mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2025-02-01 05:01:59 +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
28 lines
1.3 KiB
LLVM
28 lines
1.3 KiB
LLVM
; RUN: llc -mtriple=x86_64-apple-darwin %s -o %t -filetype=obj
|
|
; RUN: llvm-dwarfdump -debug-dump=info %t | FileCheck %s
|
|
|
|
; Make sure that structures have a decl file and decl line attached.
|
|
; CHECK: DW_TAG_structure_type
|
|
; CHECK: DW_AT_decl_file
|
|
; CHECK: DW_AT_decl_line
|
|
; CHECK: DW_TAG_member
|
|
|
|
%struct.foo = type { i32 }
|
|
|
|
@f = common global %struct.foo zeroinitializer, align 4
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!12}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.1 (trunk 152837) (llvm/trunk 152845)", isOptimized: false, emissionKind: FullDebug, file: !11, enums: !1, retainedTypes: !1, globals: !3, imports: !1)
|
|
!1 = !{}
|
|
!3 = !{!5}
|
|
!5 = !DIGlobalVariable(name: "f", line: 5, isLocal: false, isDefinition: true, scope: null, file: !6, type: !7, variable: %struct.foo* @f)
|
|
!6 = !DIFile(filename: "struct_bug.c", directory: "/Users/echristo/tmp")
|
|
!7 = !DICompositeType(tag: DW_TAG_structure_type, name: "foo", line: 1, size: 32, align: 32, file: !11, elements: !8)
|
|
!8 = !{!9}
|
|
!9 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 2, size: 32, align: 32, file: !11, scope: !7, baseType: !10)
|
|
!10 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!11 = !DIFile(filename: "struct_bug.c", directory: "/Users/echristo/tmp")
|
|
!12 = !{i32 1, !"Debug Info Version", i32 3}
|