| ; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/gcc-simple.afdo -S | FileCheck %s |
| ; |
| ; Original code: |
| ; |
| ; #include <stdlib.h> |
| ; |
| ; long long int foo(long i) { |
| ; if (rand() < 500) return 2; else if (rand() > 5000) return 10; else return 90; |
| ; } |
| ; |
| ; int main() { |
| ; long long int sum = 0; |
| ; for (int k = 0; k < 3000; k++) |
| ; for (int i = 0; i < 200000; i++) sum += foo(i); |
| ; return sum > 0 ? 0 : 1; |
| ; } |
| ; |
| ; This test was compiled down to bytecode at -O0 to avoid inlining foo() into |
| ; main(). The profile was generated using a GCC-generated binary (also compiled |
| ; at -O0). The conversion from the Linux Perf profile to the GCC autofdo |
| ; profile used the converter at https://github.com/google/autofdo |
| ; |
| ; $ gcc -g -O0 gcc-simple.cc -o gcc-simple |
| ; $ perf record -b ./gcc-simple |
| ; $ create_gcov --binary=gcc-simple --gcov=gcc-simple.afdo |
| |
| define i64 @_Z3fool(i64 %i) #0 !dbg !4 { |
| ; CHECK: !prof ![[EC1:[0-9]+]] |
| entry: |
| %retval = alloca i64, align 8 |
| %i.addr = alloca i64, align 8 |
| store i64 %i, ptr %i.addr, align 8 |
| call void @llvm.dbg.declare(metadata ptr %i.addr, metadata !16, metadata !17), !dbg !18 |
| %call = call i32 @rand() #3, !dbg !19 |
| ; CHECK: !prof ![[PROF1:[0-9]+]] |
| %cmp = icmp slt i32 %call, 500, !dbg !21 |
| br i1 %cmp, label %if.then, label %if.else, !dbg !22 |
| ; CHECK: !prof ![[PROF2:[0-9]+]] |
| |
| if.then: ; preds = %entry |
| store i64 2, ptr %retval, align 8, !dbg !23 |
| br label %return, !dbg !23 |
| |
| if.else: ; preds = %entry |
| %call1 = call i32 @rand() #3, !dbg !25 |
| ; CHECK: !prof ![[PROF3:[0-9]+]] |
| %cmp2 = icmp sgt i32 %call1, 5000, !dbg !28 |
| br i1 %cmp2, label %if.then.3, label %if.else.4, !dbg !29 |
| ; CHECK: !prof ![[PROF4:[0-9]+]] |
| |
| if.then.3: ; preds = %if.else |
| store i64 10, ptr %retval, align 8, !dbg !30 |
| br label %return, !dbg !30 |
| |
| if.else.4: ; preds = %if.else |
| store i64 90, ptr %retval, align 8, !dbg !32 |
| br label %return, !dbg !32 |
| |
| return: ; preds = %if.else.4, %if.then.3, %if.then |
| %0 = load i64, ptr %retval, align 8, !dbg !34 |
| ret i64 %0, !dbg !34 |
| } |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 |
| |
| ; Function Attrs: nounwind |
| declare i32 @rand() #2 |
| |
| ; Function Attrs: nounwind uwtable |
| define i32 @main() #0 !dbg !9 { |
| ; CHECK: !prof ![[EC2:[0-9]+]] |
| entry: |
| %retval = alloca i32, align 4 |
| %sum = alloca i64, align 8 |
| %k = alloca i32, align 4 |
| %i = alloca i32, align 4 |
| store i32 0, ptr %retval, align 4 |
| call void @llvm.dbg.declare(metadata ptr %sum, metadata !35, metadata !17), !dbg !36 |
| store i64 0, ptr %sum, align 8, !dbg !36 |
| call void @llvm.dbg.declare(metadata ptr %k, metadata !37, metadata !17), !dbg !39 |
| store i32 0, ptr %k, align 4, !dbg !39 |
| br label %for.cond, !dbg !40 |
| |
| for.cond: ; preds = %for.inc.4, %entry |
| %0 = load i32, ptr %k, align 4, !dbg !41 |
| %cmp = icmp slt i32 %0, 3000, !dbg !45 |
| br i1 %cmp, label %for.body, label %for.end.6, !dbg !46 |
| ; CHECK: !prof ![[PROF6:[0-9]+]] |
| |
| for.body: ; preds = %for.cond |
| call void @llvm.dbg.declare(metadata ptr %i, metadata !47, metadata !17), !dbg !49 |
| store i32 0, ptr %i, align 4, !dbg !49 |
