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243ea6a7d6
The existing coverage tracker counts the number of records that were used from the input profile. An alternative view of coverage is to check how many available samples were applied. This way, if the profile contains several records with few samples, it doesn't really matter much that they were not applied. The more interesting records to apply are the ones that contribute many samples. llvm-svn: 253912
136 lines
6.2 KiB
LLVM
136 lines
6.2 KiB
LLVM
; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/inline-coverage.prof -sample-profile-check-record-coverage=100 -sample-profile-check-sample-coverage=110 -pass-remarks=sample-profile -o /dev/null 2>&1 | FileCheck %s
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;
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; Original code:
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;
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; 1 #include <stdlib.h>
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; 2
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; 3 long long int foo(long i) {
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; 4 return rand() * i;
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; 5 }
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; 6
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; 7 int main() {
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; 8 long long int sum = 0;
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; 9 for (int i = 0; i < 200000 * 3000; i++)
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; 10 sum += foo(i);
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; 11 return sum > 0 ? 0 : 1;
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; 12 }
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;
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; CHECK: remark: coverage.cc:10:12: inlined hot callee '_Z3fool' with 172746 samples into 'main'
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; CHECK: remark: coverage.cc:9:19: Applied 23478 samples from profile (offset: 2.1)
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; CHECK: remark: coverage.cc:10:16: Applied 23478 samples from profile (offset: 3)
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; CHECK: remark: coverage.cc:4:10: Applied 31878 samples from profile (offset: 1)
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; CHECK: remark: coverage.cc:11:10: Applied 0 samples from profile (offset: 4)
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; CHECK: remark: coverage.cc:10:16: most popular destination for conditional branches at coverage.cc:9:3
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;
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; There is one sample record with 0 samples at offset 4 in main() that we never
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; use:
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; CHECK: warning: coverage.cc:7: 4 of 5 available profile records (80%) were applied
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;
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; Since the unused sample record contributes no samples, sample coverage should
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; be 100%. Note that we get this warning because we are requesting an impossible
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; 110% coverage check.
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; CHECK: warning: coverage.cc:7: 78834 of 78834 available profile samples (100%) were applied
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define i64 @_Z3fool(i64 %i) !dbg !4 {
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entry:
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%i.addr = alloca i64, align 8
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store i64 %i, i64* %i.addr, align 8
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call void @llvm.dbg.declare(metadata i64* %i.addr, metadata !16, metadata !17), !dbg !18
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%call = call i32 @rand(), !dbg !19
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%conv = sext i32 %call to i64, !dbg !19
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%0 = load i64, i64* %i.addr, align 8, !dbg !20
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%mul = mul nsw i64 %conv, %0, !dbg !21
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ret i64 %mul, !dbg !22
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}
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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declare i32 @rand()
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define i32 @main() !dbg !9 {
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entry:
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%retval = alloca i32, align 4
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%sum = alloca i64, align 8
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%i = alloca i32, align 4
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store i32 0, i32* %retval, align 4
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call void @llvm.dbg.declare(metadata i64* %sum, metadata !23, metadata !17), !dbg !24
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store i64 0, i64* %sum, align 8, !dbg !24
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call void @llvm.dbg.declare(metadata i32* %i, metadata !25, metadata !17), !dbg !27
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store i32 0, i32* %i, align 4, !dbg !27
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br label %for.cond, !dbg !28
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for.cond: ; preds = %for.inc, %entry
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%0 = load i32, i32* %i, align 4, !dbg !29
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%cmp = icmp slt i32 %0, 600000000, !dbg !32
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br i1 %cmp, label %for.body, label %for.end, !dbg !33
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for.body: ; preds = %for.cond
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%1 = load i32, i32* %i, align 4, !dbg !34
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%conv = sext i32 %1 to i64, !dbg !34
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%call = call i64 @_Z3fool(i64 %conv), !dbg !35
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%2 = load i64, i64* %sum, align 8, !dbg !36
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%add = add nsw i64 %2, %call, !dbg !36
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store i64 %add, i64* %sum, align 8, !dbg !36
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br label %for.inc, !dbg !37
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for.inc: ; preds = %for.body
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%3 = load i32, i32* %i, align 4, !dbg !38
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%inc = add nsw i32 %3, 1, !dbg !38
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store i32 %inc, i32* %i, align 4, !dbg !38
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br label %for.cond, !dbg !39
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for.end: ; preds = %for.cond
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%4 = load i64, i64* %sum, align 8, !dbg !40
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%cmp1 = icmp sgt i64 %4, 0, !dbg !41
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%cond = select i1 %cmp1, i32 0, i32 1, !dbg !40
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ret i32 %cond, !dbg !42
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}
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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 251738) (llvm/trunk 251737)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3)
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!1 = !DIFile(filename: "coverage.cc", directory: ".")
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!2 = !{}
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!3 = !{!4, !9}
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!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, variables: !2)
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!5 = !DISubroutineType(types: !6)
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!6 = !{!7, !8}
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!7 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed)
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!8 = !DIBasicType(name: "long int", size: 64, align: 64, encoding: DW_ATE_signed)
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!9 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 7, type: !10, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
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!10 = !DISubroutineType(types: !11)
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!11 = !{!12}
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!12 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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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 251738) (llvm/trunk 251737)"}
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!16 = !DILocalVariable(name: "i", arg: 1, scope: !4, file: !1, line: 3, type: !8)
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!17 = !DIExpression()
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!18 = !DILocation(line: 3, column: 24, scope: !4)
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!19 = !DILocation(line: 4, column: 10, scope: !4)
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!20 = !DILocation(line: 4, column: 19, scope: !4)
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!21 = !DILocation(line: 4, column: 17, scope: !4)
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!22 = !DILocation(line: 4, column: 3, scope: !4)
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!23 = !DILocalVariable(name: "sum", scope: !9, file: !1, line: 8, type: !7)
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!24 = !DILocation(line: 8, column: 17, scope: !9)
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!25 = !DILocalVariable(name: "i", scope: !26, file: !1, line: 9, type: !12)
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!26 = distinct !DILexicalBlock(scope: !9, file: !1, line: 9, column: 3)
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!27 = !DILocation(line: 9, column: 12, scope: !26)
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!28 = !DILocation(line: 9, column: 8, scope: !26)
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!29 = !DILocation(line: 9, column: 19, scope: !30)
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!30 = !DILexicalBlockFile(scope: !31, file: !1, discriminator: 1)
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!31 = distinct !DILexicalBlock(scope: !26, file: !1, line: 9, column: 3)
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!32 = !DILocation(line: 9, column: 21, scope: !30)
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!33 = !DILocation(line: 9, column: 3, scope: !30)
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!34 = !DILocation(line: 10, column: 16, scope: !31)
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!35 = !DILocation(line: 10, column: 12, scope: !31)
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!36 = !DILocation(line: 10, column: 9, scope: !31)
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!37 = !DILocation(line: 10, column: 5, scope: !31)
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!38 = !DILocation(line: 9, column: 39, scope: !31)
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!39 = !DILocation(line: 9, column: 3, scope: !31)
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!40 = !DILocation(line: 11, column: 10, scope: !9)
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!41 = !DILocation(line: 11, column: 14, scope: !9)
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!42 = !DILocation(line: 11, column: 3, scope: !9)
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