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1; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/cov-zero-samples.prof -sample-profile-check-record-coverage=100 -pass-remarks=sample-profile -o /dev/null 2>&1 | FileCheck %s
2;
3; CHECK: remark: cov-zero-samples.cc:9:25: Applied 404065 samples from profile (offset: 2.1)
4; CHECK: remark: cov-zero-samples.cc:10:9: Applied 443089 samples from profile (offset: 3)
5; CHECK: remark: cov-zero-samples.cc:10:36: Applied 0 samples from profile (offset: 3.1)
6; CHECK: remark: cov-zero-samples.cc:11:12: Applied 404066 samples from profile (offset: 4)
7; CHECK: remark: cov-zero-samples.cc:13:25: Applied 0 samples from profile (offset: 6)
8; CHECK: remark: cov-zero-samples.cc:14:3: Applied 0 samples from profile (offset: 7)
9; CHECK: remark: cov-zero-samples.cc:10:9: most popular destination for conditional branches at cov-zero-samples.cc:9:3
10; CHECK: remark: cov-zero-samples.cc:11:12: most popular destination for conditional branches at cov-zero-samples.cc:10:9
11;
12; Coverage for this profile should be 100%
13; CHECK-NOT: warning: cov-zero-samples.cc:1:
14
15@N = global i64 8000000000, align 8
16@.str = private unnamed_addr constant [11 x i8] c"sum is %d\0A\00", align 1
17
18; Function Attrs: nounwind uwtable
19define i32 @_Z12never_calledi(i32 %i) !dbg !4 {
20entry:
21  ret i32 0, !dbg !32
22}
23
24; Function Attrs: nounwind readnone
25declare void @llvm.dbg.declare(metadata, metadata, metadata)
26
27; Function Attrs: norecurse uwtable
28define i32 @main() !dbg !8 {
29entry:
30  %retval = alloca i32, align 4
31  %sum = alloca i32, align 4
32  %i = alloca i64, align 8
33  store i32 0, i32* %retval, align 4
34  call void @llvm.dbg.declare(metadata i32* %sum, metadata !33, metadata !19), !dbg !34
35  store i32 0, i32* %sum, align 4, !dbg !34
36  call void @llvm.dbg.declare(metadata i64* %i, metadata !35, metadata !19), !dbg !37
37  store i64 0, i64* %i, align 8, !dbg !37
38  br label %for.cond, !dbg !38
39
40for.cond:                                         ; preds = %for.inc, %entry
41  %0 = load i64, i64* %i, align 8, !dbg !39
42  %1 = load volatile i64, i64* @N, align 8, !dbg !42
43  %cmp = icmp slt i64 %0, %1, !dbg !43
44  br i1 %cmp, label %for.body, label %for.end, !dbg !44
45
46for.body:                                         ; preds = %for.cond
47  %2 = load i64, i64* %i, align 8, !dbg !45
48  %3 = load volatile i64, i64* @N, align 8, !dbg !48
49  %cmp1 = icmp sgt i64 %2, %3, !dbg !49
50  br i1 %cmp1, label %if.then, label %if.end, !dbg !50
51
52if.then:                                          ; preds = %for.body
53  %4 = load i64, i64* %i, align 8, !dbg !51
54  %conv = trunc i64 %4 to i32, !dbg !51
55  %call = call i32 @_Z12never_calledi(i32 %conv), !dbg !53
56  %5 = load i32, i32* %sum, align 4, !dbg !54
57  %add = add nsw i32 %5, %call, !dbg !54
58  store i32 %add, i32* %sum, align 4, !dbg !54
59  br label %if.end, !dbg !55
60
61if.end:                                           ; preds = %if.then, %for.body
62  %6 = load i64, i64* %i, align 8, !dbg !56
63  %div = sdiv i64 %6, 239, !dbg !57
64  %7 = load i32, i32* %sum, align 4, !dbg !58
65  %conv2 = sext i32 %7 to i64, !dbg !58
66  %mul = mul nsw i64 %conv2, %div, !dbg !58
67  %conv3 = trunc i64 %mul to i32, !dbg !58
68  store i32 %conv3, i32* %sum, align 4, !dbg !58
69  br label %for.inc, !dbg !59
70
71for.inc:                                          ; preds = %if.end
72  %8 = load i64, i64* %i, align 8, !dbg !60
73  %inc = add nsw i64 %8, 1, !dbg !60
74  store i64 %inc, i64* %i, align 8, !dbg !60
75  br label %for.cond, !dbg !62
76
77for.end:                                          ; preds = %for.cond
78  %9 = load i32, i32* %sum, align 4, !dbg !63
79  %call4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i32 0, i32 0), i32 %9), !dbg !64
80  ret i32 0, !dbg !65
81}
82
83declare i32 @printf(i8*, ...)
