mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 19:12:56 +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
57 lines
2.2 KiB
LLVM
57 lines
2.2 KiB
LLVM
; REQUIRES: object-emission
|
|
|
|
; RUN: llc -mtriple=x86_64-linux-gnu -filetype=obj %s -o - | llvm-dwarfdump -debug-dump=all - | FileCheck %s
|
|
|
|
; Test that we accept and generate DWARF entities for DW_TAG_structure_type,
|
|
; DW_TAG_member and DW_TAG_typedef with no source location. These can come up
|
|
; in some languages with predefined types.
|
|
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
%struct.S = type { %struct.S* }
|
|
|
|
define void @f() !dbg !4 {
|
|
%x = alloca %struct.S, align 8
|
|
; CHECK: DW_TAG_typedef
|
|
; CHECK-NOT: DW_AT_decl_file
|
|
; CHECK-NOT: DW_AT_decl_line
|
|
|
|
; CHECK: DW_TAG_structure_type
|
|
; CHECK-NOT: DW_AT_decl_file
|
|
; CHECK-NOT: DW_AT_decl_line
|
|
|
|
; CHECK: DW_TAG_member
|
|
; CHECK-NOT: DW_AT_decl_file
|
|
; CHECK-NOT: DW_AT_decl_line
|
|
|
|
; CHECK: {{DW_TAG|NULL}}
|
|
call void @llvm.dbg.declare(metadata %struct.S* %x, metadata !10, metadata !16), !dbg !17
|
|
ret void, !dbg !18
|
|
}
|
|
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!7, !8}
|
|
!llvm.ident = !{!9}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
|
|
!1 = !DIFile(filename: "file.c", directory: "/dir")
|
|
!2 = !{}
|
|
!4 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 7, type: !5, isLocal: false, isDefinition: true, scopeLine: 7, isOptimized: false, unit: !0, variables: !2)
|
|
!5 = !DISubroutineType(types: !6)
|
|
!6 = !{null}
|
|
!7 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!8 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!9 = !{!"clang"}
|
|
!10 = !DILocalVariable(name: "x", scope: !4, file: !1, line: 8, type: !11)
|
|
!11 = !DIDerivedType(tag: DW_TAG_typedef, name: "SS", baseType: !12)
|
|
!12 = !DICompositeType(tag: DW_TAG_structure_type, name: "S", size: 64, align: 64, elements: !13)
|
|
!13 = !{!14}
|
|
!14 = !DIDerivedType(tag: DW_TAG_member, name: "s", scope: !12, baseType: !15, size: 64, align: 64)
|
|
!15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64, align: 64)
|
|
!16 = !DIExpression()
|
|
!17 = !DILocation(line: 8, column: 6, scope: !4)
|
|
!18 = !DILocation(line: 9, column: 1, scope: !4)
|