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Currently each Function points to a DISubprogram and DISubprogram has a scope field. For member functions the scope is a DICompositeType. DIScopes point to the DICompileUnit to facilitate type uniquing. Distinct DISubprograms (with isDefinition: true) are not part of the type hierarchy and cannot be uniqued. This change removes the subprograms list from DICompileUnit and instead adds a pointer to the owning compile unit to distinct DISubprograms. This would make it easy for ThinLTO to strip unneeded DISubprograms and their transitively referenced debug info. Motivation ---------- Materializing DISubprograms is currently the most expensive operation when doing a ThinLTO build of clang. We want the DISubprogram to be stored in a separate Bitcode block (or the same block as the function body) so we can avoid having to expensively deserialize all DISubprograms together with the global metadata. If a function has been inlined into another subprogram we need to store a reference the block containing the inlined subprogram. Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script that updates LLVM IR testcases to the new format. http://reviews.llvm.org/D19034 <rdar://problem/25256815> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266446 91177308-0d34-0410-b5e6-96231b3b80d8
25 lines
1.0 KiB
LLVM
25 lines
1.0 KiB
LLVM
; RUN: llc -enable-dwarf-directory -mtriple x86_64-apple-darwin10.0.0 < %s | FileCheck %s
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; Verify that the file name is relative to the directory.
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; rdar://problem/8884898
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; CHECK: file 1 "simple.c"
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declare i32 @printf(i8*, ...) nounwind
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define i32 @main() nounwind !dbg !6 {
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ret i32 0
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}
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!12}
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!1 = !DIFile(filename: "simple.c", directory: "/Users/manav/one/two")
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!2 = distinct !DICompileUnit(language: DW_LANG_C89, producer: "LLVM build 00", isOptimized: true, emissionKind: FullDebug, file: !10, enums: !11, retainedTypes: !11)
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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 = distinct !DISubprogram(name: "main", linkageName: "main", line: 9, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !2, file: !10, scope: !1, type: !7)
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!7 = !DISubroutineType(types: !8)
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!8 = !{!5}
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!10 = !DIFile(filename: "simple.c", directory: "/Users/manav/one/two")
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!11 = !{}
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!12 = !{i32 1, !"Debug Info Version", i32 3}
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