240 lines
12 KiB
LLVM
240 lines
12 KiB
LLVM
; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/branch.prof | opt -analyze -branch-prob | FileCheck %s
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; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/branch.prof | opt -analyze -branch-prob | FileCheck %s
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; Original C++ code for this test case:
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;
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; #include <stdio.h>
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; #include <stdlib.h>
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; int main(int argc, char *argv[]) {
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; if (argc < 2)
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; return 1;
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; double result;
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; int limit = atoi(argv[1]);
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; if (limit > 100) {
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; double s = 23.041968 * atoi(argv[2]);
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; for (int u = 0; u < limit; u++) {
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; double x = s;
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; s = x + 3.049 + (double)u;
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; s -= s + 3.94 / x * 0.32;
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; }
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; result = s;
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; } else {
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; result = atoi(argv[2]);
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; }
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; printf("result is %lf\n", result);
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; return 0;
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; }
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@.str = private unnamed_addr constant [15 x i8] c"result is %lf\0A\00", align 1
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; Function Attrs: uwtable
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define i32 @main(i32 %argc, i8** %argv) #0 !dbg !6 {
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; CHECK: Printing analysis 'Branch Probability Analysis' for function 'main':
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entry:
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%retval = alloca i32, align 4
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%argc.addr = alloca i32, align 4
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%argv.addr = alloca i8**, align 8
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%result = alloca double, align 8
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%limit = alloca i32, align 4
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%s = alloca double, align 8
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%u = alloca i32, align 4
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%x = alloca double, align 8
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store i32 0, i32* %retval, align 4
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store i32 %argc, i32* %argc.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !16, metadata !17), !dbg !18
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store i8** %argv, i8*** %argv.addr, align 8
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call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !19, metadata !17), !dbg !20
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%0 = load i32, i32* %argc.addr, align 4, !dbg !21
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%cmp = icmp slt i32 %0, 2, !dbg !23
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br i1 %cmp, label %if.then, label %if.end, !dbg !24
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; CHECK: edge entry -> if.then probability is 0x4ccf6b16 / 0x80000000 = 60.01%
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; CHECK: edge entry -> if.end probability is 0x333094ea / 0x80000000 = 39.99%
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if.then: ; preds = %entry
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store i32 1, i32* %retval, align 4, !dbg !25
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br label %return, !dbg !25
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if.end: ; preds = %entry
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call void @llvm.dbg.declare(metadata double* %result, metadata !26, metadata !17), !dbg !27
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call void @llvm.dbg.declare(metadata i32* %limit, metadata !28, metadata !17), !dbg !29
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%1 = load i8**, i8*** %argv.addr, align 8, !dbg !30
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%arrayidx = getelementptr inbounds i8*, i8** %1, i64 1, !dbg !30
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%2 = load i8*, i8** %arrayidx, align 8, !dbg !30
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%call = call i32 @atoi(i8* %2) #4, !dbg !31
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store i32 %call, i32* %limit, align 4, !dbg !29
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%3 = load i32, i32* %limit, align 4, !dbg !32
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%cmp1 = icmp sgt i32 %3, 100, !dbg !34
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br i1 %cmp1, label %if.then.2, label %if.else, !dbg !35
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; CHECK: edge if.end -> if.then.2 probability is 0x6652c748 / 0x80000000 = 79.94%
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; CHECK: edge if.end -> if.else probability is 0x19ad38b8 / 0x80000000 = 20.06%
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if.then.2: ; preds = %if.end
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call void @llvm.dbg.declare(metadata double* %s, metadata !36, metadata !17), !dbg !38
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%4 = load i8**, i8*** %argv.addr, align 8, !dbg !39
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%arrayidx3 = getelementptr inbounds i8*, i8** %4, i64 2, !dbg !39
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%5 = load i8*, i8** %arrayidx3, align 8, !dbg !39
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%call4 = call i32 @atoi(i8* %5) #4, !dbg !40
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%conv = sitofp i32 %call4 to double, !dbg !40
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%mul = fmul double 0x40370ABE6A337A81, %conv, !dbg !41
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store double %mul, double* %s, align 8, !dbg !38
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call void @llvm.dbg.declare(metadata i32* %u, metadata !42, metadata !17), !dbg !44
