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 0x4ccf6b16 / 0x80000000 = 60.01% 53 ; CHECK: edge entry -> if.end probability is 0x333094ea / 0x80000000 = 39.99% 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 0x6652c748 / 0x80000000 = 79.94% 71 ; CHECK: edge if.end -> if.else probability is 0x19ad38b8 / 0x80000000 = 20.06% 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, !prof !80 91 ; CHECK: edge for.cond -> for.body probability is 0x73333333 / 0x80000000 = 90.00% 92 ; CHECK: edge for.cond -> for.end probability is 0x0ccccccd / 0x80000000 = 10.00% 93 94 for.body: ; preds = %for.cond 95 call void @llvm.dbg.declare(metadata double* %x, metadata !51, metadata !17), !dbg !53 96 %8 = load double, double* %s, align 8, !dbg !54 97 store double %8, double* %x, align 8, !dbg !53 98 %9 = load double, double* %x, align 8, !dbg !55 99 %add = fadd double %9, 3.049000e+00, !dbg !56 100 %10 = load i32, i32* %u, align 4, !dbg !57 101 %conv6 = sitofp i32 %10 to double, !dbg !57 102 %add7 = fadd double %add, %conv6, !dbg !58 103 store double %add7, double* %s, align 8, !dbg !59 104 %11 = load double, double* %s, align 8, !dbg !60 105 %12 = load double, double* %x, align 8, !dbg !61 106 %div = fdiv double 3.940000e+00, %12, !dbg !62 107 %mul8 = fmul double %div, 3.200000e-01, !dbg !63 108 %add9 = fadd double %11, %mul8, !dbg !64 109 %13 = load double, double* %s, align 8, !dbg !65 110 %sub = fsub double %13, %add9, !dbg !65 111 store double %sub, double* %s, align 8, !dbg !65 112 br label %for.inc, !dbg !66 113 114 for.inc: ; preds = %for.body 115 %14 = load i32, i32* %u, align 4, !dbg !67 116 %inc = add nsw i32 %14, 1, !dbg !67 117 store i32 %inc, i32* %u, align 4, !dbg !67 118 br label %for.cond, !dbg !68 119 120 for.end: ; preds = %for.cond 121 %15 = load double, double* %s, align 8, !dbg !69 122 store double %15, double* %result, align 8, !dbg !70 123 br label %if.end.13, !dbg !71 124 125 if.else: ; preds = %if.end 126 %16 = load i8**, i8*** %argv.addr, align 8, !dbg !72 127 %arrayidx10 = getelementptr inbounds i8*, i8** %16, i64 2, !dbg !72 128 %17 = load i8*, i8** %arrayidx10, align 8, !dbg !72 129 %call11 = call i32 @atoi(i8* %17) #4, !dbg !74 130 %conv12 = sitofp i32 %call11 to double, !dbg !74 131 store double %conv12, double* %result, align 8, !dbg !75 132 br label %if.end.13 133 134 if.end.13: ; preds = %if.else, %for.end 135 %18 = load double, double* %result, align 8, !dbg !76 136 %call14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i32 0, i32 0), double %18), !dbg !77 137 store i32 0, i32* %retval, align 4, !dbg !78 138 br label %return, !dbg !78 139 140 return: ; preds = %if.end.13, %if.then 141 %19 = load i32, i32* %retval, align 4, !dbg !79 142 ret i32 %19, !dbg !79 143 } 144 145 ; Function Attrs: nounwind readnone 146 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 147 148 ; Function Attrs: nounwind readonly 149 declare i32 @atoi(i8*) #2 150 151 declare i32 @printf(i8*, ...) #3 152 153 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" } 154 attributes #1 = { nounwind readnone } 155 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" } 156 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" } 157 attributes #4 = { nounwind readonly } 158 159 !llvm.dbg.cu = !{!0} 160 !llvm.module.flags = !{!13, !14} 161 !llvm.ident = !{!15} 162 163 !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) 164 !1 = !DIFile(filename: "test.cc", directory: "/ssd/llvm_commit") 165 !2 = !{} 166 !3 = !{!4} 167 !4 = !DIBasicType(name: "double", size: 64, align: 64, encoding: DW_ATE_float) 168 !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, retainedNodes: !2) 169 !7 = !DISubroutineType(types: !8) 170 !8 = !{!9, !9, !10} 171 !9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 172 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64, align: 64) 173 !11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64, align: 64) 174 !12 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 175 !13 = !{i32 2, !"Dwarf Version", i32 4} 176 !14 = !