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "unsafe-fp-math"="false" "use-sample-profile" "use-soft-float"="false" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: readwrite) }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6, !7}
!llvm.ident = !{!8}
!llvm.pseudo_probe_desc = !{!9, !10, !11, !12}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 13.0.06)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "test.c", directory: "")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{i32 1, !"ThinLTO", i32 0}
!7 = !{i32 1, !"EnableSplitLTOUnit", i32 1}
!8 = !{!"clang version 13.0.0 "}
!9 = !{i64 -2012135647395072713, i64 4294967295, !"bar", null}
!10 = !{i64 7546896869197086323, i64 4294967295, !"baz", null}
!11 = !{i64 6699318081062747564, i64 281479271677951, !"foo", null}
!12 = !{i64 -2624081020897602054, i64 563125815542069, !"main", null}
!13 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 2, type: !14, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !17)
!14 = !DISubroutineType(types: !15)
!15 = !{!16, !16}
!16 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!17 = !{!18}
!18 = !DILocalVariable(name: "x", arg: 1, scope: !13, file: !1, line: 2, type: !16)
!19 = !{!20, !20, i64 0}
!20 = !{!"int", !21, i64 0}
!21 = !{!"omnipotent char", !22, i64 0}
!22 = !{!"Simple C/C++ TBAA"}
!23 = !DILocation(line: 2, column: 13, scope: !13)
!24 = !DILocation(line: 4, column: 7, scope: !13)
!25 = !DILocation(line: 5, column: 12, scope: !13)
!26 = !DILocation(line: 5, column: 14, scope: !13)
!27 = !DILocation(line: 5, column: 5, scope: !13)
!28 = distinct !DISubprogram(name: "baz", scope: !1, file: !1, line: 9, type: !14, scopeLine: 9, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !29)
!29 = !{!30}
!30 = !DILocalVariable(name: "x", arg: 1, scope: !28, file: !1, line: 9, type: !16)
!31 = !DILocation(line: 9, column: 13, scope: !28)
!32 = !DILocation(line: 10, column: 10, scope: !28)
!33 = !DILocation(line: 10, column: 12, scope: !28)
!34 = !DILocation(line: 10, column: 3, scope: !28)
!35 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 13, type: !36, scopeLine: 13, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !41)
!36 = !DISubroutineType(types: !37)
!37 = !{!16, !16, !38}
!38 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !39, size: 64)
!39 = !DISubroutineType(types: !40)
!40 = !{!16, null}
!41 = !{!42, !43}
!42 = !DILocalVariable(name: "x", arg: 1, scope: !35, file: !1, line: 13, type: !16)
!43 = !DILocalVariable(name: "f", arg: 2, scope: !35, file: !1, line: 13, type: !38)
!44 = !DILocation(line: 13, column: 13, scope: !35)
!45 = !{!46, !46, i64 0}
!46 = !{!"any pointer", !21, i64 0}
!47 = !DILocation(line: 13, column: 22, scope: !35)
!48 = !DILocation(line: 14, column: 10, scope: !35)
!49 = !DILocation(line: 14, column: 12, scope: !35)
!50 = !DILocation(line: 14, column: 10, scope: !51)
;; A discriminator of 108527639 which is 0x6780017 in hexdecimal, stands for an indirect call probe
;; with an index of 2 and probe factor of 0.79.