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store i32 0, i32* %u, align 4, !dbg !44
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br label %for.cond, !dbg !45
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for.cond: ; preds = %for.inc, %if.then.2
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%6 = load i32, i32* %u, align 4, !dbg !46
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%7 = load i32, i32* %limit, align 4, !dbg !48
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%cmp5 = icmp slt i32 %6, %7, !dbg !49
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br i1 %cmp5, label %for.body, label %for.end, !dbg !50
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for.body: ; preds = %for.cond
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call void @llvm.dbg.declare(metadata double* %x, metadata !51, metadata !17), !dbg !53
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%8 = load double, double* %s, align 8, !dbg !54
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store double %8, double* %x, align 8, !dbg !53
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%9 = load double, double* %x, align 8, !dbg !55
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%add = fadd double %9, 3.049000e+00, !dbg !56
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%10 = load i32, i32* %u, align 4, !dbg !57
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%conv6 = sitofp i32 %10 to double, !dbg !57
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%add7 = fadd double %add, %conv6, !dbg !58
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store double %add7, double* %s, align 8, !dbg !59
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%11 = load double, double* %s, align 8, !dbg !60
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%12 = load double, double* %x, align 8, !dbg !61
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%div = fdiv double 3.940000e+00, %12, !dbg !62
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%mul8 = fmul double %div, 3.200000e-01, !dbg !63
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%add9 = fadd double %11, %mul8, !dbg !64
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%13 = load double, double* %s, align 8, !dbg !65
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%sub = fsub double %13, %add9, !dbg !65
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store double %sub, double* %s, align 8, !dbg !65
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br label %for.inc, !dbg !66
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for.inc: ; preds = %for.body
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%14 = load i32, i32* %u, align 4, !dbg !67
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%inc = add nsw i32 %14, 1, !dbg !67
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store i32 %inc, i32* %u, align 4, !dbg !67
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br label %for.cond, !dbg !68
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for.end: ; preds = %for.cond
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%15 = load double, double* %s, align 8, !dbg !69
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store double %15, double* %result, align 8, !dbg !70
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br label %if.end.13, !dbg !71
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if.else: ; preds = %if.end
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%16 = load i8**, i8*** %argv.addr, align 8, !dbg !72
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%arrayidx10 = getelementptr inbounds i8*, i8** %16, i64 2, !dbg !72
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%17 = load i8*, i8** %arrayidx10, align 8, !dbg !72
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%call11 = call i32 @atoi(i8* %17) #4, !dbg !74
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%conv12 = sitofp i32 %call11 to double, !dbg !74
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store double %conv12, double* %result, align 8, !dbg !75
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br label %if.end.13
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if.end.13: ; preds = %if.else, %for.end
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%18 = load double, double* %result, align 8, !dbg !76
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%call14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i32 0, i32 0), double %18), !dbg !77
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store i32 0, i32* %retval, align 4, !dbg !78
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br label %return, !dbg !78
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return: ; preds = %if.end.13, %if.then
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%19 = load i32, i32* %retval, align 4, !dbg !79
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ret i32 %19, !dbg !79
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: nounwind readonly
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declare i32 @atoi(i8*) #2
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declare i32 @printf(i8*, ...) #3
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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" }
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attributes #1 = { nounwind readnone }
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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" }
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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" }
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attributes #4 = { nounwind readonly }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!13, !14}
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!llvm.ident = !{!15}
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!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)
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!1 = !DIFile(filename: "test.cc", directory: "/ssd/llvm_commit")
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!2 = !{}
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!3 = !{!4}
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!4 = !DIBasicType(name: "double", size: 64, align: 64, encoding: DW_ATE_float)
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!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)
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!7 = !DISubroutineType(types: !8)
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!8 = !{!9, !9, !10}
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!9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64, align: 64)
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64, align: 64)
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!12 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!13 = !{i32 2, !"Dwarf Version", i32 4}
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!14 = !{i32 2, !"Debug Info Version", i32 3}
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!15 = !{!"clang version 3.8.0 (trunk 248211) (llvm/trunk 248217)"}
