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fb3abba237
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> llvm-svn: 266446
68 lines
3.3 KiB
LLVM
68 lines
3.3 KiB
LLVM
; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck --check-prefix=CHECK-INFO %s
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; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=macro - | FileCheck --check-prefix=CHECK-MACRO %s
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; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=line - | FileCheck --check-prefix=CHECK-LINE %s
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; CHECK-INFO: .debug_info contents:
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; CHECK-INFO: DW_TAG_compile_unit
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; CHECK-INFO-NOT: DW_TAG
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; CHECK-INFO: DW_AT_name {{.*}}"debug-macro.cpp")
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; CHECK-INFO: DW_AT_macro_info {{.*}}(0x00000000)
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; CHECK-INFO: DW_TAG_compile_unit
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; CHECK-INFO-NOT: DW_TAG
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; CHECK-INFO: DW_AT_name {{.*}}"debug-macro1.cpp")
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; CHECK-INFO: DW_AT_macro_info {{.*}}(0x00000044)
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; CHECK-INFO: DW_TAG_compile_unit
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; CHECK-INFO-NOT: DW_TAG
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; CHECK-INFO: DW_AT_name {{.*}}"debug-macro2.cpp")
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; CHECK-INFO-NOT: DW_AT_macro_info
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; CHECK-MACRO: .debug_macinfo contents:
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; CHECK-MACRO-NEXT: DW_MACINFO_define - lineno: 0 macro: NameCMD ValueCMD
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; CHECK-MACRO-NEXT: DW_MACINFO_start_file - lineno: 0 filenum: 1
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; CHECK-MACRO-NEXT: DW_MACINFO_start_file - lineno: 9 filenum: 2
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; CHECK-MACRO-NEXT: DW_MACINFO_define - lineno: 1 macro: NameDef Value
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; CHECK-MACRO-NEXT: DW_MACINFO_undef - lineno: 11 macro: NameUndef
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; CHECK-MACRO-NEXT: DW_MACINFO_end_file
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; CHECK-MACRO-NEXT: DW_MACINFO_undef - lineno: 10 macro: NameUndef2
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; CHECK-MACRO-NEXT: DW_MACINFO_end_file
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; CHECK-MACRO-NEXT: DW_MACINFO_start_file - lineno: 0 filenum: 1
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; CHECK-MACRO-NEXT: DW_MACINFO_end_file
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; CHECK-LINE: .debug_line contents:
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; CHECK-LINE: Dir Mod Time File Len File Name
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; CHECK-LINE: file_names[ 1] {{.*}}debug-macro.cpp
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; CHECK-LINE: file_names[ 2] {{.*}}debug-macro.h
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; CHECK-LINE: Dir Mod Time File Len File Name
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; CHECK-LINE: file_names[ 1] {{.*}}debug-macro1.cpp
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!llvm.dbg.cu = !{!0, !16, !20}
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!llvm.module.flags = !{!13, !14}
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!llvm.ident = !{!15}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2, macros: !3)
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!1 = !DIFile(filename: "debug-macro.cpp", directory: "/")
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!2 = !{}
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!3 = !{!4, !5}
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!4 = !DIMacro(type: DW_MACINFO_define, line: 0, name: "NameCMD", value: "ValueCMD")
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!5 = !DIMacroFile(line: 0, file: !1, nodes: !6)
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!6 = !{!7, !12}
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!7 = !DIMacroFile(line: 9, file: !8, nodes: !9)
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!8 = !DIFile(filename: "debug-macro.h", directory: "/")
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!9 = !{!10, !11}
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!10 = !DIMacro(type: DW_MACINFO_define, line: 1, name: "NameDef", value: "Value")
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!11 = !DIMacro(type: DW_MACINFO_undef, line: 11, name: "NameUndef")
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!12 = !DIMacro(type: DW_MACINFO_undef, line: 10, name: "NameUndef2")
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!13 = !{i32 2, !"Dwarf Version", i32 4}
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!14 = !{i32 1, !"Debug Info Version", i32 3}
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!15 = !{!"clang version 3.5.0 "}
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!16 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !17, enums: !2, retainedTypes: !2, globals: !2, imports: !2, macros: !18)
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!17 = !DIFile(filename: "debug-macro1.cpp", directory: "/")
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!18 = !{!19}
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!19 = !DIMacroFile(line: 0, file: !17, nodes: !2)
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!20 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !21, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
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!21 = !DIFile(filename: "debug-macro2.cpp", directory: "/")
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