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a2029fa58e
In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
115 lines
7.0 KiB
LLVM
115 lines
7.0 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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; Radar 9309221
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; Test dwarf reg no for d16
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;CHECK: DW_OP_regx
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;CHECK-NEXT: 272
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target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n32"
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target triple = "thumbv7-apple-darwin10"
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@.str = private unnamed_addr constant [11 x i8] c"%p %lf %c\0A\00", align 4
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@.str1 = private unnamed_addr constant [6 x i8] c"point\00", align 4
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define i32 @inlineprinter(i8* %ptr, double %val, i8 zeroext %c) nounwind optsize !dbg !9 {
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entry:
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tail call void @llvm.dbg.value(metadata i8* %ptr, metadata !19, metadata !DIExpression()), !dbg !26
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tail call void @llvm.dbg.value(metadata double %val, metadata !20, metadata !DIExpression()), !dbg !26
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tail call void @llvm.dbg.value(metadata i8 %c, metadata !21, metadata !DIExpression()), !dbg !26
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%0 = zext i8 %c to i32, !dbg !27
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%1 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i32 0, i32 0), i8* %ptr, double %val, i32 %0) nounwind, !dbg !27
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ret i32 0, !dbg !29
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}
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define i32 @printer(i8* %ptr, double %val, i8 zeroext %c) nounwind optsize noinline !dbg !0 {
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entry:
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tail call void @llvm.dbg.value(metadata i8* %ptr, metadata !16, metadata !DIExpression()), !dbg !30
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tail call void @llvm.dbg.value(metadata double %val, metadata !17, metadata !DIExpression()), !dbg !30
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tail call void @llvm.dbg.value(metadata i8 %c, metadata !18, metadata !DIExpression()), !dbg !30
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%0 = zext i8 %c to i32, !dbg !31
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%1 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i32 0, i32 0), i8* %ptr, double %val, i32 %0) nounwind, !dbg !31
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ret i32 0, !dbg !33
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}
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declare i32 @printf(i8* nocapture, ...) nounwind
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declare void @llvm.dbg.value(metadata, metadata, metadata) nounwind readnone
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define i32 @main(i32 %argc, i8** nocapture %argv) nounwind optsize !dbg !10 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 %argc, metadata !22, metadata !DIExpression()), !dbg !34
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tail call void @llvm.dbg.value(metadata i8** %argv, metadata !23, metadata !DIExpression()), !dbg !34
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%0 = sitofp i32 %argc to double, !dbg !35
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%1 = fadd double %0, 5.555552e+05, !dbg !35
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tail call void @llvm.dbg.value(metadata double %1, metadata !24, metadata !DIExpression()), !dbg !35
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%2 = tail call i32 @puts(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str1, i32 0, i32 0)) nounwind, !dbg !36
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%3 = getelementptr inbounds i8, i8* bitcast (i32 (i32, i8**)* @main to i8*), i32 %argc, !dbg !37
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%4 = trunc i32 %argc to i8, !dbg !37
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%5 = add i8 %4, 97, !dbg !37
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tail call void @llvm.dbg.value(metadata i8* %3, metadata !49, metadata !DIExpression()) nounwind, !dbg !38
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tail call void @llvm.dbg.value(metadata double %1, metadata !50, metadata !DIExpression()) nounwind, !dbg !38
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tail call void @llvm.dbg.value(metadata i8 %5, metadata !51, metadata !DIExpression()) nounwind, !dbg !38
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%6 = zext i8 %5 to i32, !dbg !39
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%7 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i32 0, i32 0), i8* %3, double %1, i32 %6) nounwind, !dbg !39
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%8 = tail call i32 @printer(i8* %3, double %1, i8 zeroext %5) nounwind, !dbg !40
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ret i32 0, !dbg !41
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}
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declare i32 @puts(i8* nocapture) nounwind
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!48}
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!0 = distinct !DISubprogram(name: "printer", linkageName: "printer", line: 12, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, scopeLine: 12, file: !46, scope: !1, type: !3, retainedNodes: !43)
