05782218ab
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
71 lines
3.4 KiB
LLVM
71 lines
3.4 KiB
LLVM
; RUN: opt -S < %s -globalopt | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@_ZL1x = internal global [200 x i8]* null, align 8, !dbg !0
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define i32 @main(i32 %argc, i8** %argv) norecurse !dbg !18 {
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; CHECK: define i32 @main
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; Make sure we localized the global.
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; CHECK: alloca [200 x i8]*
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; Make sure the metadata is sane. Currently, we just drop the metadata,
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; so it points to nothing.
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; CHECK: call void @llvm.dbg.value(metadata !2,
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; CHECK: !2 = !{}
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entry:
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call void @llvm.dbg.value(metadata i32 %argc, metadata !22, metadata !23), !dbg !24
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call void @llvm.dbg.value(metadata i8** %argv, metadata !25, metadata !23), !dbg !26
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%arrayidx = getelementptr inbounds i8*, i8** %argv, i64 0, !dbg !27
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%0 = load i8*, i8** %arrayidx, align 8, !dbg !27
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%1 = bitcast i8* %0 to [200 x i8]*, !dbg !28
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store [200 x i8]* %1, [200 x i8]** @_ZL1x, align 8, !dbg !29
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call void @llvm.dbg.value(metadata i8** bitcast ([200 x i8]** @_ZL1x to i8**), metadata !30, metadata !23), !dbg !31
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%2 = load i8*, i8** bitcast ([200 x i8]** @_ZL1x to i8**), align 8, !dbg !32
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%3 = load i8, i8* %2, align 1, !dbg !33
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%conv = sext i8 %3 to i32, !dbg !33
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ret i32 %conv, !dbg !34
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!15, !16}
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!llvm.ident = !{!17}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "x", linkageName: "_ZL1x", scope: !2, file: !14, line: 1, type: !6, isLocal: true, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !5, globals: !13)
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!3 = !DIFile(filename: "-", directory: "/")
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!4 = !{}
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!5 = !{!6, !11}
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!6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)
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!7 = !DICompositeType(tag: DW_TAG_array_type, baseType: !8, size: 1600, elements: !9)
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!8 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!9 = !{!10}
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!10 = !DISubrange(count: 200)
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64)
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!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64)
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!13 = !{!0}
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!14 = !DIFile(filename: "<stdin>", directory: "/")
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!15 = !{i32 2, !"Dwarf Version", i32 4}
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!16 = !{i32 2, !"Debug Info Version", i32 3}
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!17 = !{!"clang"}
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!18 = distinct !DISubprogram(name: "main", scope: !14, file: !14, line: 2, type: !19, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !2, variables: !4)
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!19 = !DISubroutineType(types: !20)
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!20 = !{!21, !21, !11}
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!21 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!22 = !DILocalVariable(name: "argc", arg: 1, scope: !18, file: !14, line: 2, type: !21)
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!23 = !DIExpression()
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!24 = !DILocation(line: 2, column: 14, scope: !18)
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!25 = !DILocalVariable(name: "argv", arg: 2, scope: !18, file: !14, line: 2, type: !11)
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!26 = !DILocation(line: 2, column: 26, scope: !18)
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!27 = !DILocation(line: 2, column: 52, scope: !18)
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!28 = !DILocation(line: 2, column: 38, scope: !18)
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!29 = !DILocation(line: 2, column: 36, scope: !18)
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!30 = !DILocalVariable(name: "y", scope: !18, file: !14, line: 2, type: !11)
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!31 = !DILocation(line: 2, column: 68, scope: !18)
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!32 = !DILocation(line: 2, column: 92, scope: !18)
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!33 = !DILocation(line: 2, column: 91, scope: !18)
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!34 = !DILocation(line: 2, column: 84, scope: !18)
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