1 ; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/branch.prof | opt -analyze -branch-prob | FileCheck %s 2 ; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/branch.prof | opt -analyze -branch-prob | FileCheck %s 3 4 ; Original C++ code for this test case: 5 ; 6 ; #include <stdio.h> 7 ; #include <stdlib.h> 8 9 ; int main(int argc, char *argv[]) { 10 ; if (argc < 2) 11 ; return 1; 12 ; double result; 13 ; int limit = atoi(argv[1]); 14 ; if (limit > 100) { 15 ; double s = 23.041968 * atoi(argv[2]); 16 ; for (int u = 0; u < limit; u++) { 17 ; double x = s; 18 ; s = x + 3.049 + (double)u; 19 ; s -= s + 3.94 / x * 0.32; 20 ; } 21 ; result = s; 22 ; } else { 23 ; result = atoi(argv[2]); 24 ; } 25 ; printf("result is %lf\n", result); 26 ; return 0; 27 ; } 28 29 @.str = private unnamed_addr constant [15 x i8] c"result is %lf\0A\00", align 1 30 31 ; Function Attrs: uwtable 32 define i32 @main(i32 %argc, i8** %argv) #0 !dbg !6 { 33 ; CHECK: Printing analysis 'Branch Probability Analysis' for function 'main': 34 35 entry: 36 %retval = alloca i32, align 4 37 %argc.addr = alloca i32, align 4 38 %argv.addr = alloca i8**, align 8 39 %result = alloca double, align 8 40 %limit = alloca i32, align 4 41 %s = alloca double, align 8 42 %u = alloca i32, align 4 43 %x = alloca double, align 8 44 store i32 0, i32* %retval, align 4 45 store i32 %argc, i32* %argc.addr, align 4 46 call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !16, metadata !17), !dbg !18 47 store i8** %argv, i8*** %argv.addr, align 8 48 call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !19, metadata !17), !dbg !20 49 %0 = load i32, i32* %argc.addr, align 4, !dbg !21 50 %cmp = icmp slt i32 %0, 2, !dbg !23 51 br i1 %cmp, label %if.then, label %if.end, !dbg !24 52 ; CHECK: edge entry -> if.then probability is 0x4ccccccd / 0x80000000 = 60.00% 53 ; CHECK: edge entry -> if.end probability is 0x33333333 / 0x80000000 = 40.00% 54 55 if.then: ; preds = %entry 56 store i32 1, i32* %retval, align 4, !dbg !25 57 br label %return, !dbg !25 58 59 if.end: ; preds = %entry 60 call void @llvm.dbg.declare(metadata double* %result, metadata !26, metadata !17), !dbg !27 61 call void @llvm.dbg.declare(metadata i32* %limit, metadata !28, metadata !17), !dbg !29 62 %1 = load i8**, i8*** %argv.addr, align 8, !dbg !30 63 %arrayidx = getelementptr inbounds i8*, i8** %1, i64 1, !dbg !30 64 %2 = load i8*, i8** %arrayidx, align 8, !dbg !30 65 %call = call i32 @atoi(i8* %2) #4, !dbg !31 66 store i32 %call, i32* %limit, align 4, !dbg !29 67 %3 = load i32, i32* %limit, align 4, !dbg !32 68 %cmp1 = icmp sgt i32 %3, 100, !dbg !34 69 br i1 %cmp1, label %if.then.2, label %if.else, !dbg !35 70 ; CHECK: edge if.end -> if.then.2 probability is 0x66666666 / 0x80000000 = 80.00% 71 ; CHECK: edge if.end -> if.else probability is 0x1999999a / 0x80000000 = 20.00% 72 73 if.then.2: ; preds = %if.end 74 call void @llvm.dbg.declare(metadata double* %s, metadata !36, metadata !17), !dbg !38 75 %4 = load i8**, i8*** %argv.addr, align 8, !dbg !39 76 %arrayidx3 = getelementptr inbounds i8*, i8** %4, i64 2, !dbg !39 77 %5 = load i8*, i8** %arrayidx3, align 8, !dbg !39 78 %call4 = call i32 @atoi(i8* %5) #4, !dbg !40 79 %conv = sitofp i32 %call4 to double, !dbg !40 80 %mul = fmul double 0x40370ABE6A337A81, %conv, !dbg !41 81 store double %mul, double* %s, align 8, !dbg !38 82 call void @llvm.dbg.declare(metadata i32* %u, metadata !42, metadata !17), !dbg !44 83 store i32 