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
52 lines
3.1 KiB
LLVM
52 lines
3.1 KiB
LLVM
; RUN: %llc_dwarf -march=x86 -asm-verbose < %s | grep DW_TAG_formal_parameter
|
|
|
|
|
|
%struct.Pt = type { double, double }
|
|
%struct.Rect = type { %struct.Pt, %struct.Pt }
|
|
|
|
define double @foo(%struct.Rect* byval %my_r0) nounwind ssp !dbg !1 {
|
|
entry:
|
|
%retval = alloca double ; <double*> [#uses=2]
|
|
%0 = alloca double ; <double*> [#uses=2]
|
|
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
|
|
call void @llvm.dbg.declare(metadata %struct.Rect* %my_r0, metadata !0, metadata !DIExpression()), !dbg !15
|
|
%1 = getelementptr inbounds %struct.Rect, %struct.Rect* %my_r0, i32 0, i32 0, !dbg !16 ; <%struct.Pt*> [#uses=1]
|
|
%2 = getelementptr inbounds %struct.Pt, %struct.Pt* %1, i32 0, i32 0, !dbg !16 ; <double*> [#uses=1]
|
|
%3 = load double, double* %2, align 8, !dbg !16 ; <double> [#uses=1]
|
|
store double %3, double* %0, align 8, !dbg !16
|
|
%4 = load double, double* %0, align 8, !dbg !16 ; <double> [#uses=1]
|
|
store double %4, double* %retval, align 8, !dbg !16
|
|
br label %return, !dbg !16
|
|
|
|
return: ; preds = %entry
|
|
%retval1 = load double, double* %retval, !dbg !16 ; <double> [#uses=1]
|
|
ret double %retval1, !dbg !16
|
|
}
|
|
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
|
|
|
|
!llvm.dbg.cu = !{!3}
|
|
!llvm.module.flags = !{!21}
|
|
|
|
!0 = !DILocalVariable(name: "my_r0", line: 11, arg: 1, scope: !1, file: !2, type: !7)
|
|
!1 = distinct !DISubprogram(name: "foo", linkageName: "foo", line: 11, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !3, file: !19, scope: !2, type: !4)
|
|
!2 = !DIFile(filename: "b2.c", directory: "/tmp/")
|
|
!3 = distinct !DICompileUnit(language: DW_LANG_C89, producer: "4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", isOptimized: false, emissionKind: FullDebug, file: !19, enums: !20, retainedTypes: !20, imports: null)
|
|
!4 = !DISubroutineType(types: !5)
|
|
!5 = !{!6, !7}
|
|
!6 = !DIBasicType(tag: DW_TAG_base_type, name: "double", size: 64, align: 64, encoding: DW_ATE_float)
|
|
!7 = !DICompositeType(tag: DW_TAG_structure_type, name: "Rect", line: 6, size: 256, align: 64, file: !19, scope: !2, elements: !8)
|
|
!8 = !{!9, !14}
|
|
!9 = !DIDerivedType(tag: DW_TAG_member, name: "P1", line: 7, size: 128, align: 64, file: !19, scope: !7, baseType: !10)
|
|
!10 = !DICompositeType(tag: DW_TAG_structure_type, name: "Pt", line: 1, size: 128, align: 64, file: !19, scope: !2, elements: !11)
|
|
!11 = !{!12, !13}
|
|
!12 = !DIDerivedType(tag: DW_TAG_member, name: "x", line: 2, size: 64, align: 64, file: !19, scope: !10, baseType: !6)
|
|
!13 = !DIDerivedType(tag: DW_TAG_member, name: "y", line: 3, size: 64, align: 64, offset: 64, file: !19, scope: !10, baseType: !6)
|
|
!14 = !DIDerivedType(tag: DW_TAG_member, name: "P2", line: 8, size: 128, align: 64, offset: 128, file: !19, scope: !7, baseType: !10)
|
|
!15 = !DILocation(line: 11, scope: !1)
|
|
!16 = !DILocation(line: 12, scope: !17)
|
|
!17 = distinct !DILexicalBlock(line: 11, column: 0, file: !19, scope: !1)
|
|
!19 = !DIFile(filename: "b2.c", directory: "/tmp/")
|
|
!20 = !{}
|
|
!21 = !{i32 1, !"Debug Info Version", i32 3}
|