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1; RUN: opt < %s -instcombine -sample-profile -sample-profile-file=%S/Inputs/cov-zero-samples.prof -sample-profile-check-record-coverage=100 -pass-remarks=sample-profile -pass-remarks-analysis=sample-profile -o /dev/null 2>&1 | FileCheck %s
2; RUN: opt < %s -passes="function(instcombine),sample-profile" -sample-profile-file=%S/Inputs/cov-zero-samples.prof -sample-profile-check-record-coverage=100 -pass-remarks=sample-profile -pass-remarks-analysis=sample-profile -o /dev/null 2>&1 | FileCheck %s
3;
4; CHECK: remark: cov-zero-samples.cc:9:29: Applied 404065 samples from profile (offset: 2.1)
5; CHECK: remark: cov-zero-samples.cc:10:9: Applied 443089 samples from profile (offset: 3)
6; CHECK: remark: cov-zero-samples.cc:10:36: Applied 0 samples from profile (offset: 3.1)
7; CHECK: remark: cov-zero-samples.cc:11:12: Applied 404066 samples from profile (offset: 4)
8; CHECK: remark: cov-zero-samples.cc:13:25: Applied 0 samples from profile (offset: 6)
9; CHECK: remark: cov-zero-samples.cc:14:3: Applied 0 samples from profile (offset: 7)
10; CHECK: remark: cov-zero-samples.cc:10:9: most popular destination for conditional branches at cov-zero-samples.cc:9:3
11; CHECK: remark: cov-zero-samples.cc:11:12: most popular destination for conditional branches at cov-zero-samples.cc:10:9
12;
13; Coverage for this profile should be 100%
14; CHECK-NOT: warning: cov-zero-samples.cc:1:
15
16source_filename = "test/Transforms/SampleProfile/cov-zero-samples.ll"
17
18@N = global i64 8000000000, align 8, !dbg !0
19@.str = private unnamed_addr constant [11 x i8] c"sum is %d\0A\00", align 1
20
21define i32 @_Z12never_calledi(i32 %i) #1 !dbg !11 {
22entry:
23  ret i32 0, !dbg !15
24}
25
26; Function Attrs: nounwind readnone
27declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
28
29define i32 @main() #1 !dbg !17 {
30entry:
31  %retval = alloca i32, align 4
32  %sum = alloca i32, align 4
33  %i = alloca i64, align 8
34  store i32 0, i32* %retval, align 4
35  call void @llvm.dbg.declare(metadata i32* %sum, metadata !20, metadata !21), !dbg !22
36  store i32 0, i32* %sum, align 4, !dbg !22
37  call void @llvm.dbg.declare(metadata i64* %i, metadata !23, metadata !21), !dbg !25
38  store i64 0, i64* %i, align 8, !dbg !25
39  br label %for.cond, !dbg !26
40
41for.cond:                                         ; preds = %for.inc, %entry
42
43  %0 = load i64, i64* %i, align 8, !dbg !27
44  %1 = load volatile i64, i64* @N, align 8, !dbg !30
45  %cmp = icmp slt i64 %0, %1, !dbg !31
46  br i1 %cmp, label %for.body, label %for.end, !dbg !32
47
48for.body:                                         ; preds = %for.cond
49  %2 = load i64, i64* %i, align 8, !dbg !33
50  %3 = load volatile i64, i64* @N, align 8, !dbg !36
51  %cmp1 = icmp sgt i64 %2, %3, !dbg !37
52  br i1 %cmp1, label %if.then, label %if.end, !dbg !38
53
54if.then:                                          ; preds = %for.body
55  %4 = load i64, i64* %i, align 8, !dbg !39
56  %conv = trunc i64 %4 to i32, !dbg !39
57  %call = call i32 @_Z12never_calledi(i32 %conv), !dbg !41
58  %5 = load i32, i32* %sum, align 4, !dbg !42
59  %add = add nsw i32 %5, %call, !dbg !42
60  store i32 %add, i32* %sum, align 4, !dbg !42
61  br label %if.end, !dbg !43
62
63if.end:                                           ; preds = %if.then, %for.body
64  %6 = load i64, i64* %i, align 8, !dbg !44
65  %div = sdiv i64 %6, 239, !dbg !45
66  %7 = load i32, i32* %sum, align 4, !dbg !46
67  %conv2 = sext i32 %7 to i64, !dbg !46
68  %mul = mul nsw i64 %conv2, %div, !dbg !46
69  %conv3 = trunc i64 %mul to i32, !dbg !46
70  store i32 %conv3, i32* %sum, align 4, !dbg !46
71  br label %for.inc, !dbg !47
72
73for.inc:                                          ; preds = %if.end
74  %8 = load i64, i64* %i, align 8, !dbg !48
75  %inc = add nsw i64 %8, 1, !dbg !48
76  store i64 %inc, i64* %i, align 8, !dbg !48
77  br label %for.cond, !dbg !50
78
79for.end:                                          ; preds = %for.cond
80  %9 = load i32, i32* %sum, align 4, !dbg !51
81  %call4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i32 0, i32 0), i32 %9), !dbg !52
82  ret i32 0, !dbg !53
83}
84
85declare i32 @printf(i8*, ...)
