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
| ; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/remarks.prof -S -pass-remarks=sample-profile -pass-remarks-output=%t.opt.yaml 2>&1 | FileCheck %s
; RUN: FileCheck %s -check-prefix=YAML < %t.opt.yaml
; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/remarks.prof -S -pass-remarks=sample-profile -pass-remarks-output=%t.opt.yaml 2>&1 | FileCheck %s
; RUN: FileCheck %s -check-prefix=YAML < %t.opt.yaml
; Original test case.
;
; 1 #include <stdlib.h>
; 2
; 3 long long foo() {
; 4 long long int sum = 0;
; 5 for (int i = 0; i < 500000000; i++)
; 6 if (i < 1000)
; 7 sum -= i;
; 8 else
; 9 sum += -i * rand();
; 10 return sum;
; 11 }
; 12
; 13 int main() { return foo() > 0; }
; We are expecting foo() to be inlined in main() (almost all the cycles are
; spent inside foo).
; CHECK: remark: remarks.cc:13:21: inlined hot callee '_Z3foov' into 'main'
; The back edge for the loop is the hottest edge in the loop subgraph.
; CHECK: remark: remarks.cc:6:9: most popular destination for conditional branches at remarks.cc:5:3
; The predicate almost always chooses the 'else' branch.
; CHECK: remark: remarks.cc:9:15: most popular destination for conditional branches at remarks.cc:6:9
; Checking to see if YAML file is generated and contains remarks
;YAML: --- !Passed
;YAML-NEXT: Pass: sample-profile
;YAML-NEXT: Name: HotInline
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 13, Column: 21 }
;YAML-NEXT: Function: main
;YAML-NEXT: Args:
;YAML-NEXT: - String: 'inlined hot callee '''
;YAML-NEXT: - Callee: _Z3foov
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 3, Column: 0 }
;YAML-NEXT: - String: ''' into '''
;YAML-NEXT: - Caller: main
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 13, Column: 0 }
;YAML-NEXT: - String: ''''
;YAML-NEXT: ...
;YAML: --- !Analysis
;YAML-NEXT: Pass: sample-profile
;YAML-NEXT: Name: AppliedSamples
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 5, Column: 8 }
;YAML-NEXT: Function: main
;YAML-NEXT: Args:
;YAML-NEXT: - String: 'Applied '
;YAML-NEXT: - NumSamples: '18305'
;YAML-NEXT: - String: ' samples from profile (offset: '
;YAML-NEXT: - LineOffset: '2'
;YAML-NEXT: - String: ')'
;YAML-NEXT: ...
;YAML: --- !Passed
;YAML-NEXT: Pass: sample-profile
;YAML-NEXT: Name: PopularDest
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 6, Column: 9 }
;YAML-NEXT: Function: main
;YAML-NEXT: Args:
;YAML-NEXT: - String: 'most popular destination for conditional branches at '
;YAML-NEXT: - CondBranchesLoc: 'remarks.cc:5:3'
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 5, Column: 3 }
;YAML-NEXT: ...
; Function Attrs: nounwind uwtable
define i64 @_Z3foov() #0 !dbg !4 {
entry:
%sum = alloca i64, align 8
%i = alloca i32, align 4
%0 = bitcast i64* %sum to i8*, !dbg !19
call void @llvm.lifetime.start.p0i8(i64 8, i8* %0) #4, !dbg !19
call void @llvm.dbg.declare(metadata i64* %sum, metadata !9, metadata !20), !dbg !21
store i64 0, i64* %sum, align 8, !dbg !21, !tbaa !22
%1 = bitcast i32* %i to i8*, !dbg !26
call void @llvm.lifetime.start.p0i8(i64 4, i8* %1) #4, !dbg !26
call void @llvm.dbg.declare(metadata i32* %i, metadata !10, metadata !20), !dbg !27
store i32 0, i32* %i, align 4, !dbg !27, !tbaa !28
br label %for.cond, !dbg !26
for.cond: ; preds = %for.inc, %entry
%2 = load i32, i32* %i, align 4, !dbg !30, !tbaa !28
%cmp = icmp slt i32 %2, 500000000, !dbg !34
br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !35
for.cond.cleanup: ; preds = %for.cond
%3 = bitcast i32* %i to i8*, !dbg !36
call void @llvm.lifetime.end.p0i8(i64 4, i8* %3) #4, !dbg !36
br label %for.end
for.body: ; preds = %for.cond
%4 = load i32, i32* %i, align 4, !dbg !38, !tbaa !28
%cmp1 = icmp slt i32 %4, 1000, !dbg !40
br i1 %cmp1, label %if.then, label %if.else, !dbg !41
if.then: ; preds = %for.body
%5 = load i32, i32* %i, align 4, !dbg !42, !tbaa !28
%conv = sext i32 %5 to i64, !dbg !42
%6 = load i64, i64* %sum, align 8, !dbg !43, !tbaa !22
%sub = sub nsw i64 %6, %conv, !dbg !43
store i64 %sub, i64* %sum, align 8, !dbg !43, !tbaa !22
br label %if.end, !dbg !44
if.else: ; preds = %for.body
%7 = load i32, i32* %i, align 4, !dbg !45, !tbaa !28
%sub2 = sub nsw i32 0, %7, !dbg !46
%call = call i32 @rand() #4, !dbg !47
%mul = mul nsw i32 %sub2, %call, !dbg !48
%conv3 = sext i32 %mul to i64, !dbg !46
%8 = load i64, i64* %sum, align 8, !dbg !49, !tbaa !22
