1; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/gcc-simple.afdo -S | FileCheck %s 2; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/gcc-simple.afdo -S | FileCheck %s 3; XFAIL: powerpc64-, s390x, mips-, mips64-, sparc 4; Original code: 5; 6; #include <stdlib.h> 7; 8; long long int foo(long i) { 9; if (rand() < 500) return 2; else if (rand() > 5000) return 10; else return 90; 10; } 11; 12; int main() { 13; long long int sum = 0; 14; for (int k = 0; k < 3000; k++) 15; for (int i = 0; i < 200000; i++) sum += foo(i); 16; return sum > 0 ? 0 : 1; 17; } 18; 19; This test was compiled down to bytecode at -O0 to avoid inlining foo() into 20; main(). The profile was generated using a GCC-generated binary (also compiled 21; at -O0). The conversion from the Linux Perf profile to the GCC autofdo 22; profile used the converter at https://github.com/google/autofdo 23; 24; $ gcc -g -O0 gcc-simple.cc -o gcc-simple 25; $ perf record -b ./gcc-simple 26; $ create_gcov --binary=gcc-simple --gcov=gcc-simple.afdo 27 28define i64 @_Z3fool(i64 %i) #0 !dbg !4 { 29; CHECK: !prof ![[EC1:[0-9]+]] 30entry: 31 %retval = alloca i64, align 8 32 %i.addr = alloca i64, align 8 33 store i64 %i, i64* %i.addr, align 8 34 call void @llvm.dbg.declare(metadata i64* %i.addr, metadata !16, metadata !17), !dbg !18 35 %call = call i32 @rand() #3, !dbg !19 36 %cmp = icmp slt i32 %call, 500, !dbg !21 37 br i1 %cmp, label %if.then, label %if.else, !dbg !22 38; CHECK: !prof ![[PROF1:[0-9]+]] 39 40if.then: ; preds = %entry 41 store i64 2, i64* %retval, align 8, !dbg !23 42 br label %return, !dbg !23 43 44if.else: ; preds = %entry 45 %call1 = call i32 @rand() #3, !dbg !25 46 %cmp2 = icmp sgt i32 %call1, 5000, !dbg !28 47 br i1 %cmp2, label %if.then.3, label %if.else.4, !dbg !29 48; CHECK: !prof ![[PROF2:[0-9]+]] 49 50if.then.3: ; preds = %if.else 51 store i64 10, i64* %retval, align 8, !dbg !30 52 br label %return, !dbg !30 53 54if.else.4: ; preds = %if.else 55 store i64 90, i64* %retval, align 8, !dbg !32 56 br label %return, !dbg !32 57 58return: ; preds = %if.else.4, %if.then.3, %if.then 59 %0 = load i64, i64* %retval, align 8, !dbg !34 60 ret i64 %0, !dbg !34 61} 62 63; Function Attrs: nounwind readnone 64declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 65 66; Function Attrs: nounwind 67declare i32 @rand() #2 68 69; Function Attrs: nounwind uwtable 70define i32 @main() #0 !dbg !9 { 71; CHECK: !prof ![[EC2:[0-9]+]] 72entry: 73 %retval = alloca i32, align 4 74 %sum = alloca i64, align 8 75 %k = alloca i32, align 4 76 %i = alloca i32, align 4 77 store i32 0, i32* %retval, align 4 78 call void @llvm.dbg.declare(metadata i64* %sum, metadata !35, metadata !17), !dbg !36 79 store i64 0, i64* %sum, align 8, !dbg !36 80 call void @llvm.dbg.declare(metadata i32* %k, metadata !37, metadata !17), !dbg !39 81 store i32 0, i32* %k, align 4, !dbg !39 82 br label %for.cond, !dbg !40 83 84for.cond: ; preds = %for.inc.4, %entry 85 %0 = load i32, i32* %k, align 4, !dbg !41 86 %cmp = icmp slt i32 %0, 3000, !dbg !45 87 br i1 %cmp, label %for.body, label %for.end.6, !dbg !46 88; CHECK: !prof ![[PROF3:[0-9]+]] 89 90for.body: ; preds = %for.cond 91 call void @llvm.dbg.declare(metadata i32* %i, metadata !47, metadata !17), !dbg !49 