86
87attributes #0 = { nounwind readnone }
88attributes #1 = {"use-sample-profile"}
89
90!llvm.dbg.cu = !{!2}
91!llvm.module.flags = !{!8, !9}
92!llvm.ident = !{!10}
93
94!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
95!1 = !DIGlobalVariable(name: "N", scope: !2, file: !3, line: 3, type: !6, isLocal: false, isDefinition: true)
96!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 3.8.0 (trunk 253667) (llvm/trunk 253670)", isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug, enums: !4, globals: !5)
97!3 = !DIFile(filename: "cov-zero-samples.cc", directory: ".")
98!4 = !{}
99!5 = !{!0}
100!6 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7)
101!7 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed)
102!8 = !{i32 2, !"Dwarf Version", i32 4}
103!9 = !{i32 2, !"Debug Info Version", i32 3}
104!10 = !{!"clang version 3.8.0 (trunk 253667) (llvm/trunk 253670)"}
105!11 = distinct !DISubprogram(name: "never_called", linkageName: "_Z12never_calledi", scope: !3, file: !3, line: 5, type: !12, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false, unit: !2, retainedNodes: !4)
106!12 = !DISubroutineType(types: !13)
107!13 = !{!14, !14}
108!14 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
109!15 = !DILocation(line: 5, column: 27, scope: !16)
110!16 = !DILexicalBlockFile(scope: !11, file: !3, discriminator: 6)
111!17 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 7, type: !18, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: false, unit: !2, retainedNodes: !4)
112!18 = !DISubroutineType(types: !19)
113!19 = !{!14}
114!20 = !DILocalVariable(name: "sum", scope: !17, file: !3, line: 8, type: !14)
115!21 = !DIExpression()
116!22 = !DILocation(line: 8, column: 7, scope: !17)
117!23 = !DILocalVariable(name: "i", scope: !24, file: !3, line: 9, type: !7)
118!24 = distinct !DILexicalBlock(scope: !17, file: !3, line: 9, column: 3)
119!25 = !DILocation(line: 9, column: 18, scope: !24)
120!26 = !DILocation(line: 9, column: 8, scope: !24)
121!27 = !DILocation(line: 9, column: 25, scope: !28)
122!28 = !DILexicalBlockFile(scope: !29, file: !3, discriminator: 2)
123!29 = distinct !DILexicalBlock(scope: !24, file: !3, line: 9, column: 3)
124!30 = !DILocation(line: 9, column: 29, scope: !28)
125!31 = !DILocation(line: 9, column: 27, scope: !28)
126!32 = !DILocation(line: 9, column: 3, scope: !28)
127!33 = !DILocation(line: 10, column: 9, scope: !34)
128!34 = distinct !DILexicalBlock(scope: !35, file: !3, line: 10, column: 9)
129!35 = distinct !DILexicalBlock(scope: !29, file: !3, line: 9, column: 37)
130!36 = !DILocation(line: 10, column: 13, scope: !34)
131!37 = !DILocation(line: 10, column: 11, scope: !34)
132!38 = !DILocation(line: 10, column: 9, scope: !35)
133!39 = !DILocation(line: 10, column: 36, scope: !40)
134!40 = !DILexicalBlockFile(scope: !34, file: !3, discriminator: 2)
135!41 = !DILocation(line: 10, column: 23, scope: !40)
136!42 = !DILocation(line: 10, column: 20, scope: !40)
137!43 = !DILocation(line: 10, column: 16, scope: !40)
138!44 = !DILocation(line: 11, column: 12, scope: !35)
139!45 = !DILocation(line: 11, column: 14, scope: !35)
140!46 = !DILocation(line: 11, column: 9, scope: !35)
141!47 = !DILocation(line: 12, column: 3, scope: !35)
142!48 = !DILocation(line: 9, column: 33, scope: !49)
143!49 = !DILexicalBlockFile(scope: !29, file: !3, discriminator: 4)
144!50 = !DILocation(line: 9, column: 3, scope: !49)
145!51 = !DILocation(line: 13, column: 25, scope: !17)
146!52 = !DILocation(line: 13, column: 3, scope: !17)
147!53 = !DILocation(line: 14, column: 3, scope: !17)
148
149