84
85!llvm.dbg.cu = !{!0}
86!llvm.module.flags = !{!15, !16}
87!llvm.ident = !{!17}
88
89!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 253667) (llvm/trunk 253670)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3, globals: !11)
90!1 = !DIFile(filename: "cov-zero-samples.cc", directory: ".")
91!2 = !{}
92!3 = !{!4, !8}
93!4 = distinct !DISubprogram(name: "never_called", linkageName: "_Z12never_calledi", scope: !1, file: !1, line: 5, type: !5, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
94!5 = !DISubroutineType(types: !6)
95!6 = !{!7, !7}
96!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
97!8 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 7, type: !9, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
98!9 = !DISubroutineType(types: !10)
99!10 = !{!7}
100!11 = !{!12}
101!12 = !DIGlobalVariable(name: "N", scope: !0, file: !1, line: 3, type: !13, isLocal: false, isDefinition: true, variable: i64* @N)
102!13 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !14)
103!14 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed)
104!15 = !{i32 2, !"Dwarf Version", i32 4}
105!16 = !{i32 2, !"Debug Info Version", i32 3}
106!17 = !{!"clang version 3.8.0 (trunk 253667) (llvm/trunk 253670)"}
107!19 = !DIExpression()
108!31 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 3)
109!32 = !DILocation(line: 5, column: 27, scope: !31)
110!33 = !DILocalVariable(name: "sum", scope: !8, file: !1, line: 8, type: !7)
111!34 = !DILocation(line: 8, column: 7, scope: !8)
112!35 = !DILocalVariable(name: "i", scope: !36, file: !1, line: 9, type: !14)
113!36 = distinct !DILexicalBlock(scope: !8, file: !1, line: 9, column: 3)
114!37 = !DILocation(line: 9, column: 18, scope: !36)
115!38 = !DILocation(line: 9, column: 8, scope: !36)
116!39 = !DILocation(line: 9, column: 25, scope: !40)
117!40 = !DILexicalBlockFile(scope: !41, file: !1, discriminator: 1)
118!41 = distinct !DILexicalBlock(scope: !36, file: !1, line: 9, column: 3)
119!42 = !DILocation(line: 9, column: 29, scope: !40)
120!43 = !DILocation(line: 9, column: 27, scope: !40)
121!44 = !DILocation(line: 9, column: 3, scope: !40)
122!45 = !DILocation(line: 10, column: 9, scope: !46)
123!46 = distinct !DILexicalBlock(scope: !47, file: !1, line: 10, column: 9)
124!47 = distinct !DILexicalBlock(scope: !41, file: !1, line: 9, column: 37)
125!48 = !DILocation(line: 10, column: 13, scope: !46)
126!49 = !DILocation(line: 10, column: 11, scope: !46)
127!50 = !DILocation(line: 10, column: 9, scope: !47)
128!51 = !DILocation(line: 10, column: 36, scope: !52)
129!52 = !DILexicalBlockFile(scope: !46, file: !1, discriminator: 1)
130!53 = !DILocation(line: 10, column: 23, scope: !52)
131!54 = !DILocation(line: 10, column: 20, scope: !52)
132!55 = !DILocation(line: 10, column: 16, scope: !52)
133!56 = !DILocation(line: 11, column: 12, scope: !47)
134!57 = !DILocation(line: 11, column: 14, scope: !47)
135!58 = !DILocation(line: 11, column: 9, scope: !47)
136!59 = !DILocation(line: 12, column: 3, scope: !47)
137!60 = !DILocation(line: 9, column: 33, scope: !61)
138!61 = !DILexicalBlockFile(scope: !41, file: !1, discriminator: 2)
139!62 = !DILocation(line: 9, column: 3, scope: !61)
140!63 = !DILocation(line: 13, column: 25, scope: !8)
141!64 = !DILocation(line: 13, column: 3, scope: !8)
142!65 = !DILocation(line: 14, column: 3, scope: !8)
143