| br label %for.cond.1, !dbg !50 |
| |
| for.cond.1: ; preds = %for.inc, %for.body |
| %1 = load i32, ptr %i, align 4, !dbg !51 |
| %cmp2 = icmp slt i32 %1, 200000, !dbg !55 |
| br i1 %cmp2, label %for.body.3, label %for.end, !dbg !56 |
| ; CHECK: !prof ![[PROF7:[0-9]+]] |
| |
| for.body.3: ; preds = %for.cond.1 |
| %2 = load i32, ptr %i, align 4, !dbg !57 |
| %conv = sext i32 %2 to i64, !dbg !57 |
| %call = call i64 @_Z3fool(i64 %conv), !dbg !59 |
| ; CHECK: !prof ![[PROF8:[0-9]+]] |
| %3 = load i64, ptr %sum, align 8, !dbg !60 |
| %add = add nsw i64 %3, %call, !dbg !60 |
| store i64 %add, ptr %sum, align 8, !dbg !60 |
| br label %for.inc, !dbg !61 |
| |
| for.inc: ; preds = %for.body.3 |
| %4 = load i32, ptr %i, align 4, !dbg !62 |
| %inc = add nsw i32 %4, 1, !dbg !62 |
| store i32 %inc, ptr %i, align 4, !dbg !62 |
| br label %for.cond.1, !dbg !64 |
| |
| for.end: ; preds = %for.cond.1 |
| br label %for.inc.4, !dbg !65 |
| |
| for.inc.4: ; preds = %for.end |
| %5 = load i32, ptr %k, align 4, !dbg !67 |
| %inc5 = add nsw i32 %5, 1, !dbg !67 |
| store i32 %inc5, ptr %k, align 4, !dbg !67 |
| br label %for.cond, !dbg !68 |
| |
| for.end.6: ; preds = %for.cond |
| %6 = load i64, ptr %sum, align 8, !dbg !69 |
| %cmp7 = icmp sgt i64 %6, 0, !dbg !70 |
| %cond = select i1 %cmp7, i32 0, i32 1, !dbg !69 |
| ret i32 %cond, !dbg !71 |
| } |
| |
| ; CHECK: ![[EC1]] = !{!"function_entry_count", i64 24109} |
| ; CHECK: ![[PROF1]] = !{!"branch_weights", i32 24109} |
| ; CHECK: ![[PROF2]] = !{!"branch_weights", i32 30125, i32 30125} |
| ; CHECK: ![[PROF3]] = !{!"branch_weights", i32 30124} |
| ; CHECK: ![[PROF4]] = !{!"branch_weights", i32 30125, i32 29580} |
| ; CHECK: ![[EC2]] = !{!"function_entry_count", i64 1} |
| ; CHECK: ![[PROF6]] = !{!"branch_weights", i32 1, i32 2} |
| ; CHECK: ![[PROF7]] = !{!"branch_weights", i32 18943, i32 1} |
| ; CHECK: ![[PROF8]] = !{!"branch_weights", i32 18942} |
| |
| attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "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" "use-sample-profile" } |
| attributes #1 = { nounwind readnone } |
| attributes #2 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "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 = { nounwind } |
| |
| !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 247554) (llvm/trunk 247557)", isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug, enums: !2) |
| !1 = !DIFile(filename: "discriminator.cc", directory: "/usr/local/google/home/dnovillo/llvm/test/autofdo") |
| !2 = !{} |
| !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, retainedNodes: !2) |
| !5 = !DISubroutineType(types: !6) |
| !6 = !{!7, !8} |
| !7 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed) |
| !8 = !DIBasicType(name: "long int", size: 64, align: 64, encoding: DW_ATE_signed) |
| !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, retainedNodes: !2) |
| !10 = !DISubroutineType(types: !11) |
| !11 = !{!12} |
| !12 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !13 = !{i32 2, !"Dwarf Version", i32 4} |
| !14 = !{i32 2, !"Debug Info Version", i32 3} |
| !15 = !{!"clang version 3.8.0 (trunk 247554) (llvm/trunk 247557)"} |
| !16 = !DILocalVariable(name: "i", arg: 1, scope: !4, file: !1, line: 3, type: !8) |
| !17 = !DIExpression() |
| !18 = !DILocation(line: 3, column: 24, scope: !4) |