0, i32* %u, align 4, !dbg !44 84 br label %for.cond, !dbg !45 85 86 for.cond: ; preds = %for.inc, %if.then.2 87 %6 = load i32, i32* %u, align 4, !dbg !46 88 %7 = load i32, i32* %limit, align 4, !dbg !48 89 %cmp5 = icmp slt i32 %6, %7, !dbg !49 90 br i1 %cmp5, label %for.body, label %for.end, !dbg !50 91 92 for.body: ; preds = %for.cond 93 call void @llvm.dbg.declare(metadata double* %x, metadata !51, metadata !17), !dbg !53 94 %8 = load double, double* %s, align 8, !dbg !54 95 store double %8, double* %x, align 8, !dbg !53 96 %9 = load double, double* %x, align 8, !dbg !55 97 %add = fadd double %9, 3.049000e+00, !dbg !56 98 %10 = load i32, i32* %u, align 4, !dbg !57 99 %conv6 = sitofp i32 %10 to double, !dbg !57 100 %add7 = fadd double %add, %conv6, !dbg !58 101 store double %add7, double* %s, align 8, !dbg !59 102 %11 = load double, double* %s, align 8, !dbg !60 103 %12 = load double, double* %x, align 8, !dbg !61 104 %div = fdiv double 3.940000e+00, %12, !dbg !62 105 %mul8 = fmul double %div, 3.200000e-01, !dbg !63 106 %add9 = fadd double %11, %mul8, !dbg !64 107 %13 = load double, double* %s, align 8, !dbg !65 108 %sub = fsub double %13, %add9, !dbg !65 109 store double %sub, double* %s, align 8, !dbg !65 110 br label %for.inc, !dbg !66 111 112 for.inc: ; preds = %for.body 113 %14 = load i32, i32* %u, align 4, !dbg !67 114 %inc = add nsw i32 %14, 1, !dbg !67 115 store i32 %inc, i32* %u, align 4, !dbg !67 116 br label %for.cond, !dbg !68 117 118 for.end: ; preds = %for.cond 119 %15 = load double, double* %s, align 8, !dbg !69 120 store double %15, double* %result, align 8, !dbg !70 121 br label %if.end.13, !dbg !71 122 123 if.else: ; preds = %if.end 124 %16 = load i8**, i8*** %argv.addr, align 8, !dbg !72 125 %arrayidx10 = getelementptr inbounds i8*, i8** %16, i64 2, !dbg !72 126 %17 = load i8*, i8** %arrayidx10, align 8, !dbg !72 127 %call11 = call i32 @atoi(i8* %17) #4, !dbg !74 128 %conv12 = sitofp i32 %call11 to double, !dbg !74 129 store double %conv12, double* %result, align 8, !dbg !75 130 br label %if.end.13 131 132 if.end.13: ; preds = %if.else, %for.end 133 %18 = load double, double* %result, align 8, !dbg !76 134 %call14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i32 0, i32 0), double %18), !dbg !77 135 store i32 0, i32* %retval, align 4, !dbg !78 136 br label %return, !dbg !78 137 138 return: ; preds = %if.end.13, %if.then 139 %19 = load i32, i32* %retval, align 4, !dbg !79 140 ret i32 %19, !dbg !79 141 } 142 143 ; Function Attrs: nounwind readnone 144 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 145 146 ; Function Attrs: nounwind readonly 147 declare i32 @atoi(i8*) #2 148 149 declare i32 @printf(i8*, ...) #3 150 151 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" } 152 attributes #1 = { nounwind readnone } 153 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" } 154 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" } 155 attributes #4 = { nounwind readonly } 156 157 !llvm.dbg.cu = !{!0} 158 !llvm.module.flags = !{!13, !14} 159 !llvm.ident = !{!15} 160 161 !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: NoDebug, enums: !2, retainedTypes: !3) 162 !1 = !DIFile(filename: "test.cc", directory: "/ssd/llvm_commit") 163 !2 = !{} 164 !3 = !{!4} 165 !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, unit: !0, variables: !2) 167 !7 = !DISubroutineType(types: !8) 168 !8 = !{!9, !9, !10} 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) 240
