; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/branch.prof | opt -analyze -branch-prob | FileCheck %s ; Original C++ code for this test case: ; ; #include ; #include ; int main(int argc, char *argv[]) { ; if (argc < 2) ; return 1; ; double result; ; int limit = atoi(argv[1]); ; if (limit > 100) { ; double s = 23.041968 * atoi(argv[2]); ; for (int u = 0; u < limit; u++) { ; double x = s; ; s = x + 3.049 + (double)u; ; s -= s + 3.94 / x * 0.32; ; } ; result = s; ; } else { ; result = atoi(argv[2]); ; } ; printf("result is %lf\n", result); ; return 0; ; } @.str = private unnamed_addr constant [15 x i8] c"result is %lf\0A\00", align 1 ; Function Attrs: uwtable define i32 @main(i32 %argc, i8** %argv) #0 !dbg !6 { ; CHECK: Printing analysis 'Branch Probability Analysis' for function 'main': entry: %retval = alloca i32, align 4 %argc.addr = alloca i32, align 4 %argv.addr = alloca i8**, align 8 %result = alloca double, align 8 %limit = alloca i32, align 4 %s = alloca double, align 8 %u = alloca i32, align 4 %x = alloca double, align 8 store i32 0, i32* %retval, align 4 store i32 %argc, i32* %argc.addr, align 4 call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !16, metadata !17), !dbg !18 store i8** %argv, i8*** %argv.addr, align 8 call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !19, metadata !17), !dbg !20 %0 = load i32, i32* %argc.addr, align 4, !dbg !21 %cmp = icmp slt i32 %0, 2, !dbg !23 br i1 %cmp, label %if.then, label %if.end, !dbg !24 ; CHECK: edge entry -> if.then probability is 0x4ccccccd / 0x80000000 = 60.00% ; CHECK: edge entry -> if.end probability is 0x33333333 / 0x80000000 = 40.00% if.then: ; preds = %entry store i32 1, i32* %retval, align 4, !dbg !25 br label %return, !dbg !25 if.end: ; preds = %entry call void @llvm.dbg.declare(metadata double* %result, metadata !26, metadata !17), !dbg !27 call void @llvm.dbg.declare(metadata i32* %limit, metadata !28, metadata !17), !dbg !29 %1 = load i8**, i8*** %argv.addr, align 8, !dbg !30 %arrayidx = getelementptr inbounds i8*, i8** %1, i64 1, !dbg !30 %2 = load i8*, i8** %arrayidx, align 8, !dbg !30 %call = call i32 @atoi(i8* %2) #4, !dbg !31 store i32 %call, i32* %limit, align 4, !dbg !29 %3 = load i32, i32* %limit, align 4, !dbg !32 %cmp1 = icmp sgt i32 %3, 100, !dbg !34 br i1 %cmp1, label %if.then.2, label %if.else, !dbg !35 ; CHECK: edge if.end -> if.then.2 probability is 0x66666666 / 0x80000000 = 80.00% ; CHECK: edge if.end -> if.else probability is 0x1999999a / 0x80000000 = 20.00% if.then.2: ; preds = %if.end call void @llvm.dbg.declare(metadata double* %s, metadata !36, metadata !17), !dbg !38 %4 = load i8**, i8*** %argv.addr, align 8, !dbg !39 %arrayidx3 = getelementptr inbounds i8*, i8** %4, i64 2, !dbg !39 %5 = load i8*, i8** %arrayidx3, align 8, !dbg !39 %call4 = call i32 @atoi(i8* %5) #4, !dbg !40 %conv = sitofp i32 %call4 to double, !dbg !40 %mul = fmul double 0x40370ABE6A337A81, %conv, !dbg !41 store double %mul, double* %s, align 8, !dbg !38 call void @llvm.dbg.declare(metadata i32* %u, metadata !42, metadata !17), !dbg !44 store i32 0, i32* %u, align 4, !dbg !44 br label %for.cond, !dbg !45 for.cond: ; preds = %for.inc, %if.then.2 %6 = load i32, i32* %u, align 4, !dbg !46 %7 = load i32, i32* %limit, align 4, !dbg !48 %cmp5 = icmp slt i32 %6, %7, !dbg !49 br i1 %cmp5, label %for.body, label %for.end, !dbg !50 for.body: ; preds = %for.cond call void @llvm.dbg.declare(metadata double* %x, metadata !51, metadata !17), !dbg !53 %8 = load double, double* %s, align 8, !dbg !54 store double %8, double* %x, align 8, !dbg !53 %9 = load double, double* %x, align 8, !dbg !55 %add = fadd double %9, 3.049000e+00, !dbg !56 %10 = load i32, i32* %u, align 4, !dbg !57 %conv6 = sitofp i32 %10 to double, !dbg !57 %add7 = fadd double %add, %conv6, !dbg !58 store double %add7, double* %s, align 8, !dbg !59 %11 = load double, double* %s, align 8, !dbg !60 %12 = load double, double* %x, align 8, !dbg !61 %div = fdiv double 3.940000e+00, %12, !dbg !62 %mul8 = fmul double %div, 3.200000e-01, !dbg !63 %add9 = fadd double %11, %mul8, !dbg !64 %13 = load double, double* %s, align 8, !dbg !65 %sub = fsub double %13, %add9, !dbg !65 store double %sub, double* %s, align 8, !dbg !65 br label %for.inc, !dbg !66 for.inc: ; preds = %for.body %14 = load i32, i32* %u, align 4, !dbg !67 %inc = add nsw i32 %14, 1, !dbg !67 store i32 %inc, i32* %u, align 4, !dbg !67 br label %for.cond, !dbg !68 for.end: ; preds = %for.cond %15 = load double, double* %s, align 8, !dbg !69 store double %15, double* %result, align 8, !dbg !70 br label %if.end.13, !dbg !71 if.else: ; preds = %if.end %16 = load i8**, i8*** %argv.addr, align 8, !dbg !72 %arrayidx10 = getelementptr inbounds i8*, i8** %16, i64 2, !dbg !72 %17 = load i8*, i8** %arrayidx10, align 8, !dbg !72 %call11 = call i32 @atoi(i8* %17) #4, !dbg !74 %conv12 = sitofp i32 %call11 to double, !dbg !74 store double %conv12, double* %result, align 8, !dbg !75 br label %if.end.13 if.end.13: ; preds = %if.else, %for.end %18 = load double, double* %result, align 8, !dbg !76 %call14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i32 0, i32 0), double %18), !dbg !77 store i32 0, i32* %retval, align 4, !dbg !78 br label %return, !dbg !78 return: ; preds = %if.end.13, %if.then %19 = load i32, i32* %retval, align 4, !dbg !79 ret i32 %19, !dbg !79 } ; Function Attrs: nounwind readnone declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 ; Function Attrs: nounwind readonly declare i32 @atoi(i8*) #2 declare i32 @printf(i8*, ...) #3 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" } attributes #1 = { nounwind readnone } 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" } 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" } attributes #4 = { nounwind readonly } !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!13, !14} !llvm.ident = !{!15} !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) !1 = !DIFile(filename: "test.cc", directory: "/ssd/llvm_commit") !2 = !{} !3 = !{!4} !4 = !DIBasicType(name: "double", size: 64, align: 64, encoding: DW_ATE_float) !5 = !{!6} !6 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !7, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, variables: !2) !7 = !DISubroutineType(types: !8) !8 = !{!9, !9, !10} !9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64, align: 64) !11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64, align: 64) !12 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) !13 = !{i32 2, !"Dwarf Version", i32 4} !14 = !{i32 2, !"Debug Info Version", i32 3} !15 = !