| !19 = !DILocation(line: 4, column: 7, scope: !20) |
| !20 = distinct !DILexicalBlock(scope: !4, file: !1, line: 4, column: 7) |
| !21 = !DILocation(line: 4, column: 14, scope: !20) |
| !22 = !DILocation(line: 4, column: 7, scope: !4) |
| !23 = !DILocation(line: 4, column: 21, scope: !24) |
| !24 = !DILexicalBlockFile(scope: !20, file: !1, discriminator: 1) |
| !25 = !DILocation(line: 4, column: 40, scope: !26) |
| !26 = !DILexicalBlockFile(scope: !27, file: !1, discriminator: 2) |
| !27 = distinct !DILexicalBlock(scope: !20, file: !1, line: 4, column: 40) |
| !28 = !DILocation(line: 4, column: 47, scope: !27) |
| !29 = !DILocation(line: 4, column: 40, scope: !20) |
| !30 = !DILocation(line: 4, column: 55, scope: !31) |
| !31 = !DILexicalBlockFile(scope: !27, file: !1, discriminator: 3) |
| !32 = !DILocation(line: 4, column: 71, scope: !33) |
| !33 = !DILexicalBlockFile(scope: !27, file: !1, discriminator: 4) |
| !34 = !DILocation(line: 5, column: 1, scope: !4) |
| !35 = !DILocalVariable(name: "sum", scope: !9, file: !1, line: 8, type: !7) |
| !36 = !DILocation(line: 8, column: 17, scope: !9) |
| !37 = !DILocalVariable(name: "k", scope: !38, file: !1, line: 9, type: !12) |
| !38 = distinct !DILexicalBlock(scope: !9, file: !1, line: 9, column: 3) |
| !39 = !DILocation(line: 9, column: 12, scope: !38) |
| !40 = !DILocation(line: 9, column: 8, scope: !38) |
| !41 = !DILocation(line: 9, column: 19, scope: !42) |
| !42 = !DILexicalBlockFile(scope: !43, file: !1, discriminator: 2) |
| !43 = !DILexicalBlockFile(scope: !44, file: !1, discriminator: 1) |
| !44 = distinct !DILexicalBlock(scope: !38, file: !1, line: 9, column: 3) |
| !45 = !DILocation(line: 9, column: 21, scope: !44) |
| !46 = !DILocation(line: 9, column: 3, scope: !38) |
| !47 = !DILocalVariable(name: "i", scope: !48, file: !1, line: 10, type: !12) |
| !48 = distinct !DILexicalBlock(scope: !44, file: !1, line: 10, column: 5) |
| !49 = !DILocation(line: 10, column: 14, scope: !48) |
| !50 = !DILocation(line: 10, column: 10, scope: !48) |
| !51 = !DILocation(line: 10, column: 21, scope: !52) |
| !52 = !DILexicalBlockFile(scope: !53, file: !1, discriminator: 5) |
| !53 = !DILexicalBlockFile(scope: !54, file: !1, discriminator: 1) |
| !54 = distinct !DILexicalBlock(scope: !48, file: !1, line: 10, column: 5) |
| !55 = !DILocation(line: 10, column: 23, scope: !54) |
| !56 = !DILocation(line: 10, column: 5, scope: !48) |
| !57 = !DILocation(line: 10, column: 49, scope: !58) |
| !58 = !DILexicalBlockFile(scope: !54, file: !1, discriminator: 2) |
| !59 = !DILocation(line: 10, column: 45, scope: !54) |
| !60 = !DILocation(line: 10, column: 42, scope: !54) |
| !61 = !DILocation(line: 10, column: 38, scope: !54) |
| !62 = !DILocation(line: 10, column: 34, scope: !63) |
| !63 = !DILexicalBlockFile(scope: !54, file: !1, discriminator: 4) |
| !64 = !DILocation(line: 10, column: 5, scope: !54) |
| !65 = !DILocation(line: 10, column: 50, scope: !66) |
| !66 = !DILexicalBlockFile(scope: !48, file: !1, discriminator: 3) |
| !67 = !DILocation(line: 9, column: 30, scope: !44) |
| !68 = !DILocation(line: 9, column: 3, scope: !44) |
| !69 = !DILocation(line: 11, column: 10, scope: !9) |
| !70 = !DILocation(line: 11, column: 14, scope: !9) |
| !71 = !DILocation(line: 11, column: 3, scope: !9) |