1 ; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/gcc-simple.afdo -S | FileCheck %s
7 ; long long int foo(long i) {
8 ; if (rand() < 500) return 2; else if (rand() > 5000) return 10; else return 90;
12 ; long long int sum = 0;
13 ; for (int k = 0; k < 3000; k++)
14 ; for (int i = 0; i < 200000; i++) sum += foo(i);
15 ; return sum > 0 ? 0 : 1;
18 ; This test was compiled down to bytecode at -O0 to avoid inlining foo() into
19 ; main(). The profile was generated using a GCC-generated binary (also compiled
20 ; at -O0). The conversion from the Linux Perf profile to the GCC autofdo
21 ; profile used the converter at https://github.com/google/autofdo
23 ; $ gcc -g -O0 gcc-simple.cc -o gcc-simple
24 ; $ perf record -b ./gcc-simple
25 ; $ create_gcov --binary=gcc-simple --gcov=gcc-simple.afdo
27 define i64 @_Z3fool(i64 %i) #0 !dbg !4 {
28 ; CHECK: !prof ![[EC1:[0-9]+]]
30 %retval = alloca i64, align 8
31 %i.addr = alloca i64, align 8
32 store i64 %i, ptr %i.addr, align 8
33 call void @llvm.dbg.declare(metadata ptr %i.addr, metadata !16, metadata !17), !dbg !18
34 %call = call i32 @rand() #3, !dbg !19
35 ; CHECK: !prof ![[PROF1:[0-9]+]]
36 %cmp = icmp slt i32 %call, 500, !dbg !21
37 br i1 %cmp, label %if.then, label %if.else, !dbg !22
38 ; CHECK: !prof ![[PROF2:[0-9]+]]
40 if.then: ; preds = %entry
41 store i64 2, ptr %retval, align 8, !dbg !23
42 br label %return, !dbg !23
44 if.else: ; preds = %entry
45 %call1 = call i32 @rand() #3, !dbg !25
46 ; CHECK: !prof ![[PROF3:[0-9]+]]
47 %cmp2 = icmp sgt i32 %call1, 5000, !dbg !28
48 br i1 %cmp2, label %if.then.3, label %if.else.4, !dbg !29
49 ; CHECK: !prof ![[PROF4:[0-9]+]]
51 if.then.3: ; preds = %if.else
52 store i64 10, ptr %retval, align 8, !dbg !30
53 br label %return, !dbg !30
55 if.else.4: ; preds = %if.else
56 store i64 90, ptr %retval, align 8, !dbg !32
57 br label %return, !dbg !32
59 return: ; preds = %if.else.4, %if.then.3, %if.then
60 %0 = load i64, ptr %retval, align 8, !dbg !34
64 ; Function Attrs: nounwind readnone
65 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
67 ; Function Attrs: nounwind
68 declare i32 @rand() #2
70 ; Function Attrs: nounwind uwtable
71 define i32 @main() #0 !dbg !9 {
72 ; CHECK: !prof ![[EC2:[0-9]+]]
74 %retval = alloca i32, align 4
75 %sum = alloca i64, align 8
76 %k = alloca i32, align 4
77 %i = alloca i32, align 4
78 store i32 0, ptr %retval, align 4
79 call void @llvm.dbg.declare(metadata ptr %sum, metadata !35, metadata !17), !dbg !36
80 store i64 0, ptr %sum, align 8, !dbg !36
81 call void @llvm.dbg.declare(metadata ptr %k, metadata !37, metadata !17), !dbg !39
82 store i32 0, ptr %k, align 4, !dbg !39
83 br label %for.cond, !dbg !40
85 for.cond: ; preds = %for.inc.4, %entry
86 %0 = load i32, ptr %k, align 4, !dbg !41
87 %cmp = icmp slt i32 %0, 3000, !dbg !45
88 br i1 %cmp, label %for.body, label %for.end.6, !dbg !46
89 ; CHECK: !prof ![[PROF6:[0-9]+]]
91 for.body: ; preds = %for.cond
92 call void @llvm.dbg.declare(metadata ptr %i, metadata !47, metadata !17), !dbg !49
93 store i32 0, ptr %i, align 4, !dbg !49
94 br label %for.cond.1, !dbg !50
96 for.cond.1: ; preds = %for.inc, %for.body
97 %1 = load i32, ptr %i, align 4, !dbg !51
