mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 12:12:47 +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
37 lines
1.7 KiB
LLVM
37 lines
1.7 KiB
LLVM
; RUN: opt -instcombine -S %s | FileCheck %s
|
|
|
|
%foo = type { i8 }
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define void @_ZN4llvm13ScaledNumbers10multiply64Emm() {
|
|
entry:
|
|
%getU = alloca %foo, align 1
|
|
; This is supposed to make sure that the declare conversion, does not accidentally think the store OF
|
|
; %getU is a store TO %getU. There are valid reasons to have an llvm.dbg.value here, but if the pass
|
|
; is changed to emit such, a more specific check should be added to make sure that any llvm.dbg.value
|
|
; is correct.
|
|
; CHECK-NOT: @llvm.dbg.value(metadata %foo* %getU
|
|
call void @llvm.dbg.declare(metadata %foo* %getU, metadata !3, metadata !6), !dbg !7
|
|
store %foo* %getU, %foo** undef, align 8, !tbaa !8
|
|
unreachable
|
|
}
|
|
|
|
; Function Attrs: nounwind readnone
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
|
|
|
|
attributes #1 = { nounwind readnone }
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!2}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (https://github.com/llvm-mirror/clang 89dda3855cda574f355e6defa1d77bdae5053994) (llvm/trunk 257597)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
|
|
!1 = !DIFile(filename: "none", directory: ".")
|
|
!2 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!3 = !DILocalVariable(name: "getU", scope: !4, file: !1, line: 25, type: !5)
|
|
!4 = distinct !DISubprogram(name: "multiply64", linkageName: "_ZN4llvm13ScaledNumbers10multiply64Emm", scope: null, file: !1, line: 22, isLocal: false, isDefinition: true, scopeLine: 23, flags: DIFlagPrototyped, isOptimized: true, unit: !0)
|
|
!5 = !DICompositeType(tag: DW_TAG_class_type, scope: !4, file: !1, line: 25, size: 8, align: 8)
|
|
!6 = !DIExpression()
|
|
!7 = !DILocation(line: 25, column: 8, scope: !4)
|
|
!8 = !{!9, !9, i64 0}
|
|
!9 = !{i64 0}
|