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llvm-mirror/test/Transforms/SampleProfile/cov-zero-samples.ll
Adrian Prantl 7d6813a6c8 Canonicalize the representation of empty an expression in DIGlobalVariableExpression 
This change simplifies code that has to deal with
DIGlobalVariableExpression and mirrors how we treat DIExpressions in
debug info intrinsics. Before this change there were two ways of
representing empty expressions on globals, a nullptr and an empty
!DIExpression().

If someone needs to upgrade out-of-tree testcases:
  perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll>
will catch 95%.

llvm-svn: 312144
2017-08-30 18:06:51 +00:00

148 lines
7.4 KiB
LLVM
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; 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, variables: !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, variables: !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)
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