98 %cmp2 = icmp slt i32 %1, 200000, !dbg !55
99 br i1 %cmp2, label %for.body.3, label %for.end, !dbg !56
100 ; CHECK: !prof ![[PROF7:[0-9]+]]
102 for.body.3: ; preds = %for.cond.1
103 %2 = load i32, ptr %i, align 4, !dbg !57
104 %conv = sext i32 %2 to i64, !dbg !57
105 %call = call i64 @_Z3fool(i64 %conv), !dbg !59
106 ; CHECK: !prof ![[PROF8:[0-9]+]]
107 %3 = load i64, ptr %sum, align 8, !dbg !60
108 %add = add nsw i64 %3, %call, !dbg !60
109 store i64 %add, ptr %sum, align 8, !dbg !60
110 br label %for.inc, !dbg !61
112 for.inc: ; preds = %for.body.3
113 %4 = load i32, ptr %i, align 4, !dbg !62
114 %inc = add nsw i32 %4, 1, !dbg !62
115 store i32 %inc, ptr %i, align 4, !dbg !62
116 br label %for.cond.1, !dbg !64
118 for.end: ; preds = %for.cond.1
119 br label %for.inc.4, !dbg !65
121 for.inc.4: ; preds = %for.end
122 %5 = load i32, ptr %k, align 4, !dbg !67
123 %inc5 = add nsw i32 %5, 1, !dbg !67
124 store i32 %inc5, ptr %k, align 4, !dbg !67
125 br label %for.cond, !dbg !68
127 for.end.6: ; preds = %for.cond
128 %6 = load i64, ptr %sum, align 8, !dbg !69
129 %cmp7 = icmp sgt i64 %6, 0, !dbg !70
130 %cond = select i1 %cmp7, i32 0, i32 1, !dbg !69
131 ret i32 %cond, !dbg !71
134 ; CHECK: ![[EC1]] = !{!"function_entry_count", i64 24109}
135 ; CHECK: ![[PROF1]] = !{!"branch_weights", i32 24109}
136 ; CHECK: ![[PROF2]] = !{!"branch_weights", i32 30125, i32 30125}
137 ; CHECK: ![[PROF3]] = !{!"branch_weights", i32 30124}
138 ; CHECK: ![[PROF4]] = !{!"branch_weights", i32 30125, i32 29580}
139 ; CHECK: ![[EC2]] = !{!"function_entry_count", i64 1}
140 ; CHECK: ![[PROF6]] = !{!"branch_weights", i32 1, i32 2}
141 ; CHECK: ![[PROF7]] = !{!"branch_weights", i32 18943, i32 1}
142 ; CHECK: ![[PROF8]] = !{!"branch_weights", i32 18942}
144 attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" "use-sample-profile" }
145 attributes #1 = { nounwind readnone }
146 attributes #2 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
147 attributes #3 = { nounwind }
150 !llvm.module.flags = !{!13, !14}
153 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 247554) (llvm/trunk 247557)", isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
154 !1 = !DIFile(filename: "discriminator.cc", directory: "/usr/local/google/home/dnovillo/llvm/test/autofdo")
156 !4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fool", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
157 !5 = !DISubroutineType(types: !6)
159 !7 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed)
160 !8 = !DIBasicType(name: "long int", size: 64, align: 64, encoding: DW_ATE_signed)
161 !9 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 7, type: !10, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
162 !10 = !DISubroutineType(types: !11)
164 !12 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
165 !13 = !{i32 2, !"Dwarf Version", i32 4}
166 !14 = !{i32 2, !"Debug Info Version", i32 3}
167 !15 = !{!"clang version 3.8.0 (trunk 247554) (llvm/trunk 247557)"}
168 !16 = !DILocalVariable(name: "i", arg: 1, scope: !4, file: !1, line: 3, type: !8)
169 !17 = !DIExpression()
170 !18 = !DILocation(line: 3, column: 24, scope: !4)
171 !19 = !DILocation(line: 4, column: 7, scope: !20)
