136 lines
6.5 KiB
LLVM
136 lines
6.5 KiB
LLVM
; RUN: opt < %s -instcombine -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 -pass-remarks-analysis=sample-profile -o /dev/null 2>&1 | FileCheck %s
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; RUN: opt < %s -passes="function(instcombine),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 -pass-remarks-analysis=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: previous inlining reattempted for hotness: '_Z3fool' into 'main'
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; CHECK: remark: coverage.cc:9:21: 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: NoDebug, enums: !2)
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!1 = !DIFile(filename: "coverage.cc", directory: ".")
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!2 = !{}
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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, unit: !0, retainedNodes: !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, unit: !0, retainedNodes: !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: 2)
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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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