mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 11:02:59 +02:00
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
30 lines
1.3 KiB
LLVM
30 lines
1.3 KiB
LLVM
; RUN: llvm-as < %s | llvm-dis | llvm-as | llvm-dis | FileCheck %s
|
|
; RUN: verify-uselistorder %s
|
|
|
|
; CHECK: !named = !{!0, !3, !4, !5, !5}
|
|
!named = !{!0, !3, !4, !5, !6}
|
|
|
|
!llvm.module.flags = !{!7}
|
|
!llvm.dbg.cu = !{!1}
|
|
|
|
; CHECK: !0 = distinct !DISubprogram({{.*}})
|
|
!0 = distinct !DISubprogram(name: "foo", isDefinition: true, unit: !1)
|
|
|
|
!1 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang",
|
|
file: !2,
|
|
isOptimized: true, flags: "-O2",
|
|
splitDebugFilename: "abc.debug", emissionKind: 2)
|
|
!2 = !DIFile(filename: "path/to/file", directory: "/path/to/dir")
|
|
; CHECK: !3 = !DICompositeType({{.*}})
|
|
!3 = !DICompositeType(tag: DW_TAG_structure_type, name: "Class", size: 32, align: 32)
|
|
|
|
; CHECK-NEXT: !4 = !DIImportedEntity(tag: DW_TAG_imported_module, name: "foo", scope: !0, entity: !1, line: 7)
|
|
!4 = !DIImportedEntity(tag: DW_TAG_imported_module, name: "foo", scope: !0,
|
|
entity: !1, line: 7)
|
|
|
|
; CHECK-NEXT: !5 = !DIImportedEntity(tag: DW_TAG_imported_module, scope: !0)
|
|
!5 = !DIImportedEntity(tag: DW_TAG_imported_module, scope: !0)
|
|
!6 = !DIImportedEntity(tag: DW_TAG_imported_module, name: "", scope: !0, entity: null,
|
|
line: 0)
|
|
!7 = !{i32 2, !"Debug Info Version", i32 3}
|