mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 11:42:57 +01:00
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
29 lines
1.5 KiB
LLVM
29 lines
1.5 KiB
LLVM
; RUN: llc -o /dev/null < %s
|
|
; PR7662
|
|
; Do not add variables to !11 because it is a declaration entry.
|
|
|
|
define i32 @bar() nounwind readnone ssp !dbg !0 {
|
|
entry:
|
|
ret i32 42, !dbg !9
|
|
}
|
|
|
|
!llvm.dbg.cu = !{!2}
|
|
!llvm.module.flags = !{!15}
|
|
!llvm.dbg.lv.foo = !{!7}
|
|
|
|
!0 = distinct !DISubprogram(name: "bar", linkageName: "bar", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: true, unit: !2, file: !12, scope: !1, type: !3)
|
|
!1 = !DIFile(filename: "one.c", directory: "/private/tmp")
|
|
!2 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang 2.8", isOptimized: true, emissionKind: FullDebug, file: !12, enums: !14, retainedTypes: !14)
|
|
!3 = !DISubroutineType(types: !4)
|
|
!4 = !{!5}
|
|
!5 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!6 = distinct !DISubprogram(name: "foo", linkageName: "foo", line: 7, isLocal: true, isDefinition: true, virtualIndex: 6, isOptimized: true, unit: !2, file: !12, scope: !1, type: !3, declaration: !11)
|
|
!7 = !DILocalVariable(name: "one", line: 8, scope: !8, file: !1, type: !5)
|
|
!8 = distinct !DILexicalBlock(line: 7, column: 18, file: !12, scope: !6)
|
|
!9 = !DILocation(line: 4, column: 3, scope: !10)
|
|
!10 = distinct !DILexicalBlock(line: 3, column: 11, file: !12, scope: !0)
|
|
!11 = !DISubprogram(name: "foo", linkageName: "foo", line: 7, isLocal: true, isDefinition: false, virtualIndex: 6, isOptimized: true, file: !12, scope: !1, type: !3)
|
|
!12 = !DIFile(filename: "one.c", directory: "/private/tmp")
|
|
!14 = !{}
|
|
!15 = !{i32 1, !"Debug Info Version", i32 3}
|