{i32 2, !"Debug Info Version", i32 3} 177 !15 = !{!"clang version 3.8.0 (trunk 248211) (llvm/trunk 248217)"} 178 !16 = !DILocalVariable(name: "argc", arg: 1, scope: !6, file: !1, line: 4, type: !9) 179 !17 = !DIExpression() 180 !18 = !DILocation(line: 4, column: 15, scope: !6) 181 !19 = !DILocalVariable(name: "argv", arg: 2, scope: !6, file: !1, line: 4, type: !10) 182 !20 = !DILocation(line: 4, column: 27, scope: !6) 183 !21 = !DILocation(line: 5, column: 8, scope: !22) 184 !22 = distinct !DILexicalBlock(scope: !6, file: !1, line: 5, column: 8) 185 !23 = !DILocation(line: 5, column: 13, scope: !22) 186 !24 = !DILocation(line: 5, column: 8, scope: !6) 187 !25 = !DILocation(line: 6, column: 6, scope: !22) 188 !26 = !DILocalVariable(name: "result", scope: !6, file: !1, line: 7, type: !4) 189 !27 = !DILocation(line: 7, column: 11, scope: !6) 190 !28 = !DILocalVariable(name: "limit", scope: !6, file: !1, line: 8, type: !9) 191 !29 = !DILocation(line: 8, column: 8, scope: !6) 192 !30 = !DILocation(line: 8, column: 21, scope: !6) 193 !31 = !DILocation(line: 8, column: 16, scope: !6) 194 !32 = !DILocation(line: 9, column: 8, scope: !33) 195 !33 = distinct !DILexicalBlock(scope: !6, file: !1, line: 9, column: 8) 196 !34 = !DILocation(line: 9, column: 14, scope: !33) 197 !35 = !DILocation(line: 9, column: 8, scope: !6) 198 !36 = !DILocalVariable(name: "s", scope: !37, file: !1, line: 10, type: !4) 199 !37 = distinct !DILexicalBlock(scope: !33, file: !1, line: 9, column: 21) 200 !38 = !DILocation(line: 10, column: 13, scope: !37) 201 !39 = !DILocation(line: 10, column: 34, scope: !37) 202 !40 = !DILocation(line: 10, column: 29, scope: !37) 203 !41 = !DILocation(line: 10, column: 27, scope: !37) 204 !42 = !DILocalVariable(name: "u", scope: !43, file: !1, line: 11, type: !9) 205 !43 = distinct !DILexicalBlock(scope: !37, file: !1, line: 11, column: 6) 206 !44 = !DILocation(line: 11, column: 15, scope: !43) 207 !45 = !DILocation(line: 11, column: 11, scope: !43) 208 !46 = !DILocation(line: 11, column: 22, scope: !47) 209 !47 = distinct !DILexicalBlock(scope: !43, file: !1, line: 11, column: 6) 210 !48 = !DILocation(line: 11, column: 26, scope: !47) 211 !49 = !DILocation(line: 11, column: 24, scope: !47) 212 !50 = !DILocation(line: 11, column: 6, scope: !43) 213 !51 = !DILocalVariable(name: "x", scope: !52, file: !1, line: 12, type: !4) 214 !52 = distinct !DILexicalBlock(scope: !47, file: !1, line: 11, column: 38) 215 !53 = !DILocation(line: 12, column: 15, scope: !52) 216 !54 = !DILocation(line: 12, column: 19, scope: !52) 217 !55 = !DILocation(line: 13, column: 12, scope: !52) 218 !56 = !DILocation(line: 13, column: 14, scope: !52) 219 !57 = !DILocation(line: 13, column: 32, scope: !52) 220 !58 = !DILocation(line: 13, column: 22, scope: !52) 221 !59 = !DILocation(line: 13, column: 10, scope: !52) 222 !60 = !DILocation(line: 14, column: 13, scope: !52) 223 !61 = !DILocation(line: 14, column: 24, scope: !52) 224 !62 = !DILocation(line: 14, column: 22, scope: !52) 225 !63 = !DILocation(line: 14, column: 26, scope: !52) 226 !64 = !DILocation(line: 14, column: 15, scope: !52) 227 !65 = !DILocation(line: 14, column: 10, scope: !52) 228 !66 = !DILocation(line: 15, column: 6, scope: !52) 229 !67 = !DILocation(line: 11, column: 34, scope: !47) 230 !68 = !DILocation(line: 11, column: 6, scope: !47) 231 !69 = !DILocation(line: 16, column: 15, scope: !37) 232 !70 = !DILocation(line: 16, column: 13, scope: !37) 233 !71 = !DILocation(line: 17, column: 4, scope: !37) 234 !72 = !DILocation(line: 18, column: 20, scope: !73) 235 !73 = distinct !DILexicalBlock(scope: !33, file: !1, line: 17, column: 11) 236 !74 = !DILocation(line: 18, column: 15, scope: !73) 237 !75 = !DILocation(line: 18, column: 13, scope: !73) 238 !76 = !DILocation(line: 20, column: 30, scope: !6) 239 !77 = !DILocation(line: 20, column: 4, scope: !6) 240 !78 = !DILocation(line: 21, column: 4, scope: !6) 241 !79 = !DILocation(line: 22, column: 2, scope: !6) 242 !80 = !{!"branch_weights", i32 90, i32 10} 243
