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3363ed7b0a
[this re-applies c0176916a4824812d25a5a22c4ff7c95857b0cd6 with the correct commit message and phabricator link] This addresses point 1 of PR44213. https://bugs.llvm.org/show_bug.cgi?id=44213 The DW_AT_LLVM_sysroot attribute is used for Clang module debug info, to allow LLDB to import a Clang module from source. Currently it is part of each DW_TAG_module, however, it is the same for all modules in a compile unit. It is more efficient and less ambiguous to store it once in the DW_TAG_compile_unit. This should have no effect on DWARF consumers other than LLDB. Differential Revision: https://reviews.llvm.org/D71732
32 lines
1.5 KiB
LLVM
32 lines
1.5 KiB
LLVM
; RUN: llc -mtriple=x86_64-apple-darwin %s -o - -filetype=obj \
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; RUN: | llvm-dwarfdump -debug-info - | FileCheck %s
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; Clang modules leave Skeleton CUs as breadcrumbs to point from the object files
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; to the pcm containing the module's debug info.
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; CHECK: Compile Unit:
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; CHECK: DW_TAG_compile_unit
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; CHECK: DW_TAG_imported_declaration
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; CHECK: Compile Unit:
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; CHECK: DW_TAG_compile_unit
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; CHECK: DW_AT_name {{.*}}Foo
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; CHECK: DW_AT_{{.*}}dwo_id {{.*}}04d2
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; CHECK: DW_AT_{{.*}}dwo_name {{.*}}"/Foo.pcm"
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source_filename = "modules.m"
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.12.0"
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!llvm.dbg.cu = !{!0, !6}
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!llvm.module.flags = !{!15, !16}
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!llvm.linker.options = !{}
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!0 = distinct !DICompileUnit(language: DW_LANG_ObjC, file: !1, producer: "clang version 5.0.0 (trunk 308357) (llvm/trunk 308379)", emissionKind: FullDebug, imports: !3, sysroot: "/")
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!1 = !DIFile(filename: "modules.m", directory: "/")
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!3 = !{!4}
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!4 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !0, entity: !5, line: 122)
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!5 = !DIModule(scope: null, name: "Foo", includePath: ".")
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!6 = distinct !DICompileUnit(language: DW_LANG_ObjC, file: !7, producer: "clang version 5.0.0 (trunk 308357) (llvm/trunk 308379)", isOptimized: true, runtimeVersion: 0, splitDebugFilename: "/Foo.pcm", emissionKind: FullDebug, dwoId: 1234)
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!7 = !DIFile(filename: "Foo", 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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