1 files changed, 147 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SampleProfile/cov-zero-samples.ll b/llvm/test/Transforms/SampleProfile/cov-zero-samples.ll
new file mode 100644
index 00000000000..9eb312aa4c0
--- /dev/null
+++ b/llvm/test/Transforms/SampleProfile/cov-zero-samples.ll
@@ -0,0 +1,147 @@
+; 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
+; 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
+;
+; CHECK: remark: cov-zero-samples.cc:9:29: Applied 404065 samples from profile (offset: 2.1)
+; CHECK: remark: cov-zero-samples.cc:10:9: Applied 443089 samples from profile (offset: 3)
+; CHECK: remark: cov-zero-samples.cc:10:36: Applied 0 samples from profile (offset: 3.1)
+; CHECK: remark: cov-zero-samples.cc:11:12: Applied 404066 samples from profile (offset: 4)
+; CHECK: remark: cov-zero-samples.cc:13:25: Applied 0 samples from profile (offset: 6)
+; CHECK: remark: cov-zero-samples.cc:14:3: Applied 0 samples from profile (offset: 7)
+; CHECK: remark: cov-zero-samples.cc:10:9: most popular destination for conditional branches at cov-zero-samples.cc:9:3
+; CHECK: remark: cov-zero-samples.cc:11:12: most popular destination for conditional branches at cov-zero-samples.cc:10:9
+;
+; Coverage for this profile should be 100%
+; CHECK-NOT: warning: cov-zero-samples.cc:1:
+
+source_filename = "test/Transforms/SampleProfile/cov-zero-samples.ll"
+
+@N = global i64 8000000000, align 8, !dbg !0
+@.str = private unnamed_addr constant [11 x i8] c"sum is %d\0A\00", align 1
+
+define i32 @_Z12never_calledi(i32 %i) !dbg !11 {
+entry:
+  ret i32 0, !dbg !15
+}
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
+
+define i32 @main() !dbg !17 {
+entry:
+  %retval = alloca i32, align 4
+  %sum = alloca i32, align 4
+  %i = alloca i64, align 8
+  store i32 0, i32* %retval, align 4
+  call void @llvm.dbg.declare(metadata i32* %sum, metadata !20, metadata !21), !dbg !22
+  store i32 0, i32* %sum, align 4, !dbg !22
+  call void @llvm.dbg.declare(metadata i64* %i, metadata !23, metadata !21), !dbg !25
+  store i64 0, i64* %i, align 8, !dbg !25
+  br label %for.cond, !dbg !26
+
+for.cond:                                         ; preds = %for.inc, %entry
+
+  %0 = load i64, i64* %i, align 8, !dbg !27
+  %1 = load volatile i64, i64* @N, align 8, !dbg !30
+  %cmp = icmp slt i64 %0, %1, !dbg !31
+  br i1 %cmp, label %for.body, label %for.end, !dbg !32
+
+for.body:                                         ; preds = %for.cond
+  %2 = load i64, i64* %i, align 8, !dbg !33
+  %3 = load volatile i64, i64* @N, align 8, !dbg !36
+  %cmp1 = icmp sgt i64 %2, %3, !dbg !37
+  br i1 %cmp1, label %if.then, label %if.end, !dbg !38
+
+if.then:                                          ; preds = %for.body
+  %4 = load i64, i64* %i, align 8, !dbg !39
+  %conv = trunc i64 %4 to i32, !dbg !39
+  %call = call i32 @_Z12never_calledi(i32 %conv), !dbg !41
+  %5 = load i32, i32* %sum, align 4, !dbg !42
+  %add = add nsw i32 %5, %call, !dbg !42
+  store i32 %add, i32* %sum, align 4, !dbg !42
+  br label %if.end, !dbg !43
+
+if.end:                                           ; preds = %if.then, %for.body
+  %6 = load i64, i64* %i, align 8, !dbg !44
+  %div = sdiv i64 %6, 239, !dbg !45
+  %7 = load i32, i32* %sum, align 4, !dbg !46
+  %conv2 = sext i32 %7 to i64, !dbg !46
+  %mul = mul nsw i64 %conv2, %div, !dbg !46
+  %conv3 = trunc i64 %mul to i32, !dbg !46
+  store i32 %conv3, i32* %sum, align 4, !dbg !46
+  br label %for.inc, !dbg !47
+
+for.inc:                                          ; preds = %if.end
+  %8 = load i64, i64* %i, align 8, !dbg !48
+  %inc = add nsw i64 %8, 1, !dbg !48
+  store i64 %inc, i64* %i, align 8, !dbg !48
+  br label %for.cond, !dbg !50
+
+for.end:                                          ; preds = %for.cond
+  %9 = load i32, i32* %sum, align 4, !dbg !51
+  %call4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i32 0, i32 0), i32 %9), !dbg !52
+  ret i32 0, !dbg !53
+}
+
+declare i32 @printf(i8*, ...)
