1 ; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/cfg.prof | opt -analyze -branch-prob | FileCheck %s
3 ; Original C++ code for this test case:
8 ; int main(int argc, char *argv[]) {
12 ; int limit = atoi(argv[1]);
14 ; double s = 23.041968 * atoi(argv[2]);
15 ; for (int u = 0; u < limit; u++) {
17 ; s = x + 3.049 + (double)u;
18 ; s -= s + 3.94 / x * 0.32;
22 ; result = atoi(argv[2]);
24 ; printf("result is %lf\n", result);
28 @.str = private unnamed_addr constant [15 x i8] c"result is %lf\0A\00", align 1
30 ; Function Attrs: uwtable
31 define i32 @main(i32 %argc, i8** %argv) #0 {
32 ; CHECK: Printing analysis 'Branch Probability Analysis' for function 'main':
35 %retval = alloca i32, align 4
36 %argc.addr = alloca i32, align 4
37 %argv.addr = alloca i8**, align 8
38 %result = alloca double, align 8
39 %limit = alloca i32, align 4
40 %s = alloca double, align 8
41 %u = alloca i32, align 4
42 %x = alloca double, align 8
43 store i32 0, i32* %retval, align 4
44 store i32 %argc, i32* %argc.addr, align 4
45 call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !16, metadata !17), !dbg !18
46 store i8** %argv, i8*** %argv.addr, align 8
47 call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !19, metadata !17), !dbg !20
48 %0 = load i32, i32* %argc.addr, align 4, !dbg !21
49 %cmp = icmp slt i32 %0, 2, !dbg !23
50 br i1 %cmp, label %if.then, label %if.end, !dbg !24
51 ; CHECK: edge entry -> if.then probability is 0x4ccccccd / 0x80000000 = 60.00%
52 ; CHECK: edge entry -> if.end probability is 0x33333333 / 0x80000000 = 40.00%
54 if.then: ; preds = %entry
55 store i32 1, i32* %retval, align 4, !dbg !25
56 br label %return, !dbg !25
58 if.end: ; preds = %entry
59 call void @llvm.dbg.declare(metadata double* %result, metadata !26, metadata !17), !dbg !27
60 call void @llvm.dbg.declare(metadata i32* %limit, metadata !28, metadata !17), !dbg !29
61 %1 = load i8**, i8*** %argv.addr, align 8, !dbg !30
62 %arrayidx = getelementptr inbounds i8*, i8** %1, i64 1, !dbg !30
63 %2 = load i8*, i8** %arrayidx, align 8, !dbg !30
64 %call = call i32 @atoi(i8* %2) #4, !dbg !31
65 store i32 %call, i32* %limit, align 4, !dbg !29
66 %3 = load i32, i32* %limit, align 4, !dbg !32
67 %cmp1 = icmp sgt i32 %3, 100, !dbg !34
68 br i1 %cmp1, label %if.then.2, label %if.else, !dbg !35
69 ; CHECK: edge if.end -> if.then.2 probability is 0x66666666 / 0x80000000 = 80.00%
70 ; CHECK: edge if.end -> if.else probability is 0x1999999a / 0x80000000 = 20.00%
72 if.then.2: ; preds = %if.end
73 call void @llvm.dbg.declare(metadata double* %s, metadata !36, metadata !17), !dbg !38
74 %4 = load i8**, i8*** %argv.addr, align 8, !dbg !39
75 %arrayidx3 = getelementptr inbounds i8*, i8** %4, i64 2, !dbg !39
76 %5 = load i8*, i8** %arrayidx3, align 8, !dbg !39
77 %call4 = call i32 @atoi(i8* %5) #4, !dbg !40
78 %conv = sitofp i32 %call4 to double, !dbg !40
79 %mul = fmul double 0x40370ABE6A337A81, %conv, !dbg !41
80 store double %mul, double* %s, align 8, !dbg !38
81 call void @llvm.dbg.declare(metadata i32* %u, metadata !42, metadata !17), !dbg !44
82 store i32 0, i32* %u, align 4, !dbg !44
83 br label %for.cond, !dbg !45
85 for.cond: ; preds = %for.inc, %if.then.2
86 %6 = load i32, i32* %u, align 4, !dbg !46
87 %7 = load i32, i32* %limit, align 4, !dbg !48
88 %cmp5 = icmp slt i32 %6, %7, !dbg !49
89 br i1 %cmp5, label %for.body, label %for.end, !dbg !50
91 for.body: ; preds = %for.cond
92 call void @llvm.dbg.declare(metadata double* %x, metadata !51, metadata !17), !dbg !53
93 %8 = load double, double* %s, align 8, !dbg !54
94 store double %8, double* %x, align 8, !dbg !53
95 %9 = load double, double* %x, align 8, !dbg !55
96 %add = fadd double %9, 3.049000e+00, !dbg !56