172 !20 = distinct !DILexicalBlock(scope: !4, file: !1, line: 4, column: 7)
173 !21 = !DILocation(line: 4, column: 14, scope: !20)
174 !22 = !DILocation(line: 4, column: 7, scope: !4)
175 !23 = !DILocation(line: 4, column: 21, scope: !24)
176 !24 = !DILexicalBlockFile(scope: !20, file: !1, discriminator: 1)
177 !25 = !DILocation(line: 4, column: 40, scope: !26)
178 !26 = !DILexicalBlockFile(scope: !27, file: !1, discriminator: 2)
179 !27 = distinct !DILexicalBlock(scope: !20, file: !1, line: 4, column: 40)
180 !28 = !DILocation(line: 4, column: 47, scope: !27)
181 !29 = !DILocation(line: 4, column: 40, scope: !20)
182 !30 = !DILocation(line: 4, column: 55, scope: !31)
183 !31 = !DILexicalBlockFile(scope: !27, file: !1, discriminator: 3)
184 !32 = !DILocation(line: 4, column: 71, scope: !33)
185 !33 = !DILexicalBlockFile(scope: !27, file: !1, discriminator: 4)
186 !34 = !DILocation(line: 5, column: 1, scope: !4)
187 !35 = !DILocalVariable(name: "sum", scope: !9, file: !1, line: 8, type: !7)
188 !36 = !DILocation(line: 8, column: 17, scope: !9)
189 !37 = !DILocalVariable(name: "k", scope: !38, file: !1, line: 9, type: !12)
190 !38 = distinct !DILexicalBlock(scope: !9, file: !1, line: 9, column: 3)
191 !39 = !DILocation(line: 9, column: 12, scope: !38)
192 !40 = !DILocation(line: 9, column: 8, scope: !38)
193 !41 = !DILocation(line: 9, column: 19, scope: !42)
194 !42 = !DILexicalBlockFile(scope: !43, file: !1, discriminator: 2)
195 !43 = !DILexicalBlockFile(scope: !44, file: !1, discriminator: 1)
196 !44 = distinct !DILexicalBlock(scope: !38, file: !1, line: 9, column: 3)
197 !45 = !DILocation(line: 9, column: 21, scope: !44)
198 !46 = !DILocation(line: 9, column: 3, scope: !38)
199 !47 = !DILocalVariable(name: "i", scope: !48, file: !1, line: 10, type: !12)
200 !48 = distinct !DILexicalBlock(scope: !44, file: !1, line: 10, column: 5)
201 !49 = !DILocation(line: 10, column: 14, scope: !48)
202 !50 = !DILocation(line: 10, column: 10, scope: !48)
203 !51 = !DILocation(line: 10, column: 21, scope: !52)
204 !52 = !DILexicalBlockFile(scope: !53, file: !1, discriminator: 5)
205 !53 = !DILexicalBlockFile(scope: !54, file: !1, discriminator: 1)
206 !54 = distinct !DILexicalBlock(scope: !48, file: !1, line: 10, column: 5)
207 !55 = !DILocation(line: 10, column: 23, scope: !54)
208 !56 = !DILocation(line: 10, column: 5, scope: !48)
209 !57 = !DILocation(line: 10, column: 49, scope: !58)
210 !58 = !DILexicalBlockFile(scope: !54, file: !1, discriminator: 2)
211 !59 = !DILocation(line: 10, column: 45, scope: !54)
212 !60 = !DILocation(line: 10, column: 42, scope: !54)
213 !61 = !DILocation(line: 10, column: 38, scope: !54)
214 !62 = !DILocation(line: 10, column: 34, scope: !63)
215 !63 = !DILexicalBlockFile(scope: !54, file: !1, discriminator: 4)
216 !64 = !DILocation(line: 10, column: 5, scope: !54)
217 !65 = !DILocation(line: 10, column: 50, scope: !66)
218 !66 = !DILexicalBlockFile(scope: !48, file: !1, discriminator: 3)
219 !67 = !DILocation(line: 9, column: 30, scope: !44)
220 !68 = !DILocation(line: 9, column: 3, scope: !44)
221 !69 = !DILocation(line: 11, column: 10, scope: !9)
222 !70 = !DILocation(line: 11, column: 14, scope: !9)
223 !71 = !DILocation(line: 11, column: 3, scope: !9)