+
+attributes #0 = { nounwind readnone }
+
+!llvm.dbg.cu = !{!2}
+!llvm.module.flags = !{!8, !9}
+!llvm.ident = !{!10}
+
+!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
+!1 = !DIGlobalVariable(name: "N", scope: !2, file: !3, line: 3, type: !6, isLocal: false, isDefinition: true)
+!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)
+!3 = !DIFile(filename: "cov-zero-samples.cc", directory: ".")
+!4 = !{}
+!5 = !{!0}
+!6 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7)
+!7 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed)
+!8 = !{i32 2, !"Dwarf Version", i32 4}
+!9 = !{i32 2, !"Debug Info Version", i32 3}
+!10 = !{!"clang version 3.8.0 (trunk 253667) (llvm/trunk 253670)"}
+!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)
+!12 = !DISubroutineType(types: !13)
+!13 = !{!14, !14}
+!14 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!15 = !DILocation(line: 5, column: 27, scope: !16)
+!16 = !DILexicalBlockFile(scope: !11, file: !3, discriminator: 6)
+!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)
+!18 = !DISubroutineType(types: !19)
+!19 = !{!14}
+!20 = !DILocalVariable(name: "sum", scope: !17, file: !3, line: 8, type: !14)
+!21 = !DIExpression()
+!22 = !DILocation(line: 8, column: 7, scope: !17)
+!23 = !DILocalVariable(name: "i", scope: !24, file: !3, line: 9, type: !7)
+!24 = distinct !DILexicalBlock(scope: !17, file: !3, line: 9, column: 3)
+!25 = !DILocation(line: 9, column: 18, scope: !24)
+!26 = !DILocation(line: 9, column: 8, scope: !24)
+!27 = !DILocation(line: 9, column: 25, scope: !28)
+!28 = !DILexicalBlockFile(scope: !29, file: !3, discriminator: 2)
+!29 = distinct !DILexicalBlock(scope: !24, file: !3, line: 9, column: 3)
+!30 = !DILocation(line: 9, column: 29, scope: !28)
+!31 = !DILocation(line: 9, column: 27, scope: !28)
+!32 = !DILocation(line: 9, column: 3, scope: !28)
+!33 = !DILocation(line: 10, column: 9, scope: !34)
+!34 = distinct !DILexicalBlock(scope: !35, file: !3, line: 10, column: 9)
+!35 = distinct !DILexicalBlock(scope: !29, file: !3, line: 9, column: 37)
+!36 = !DILocation(line: 10, column: 13, scope: !34)
+!37 = !DILocation(line: 10, column: 11, scope: !34)
+!38 = !DILocation(line: 10, column: 9, scope: !35)
+!39 = !DILocation(line: 10, column: 36, scope: !40)
+!40 = !DILexicalBlockFile(scope: !34, file: !3, discriminator: 2)
+!41 = !DILocation(line: 10, column: 23, scope: !40)
+!42 = !DILocation(line: 10, column: 20, scope: !40)
+!43 = !DILocation(line: 10, column: 16, scope: !40)
+!44 = !DILocation(line: 11, column: 12, scope: !35)
+!45 = !DILocation(line: 11, column: 14, scope: !35)
+!46 = !DILocation(line: 11, column: 9, scope: !35)
+!47 = !DILocation(line: 12, column: 3, scope: !35)
+!48 = !DILocation(line: 9, column: 33, scope: !49)
+!49 = !DILexicalBlockFile(scope: !29, file: !3, discriminator: 4)
+!50 = !DILocation(line: 9, column: 3, scope: !49)
+!51 = !DILocation(line: 13, column: 25, scope: !17)
+!52 = !DILocation(line: 13, column: 3, scope: !17)
+!53 = !DILocation(line: 14, column: 3, scope: !17)
+