97 %10 = load i32, i32* %u, align 4, !dbg !57
98 %conv6 = sitofp i32 %10 to double, !dbg !57
99 %add7 = fadd double %add, %conv6, !dbg !58
100 store double %add7, double* %s, align 8, !dbg !59
101 %11 = load double, double* %s, align 8, !dbg !60
102 %12 = load double, double* %x, align 8, !dbg !61
103 %div = fdiv double 3.940000e+00, %12, !dbg !62
104 %mul8 = fmul double %div, 3.200000e-01, !dbg !63
105 %add9 = fadd double %11, %mul8, !dbg !64
106 %13 = load double, double* %s, align 8, !dbg !65
107 %sub = fsub double %13, %add9, !dbg !65
108 store double %sub, double* %s, align 8, !dbg !65
109 br label %for.inc, !dbg !66
111 for.inc: ; preds = %for.body
112 %14 = load i32, i32* %u, align 4, !dbg !67
113 %inc = add nsw i32 %14, 1, !dbg !67
114 store i32 %inc, i32* %u, align 4, !dbg !67
115 br label %for.cond, !dbg !68
117 for.end: ; preds = %for.cond
118 %15 = load double, double* %s, align 8, !dbg !69
119 store double %15, double* %result, align 8, !dbg !70
120 br label %if.end.13, !dbg !71
122 if.else: ; preds = %if.end
123 %16 = load i8**, i8*** %argv.addr, align 8, !dbg !72
124 %arrayidx10 = getelementptr inbounds i8*, i8** %16, i64 2, !dbg !72
125 %17 = load i8*, i8** %arrayidx10, align 8, !dbg !72
126 %call11 = call i32 @atoi(i8* %17) #4, !dbg !74
127 %conv12 = sitofp i32 %call11 to double, !dbg !74
128 store double %conv12, double* %result, align 8, !dbg !75
131 if.end.13: ; preds = %if.else, %for.end
132 %18 = load double, double* %result, align 8, !dbg !76
133 %call14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i32 0, i32 0), double %18), !dbg !77
134 store i32 0, i32* %retval, align 4, !dbg !78
135 br label %return, !dbg !78
137 return: ; preds = %if.end.13, %if.then
138 %19 = load i32, i32* %retval, align 4, !dbg !79
139 ret i32 %19, !dbg !79
142 ; Function Attrs: nounwind readnone
143 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
145 ; Function Attrs: nounwind readonly
146 declare i32 @atoi(i8*) #2
148 declare i32 @printf(i8*, ...) #3
150 attributes #0 = { uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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" }
151 attributes #1 = { nounwind readnone }
152 attributes #2 = { nounwind readonly "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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" }
153 attributes #3 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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" }
154 attributes #4 = { nounwind readonly }
157 !llvm.module.flags = !{!13, !14}
160 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 248211) (llvm/trunk 248217)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, retainedTypes: !3, subprograms: !5)
161 !1 = !DIFile(filename: "test.cc", directory: "/ssd/llvm_commit")
164 !4 = !DIBasicType(name: "double", size: 64, align: 64, encoding: DW_ATE_float)
166 !6 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !7, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, function: i32 (i32, i8**)* @main, variables: !2)
167 !7 = !DISubroutineType(types: !8)
169 !9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
170 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64, align: 64)
171 !11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64, align: 64)
172 !12 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
173 !13 = !{i32 2, !"Dwarf Version", i32 4}
174 !14 = !{i32 2, !"Debug Info Version", i32 3}
175 !15 = !{!"clang version 3.8.0 (trunk 248211) (llvm/trunk 248217)"}
176 !16 = !DILocalVariable(name: "argc", arg: 1, scope: !6, file: !1, line: 4, type: !9)
177 !17 = !DIExpression()
178 !18 = !DILocation(line: 4, column: 15, scope: !6)