92 store i32 0, i32* %i, align 4, !dbg !49 93 br label %for.cond.1, !dbg !50 94 95for.cond.1: ; preds = %for.inc, %for.body 96 %1 = load i32, i32* %i, align 4, !dbg !51 97 %cmp2 = icmp slt i32 %1, 200000, !dbg !55 98 br i1 %cmp2, label %for.body.3, label %for.end, !dbg !56 99; CHECK: !prof ![[PROF4:[0-9]+]] 100 101for.body.3: ; preds = %for.cond.1 102 %2 = load i32, i32* %i, align 4, !dbg !57 103 %conv = sext i32 %2 to i64, !dbg !57 104 %call = call i64 @_Z3fool(i64 %conv), !dbg !59 105 %3 = load i64, i64* %sum, align 8, !dbg !60 106 %add = add nsw i64 %3, %call, !dbg !60 107 store i64 %add, i64* %sum, align 8, !dbg !60 108 br label %for.inc, !dbg !61 109 110for.inc: ; preds = %for.body.3 111 %4 = load i32, i32* %i, align 4, !dbg !62 112 %inc = add nsw i32 %4, 1, !dbg !62 113 store i32 %inc, i32* %i, align 4, !dbg !62 114 br label %for.cond.1, !dbg !64 115 116for.end: ; preds = %for.cond.1 117 br label %for.inc.4, !dbg !65 118 119for.inc.4: ; preds = %for.end 120 %5 = load i32, i32* %k, align 4, !dbg !67 121 %inc5 = add nsw i32 %5, 1, !dbg !67 122 store i32 %inc5, i32* %k, align 4, !dbg !67 123 br label %for.cond, !dbg !68 124 125for.end.6: ; preds = %for.cond 126 %6 = load i64, i64* %sum, align 8, !dbg !69 127 %cmp7 = icmp sgt i64 %6, 0, !dbg !70 128 %cond = select i1 %cmp7, i32 0, i32 1, !dbg !69 129 ret i32 %cond, !dbg !71 130} 131 132; CHECK ![[EC1]] = !{!"function_entry_count", i64 24108} 133; CHECK ![[PROF1]] = !{!"branch_weights", i32 1, i32 30124} 134; CHECK ![[PROF2]] = !{!"branch_weights", i32 30177, i32 29579} 135; CHECK ![[EC2]] = !{!"function_entry_count", i64 0} 136; CHECK ![[PROF3]] = !{!"branch_weights", i32 1, i32 1} 137; CHECK ![[PROF4]] = !{!"branch_weights", i32 1, i32 20238} 138 139attributes #0 = { nounwind 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" } 140attributes #1 = { nounwind readnone } 141attributes #2 = { nounwind "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" } 142attributes #3 = { nounwind } 143 144!llvm.dbg.cu = !{!0} 145!llvm.module.flags = !{!13, !14} 146!llvm.ident = !{!15} 147 148!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 247554) (llvm/trunk 247557)", isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug, enums: !2) 149!1 = !DIFile(filename: "discriminator.cc", directory: "/usr/local/google/home/dnovillo/llvm/test/autofdo") 150!2 = !{} 151!4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fool", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2) 152!5 = !DISubroutineType(types: !6) 153!6 = !{!7, !8} 154!7 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed) 155!8 = !DIBasicType(name: "long int", size: 64, align: 64, encoding: DW_ATE_signed) 156!9 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 7, type: !10, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2) 157!10 = !DISubroutineType(types: !11) 158!11 = !{!12} 159!12 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 160!13 = !{i32 2, !"Dwarf Version", i32 4} 161!14 = !{i32 2, !"Debug Info Version", i32 3} 162!15 = !