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!16 = !DILocalVariable(name: "argc", arg: 1, scope: !6, file: !1, line: 4, type: !9)
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!17 = !DIExpression()
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!18 = !DILocation(line: 4, column: 15, scope: !6)
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!19 = !DILocalVariable(name: "argv", arg: 2, scope: !6, file: !1, line: 4, type: !10)
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!20 = !DILocation(line: 4, column: 27, scope: !6)
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!21 = !DILocation(line: 5, column: 8, scope: !22)
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!22 = distinct !DILexicalBlock(scope: !6, file: !1, line: 5, column: 8)
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!23 = !DILocation(line: 5, column: 13, scope: !22)
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!24 = !DILocation(line: 5, column: 8, scope: !6)
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!25 = !DILocation(line: 6, column: 6, scope: !22)
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!26 = !DILocalVariable(name: "result", scope: !6, file: !1, line: 7, type: !4)
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!27 = !DILocation(line: 7, column: 11, scope: !6)
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!28 = !DILocalVariable(name: "limit", scope: !6, file: !1, line: 8, type: !9)
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!29 = !DILocation(line: 8, column: 8, scope: !6)
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!30 = !DILocation(line: 8, column: 21, scope: !6)
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!31 = !DILocation(line: 8, column: 16, scope: !6)
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!32 = !DILocation(line: 9, column: 8, scope: !33)
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!33 = distinct !DILexicalBlock(scope: !6, file: !1, line: 9, column: 8)
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!34 = !DILocation(line: 9, column: 14, scope: !33)
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!35 = !DILocation(line: 9, column: 8, scope: !6)
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!36 = !DILocalVariable(name: "s", scope: !37, file: !1, line: 10, type: !4)
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!37 = distinct !DILexicalBlock(scope: !33, file: !1, line: 9, column: 21)
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!38 = !DILocation(line: 10, column: 13, scope: !37)
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!39 = !DILocation(line: 10, column: 34, scope: !37)
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!40 = !DILocation(line: 10, column: 29, scope: !37)
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!41 = !DILocation(line: 10, column: 27, scope: !37)
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!42 = !DILocalVariable(name: "u", scope: !43, file: !1, line: 11, type: !9)
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!43 = distinct !DILexicalBlock(scope: !37, file: !1, line: 11, column: 6)
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!44 = !DILocation(line: 11, column: 15, scope: !43)
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!45 = !DILocation(line: 11, column: 11, scope: !43)
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!46 = !DILocation(line: 11, column: 22, scope: !47)
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!47 = distinct !DILexicalBlock(scope: !43, file: !1, line: 11, column: 6)
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!48 = !DILocation(line: 11, column: 26, scope: !47)
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!49 = !DILocation(line: 11, column: 24, scope: !47)
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!50 = !DILocation(line: 11, column: 6, scope: !43)
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!51 = !DILocalVariable(name: "x", scope: !52, file: !1, line: 12, type: !4)
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!52 = distinct !DILexicalBlock(scope: !47, file: !1, line: 11, column: 38)
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!53 = !DILocation(line: 12, column: 15, scope: !52)
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!54 = !DILocation(line: 12, column: 19, scope: !52)
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!55 = !DILocation(line: 13, column: 12, scope: !52)
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!56 = !DILocation(line: 13, column: 14, scope: !52)
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!57 = !DILocation(line: 13, column: 32, scope: !52)
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!58 = !DILocation(line: 13, column: 22, scope: !52)
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!59 = !DILocation(line: 13, column: 10, scope: !52)
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!60 = !DILocation(line: 14, column: 13, scope: !52)
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!61 = !DILocation(line: 14, column: 24, scope: !52)
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!62 = !DILocation(line: 14, column: 22, scope: !52)
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!63 = !DILocation(line: 14, column: 26, scope: !52)
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!64 = !DILocation(line: 14, column: 15, scope: !52)
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!65 = !DILocation(line: 14, column: 10, scope: !52)
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!66 = !DILocation(line: 15, column: 6, scope: !52)
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!67 = !DILocation(line: 11, column: 34, scope: !47)
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!68 = !DILocation(line: 11, column: 6, scope: !47)
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!69 = !DILocation(line: 16, column: 15, scope: !37)
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!70 = !DILocation(line: 16, column: 13, scope: !37)
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!71 = !DILocation(line: 17, column: 4, scope: !37)
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!72 = !DILocation(line: 18, column: 20, scope: !73)
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!73 = distinct !DILexicalBlock(scope: !33, file: !1, line: 17, column: 11)
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!74 = !DILocation(line: 18, column: 15, scope: !73)
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!75 = !DILocation(line: 18, column: 13, scope: !73)
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!76 = !DILocation(line: 20, column: 30, scope: !6)
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!77 = !DILocation(line: 20, column: 4, scope: !6)
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!78 = !DILocation(line: 21, column: 4, scope: !6)
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!79 = !DILocation(line: 22, column: 2, scope: !6)
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