%add = add nsw i64 %8, %conv3, !dbg !49
store i64 %add, i64* %sum, align 8, !dbg !49, !tbaa !22
br label %if.end
if.end: ; preds = %if.else, %if.then
br label %for.inc, !dbg !50
for.inc: ; preds = %if.end
%9 = load i32, i32* %i, align 4, !dbg !51, !tbaa !28
%inc = add nsw i32 %9, 1, !dbg !51
store i32 %inc, i32* %i, align 4, !dbg !51, !tbaa !28
br label %for.cond, !dbg !52
for.end: ; preds = %for.cond.cleanup
%10 = load i64, i64* %sum, align 8, !dbg !53, !tbaa !22
%11 = bitcast i64* %sum to i8*, !dbg !54
call void @llvm.lifetime.end.p0i8(i64 8, i8* %11) #4, !dbg !54
ret i64 %10, !dbg !55
}
; Function Attrs: nounwind argmemonly
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
; Function Attrs: nounwind
declare i32 @rand() #3
; Function Attrs: nounwind argmemonly
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
; Function Attrs: nounwind uwtable
define i32 @main() #0 !dbg !13 {
entry:
%retval = alloca i32, align 4
store i32 0, i32* %retval, align 4
%call = call i64 @_Z3foov(), !dbg !56
%cmp = icmp sgt i64 %call, 0, !dbg !57
%conv = zext i1 %cmp to i32, !dbg !56
ret i32 %conv, !dbg !58
}
attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind argmemonly }
attributes #2 = { nounwind readnone }
attributes #3 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #4 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!16, !17}
!llvm.ident = !{!18}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 251041) (llvm/trunk 251053)", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
!1 = !DIFile(filename: "remarks.cc", directory: ".")
!2 = !{}
!4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)
!5 = !DISubroutineType(types: !6)
!6 = !{!7}
!7 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed)
!8 = !{!9, !10}
!9 = !DILocalVariable(name: "sum", scope: !4, file: !1, line: 4, type: !7)
!10 = !DILocalVariable(name: "i", scope: !11, file: !1, line: 5, type: !12)
!11 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 3)
!12 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!13 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 13, type: !14, isLocal: false, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
!14 = !DISubroutineType(types: !15)
!15 = !{!12}
!16 = !{i32 2, !"Dwarf Version", i32 4}
!17 = !{i32 2, !"Debug Info Version", i32 3}
!18 = !{!"clang version 3.8.0 (trunk 251041) (llvm/trunk 251053)"}
!19 = !DILocation(line: 4, column: 3, scope: !4)
!20 = !DIExpression()
!21 = !DILocation(line: 4, column: 17, scope: !4)
!22 = !{!23, !23, i64 0}
!23 = !{!"long long", !24, i64 0}
!24 = !{!"omnipotent char", !25, i64 0}
!25 = !{!"Simple C/C++ TBAA"}
!26 = !DILocation(line: 5, column: 8, scope: !11)
!27 = !DILocation(line: 5, column: 12, scope: !11)
!28 = !{!29, !29, i64 0}
!29 = !{!"int", !24, i64 0}
!30 = !DILocation(line: 5, column: 19, scope: !31)
!31 = !DILexicalBlockFile(scope: !32, file: !1, discriminator: 3)
!32 = !DILexicalBlockFile(scope: !33, file: !1, discriminator: 1)
!33 = distinct !DILexicalBlock(scope: !11, file: !1, line: 5, column: 3)
!34 = !DILocation(line: 5, column: 21, scope: !33)
!35 = !DILocation(line: 5, column: 3, scope: !11)
!36 = !DILocation(line: 5, column: 3, scope: !37)
!37 = !DILexicalBlockFile(scope: !33, file: !1, discriminator: 2)
!38 = !DILocation(line: 6, column: 9, scope: !39)
!39 = distinct !DILexicalBlock(scope: !33, file: !1, line: 6, column: 9)
!40 = !DILocation(line: 6, column: 11, scope: !39)
!41 = !DILocation(line: 6, column: 9, scope: !33)
!42 = !DILocation(line: 7, column: 14, scope: !39)
!43 = !DILocation(line: 7, column: 11, scope: !39)
!44 = !DILocation(line: 7, column: 7, scope: !39)
!45 = !DILocation(line: 9, column: 15, scope: !39)
!46 = !DILocation(line: 9, column: 14, scope: !39)
!47 = !DILocation(line: 9, column: 19, scope: !39)
!48 = !DILocation(line: 9, column: 17, scope: !39)
!49 = !DILocation(line: 9, column: 11, scope: !39)
!50 = !DILocation(line: 6, column: 13, scope: !39)
!51 = !DILocation(line: 5, column: 35, scope: !33)
!52 = !DILocation(line: 5, column: 3, scope: !33)
!53 = !DILocation(line: 10, column: 10, scope: !4)
!54 = !DILocation(line: 11, column: 1, scope: !4)
!55 = !DILocation(line: 10, column: 3, scope: !4)
!56 = !DILocation(line: 13, column: 21, scope: !13)
!57 = !DILocation(line: 13, column: 27, scope: !13)
!58 = !DILocation(line: 13, column: 14, scope: !13)
|