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!1 = !DIFile(filename: "a.c", directory: "/tmp/")
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!2 = distinct !DICompileUnit(language: DW_LANG_C89, producer: "(LLVM build 00)", isOptimized: true, emissionKind: FullDebug, file: !46, enums: !47, retainedTypes: !47, imports: null)
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!3 = !DISubroutineType(types: !4)
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!4 = !{!5, !6, !7, !8}
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!5 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!6 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, file: !46, scope: !1, baseType: null)
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!7 = !DIBasicType(tag: DW_TAG_base_type, name: "double", size: 64, align: 32, encoding: DW_ATE_float)
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!8 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned char", size: 8, align: 8, encoding: DW_ATE_unsigned_char)
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!9 = distinct !DISubprogram(name: "inlineprinter", linkageName: "inlineprinter", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, scopeLine: 5, file: !46, scope: !1, type: !3, retainedNodes: !44)
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!10 = distinct !DISubprogram(name: "main", linkageName: "main", line: 18, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, scopeLine: 18, file: !46, scope: !1, type: !11, retainedNodes: !45)
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!11 = !DISubroutineType(types: !12)
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!12 = !{!5, !5, !13}
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!13 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, file: !46, scope: !1, baseType: !14)
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!14 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, file: !46, scope: !1, baseType: !15)
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!15 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!16 = !DILocalVariable(name: "ptr", line: 11, arg: 1, scope: !0, file: !1, type: !6)
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!17 = !DILocalVariable(name: "val", line: 11, arg: 2, scope: !0, file: !1, type: !7)
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!18 = !DILocalVariable(name: "c", line: 11, arg: 3, scope: !0, file: !1, type: !8)
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!19 = !DILocalVariable(name: "ptr", line: 4, arg: 1, scope: !9, file: !1, type: !6)
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!20 = !DILocalVariable(name: "val", line: 4, arg: 2, scope: !9, file: !1, type: !7)
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!21 = !DILocalVariable(name: "c", line: 4, arg: 3, scope: !9, file: !1, type: !8)
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!49 = !DILocalVariable(name: "ptr", line: 4, scope: !10, file: !1, type: !6)
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!50 = !DILocalVariable(name: "val", line: 4, scope: !10, file: !1, type: !7)
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!51 = !DILocalVariable(name: "c", line: 4, scope: !10, file: !1, type: !8)
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!22 = !DILocalVariable(name: "argc", line: 17, arg: 1, scope: !10, file: !1, type: !5)
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!23 = !DILocalVariable(name: "argv", line: 17, arg: 2, scope: !10, file: !1, type: !13)
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!24 = !DILocalVariable(name: "dval", line: 19, scope: !25, file: !1, type: !7)
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!25 = distinct !DILexicalBlock(line: 18, column: 0, file: !46, scope: !10)
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!26 = !DILocation(line: 4, scope: !9)
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!27 = !DILocation(line: 6, scope: !28)
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!28 = distinct !DILexicalBlock(line: 5, column: 0, file: !46, scope: !9)
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!29 = !DILocation(line: 7, scope: !28)
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!30 = !DILocation(line: 11, scope: !0)
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!31 = !DILocation(line: 13, scope: !32)
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!32 = distinct !DILexicalBlock(line: 12, column: 0, file: !46, scope: !0)
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!33 = !DILocation(line: 14, scope: !32)
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!34 = !DILocation(line: 17, scope: !10)
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!35 = !DILocation(line: 19, scope: !25)
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!36 = !DILocation(line: 20, scope: !25)
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!37 = !DILocation(line: 21, scope: !25)
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!38 = !DILocation(line: 4, scope: !10, inlinedAt: !37)
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!39 = !DILocation(line: 6, scope: !28, inlinedAt: !37)
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!40 = !DILocation(line: 22, scope: !25)
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!41 = !DILocation(line: 23, scope: !25)
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!43 = !{!16, !17, !18}
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!44 = !{!19, !20, !21}
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!45 = !{!22, !23, !24}
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!46 = !DIFile(filename: "a.c", directory: "/tmp/")
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!47 = !{}
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!48 = !{i32 1, !"Debug Info Version", i32 3}
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