179 !19 = !DILocalVariable(name: "argv", arg: 2, scope: !6, file: !1, line: 4, type: !10)
180 !20 = !DILocation(line: 4, column: 27, scope: !6)
181 !21 = !DILocation(line: 5, column: 8, scope: !22)
182 !22 = distinct !DILexicalBlock(scope: !6, file: !1, line: 5, column: 8)
183 !23 = !DILocation(line: 5, column: 13, scope: !22)
184 !24 = !DILocation(line: 5, column: 8, scope: !6)
185 !25 = !DILocation(line: 6, column: 6, scope: !22)
186 !26 = !DILocalVariable(name: "result", scope: !6, file: !1, line: 7, type: !4)
187 !27 = !DILocation(line: 7, column: 11, scope: !6)
188 !28 = !DILocalVariable(name: "limit", scope: !6, file: !1, line: 8, type: !9)
189 !29 = !DILocation(line: 8, column: 8, scope: !6)
190 !30 = !DILocation(line: 8, column: 21, scope: !6)
191 !31 = !DILocation(line: 8, column: 16, scope: !6)
192 !32 = !DILocation(line: 9, column: 8, scope: !33)
193 !33 = distinct !DILexicalBlock(scope: !6, file: !1, line: 9, column: 8)
194 !34 = !DILocation(line: 9, column: 14, scope: !33)
195 !35 = !DILocation(line: 9, column: 8, scope: !6)
196 !36 = !DILocalVariable(name: "s", scope: !37, file: !1, line: 10, type: !4)
197 !37 = distinct !DILexicalBlock(scope: !33, file: !1, line: 9, column: 21)
198 !38 = !DILocation(line: 10, column: 13, scope: !37)
199 !39 = !DILocation(line: 10, column: 34, scope: !37)
200 !40 = !DILocation(line: 10, column: 29, scope: !37)
201 !41 = !DILocation(line: 10, column: 27, scope: !37)
202 !42 = !DILocalVariable(name: "u", scope: !43, file: !1, line: 11, type: !9)
203 !43 = distinct !DILexicalBlock(scope: !37, file: !1, line: 11, column: 6)
204 !44 = !DILocation(line: 11, column: 15, scope: !43)
205 !45 = !DILocation(line: 11, column: 11, scope: !43)
206 !46 = !DILocation(line: 11, column: 22, scope: !47)
207 !47 = distinct !DILexicalBlock(scope: !43, file: !1, line: 11, column: 6)
208 !48 = !DILocation(line: 11, column: 26, scope: !47)
209 !49 = !DILocation(line: 11, column: 24, scope: !47)
210 !50 = !DILocation(line: 11, column: 6, scope: !43)
211 !51 = !DILocalVariable(name: "x", scope: !52, file: !1, line: 12, type: !4)
212 !52 = distinct !DILexicalBlock(scope: !47, file: !1, line: 11, column: 38)
213 !53 = !DILocation(line: 12, column: 15, scope: !52)
214 !54 = !DILocation(line: 12, column: 19, scope: !52)
215 !55 = !DILocation(line: 13, column: 12, scope: !52)
216 !56 = !DILocation(line: 13, column: 14, scope: !52)
217 !57 = !DILocation(line: 13, column: 32, scope: !52)
218 !58 = !DILocation(line: 13, column: 22, scope: !52)
219 !59 = !DILocation(line: 13, column: 10, scope: !52)
220 !60 = !DILocation(line: 14, column: 13, scope: !52)
221 !61 = !DILocation(line: 14, column: 24, scope: !52)
222 !62 = !DILocation(line: 14, column: 22, scope: !52)
223 !63 = !DILocation(line: 14, column: 26, scope: !52)
224 !64 = !DILocation(line: 14, column: 15, scope: !52)
225 !65 = !DILocation(line: 14, column: 10, scope: !52)
226 !66 = !DILocation(line: 15, column: 6, scope: !52)
227 !67 = !DILocation(line: 11, column: 34, scope: !47)
228 !68 = !DILocation(line: 11, column: 6, scope: !47)
229 !69 = !DILocation(line: 16, column: 15, scope: !37)
230 !70 = !DILocation(line: 16, column: 13, scope: !37)
231 !71 = !DILocation(line: 17, column: 4, scope: !37)
232 !72 = !DILocation(line: 18, column: 20, scope: !73)
233 !73 = distinct !DILexicalBlock(scope: !33, file: !1, line: 17, column: 11)
234 !74 = !DILocation(line: 18, column: 15, scope: !73)
235 !75 = !DILocation(line: 18, column: 13, scope: !73)
236 !76 = !DILocation(line: 20, column: 30, scope: !6)
237 !77 = !DILocation(line: 20, column: 4, scope: !6)
238 !78 = !DILocation(line: 21, column: 4, scope: !6)
239 !79 = !DILocation(line: 22, column: 2, scope: !6)