{!"clang version 3.8.0 (trunk 248211) (llvm/trunk 248217)"} !16 = !DILocalVariable(name: "argc", arg: 1, scope: !6, file: !1, line: 4, type: !9) !17 = !DIExpression() !18 = !DILocation(line: 4, column: 15, scope: !6) !19 = !DILocalVariable(name: "argv", arg: 2, scope: !6, file: !1, line: 4, type: !10) !20 = !DILocation(line: 4, column: 27, scope: !6) !21 = !DILocation(line: 5, column: 8, scope: !22) !22 = distinct !DILexicalBlock(scope: !6, file: !1, line: 5, column: 8) !23 = !DILocation(line: 5, column: 13, scope: !22) !24 = !DILocation(line: 5, column: 8, scope: !6) !25 = !DILocation(line: 6, column: 6, scope: !22) !26 = !DILocalVariable(name: "result", scope: !6, file: !1, line: 7, type: !4) !27 = !DILocation(line: 7, column: 11, scope: !6) !28 = !DILocalVariable(name: "limit", scope: !6, file: !1, line: 8, type: !9) !29 = !DILocation(line: 8, column: 8, scope: !6) !30 = !DILocation(line: 8, column: 21, scope: !6) !31 = !DILocation(line: 8, column: 16, scope: !6) !32 = !DILocation(line: 9, column: 8, scope: !33) !33 = distinct !DILexicalBlock(scope: !6, file: !1, line: 9, column: 8) !34 = !DILocation(line: 9, column: 14, scope: !33) !35 = !DILocation(line: 9, column: 8, scope: !6) !36 = !DILocalVariable(name: "s", scope: !37, file: !1, line: 10, type: !4) !37 = distinct !DILexicalBlock(scope: !33, file: !1, line: 9, column: 21) !38 = !DILocation(line: 10, column: 13, scope: !37) !39 = !DILocation(line: 10, column: 34, scope: !37) !40 = !DILocation(line: 10, column: 29, scope: !37) !41 = !DILocation(line: 10, column: 27, scope: !37) !42 = !DILocalVariable(name: "u", scope: !43, file: !1, line: 11, type: !9) !43 = distinct !DILexicalBlock(scope: !37, file: !1, line: 11, column: 6) !44 = !DILocation(line: 11, column: 15, scope: !43) !45 = !DILocation(line: 11, column: 11, scope: !43) !46 = !DILocation(line: 11, column: 22, scope: !47) !47 = distinct !DILexicalBlock(scope: !43, file: !1, line: 11, column: 6) !48 = !DILocation(line: 11, column: 26, scope: !47) !49 = !DILocation(line: 11, column: 24, scope: !47) !50 = !DILocation(line: 11, column: 6, scope: !43) !51 = !DILocalVariable(name: "x", scope: !52, file: !1, line: 12, type: !4) !52 = distinct !DILexicalBlock(scope: !47, file: !1, line: 11, column: 38) !53 = !DILocation(line: 12, column: 15, scope: !52) !54 = !DILocation(line: 12, column: 19, scope: !52) !55 = !DILocation(line: 13, column: 12, scope: !52) !56 = !DILocation(line: 13, column: 14, scope: !52) !57 = !DILocation(line: 13, column: 32, scope: !52) !58 = !DILocation(line: 13, column: 22, scope: !52) !59 = !DILocation(line: 13, column: 10, scope: !52) !60 = !DILocation(line: 14, column: 13, scope: !52) !61 = !DILocation(line: 14, column: 24, scope: !52) !62 = !DILocation(line: 14, column: 22, scope: !52) !63 = !DILocation(line: 14, column: 26, scope: !52) !64 = !DILocation(line: 14, column: 15, scope: !52) !65 = !DILocation(line: 14, column: 10, scope: !52) !66 = !DILocation(line: 15, column: 6, scope: !52) !67 = !DILocation(line: 11, column: 34, scope: !47) !68 = !DILocation(line: 11, column: 6, scope: !47) !69 = !DILocation(line: 16, column: 15, scope: !37) !70 = !DILocation(line: 16, column: 13, scope: !37) !71 = !DILocation(line: 17, column: 4, scope: !37) !72 = !DILocation(line: 18, column: 20, scope: !73) !73 = distinct !DILexicalBlock(scope: !33, file: !1, line: 17, column: 11) !74 = !DILocation(line: 18, column: 15, scope: !73) !75 = !DILocation(line: 18, column: 13, scope: !73) !76 = !DILocation(line: 20, column: 30, scope: !6) !77 = !DILocation(line: 20, column: 4, scope: !6) !78 = !DILocation(line: 21, column: 4, scope: !6) !79 = !DILocation(line: 22, column: 2, scope: !6)