{!"clang version 3.8.0 (trunk 247554) (llvm/trunk 247557)"} 163!16 = !DILocalVariable(name: "i", arg: 1, scope: !4, file: !1, line: 3, type: !8) 164!17 = !DIExpression() 165!18 = !DILocation(line: 3, column: 24, scope: !4) 166!19 = !DILocation(line: 4, column: 7, scope: !20) 167!20 = distinct !DILexicalBlock(scope: !4, file: !1, line: 4, column: 7) 168!21 = !DILocation(line: 4, column: 14, scope: !20) 169!22 = !DILocation(line: 4, column: 7, scope: !4) 170!23 = !DILocation(line: 4, column: 21, scope: !24) 171!24 = !DILexicalBlockFile(scope: !20, file: !1, discriminator: 1) 172!25 = !DILocation(line: 4, column: 40, scope: !26) 173!26 = !DILexicalBlockFile(scope: !27, file: !1, discriminator: 2) 174!27 = distinct !DILexicalBlock(scope: !20, file: !1, line: 4, column: 40) 175!28 = !DILocation(line: 4, column: 47, scope: !27) 176!29 = !DILocation(line: 4, column: 40, scope: !20) 177!30 = !DILocation(line: 4, column: 55, scope: !31) 178!31 = !DILexicalBlockFile(scope: !27, file: !1, discriminator: 3) 179!32 = !DILocation(line: 4, column: 71, scope: !33) 180!33 = !DILexicalBlockFile(scope: !27, file: !1, discriminator: 4) 181!34 = !DILocation(line: 5, column: 1, scope: !4) 182!35 = !DILocalVariable(name: "sum", scope: !9, file: !1, line: 8, type: !7) 183!36 = !DILocation(line: 8, column: 17, scope: !9) 184!37 = !DILocalVariable(name: "k", scope: !38, file: !1, line: 9, type: !12) 185!38 = distinct !DILexicalBlock(scope: !9, file: !1, line: 9, column: 3) 186!39 = !DILocation(line: 9, column: 12, scope: !38) 187!40 = !DILocation(line: 9, column: 8, scope: !38) 188!41 = !DILocation(line: 9, column: 19, scope: !42) 189!42 = !DILexicalBlockFile(scope: !43, file: !1, discriminator: 2) 190!43 = !DILexicalBlockFile(scope: !44, file: !1, discriminator: 1) 191!44 = distinct !DILexicalBlock(scope: !38, file: !1, line: 9, column: 3) 192!45 = !DILocation(line: 9, column: 21, scope: !44) 193!46 = !DILocation(line: 9, column: 3, scope: !38) 194!47 = !DILocalVariable(name: "i", scope: !48, file: !1, line: 10, type: !12) 195!48 = distinct !DILexicalBlock(scope: !44, file: !1, line: 10, column: 5) 196!49 = !DILocation(line: 10, column: 14, scope: !48) 197!50 = !DILocation(line: 10, column: 10, scope: !48) 198!51 = !DILocation(line: 10, column: 21, scope: !52) 199!52 = !DILexicalBlockFile(scope: !53, file: !1, discriminator: 5) 200!53 = !DILexicalBlockFile(scope: !54, file: !1, discriminator: 1) 201!54 = distinct !DILexicalBlock(scope: !48, file: !1, line: 10, column: 5) 202!55 = !DILocation(line: 10, column: 23, scope: !54) 203!56 = !DILocation(line: 10, column: 5, scope: !48) 204!57 = !DILocation(line: 10, column: 49, scope: !58) 205!58 = !DILexicalBlockFile(scope: !54, file: !1, discriminator: 2) 206!59 = !DILocation(line: 10, column: 45, scope: !54) 207!60 = !DILocation(line: 10, column: 42, scope: !54) 208!61 = !DILocation(line: 10, column: 38, scope: !54) 209!62 = !DILocation(line: 10, column: 34, scope: !63) 210!63 = !DILexicalBlockFile(scope: !54, file: !1, discriminator: 4) 211!64 = !DILocation(line: 10, column: 5, scope: !54) 212!65 = !DILocation(line: 10, column: 50, scope: !66) 213!66 = !DILexicalBlockFile(scope: !48, file: !1, discriminator: 3) 214!67 = !DILocation(line: 9, column: 30, scope: !44) 215!68 = !DILocation(line: 9, column: 3, scope: !44) 216!69 = !DILocation(line: 11, column: 10, scope: !9) 217!70 = !DILocation(line: 11, column: 14, scope: !9) 218!71 = !DILocation(line: 11, column: 3, scope: !9) 219