!51 = !DILexicalBlockFile(scope: !35, file: !1, discriminator: 108527639)
!52 = !DILocation(line: 14, column: 3, scope: !35)
!53 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 17, type: !54, scopeLine: 18, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !56)
!54 = !DISubroutineType(types: !55)
!55 = !{!16}
!56 = !{!57, !59, !60}
!57 = !DILocalVariable(name: "x", scope: !53, file: !1, line: 19, type: !58)
!58 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64)
!59 = !DILocalVariable(name: "sum", scope: !53, file: !1, line: 25, type: !16)
!60 = !DILocalVariable(name: "i", scope: !61, file: !1, line: 26, type: !16)
!61 = distinct !DILexicalBlock(scope: !53, file: !1, line: 26, column: 5)
!62 = !DILocation(line: 19, column: 3, scope: !53)
!63 = !DILocation(line: 19, column: 9, scope: !53)
!64 = !DILocation(line: 25, column: 5, scope: !53)
!65 = !DILocation(line: 25, column: 9, scope: !53)
!66 = !DILocation(line: 26, column: 10, scope: !61)
!67 = !DILocation(line: 26, column: 14, scope: !61)
!68 = !DILocation(line: 26, column: 21, scope: !69)
!69 = distinct !DILexicalBlock(scope: !61, file: !1, line: 26, column: 5)
!70 = !DILocation(line: 26, column: 23, scope: !69)
!71 = !DILocation(line: 26, column: 5, scope: !61)
!72 = !DILocation(line: 26, column: 5, scope: !69)
!73 = !DILocation(line: 27, column: 10, scope: !74)
!74 = distinct !DILexicalBlock(scope: !75, file: !1, line: 27, column: 10)
!75 = distinct !DILexicalBlock(scope: !69, file: !1, line: 26, column: 45)
!76 = !DILocation(line: 27, column: 12, scope: !74)
!77 = !DILocation(line: 27, column: 19, scope: !74)
!78 = !DILocation(line: 27, column: 10, scope: !75)
!79 = !DILocation(line: 28, column: 11, scope: !74)
!80 = !DILocation(line: 28, column: 9, scope: !74)
!81 = !DILocation(line: 30, column: 11, scope: !74)
!82 = !DILocation(line: 32, column: 17, scope: !75)
!83 = !DILocation(line: 32, column: 20, scope: !75)
!84 = !DILocation(line: 32, column: 13, scope: !85)
;; A discriminator of 116916311 which is 0x6f80057 in hexdecimal, stands for an indirect call probe
;; with an index of 10 and probe factor of 0.95.
!85 = !DILexicalBlockFile(scope: !75, file: !1, discriminator: 116916311)
!86 = !DILocation(line: 32, column: 11, scope: !75)
!87 = !DILocation(line: 33, column: 5, scope: !75)
!88 = !DILocation(line: 26, column: 41, scope: !69)
!89 = distinct !{!89, !71, !90, !91}
!90 = !DILocation(line: 33, column: 5, scope: !61)
!91 = !{!"llvm.loop.mustprogress"}
!92 = !DILocation(line: 34, column: 21, scope: !53)
!93 = !DILocation(line: 34, column: 5, scope: !94)
!94 = !DILexicalBlockFile(scope: !53, file: !1, discriminator: 104333335)
!95 = !DILocation(line: 36, column: 1, scope: !53)
!96 = !DILocation(line: 35, column: 5, scope: !53)
; CHECK: define dso_local i32 @main
; CHECK: %{{.+}} = call i32 (i32, ...) %{{.+}}(i32 %{{.+}}) #[[#]], !dbg ![[#DBGID:]], !prof ![[#PROF:]]
;; A discriminator of 106430487 which is 0x6580017 in hexdecimal, stands for an indirect call probe
;; with an index of 2 and probe factor of 0.75, which is from 0.95 * 0.79.
; CHECK: ![[#DBGID]] = !DILocation(line: [[#]], column: [[#]], scope: ![[#SCOPE:]], inlinedAt: ![[#]])
; CHECK: ![[#SCOPE]] = !DILexicalBlockFile(scope: ![[#]], file: ![[#]], discriminator: 106430487)
;; The remaining count of the second target (bar) should be from the original count multiplied by two callsite
;; factors, i.e, roughly 11259 * 0.95 * 0.79 = 8444.
; CHECK: ![[#PROF]] = !{!"VP", i32 0, i64 8444, i64 7546896869197086323, i64 -1, i64 -2012135647395072713, i64 8444}
|
